TY  - JOUR
AU  - Jovanović, Maja
AU  - Savić, Jasmina
AU  - Kovačević, Renata
AU  - Tasić, Viša
AU  - Todorović, Žaklina
AU  - Stevanović, Svetlana
AU  - Manojlović, Dragan D.
AU  - Jovašević-Stojanović, Milena
PY  - 2020
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/3820
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8750
AB  - Urban airborne particles contain a wide spectrum of components, known to have harmful effects on human health. This study reports a detailed investigation of fine particulate matter (PM2.5), chemical content and oxidative potential derived from two different urban environments. During summer and winter, 20-day campaigns were conducted at Belgrade city center (urban-background site – UB) and Bor (urban-industrial site – UI). Using various analytical techniques, carbonaceous compounds, water-soluble inorganic ions, major and trace elements were determined, while the oxidative potential of PM2.5 was estimated by dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay (OPDCFH values). The mean PM2.5 concentrations in both urban environments were above the recommended daily value, and the dominant PM2.5 mass contributor was organic matter (29–55%). The OC/EC ratio was significantly higher at UB site during winter, which was an indication of a considerable contribution of secondary organic carbon to the overall organic carbon (OC). Water-soluble organic carbon (WSOC) was also higher at UB than at UI site, and it probably came from the same sources as OC. In general, the different partition of secondary organic aerosol (SOA) in warm and cold periods affected the number of organic components. Sulfates and nitrates were the most abundant ions at both sites and they counted approximately 40% (summer) and 50% (winter) of total ions. Further, the concentrations of the most elements, particularly some potentially carcinogenic elements such as As, Cd and Pb were significantly higher at UI, due to the emissions from the copper smelter complex in the vicinity. The mean OPDCFH values were similar during the summer at both sampling sites, whereas a statistically significant difference between sites was noticed in favor of UB environment in winter.
T2  - Science of the Total Environment
T1  - Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments
VL  - 708
SP  - 135209
DO  - 10.1016/j.scitotenv.2019.135209
ER  - 

@article{
author = "Jovanović, Maja and Savić, Jasmina and Kovačević, Renata and Tasić, Viša and Todorović, Žaklina and Stevanović, Svetlana and Manojlović, Dragan D. and Jovašević-Stojanović, Milena",
year = "2020",
abstract = "Urban airborne particles contain a wide spectrum of components, known to have harmful effects on human health. This study reports a detailed investigation of fine particulate matter (PM2.5), chemical content and oxidative potential derived from two different urban environments. During summer and winter, 20-day campaigns were conducted at Belgrade city center (urban-background site – UB) and Bor (urban-industrial site – UI). Using various analytical techniques, carbonaceous compounds, water-soluble inorganic ions, major and trace elements were determined, while the oxidative potential of PM2.5 was estimated by dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay (OPDCFH values). The mean PM2.5 concentrations in both urban environments were above the recommended daily value, and the dominant PM2.5 mass contributor was organic matter (29–55%). The OC/EC ratio was significantly higher at UB site during winter, which was an indication of a considerable contribution of secondary organic carbon to the overall organic carbon (OC). Water-soluble organic carbon (WSOC) was also higher at UB than at UI site, and it probably came from the same sources as OC. In general, the different partition of secondary organic aerosol (SOA) in warm and cold periods affected the number of organic components. Sulfates and nitrates were the most abundant ions at both sites and they counted approximately 40% (summer) and 50% (winter) of total ions. Further, the concentrations of the most elements, particularly some potentially carcinogenic elements such as As, Cd and Pb were significantly higher at UI, due to the emissions from the copper smelter complex in the vicinity. The mean OPDCFH values were similar during the summer at both sampling sites, whereas a statistically significant difference between sites was noticed in favor of UB environment in winter.",
journal = "Science of the Total Environment",
title = "Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments",
volume = "708",
pages = "135209",
doi = "10.1016/j.scitotenv.2019.135209"
}

Jovanović, M., Savić, J., Kovačević, R., Tasić, V., Todorović, Ž., Stevanović, S., Manojlović, D. D.,& Jovašević-Stojanović, M.. (2020). Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments. in Science of the Total Environment, 708, 135209.
https://doi.org/10.1016/j.scitotenv.2019.135209

Jovanović M, Savić J, Kovačević R, Tasić V, Todorović Ž, Stevanović S, Manojlović DD, Jovašević-Stojanović M. Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments. in Science of the Total Environment. 2020;708:135209.
doi:10.1016/j.scitotenv.2019.135209 .

Jovanović, Maja, Savić, Jasmina, Kovačević, Renata, Tasić, Viša, Todorović, Žaklina, Stevanović, Svetlana, Manojlović, Dragan D., Jovašević-Stojanović, Milena, "Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments" in Science of the Total Environment, 708 (2020):135209,
https://doi.org/10.1016/j.scitotenv.2019.135209 . .

TY  - JOUR
AU  - Jovanović, Maja
AU  - Savić, Jasmina
AU  - Salimi, Farhad
AU  - Stevanović, Svetlana
AU  - Brown, Reece A.
AU  - Jovašević-Stojanović, Milena
AU  - Manojlovic, Dragan
AU  - Bartonova, Alena
AU  - Bottle, Steven
AU  - Ristovski, Zoran
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8677
AB  - To estimate the oxidative potential (OP) of particulate matter (PM), two commonly used cell-free, molecular probes were applied: dithiothreitol (DTT) and dichloro-dihydro-fluorescein diacetate (DCFH-DA), and their performance was compared with 9,10-bis (phenylethynyl) anthracene-nitroxide (BPEAnit). To the best of our knowledge, this is the first study in which the performance of the DTT and DCFH has been compared with the BPEAnit probe. The average concentrations of PM, organic carbon (OC) and elemental carbon (EC) for fine (PM2.5) and coarse (PM10) particles were determined. The results were 44.8 ± 13.7, 9.8 ± 5.1 and 9.3 ± 4.8 µg·m−3 for PM2.5 and 75.5 ± 25.1, 16.3 ± 8.7 and 11.8 ± 5.3 µg·m−3 for PM10, respectively, for PM, OC and EC. The water-soluble organic carbon (WSOC) fraction accounted for 42 ± 14% and 28 ± 9% of organic carbon in PM2.5 and PM10, respectively. The average volume normalized OP values for the three assays depended on both the sampling periods and the PM fractions. The OPBPEAnit had its peak at 2 p.m.; in the afternoon, it was three times higher compared to the morning and late afternoon values. The DCFH and BPEAnit results were correlated (r = 0.64), while there was no good agreement between the BPEAnit and the DTT (r = 0.14). The total organic content of PM does not necessarily represent oxidative capacity and it shows varying correlation with the OP. With respect to the two PM fractions studied, the OP was mostly associated with smaller particles.
T2  - International Journal of Environmental Research and Public Health
T1  - Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assays
VL  - 16
IS  - 24
SP  - 4906
DO  - 10.3390/ijerph16244906
ER  - 

@article{
author = "Jovanović, Maja and Savić, Jasmina and Salimi, Farhad and Stevanović, Svetlana and Brown, Reece A. and Jovašević-Stojanović, Milena and Manojlovic, Dragan and Bartonova, Alena and Bottle, Steven and Ristovski, Zoran",
year = "2019",
abstract = "To estimate the oxidative potential (OP) of particulate matter (PM), two commonly used cell-free, molecular probes were applied: dithiothreitol (DTT) and dichloro-dihydro-fluorescein diacetate (DCFH-DA), and their performance was compared with 9,10-bis (phenylethynyl) anthracene-nitroxide (BPEAnit). To the best of our knowledge, this is the first study in which the performance of the DTT and DCFH has been compared with the BPEAnit probe. The average concentrations of PM, organic carbon (OC) and elemental carbon (EC) for fine (PM2.5) and coarse (PM10) particles were determined. The results were 44.8 ± 13.7, 9.8 ± 5.1 and 9.3 ± 4.8 µg·m−3 for PM2.5 and 75.5 ± 25.1, 16.3 ± 8.7 and 11.8 ± 5.3 µg·m−3 for PM10, respectively, for PM, OC and EC. The water-soluble organic carbon (WSOC) fraction accounted for 42 ± 14% and 28 ± 9% of organic carbon in PM2.5 and PM10, respectively. The average volume normalized OP values for the three assays depended on both the sampling periods and the PM fractions. The OPBPEAnit had its peak at 2 p.m.; in the afternoon, it was three times higher compared to the morning and late afternoon values. The DCFH and BPEAnit results were correlated (r = 0.64), while there was no good agreement between the BPEAnit and the DTT (r = 0.14). The total organic content of PM does not necessarily represent oxidative capacity and it shows varying correlation with the OP. With respect to the two PM fractions studied, the OP was mostly associated with smaller particles.",
journal = "International Journal of Environmental Research and Public Health",
title = "Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assays",
volume = "16",
number = "24",
pages = "4906",
doi = "10.3390/ijerph16244906"
}

Jovanović, M., Savić, J., Salimi, F., Stevanović, S., Brown, R. A., Jovašević-Stojanović, M., Manojlovic, D., Bartonova, A., Bottle, S.,& Ristovski, Z.. (2019). Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assays. in International Journal of Environmental Research and Public Health, 16(24), 4906.
https://doi.org/10.3390/ijerph16244906

Jovanović M, Savić J, Salimi F, Stevanović S, Brown RA, Jovašević-Stojanović M, Manojlovic D, Bartonova A, Bottle S, Ristovski Z. Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assays. in International Journal of Environmental Research and Public Health. 2019;16(24):4906.
doi:10.3390/ijerph16244906 .

Jovanović, Maja, Savić, Jasmina, Salimi, Farhad, Stevanović, Svetlana, Brown, Reece A., Jovašević-Stojanović, Milena, Manojlovic, Dragan, Bartonova, Alena, Bottle, Steven, Ristovski, Zoran, "Measurements of Oxidative Potential of Particulate Matter at Belgrade Tunnel; Comparison of BPEAnit, DTT and DCFH Assays" in International Journal of Environmental Research and Public Health, 16, no. 24 (2019):4906,
https://doi.org/10.3390/ijerph16244906 . .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Marković, Zoran J.
AU  - Erić, Milić D.
AU  - Oka, Simeon N.
AU  - Repić, Branislav
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8981
AB  - Paper presents short review of research problems, applied methods for solving problems and main results obtained by the researchers in Laboratory for Ther-mal Engineering and Energy (LTE) of the "Vinca" Institute of Nuclear Sciences, Belgrade, Serbia dealing with pulverized coal combustion processes and tech-nologies for reduction of pollutions problems at thermal power plants in a period since 2000. The presented results were published in numerous studies realized for different users, Ph. D., Masters, and Specialist thesis, in international and domestic scientific journals and monographs, presented at numerous internation-al and domestic scientific conferences, etc. Presented research projects and re-sults of applied research projects realized at pulverized coal combustion thermal power plants clearly show that LTE team was involved in key activities of reha-bilitation and modernization, including implementation of best available technol-ogies for pollution reduction at thermal power plants, in the region of South East Europe.
T2  - Thermal Science
T1  - Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B
VL  - 23
IS  - Suppl. 5
SP  - 1611
EP  - 1626
DO  - 10.2298/TSCI19S5611R
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Cvetinović, Dejan and Marković, Zoran J. and Erić, Milić D. and Oka, Simeon N. and Repić, Branislav",
year = "2019",
abstract = "Paper presents short review of research problems, applied methods for solving problems and main results obtained by the researchers in Laboratory for Ther-mal Engineering and Energy (LTE) of the "Vinca" Institute of Nuclear Sciences, Belgrade, Serbia dealing with pulverized coal combustion processes and tech-nologies for reduction of pollutions problems at thermal power plants in a period since 2000. The presented results were published in numerous studies realized for different users, Ph. D., Masters, and Specialist thesis, in international and domestic scientific journals and monographs, presented at numerous internation-al and domestic scientific conferences, etc. Presented research projects and re-sults of applied research projects realized at pulverized coal combustion thermal power plants clearly show that LTE team was involved in key activities of reha-bilitation and modernization, including implementation of best available technol-ogies for pollution reduction at thermal power plants, in the region of South East Europe.",
journal = "Thermal Science",
title = "Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B",
volume = "23",
number = "Suppl. 5",
pages = "1611-1626",
doi = "10.2298/TSCI19S5611R"
}

Stefanović, P. Lj., Cvetinović, D., Marković, Z. J., Erić, M. D., Oka, S. N.,& Repić, B.. (2019). Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B. in Thermal Science, 23(Suppl. 5), 1611-1626.
https://doi.org/10.2298/TSCI19S5611R

Stefanović PL, Cvetinović D, Marković ZJ, Erić MD, Oka SN, Repić B. Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B. in Thermal Science. 2019;23(Suppl. 5):1611-1626.
doi:10.2298/TSCI19S5611R .

Stefanović, Predrag Lj., Cvetinović, Dejan, Marković, Zoran J., Erić, Milić D., Oka, Simeon N., Repić, Branislav, "Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B" in Thermal Science, 23, no. Suppl. 5 (2019):1611-1626,
https://doi.org/10.2298/TSCI19S5611R . .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Nemoda, Stevan
AU  - Komatina, Mirko S.
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8401
AB  - The paper presents results of experimental investigation performed in order to examine kinetics of loose biomass combustion in vertical tube reactor. The investigation conducted included continuous measurement of the fuel mass loss rate, with two biomass combustion models (piston and batch model) proposed, each relying on appropriate theoretical postulates. Results obtained indicated that piston combustion model had shown better agreement between theoretical and experimental data and was therefore used to further analyse effects of excess-air on the combustion kinetics, as well as associated effects of flue gas recirculation. Recirculation of cold flue gases is used to lower peak temperature inside the furnace, as well as to reduce a zone where ash melting problems may potentially occur. During the investigation performed, effects of flue gas recirculation on the combustion process were simulated by simultaneously injecting nitrogen and air flows into the furnace. This was deemed appropriate to simulate real-life conditions prevailing in the furnace with gas recirculation. Experiments were conducted on specially designed and constructed apparatus that enabled kinetic parameters to be determined for the combustion of different types of biomass. Results obtained have indicated that quantity of air affects kinetics of biomass combustion and that increased recirculation leads to reduced biomass reaction rate. The same conclusion was reached based on the results of experiments conducted with two different types of agro-biomass, namely wheat straw and corn stalks, which are most commonly used for energy generation. Results achieved are deemed particularly important when it comes to design of new plants that utilize cigarette type combustion system, but also for development of numerical models used to simulate combustion of biomass bales, with special emphasis placed on the impact of recirculation gases on the combustion kinetics. © 2018 Energy Institute
T2  - Journal of the Energy Institute
T1  - Experimental investigation on the kinetics of biomass combustion in vertical tube reactor
VL  - 92
IS  - 4
SP  - 1077
EP  - 1090
DO  - 10.1016/j.joei.2018.06.009
ER  - 

@article{
author = "Erić, Aleksandar and Nemoda, Stevan and Komatina, Mirko S. and Dakić, Dragoljub V. and Repić, Branislav",
year = "2019",
abstract = "The paper presents results of experimental investigation performed in order to examine kinetics of loose biomass combustion in vertical tube reactor. The investigation conducted included continuous measurement of the fuel mass loss rate, with two biomass combustion models (piston and batch model) proposed, each relying on appropriate theoretical postulates. Results obtained indicated that piston combustion model had shown better agreement between theoretical and experimental data and was therefore used to further analyse effects of excess-air on the combustion kinetics, as well as associated effects of flue gas recirculation. Recirculation of cold flue gases is used to lower peak temperature inside the furnace, as well as to reduce a zone where ash melting problems may potentially occur. During the investigation performed, effects of flue gas recirculation on the combustion process were simulated by simultaneously injecting nitrogen and air flows into the furnace. This was deemed appropriate to simulate real-life conditions prevailing in the furnace with gas recirculation. Experiments were conducted on specially designed and constructed apparatus that enabled kinetic parameters to be determined for the combustion of different types of biomass. Results obtained have indicated that quantity of air affects kinetics of biomass combustion and that increased recirculation leads to reduced biomass reaction rate. The same conclusion was reached based on the results of experiments conducted with two different types of agro-biomass, namely wheat straw and corn stalks, which are most commonly used for energy generation. Results achieved are deemed particularly important when it comes to design of new plants that utilize cigarette type combustion system, but also for development of numerical models used to simulate combustion of biomass bales, with special emphasis placed on the impact of recirculation gases on the combustion kinetics. © 2018 Energy Institute",
journal = "Journal of the Energy Institute",
title = "Experimental investigation on the kinetics of biomass combustion in vertical tube reactor",
volume = "92",
number = "4",
pages = "1077-1090",
doi = "10.1016/j.joei.2018.06.009"
}

Erić, A., Nemoda, S., Komatina, M. S., Dakić, D. V.,& Repić, B.. (2019). Experimental investigation on the kinetics of biomass combustion in vertical tube reactor. in Journal of the Energy Institute, 92(4), 1077-1090.
https://doi.org/10.1016/j.joei.2018.06.009

Erić A, Nemoda S, Komatina MS, Dakić DV, Repić B. Experimental investigation on the kinetics of biomass combustion in vertical tube reactor. in Journal of the Energy Institute. 2019;92(4):1077-1090.
doi:10.1016/j.joei.2018.06.009 .

Erić, Aleksandar, Nemoda, Stevan, Komatina, Mirko S., Dakić, Dragoljub V., Repić, Branislav, "Experimental investigation on the kinetics of biomass combustion in vertical tube reactor" in Journal of the Energy Institute, 92, no. 4 (2019):1077-1090,
https://doi.org/10.1016/j.joei.2018.06.009 . .

TY  - JOUR
AU  - Repić, Branislav
AU  - Stefanović, Predrag Lj.
AU  - Belošević, Srđan
AU  - Crnomarković, Nenad Đ.
AU  - Oka, Simeon N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8946
AB  - The paper presents an overview of the results of the investigations of the process-es that take place in pulverized coal combustion boilers and power plants which, in a longer period of time, were realized in the Laboratory for Thermal Engineer-ing and Energy of the "Vinca" Institute of Nuclear Sciences. The presented re-sults were published in numerous studies realized for different users, Ph. D., M. Sc., and specialist thesis, in international and domestic scientific journals and monographs, presented at numerous international and domestic scientific meet-ings, etc. The main goal of the paper is to chronologically present the results of domestic research that at one time were at an enviable international level, with concrete practical applications for domestic users. This is especially important to contrast the present situation when domestic research in this area is scarce and when the energy sector relies practically only on imported technologies and for-eign consultancy. © 2019 Society of Thermal Engineers of Serbia.
T2  - Thermal Science
T1  - Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A
VL  - 23
IS  - Suppl. 5
SP  - S1587
EP  - S1609
DO  - 10.2298/TSCI191030443R
ER  - 

@article{
author = "Repić, Branislav and Stefanović, Predrag Lj. and Belošević, Srđan and Crnomarković, Nenad Đ. and Oka, Simeon N.",
year = "2019",
abstract = "The paper presents an overview of the results of the investigations of the process-es that take place in pulverized coal combustion boilers and power plants which, in a longer period of time, were realized in the Laboratory for Thermal Engineer-ing and Energy of the "Vinca" Institute of Nuclear Sciences. The presented re-sults were published in numerous studies realized for different users, Ph. D., M. Sc., and specialist thesis, in international and domestic scientific journals and monographs, presented at numerous international and domestic scientific meet-ings, etc. The main goal of the paper is to chronologically present the results of domestic research that at one time were at an enviable international level, with concrete practical applications for domestic users. This is especially important to contrast the present situation when domestic research in this area is scarce and when the energy sector relies practically only on imported technologies and for-eign consultancy. © 2019 Society of Thermal Engineers of Serbia.",
journal = "Thermal Science",
title = "Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A",
volume = "23",
number = "Suppl. 5",
pages = "S1587-S1609",
doi = "10.2298/TSCI191030443R"
}

Repić, B., Stefanović, P. Lj., Belošević, S., Crnomarković, N. Đ.,& Oka, S. N.. (2019). Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A. in Thermal Science, 23(Suppl. 5), S1587-S1609.
https://doi.org/10.2298/TSCI191030443R

Repić B, Stefanović PL, Belošević S, Crnomarković NĐ, Oka SN. Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A. in Thermal Science. 2019;23(Suppl. 5):S1587-S1609.
doi:10.2298/TSCI191030443R .

Repić, Branislav, Stefanović, Predrag Lj., Belošević, Srđan, Crnomarković, Nenad Đ., Oka, Simeon N., "Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A" in Thermal Science, 23, no. Suppl. 5 (2019):S1587-S1609,
https://doi.org/10.2298/TSCI191030443R . .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Nemoda, Stevan
AU  - Komatina, Mirko
AU  - Repić, Branislav
AU  - Dakic, Dragoljub
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8989
AB  - This paper presents numerical and experimental investigations of complex and interrelated physical and chemical phenomena that occur during combustion of baled soybean residue in the furnace with the cigarette type of combustion. The result of comprehensive research is reactive flow model of biomass combustion inside furnace. Model is described by set of PDE which define momentum, heat and mass transfer processes in porous and fluid system. The main aim of developed CFD model is numerical simulation of combustion process inside the cigarette furnace. It is also used to provide deeper insight in complex processes occurring during biomass combustion. Verification of proposed numerical model was performed through comprehensive experimental tests on the experimental-industrial plant of 1.5 MW boiler for heating the greenhouses in the Agricultural Corporation in Belgrade. The tests included measurement of flow rate and air and flue gas temperature input and output values on the furnace that are taken as the boundary conditions of the developed model. Comparison of the experimental results shows satisfactory agreement with numerical results (the maximum relative deviation of calculation and measurement temperatures are 10-45%), therefore the developed mathematical model could be used to analyse the effects of structural and parametric (fuel composition, power rate, air excess etc.) changes of the facility, from the standpoint of energy efficiency and ecology.
T2  - Thermal Science
T1  - Modeling of transport processes in the cigarette principle combustion furnace
VL  - 23
IS  - Suppl. 5
SP  - 1499
EP  - 1510
DO  - 10.2298/TSCI180226318E
ER  - 

@article{
author = "Erić, Aleksandar and Nemoda, Stevan and Komatina, Mirko and Repić, Branislav and Dakic, Dragoljub",
year = "2019",
abstract = "This paper presents numerical and experimental investigations of complex and interrelated physical and chemical phenomena that occur during combustion of baled soybean residue in the furnace with the cigarette type of combustion. The result of comprehensive research is reactive flow model of biomass combustion inside furnace. Model is described by set of PDE which define momentum, heat and mass transfer processes in porous and fluid system. The main aim of developed CFD model is numerical simulation of combustion process inside the cigarette furnace. It is also used to provide deeper insight in complex processes occurring during biomass combustion. Verification of proposed numerical model was performed through comprehensive experimental tests on the experimental-industrial plant of 1.5 MW boiler for heating the greenhouses in the Agricultural Corporation in Belgrade. The tests included measurement of flow rate and air and flue gas temperature input and output values on the furnace that are taken as the boundary conditions of the developed model. Comparison of the experimental results shows satisfactory agreement with numerical results (the maximum relative deviation of calculation and measurement temperatures are 10-45%), therefore the developed mathematical model could be used to analyse the effects of structural and parametric (fuel composition, power rate, air excess etc.) changes of the facility, from the standpoint of energy efficiency and ecology.",
journal = "Thermal Science",
title = "Modeling of transport processes in the cigarette principle combustion furnace",
volume = "23",
number = "Suppl. 5",
pages = "1499-1510",
doi = "10.2298/TSCI180226318E"
}

Erić, A., Nemoda, S., Komatina, M., Repić, B.,& Dakic, D.. (2019). Modeling of transport processes in the cigarette principle combustion furnace. in Thermal Science, 23(Suppl. 5), 1499-1510.
https://doi.org/10.2298/TSCI180226318E

Erić A, Nemoda S, Komatina M, Repić B, Dakic D. Modeling of transport processes in the cigarette principle combustion furnace. in Thermal Science. 2019;23(Suppl. 5):1499-1510.
doi:10.2298/TSCI180226318E .

Erić, Aleksandar, Nemoda, Stevan, Komatina, Mirko, Repić, Branislav, Dakic, Dragoljub, "Modeling of transport processes in the cigarette principle combustion furnace" in Thermal Science, 23, no. Suppl. 5 (2019):1499-1510,
https://doi.org/10.2298/TSCI180226318E . .

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Nemoda, Stevan
AU  - Paprika, Milijana
AU  - Marinković, Ana D.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8986
AB  - In Laboratory for Thermal Engineering and Energy of Institute Vinca, University of Belgrade, a 2-D CFD modeling procedure of numerical simulation of unconventional liquid fuel combustion in bubbling fluidized bed has been developed. This procedure is based on a two-fluid Euler-Euler approach modeling a fluidized bed with the determination of the velocities field of gas and particulates in two-phase, granular flows, analog to the kinetic theory of gases. This model describes in detail the unsteady motion of gas and solid phases, the formation and movement of bubbles with the combustion process in the fluidized bed, but temperature profiles calculated by the bed height differ to some extent from the experimentally obtained profiles. This discrepancy is probably due to the inability of a two-fluid CFD model to give a realistic simulation of the liquid fuel mixing in a fluidized bed. Therefore, an analytical model has been developed, where one of the basic assumptions is that the particles are mixed in the vertical direction of fluidized bed mainly by the bubble wakes. The proposed zonal type of calculating procedure is based on Davidson and Harrison two-phase model of the bubbling fluidized bed, where fluidized bed is divided into zones within which material and energy balances are set.
T2  - Thermal Science
T1  - Application of analytical and CFD models of liquid fuels combustion in a fluidized bed
VL  - 23
IS  - Suppl. 5
SP  - 1627
EP  - 1636
DO  - 10.2298/TSCI180226317M
ER  - 

@article{
author = "Mladenović, Milica R. and Nemoda, Stevan and Paprika, Milijana and Marinković, Ana D.",
year = "2019",
abstract = "In Laboratory for Thermal Engineering and Energy of Institute Vinca, University of Belgrade, a 2-D CFD modeling procedure of numerical simulation of unconventional liquid fuel combustion in bubbling fluidized bed has been developed. This procedure is based on a two-fluid Euler-Euler approach modeling a fluidized bed with the determination of the velocities field of gas and particulates in two-phase, granular flows, analog to the kinetic theory of gases. This model describes in detail the unsteady motion of gas and solid phases, the formation and movement of bubbles with the combustion process in the fluidized bed, but temperature profiles calculated by the bed height differ to some extent from the experimentally obtained profiles. This discrepancy is probably due to the inability of a two-fluid CFD model to give a realistic simulation of the liquid fuel mixing in a fluidized bed. Therefore, an analytical model has been developed, where one of the basic assumptions is that the particles are mixed in the vertical direction of fluidized bed mainly by the bubble wakes. The proposed zonal type of calculating procedure is based on Davidson and Harrison two-phase model of the bubbling fluidized bed, where fluidized bed is divided into zones within which material and energy balances are set.",
journal = "Thermal Science",
title = "Application of analytical and CFD models of liquid fuels combustion in a fluidized bed",
volume = "23",
number = "Suppl. 5",
pages = "1627-1636",
doi = "10.2298/TSCI180226317M"
}

Mladenović, M. R., Nemoda, S., Paprika, M.,& Marinković, A. D.. (2019). Application of analytical and CFD models of liquid fuels combustion in a fluidized bed. in Thermal Science, 23(Suppl. 5), 1627-1636.
https://doi.org/10.2298/TSCI180226317M

Mladenović MR, Nemoda S, Paprika M, Marinković AD. Application of analytical and CFD models of liquid fuels combustion in a fluidized bed. in Thermal Science. 2019;23(Suppl. 5):1627-1636.
doi:10.2298/TSCI180226317M .

Mladenović, Milica R., Nemoda, Stevan, Paprika, Milijana, Marinković, Ana D., "Application of analytical and CFD models of liquid fuels combustion in a fluidized bed" in Thermal Science, 23, no. Suppl. 5 (2019):1627-1636,
https://doi.org/10.2298/TSCI180226317M . .

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Marinković, Ana D.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1883
AB  - In order to achieve the main Applicable combustion control systems in grate-fired bogoals of sustainable development through the harmonization of rising energy needs with environmental protection, modern society promotes the use of biomass as a renewable energy source. Biomass, like any taother fuel, emits certain pollutants from combustion, nitrogen oxides (NOx) being one of them. Control of NOx emission, originated in biomass combustion, is becoming a very significant technical challenge due to the imposition of increasingly strict emission limits. The experimental research and industrial experiences (that are not always easily available) were analyzed in order to make an overview of proven and prospective technical solutions, as well as directions for practical applications for reducing NOx emissions originating from biomass combustion. The denitrification techniques according to the broadest classification (pre-combustion, combustion control and post-combustion) have been analyzed. As the NOx emission is more strongly influenced by the nitrogen content of biomass fuels (especially of those with significant nitrogen content) rather than the operating conditions, the emphasis is placed on the post-combustion (secondary denitrification) measures and the most successful among them - selective catalytic (SCR) and non-catalytic reduction (SNCR). The SCR catalysts, as well as commonly used amine-based reagents (in both SCR and SNCR), are analyzed in accordance with various parameters (activity temperature domain, the location of installation and structural configuration). The special challenges for SCR and SNCR application were considered, and a comparative overview of advantages and disadvantages are given, in accordance with several different criteria. In addition, the applicability of deNOx techniques from the aspect of individual biomass combustion technology is given. Guidelines for the selection of denitrification measures are created, depending on the biomass combusted, combustion technology used, and the installation capacity.
T2  - Renewable and Sustainable Energy Reviews
T1  - Denitrification techniques for biomass combustion
VL  - 82
SP  - 3350
EP  - 3364
DO  - 10.1016/j.rser.2017.10.054
ER  - 

@article{
author = "Mladenović, Milica R. and Paprika, Milijana and Marinković, Ana D.",
year = "2018",
abstract = "In order to achieve the main Applicable combustion control systems in grate-fired bogoals of sustainable development through the harmonization of rising energy needs with environmental protection, modern society promotes the use of biomass as a renewable energy source. Biomass, like any taother fuel, emits certain pollutants from combustion, nitrogen oxides (NOx) being one of them. Control of NOx emission, originated in biomass combustion, is becoming a very significant technical challenge due to the imposition of increasingly strict emission limits. The experimental research and industrial experiences (that are not always easily available) were analyzed in order to make an overview of proven and prospective technical solutions, as well as directions for practical applications for reducing NOx emissions originating from biomass combustion. The denitrification techniques according to the broadest classification (pre-combustion, combustion control and post-combustion) have been analyzed. As the NOx emission is more strongly influenced by the nitrogen content of biomass fuels (especially of those with significant nitrogen content) rather than the operating conditions, the emphasis is placed on the post-combustion (secondary denitrification) measures and the most successful among them - selective catalytic (SCR) and non-catalytic reduction (SNCR). The SCR catalysts, as well as commonly used amine-based reagents (in both SCR and SNCR), are analyzed in accordance with various parameters (activity temperature domain, the location of installation and structural configuration). The special challenges for SCR and SNCR application were considered, and a comparative overview of advantages and disadvantages are given, in accordance with several different criteria. In addition, the applicability of deNOx techniques from the aspect of individual biomass combustion technology is given. Guidelines for the selection of denitrification measures are created, depending on the biomass combusted, combustion technology used, and the installation capacity.",
journal = "Renewable and Sustainable Energy Reviews",
title = "Denitrification techniques for biomass combustion",
volume = "82",
pages = "3350-3364",
doi = "10.1016/j.rser.2017.10.054"
}

Mladenović, M. R., Paprika, M.,& Marinković, A. D.. (2018). Denitrification techniques for biomass combustion. in Renewable and Sustainable Energy Reviews, 82, 3350-3364.
https://doi.org/10.1016/j.rser.2017.10.054

Mladenović MR, Paprika M, Marinković AD. Denitrification techniques for biomass combustion. in Renewable and Sustainable Energy Reviews. 2018;82:3350-3364.
doi:10.1016/j.rser.2017.10.054 .

Mladenović, Milica R., Paprika, Milijana, Marinković, Ana D., "Denitrification techniques for biomass combustion" in Renewable and Sustainable Energy Reviews, 82 (2018):3350-3364,
https://doi.org/10.1016/j.rser.2017.10.054 . .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Paprika, Milijana
AU  - Mladenović, Milica R.
AU  - Marinković, Ana D.
AU  - Živković, Goran S.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7696
AB  - Lately, experimental methods and numerical simulations are equally employed for the purpose of developing incineration bubbling fluidized bed (BFB) facilities. The paper presents the results of the 2-D CFD model of liquid fuel combustion in BFB, applied for numerical simulation of a fluidized bed furnace. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The proposed numerical model comprises energy equations for all three phases (gas, inert fluidized particles, and liquid fuel), as well as the transport equations of chemical components that are participating in the reactions of combustion and devolatilization. The model equations are solved applying a commercial CFD package, whereby the user submodels were developed for heterogenic fluidized bed combustion of liquid fuels and for interphase drag forces for all three phases. The results of temperature field calculation were compared with the experiments, carried out in-house, on a BFB pilot facility. The numerical experiments, based on the proposed mathematical model, have been used for the purposes of analyzing the impacts of various fuel flow rates, and fluidization numbers, on the combustion efficiency and on the temperature fields in the combustion zone.
T2  - Thermal Science
T1  - Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation
VL  - 22
IS  - 2
SP  - 1121
EP  - 1135
DO  - 10.2298/TSCI170922307N
ER  - 

@article{
author = "Nemoda, Stevan and Paprika, Milijana and Mladenović, Milica R. and Marinković, Ana D. and Živković, Goran S.",
year = "2018",
abstract = "Lately, experimental methods and numerical simulations are equally employed for the purpose of developing incineration bubbling fluidized bed (BFB) facilities. The paper presents the results of the 2-D CFD model of liquid fuel combustion in BFB, applied for numerical simulation of a fluidized bed furnace. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The proposed numerical model comprises energy equations for all three phases (gas, inert fluidized particles, and liquid fuel), as well as the transport equations of chemical components that are participating in the reactions of combustion and devolatilization. The model equations are solved applying a commercial CFD package, whereby the user submodels were developed for heterogenic fluidized bed combustion of liquid fuels and for interphase drag forces for all three phases. The results of temperature field calculation were compared with the experiments, carried out in-house, on a BFB pilot facility. The numerical experiments, based on the proposed mathematical model, have been used for the purposes of analyzing the impacts of various fuel flow rates, and fluidization numbers, on the combustion efficiency and on the temperature fields in the combustion zone.",
journal = "Thermal Science",
title = "Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation",
volume = "22",
number = "2",
pages = "1121-1135",
doi = "10.2298/TSCI170922307N"
}

Nemoda, S., Paprika, M., Mladenović, M. R., Marinković, A. D.,& Živković, G. S.. (2018). Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation. in Thermal Science, 22(2), 1121-1135.
https://doi.org/10.2298/TSCI170922307N

Nemoda S, Paprika M, Mladenović MR, Marinković AD, Živković GS. Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation. in Thermal Science. 2018;22(2):1121-1135.
doi:10.2298/TSCI170922307N .

Nemoda, Stevan, Paprika, Milijana, Mladenović, Milica R., Marinković, Ana D., Živković, Goran S., "Two-dimensional mathematical model of liquid fuel combustion in bubbling fluidized bed applied for a fluidized furnace numerical simulation" in Thermal Science, 22, no. 2 (2018):1121-1135,
https://doi.org/10.2298/TSCI170922307N . .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Mladenović, Milica
AU  - Marinković, Ana
AU  - Živković, Goran
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11169
AB  - Istraživanja vezana za razvoj sekundarnih mera denitrifikacije dimnih gasova
sagorevanja agrarne biomase su sve aktuelnija zbog sve intenzivnije primene ovog
obnovljivog goriva i pospešivanja održivog razvoja, odnosno smanjenja potrošnje fosilnih
goriva. Pri tome agrarna biomasa kao gorivo, pored niza prednosti, ima važan nedostatak
zbog značajne emisije azotnih oksida. U radu se u prvom redu analiziraju hemijske reakcije
selektivne nekalitičke redukcije azot-monoksida primenom amonijaka kao reagensa.
Analiziraju se dva kinetička modela, jedan krajnje uprošćen, koji uzima u obzir samo dve
neto reakcije i složeniji sa sedam hemijskih reakcija. Razmatrani hemijsko-kinetički modeli
su inkorporirani u sveobuhvatni CFD model složenih procesa u eksperimentalnoj
denitrifikacionoj komori za simuliranje procesa industrijske denitrifikacije. Pri tome je
obavljena sveobuhvatna analiza procesa, koja uključuje simulaciju strujanja, mešanja
komponenti i praćenje lokalnih hemijskih reakcija. Rezultati numeričke simulacije procesa
u eksperimentalnoj denitrifikacionoj komori su poređeni sa eksperimentima iz literature,
kao i sa rezultatima modela drugih autora. Pri tome su obezbeđeni isti granični uslovi
odvijanja razmatranih procesa, tj ulazne koncetracije komponenta su: 300 ppm NH3, 300
ppm NO, 4.0% O2, 4.5% H2O, a vreme boravka reaktanata u komori je 150 ms.
Ključne reči: biomasa, sagorevanje, emisija azotnih oksida, denitrifikacija.
AB  - Research related to the development of secondary measures of denitrification of agrarian biomass combustion gases is becoming more and more actual due to the increasingly intensive application of this renewable fuel and the promotion of sustainable development, ie, the reduction of consumption of fossil fuels. Thereby, in spite of a number of advantages, agrarian biomass has an important disadvantage due to significant emissions of nitrogen oxides. The paper deals primarily with the chemical reactions of selective noncatalytic reduction of nitrogen monoxide using ammonia as a reagent. Two kinetic models, one rather simplistic, which takes into account only two net reactions and other, more complex with seven chemical reactions, are analyzed. The considered chemicalkinetic models are incorporated into a comprehensive CFD model of complex processes in an experimental denitrification chamber. The CFD model was included flow simulation, components mixing and monitoring of local chemical reactions. The results of presented numerical simulation were compared with literature experiments, as well as with the results of other authors' models. The same boundary conditions of the considered processes are provided, i.e. the input concentrations of the component are: 300 ppm NH3, 300 ppm NO, 4.0% O2, 4.5% H2O, and the residence time of the reactants in the chamber is 150 ms.
T2  - Savremena poljoprivredna tehnika
T1  - The application of chemical kinetic models in numerical simulation of the process of non-catalitic reduction of NOX with amonia in biomass combustion products
VL  - 44
IS  - 1
SP  - 37
EP  - 44
DO  - 10.5937/SavPoljTeh1801037N
ER  - 

@article{
author = "Nemoda, Stevan and Mladenović, Milica and Marinković, Ana and Živković, Goran",
year = "2018",
abstract = "Istraživanja vezana za razvoj sekundarnih mera denitrifikacije dimnih gasova
sagorevanja agrarne biomase su sve aktuelnija zbog sve intenzivnije primene ovog
obnovljivog goriva i pospešivanja održivog razvoja, odnosno smanjenja potrošnje fosilnih
goriva. Pri tome agrarna biomasa kao gorivo, pored niza prednosti, ima važan nedostatak
zbog značajne emisije azotnih oksida. U radu se u prvom redu analiziraju hemijske reakcije
selektivne nekalitičke redukcije azot-monoksida primenom amonijaka kao reagensa.
Analiziraju se dva kinetička modela, jedan krajnje uprošćen, koji uzima u obzir samo dve
neto reakcije i složeniji sa sedam hemijskih reakcija. Razmatrani hemijsko-kinetički modeli
su inkorporirani u sveobuhvatni CFD model složenih procesa u eksperimentalnoj
denitrifikacionoj komori za simuliranje procesa industrijske denitrifikacije. Pri tome je
obavljena sveobuhvatna analiza procesa, koja uključuje simulaciju strujanja, mešanja
komponenti i praćenje lokalnih hemijskih reakcija. Rezultati numeričke simulacije procesa
u eksperimentalnoj denitrifikacionoj komori su poređeni sa eksperimentima iz literature,
kao i sa rezultatima modela drugih autora. Pri tome su obezbeđeni isti granični uslovi
odvijanja razmatranih procesa, tj ulazne koncetracije komponenta su: 300 ppm NH3, 300
ppm NO, 4.0% O2, 4.5% H2O, a vreme boravka reaktanata u komori je 150 ms.
Ključne reči: biomasa, sagorevanje, emisija azotnih oksida, denitrifikacija., Research related to the development of secondary measures of denitrification of agrarian biomass combustion gases is becoming more and more actual due to the increasingly intensive application of this renewable fuel and the promotion of sustainable development, ie, the reduction of consumption of fossil fuels. Thereby, in spite of a number of advantages, agrarian biomass has an important disadvantage due to significant emissions of nitrogen oxides. The paper deals primarily with the chemical reactions of selective noncatalytic reduction of nitrogen monoxide using ammonia as a reagent. Two kinetic models, one rather simplistic, which takes into account only two net reactions and other, more complex with seven chemical reactions, are analyzed. The considered chemicalkinetic models are incorporated into a comprehensive CFD model of complex processes in an experimental denitrification chamber. The CFD model was included flow simulation, components mixing and monitoring of local chemical reactions. The results of presented numerical simulation were compared with literature experiments, as well as with the results of other authors' models. The same boundary conditions of the considered processes are provided, i.e. the input concentrations of the component are: 300 ppm NH3, 300 ppm NO, 4.0% O2, 4.5% H2O, and the residence time of the reactants in the chamber is 150 ms.",
journal = "Savremena poljoprivredna tehnika",
title = "The application of chemical kinetic models in numerical simulation of the process of non-catalitic reduction of NOX with amonia in biomass combustion products",
volume = "44",
number = "1",
pages = "37-44",
doi = "10.5937/SavPoljTeh1801037N"
}

Nemoda, S., Mladenović, M., Marinković, A.,& Živković, G.. (2018). The application of chemical kinetic models in numerical simulation of the process of non-catalitic reduction of NOX with amonia in biomass combustion products. in Savremena poljoprivredna tehnika, 44(1), 37-44.
https://doi.org/10.5937/SavPoljTeh1801037N

Nemoda S, Mladenović M, Marinković A, Živković G. The application of chemical kinetic models in numerical simulation of the process of non-catalitic reduction of NOX with amonia in biomass combustion products. in Savremena poljoprivredna tehnika. 2018;44(1):37-44.
doi:10.5937/SavPoljTeh1801037N .

Nemoda, Stevan, Mladenović, Milica, Marinković, Ana, Živković, Goran, "The application of chemical kinetic models in numerical simulation of the process of non-catalitic reduction of NOX with amonia in biomass combustion products" in Savremena poljoprivredna tehnika, 44, no. 1 (2018):37-44,
https://doi.org/10.5937/SavPoljTeh1801037N . .

TY  - CONF
AU  - Mladenović, Milica
AU  - Marinković, Ana
AU  - Paprika, Milijana
AU  - Repić, Branislav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11600
AB  - Iako se sagorevanje biomase promoviše sa stanovišta očuvanja životne sredine zbog značajno manje emisije štetnih gasova nego pri sagorevanju najzastupljenijeg domaćeg fosilnog goriva-uglja, eksperimenti sagorevanja više tipova biomase su pokazali da se i ovim sagorevanjem emituje izvesna količina polutanata koju je potrebno kontrolisati. Emisija azotnih oksida (NOx) je jedan od najvećih izazova u tom pogledu. Poznavanje i kontrolisanje emisije ovih oksida prilikom sagorevanja biomase je neophodno radi uspostavljanja korektnih zakonskih normi u pogledu granične emisije i za razvoj što kvalitetnijih tehnologija za sagorevanje ove vrste goriva. U tom cilju u radu je dat opis eksperimentalne aparature, koja ima za cilj da ispita efikasan način za redukciju NOx-a u dimnim gasovima upotrebom sekundarnih mera denitrifikacije. Takođe su dati i termički proračuni parametara sagorevanja u eksperimentalnom adijabatskom ložištu.
AB  - Even though biomass combustion is promoted from the standpoint of environmental protection due to significantly lower emissions in comparison to combustion of the predominate domestic fossil fuel –coal, combustion experiments with several types of biomass showed that the combustion emits a certain amount of pollutants which needs to be controlled. Emissions of nitrogen oxides (NOx) is one of the biggest challenges in this regard. Knowing and controlling the emissions of these oxides during the combustion ofbiomass is required for correct establishment of legal norms in terms of the emis-sions limits and to develop better technologies for combustion of these fuels. In that sense, the paper gives a description of the new experimental apparatus, which aims to explore an effective way to re-duce NOx in the exhaust gas, using the secondary denitrification methods. The calculation of the main combustion parameters in the experimental adiabatic furnace are also given here
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova
T1  - Eksperimentalna aparatura za simulaciju sagorevanja biomase i kontrolu azotnih oksida
T1  - Experimental apparatus for simulation of biomass combustion and control of nitrogen oxide
SP  - 175
EP  - 182
DO  - 10.24094/ptk.017.30.1.175
ER  - 

@conference{
author = "Mladenović, Milica and Marinković, Ana and Paprika, Milijana and Repić, Branislav",
year = "2017",
abstract = "Iako se sagorevanje biomase promoviše sa stanovišta očuvanja životne sredine zbog značajno manje emisije štetnih gasova nego pri sagorevanju najzastupljenijeg domaćeg fosilnog goriva-uglja, eksperimenti sagorevanja više tipova biomase su pokazali da se i ovim sagorevanjem emituje izvesna količina polutanata koju je potrebno kontrolisati. Emisija azotnih oksida (NOx) je jedan od najvećih izazova u tom pogledu. Poznavanje i kontrolisanje emisije ovih oksida prilikom sagorevanja biomase je neophodno radi uspostavljanja korektnih zakonskih normi u pogledu granične emisije i za razvoj što kvalitetnijih tehnologija za sagorevanje ove vrste goriva. U tom cilju u radu je dat opis eksperimentalne aparature, koja ima za cilj da ispita efikasan način za redukciju NOx-a u dimnim gasovima upotrebom sekundarnih mera denitrifikacije. Takođe su dati i termički proračuni parametara sagorevanja u eksperimentalnom adijabatskom ložištu., Even though biomass combustion is promoted from the standpoint of environmental protection due to significantly lower emissions in comparison to combustion of the predominate domestic fossil fuel –coal, combustion experiments with several types of biomass showed that the combustion emits a certain amount of pollutants which needs to be controlled. Emissions of nitrogen oxides (NOx) is one of the biggest challenges in this regard. Knowing and controlling the emissions of these oxides during the combustion ofbiomass is required for correct establishment of legal norms in terms of the emis-sions limits and to develop better technologies for combustion of these fuels. In that sense, the paper gives a description of the new experimental apparatus, which aims to explore an effective way to re-duce NOx in the exhaust gas, using the secondary denitrification methods. The calculation of the main combustion parameters in the experimental adiabatic furnace are also given here",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova",
title = "Eksperimentalna aparatura za simulaciju sagorevanja biomase i kontrolu azotnih oksida, Experimental apparatus for simulation of biomass combustion and control of nitrogen oxide",
pages = "175-182",
doi = "10.24094/ptk.017.30.1.175"
}

Mladenović, M., Marinković, A., Paprika, M.,& Repić, B.. (2017). Eksperimentalna aparatura za simulaciju sagorevanja biomase i kontrolu azotnih oksida. in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 175-182.
https://doi.org/10.24094/ptk.017.30.1.175

Mladenović M, Marinković A, Paprika M, Repić B. Eksperimentalna aparatura za simulaciju sagorevanja biomase i kontrolu azotnih oksida. in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova. 2017;:175-182.
doi:10.24094/ptk.017.30.1.175 .

Mladenović, Milica, Marinković, Ana, Paprika, Milijana, Repić, Branislav, "Eksperimentalna aparatura za simulaciju sagorevanja biomase i kontrolu azotnih oksida" in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova (2017):175-182,
https://doi.org/10.24094/ptk.017.30.1.175 . .

TY  - CONF
AU  - Nemoda, Stevan
AU  - Mladenović, Milica
AU  - Paprika, Milijana
AU  - Repić, Branislav
AU  - Marinković, Ana
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11601
AB  - U radu je predložen dvodimenzijski model numeričke simulacije sagorevanja tečnih goriva u flu-idizovanom sloju, koji se zasniva na dvo fluidnom Euler – Euler pristupom modeliranja fluidizovanog sloja uz određivanje polja brzina gasa i čestica u dvofaznim, granularnim tokovima zasnovane na ana-logiji sa kinetičkom teorijom gasova (KTGF). Sveobuhvatan model kompleksnih procesa u fluidizacio-noj komori sagorevanja podrazumeva, pored određivanja polja brzina gasne i čestične faze, inkorpori-ranje energetskih jednačina gasne i čestične faze, kao i transportnih jednačina hemijskih komponenti sa izvornim članovima usled konverzije komponenata. Brojni numerički eksperimenti pokazuju da je izbor koeficijenata u izrazima za sile trenja prilikom interakcije faza ima izuzetan značaj i mora se sprovesti za svaki, značajno različit režim fluidizacije, posebno. Urađene su serije numeričkih eksperi-menata sa simulacijom procesa sagorevanja u FS sa i bez značajnog sadržaja vode u gorivu. Proračuni su nestacionarni, a modelirani vremenski period odgovara vremenu za koje gas prođe kroz celu visinu reaktora. Numerički eksperimenti, na osnovu predloženog matematičkog modela, su takođe korišćeni za potrebe analize uticaja različitih snaga pri kojima radi reaktor, kao i različitih stepena fluidizacije, na efikasnost sagorevanja kao i na profile temperatura u zoni sagorevanja.
AB  - A comprehensive 2D numerical model of the bubbled fluidized bed with combustion of liquid fuelsis proposed in the paper. The proposed numerical model is based on the Eulerian–Eulerian granular flow modeling with the kinetic theory of granular flow. The model includes the following basic governing equations: the continuity equations of the solid andgas phase, the momentum conservation equations of the gas and solid phase, the energy equations of gas, and the solid phase and conservation equations for chemical components. The choice of the semi empirical constants of the inter-phase interaction drag force model is significant and these constants must be adjusted for each particular regime of fluidiza-tion. Presented numerical experiments primarily were applied to verification of the assumptions about the impact of water content in a liquid fuel on FB combustion intensity. The numerical experiments, based on the proposed mathematical model, also have been used for the purposes of analyzing the im-pacts of various reactor powers as well as fluidization numbers, on the combustion efficiency and on combustion zone temperature fields
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova
T1  - 2D CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Euler-Euler granularnom modelu
T1  - 2D fluidized combustion chamber cfd simulation based on Euler-Euler granular flow model
SP  - 277
EP  - 288
DO  - 10.24094//ptk.017.30.1.277
ER  - 

@conference{
author = "Nemoda, Stevan and Mladenović, Milica and Paprika, Milijana and Repić, Branislav and Marinković, Ana",
year = "2017",
abstract = "U radu je predložen dvodimenzijski model numeričke simulacije sagorevanja tečnih goriva u flu-idizovanom sloju, koji se zasniva na dvo fluidnom Euler – Euler pristupom modeliranja fluidizovanog sloja uz određivanje polja brzina gasa i čestica u dvofaznim, granularnim tokovima zasnovane na ana-logiji sa kinetičkom teorijom gasova (KTGF). Sveobuhvatan model kompleksnih procesa u fluidizacio-noj komori sagorevanja podrazumeva, pored određivanja polja brzina gasne i čestične faze, inkorpori-ranje energetskih jednačina gasne i čestične faze, kao i transportnih jednačina hemijskih komponenti sa izvornim članovima usled konverzije komponenata. Brojni numerički eksperimenti pokazuju da je izbor koeficijenata u izrazima za sile trenja prilikom interakcije faza ima izuzetan značaj i mora se sprovesti za svaki, značajno različit režim fluidizacije, posebno. Urađene su serije numeričkih eksperi-menata sa simulacijom procesa sagorevanja u FS sa i bez značajnog sadržaja vode u gorivu. Proračuni su nestacionarni, a modelirani vremenski period odgovara vremenu za koje gas prođe kroz celu visinu reaktora. Numerički eksperimenti, na osnovu predloženog matematičkog modela, su takođe korišćeni za potrebe analize uticaja različitih snaga pri kojima radi reaktor, kao i različitih stepena fluidizacije, na efikasnost sagorevanja kao i na profile temperatura u zoni sagorevanja., A comprehensive 2D numerical model of the bubbled fluidized bed with combustion of liquid fuelsis proposed in the paper. The proposed numerical model is based on the Eulerian–Eulerian granular flow modeling with the kinetic theory of granular flow. The model includes the following basic governing equations: the continuity equations of the solid andgas phase, the momentum conservation equations of the gas and solid phase, the energy equations of gas, and the solid phase and conservation equations for chemical components. The choice of the semi empirical constants of the inter-phase interaction drag force model is significant and these constants must be adjusted for each particular regime of fluidiza-tion. Presented numerical experiments primarily were applied to verification of the assumptions about the impact of water content in a liquid fuel on FB combustion intensity. The numerical experiments, based on the proposed mathematical model, also have been used for the purposes of analyzing the im-pacts of various reactor powers as well as fluidization numbers, on the combustion efficiency and on combustion zone temperature fields",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova",
title = "2D CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Euler-Euler granularnom modelu, 2D fluidized combustion chamber cfd simulation based on Euler-Euler granular flow model",
pages = "277-288",
doi = "10.24094//ptk.017.30.1.277"
}

Nemoda, S., Mladenović, M., Paprika, M., Repić, B.,& Marinković, A.. (2017). 2D CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Euler-Euler granularnom modelu. in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 277-288.
https://doi.org/10.24094//ptk.017.30.1.277

Nemoda S, Mladenović M, Paprika M, Repić B, Marinković A. 2D CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Euler-Euler granularnom modelu. in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova. 2017;:277-288.
doi:10.24094//ptk.017.30.1.277 .

Nemoda, Stevan, Mladenović, Milica, Paprika, Milijana, Repić, Branislav, Marinković, Ana, "2D CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Euler-Euler granularnom modelu" in 30. Međunarodni kongres o procesnoj industriji - PROCESING ′17 : zbornik radova (2017):277-288,
https://doi.org/10.24094//ptk.017.30.1.277 . .

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Paprika, Milijana
AU  - Komatina, Mirko S.
AU  - Repić, Branislav
AU  - Erić, Aleksandar
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1199
AB  - Harmonization of environmental protection and the growing energy needs of modern society promote the biomass application as a replacement for fossil fuels and a viable option to mitigate the greenhouse gas emissions. For domestic conditions this is particularly important as more than 60% of renewables belongs to biomass. Beside numerous benefits of using biomass for energy purposes, there are certain drawbacks, one of which is a possible high emission of NOx during the combustion of these fuels. The paper presents the results of the experiments with multiple biomass types (soybean straw, cornstalk, grain biomass, sunflower oil, glycerin and paper sludge), using different combustion technologies (fluidized bed and cigarette combustion), with emphasis on the emission of NOx in the exhaust gas. A presentation of the experimental installations is given, as well as an evaluation of the effects of the fuel composition, combustion regimes and technology on the NOx emissions. As the biomass combustion took place at temperatures low enough that thermal and prompt NOx can be neglected, the conclusion is the emissions of nitrogen oxides primarily depend on the biomass composition - it is increasing with the increase of the nitrogen content, and decreases with the increase of the char content which provides catalytic surface for NOx reduction by CO.
T2  - Hemijska industrija
T1  - The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide
VL  - 70
IS  - 3
SP  - 287
EP  - 298
DO  - 10.2298/HEMIND150409033M
ER  - 

@article{
author = "Mladenović, Milica R. and Dakić, Dragoljub V. and Nemoda, Stevan and Paprika, Milijana and Komatina, Mirko S. and Repić, Branislav and Erić, Aleksandar",
year = "2016",
abstract = "Harmonization of environmental protection and the growing energy needs of modern society promote the biomass application as a replacement for fossil fuels and a viable option to mitigate the greenhouse gas emissions. For domestic conditions this is particularly important as more than 60% of renewables belongs to biomass. Beside numerous benefits of using biomass for energy purposes, there are certain drawbacks, one of which is a possible high emission of NOx during the combustion of these fuels. The paper presents the results of the experiments with multiple biomass types (soybean straw, cornstalk, grain biomass, sunflower oil, glycerin and paper sludge), using different combustion technologies (fluidized bed and cigarette combustion), with emphasis on the emission of NOx in the exhaust gas. A presentation of the experimental installations is given, as well as an evaluation of the effects of the fuel composition, combustion regimes and technology on the NOx emissions. As the biomass combustion took place at temperatures low enough that thermal and prompt NOx can be neglected, the conclusion is the emissions of nitrogen oxides primarily depend on the biomass composition - it is increasing with the increase of the nitrogen content, and decreases with the increase of the char content which provides catalytic surface for NOx reduction by CO.",
journal = "Hemijska industrija",
title = "The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide",
volume = "70",
number = "3",
pages = "287-298",
doi = "10.2298/HEMIND150409033M"
}

Mladenović, M. R., Dakić, D. V., Nemoda, S., Paprika, M., Komatina, M. S., Repić, B.,& Erić, A.. (2016). The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide. in Hemijska industrija, 70(3), 287-298.
https://doi.org/10.2298/HEMIND150409033M

Mladenović MR, Dakić DV, Nemoda S, Paprika M, Komatina MS, Repić B, Erić A. The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide. in Hemijska industrija. 2016;70(3):287-298.
doi:10.2298/HEMIND150409033M .

Mladenović, Milica R., Dakić, Dragoljub V., Nemoda, Stevan, Paprika, Milijana, Komatina, Mirko S., Repić, Branislav, Erić, Aleksandar, "The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide" in Hemijska industrija, 70, no. 3 (2016):287-298,
https://doi.org/10.2298/HEMIND150409033M . .

TY  - JOUR
AU  - Paprika, Milijana
AU  - Komatina, Mirko S.
AU  - Mladenović, Milica R.
AU  - Živković, Goran S.
AU  - Dakić, Dragoljub V.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1139
AB  - In order to lay a foundation of a credible primacy fragmentation model, a theoretical analysis of the thermo-mechanical processes in a devolatilizing solid fuel particle was carried out. The devolatilization model comprises heat transfer, chemical processes of generation of gaseous products of combustion (volatiles), volatile transfer, and solid mechanic processes. A spatial and temporal analysis of the stresses within the particle showed that the radial stress is caused primarily by the pressure of generated volatiles. This stress monotonously decreases from the particle center towards the particle surface, without changing its sign. The tangential stress is caused primarily by the thermal shock. Close to the surface, it changes its sign. In the particle cross-section, the radial stress prevails close to the particle center, whilst the tangential stress is dominant in the surface region. At the points where these stresses exceed the particle tensile strength, cracks occur. Cracks extend tangentially close to the surface, and radially close to the center of the particle.
T2  - Thermal Science
T1  - Mechanism of Primary Fragmentation of Coal in Fluidized Bed
VL  - 20
SP  - S125
EP  - S132
DO  - 10.2298/TSCI150603224P
ER  - 

@article{
author = "Paprika, Milijana and Komatina, Mirko S. and Mladenović, Milica R. and Živković, Goran S. and Dakić, Dragoljub V.",
year = "2016",
abstract = "In order to lay a foundation of a credible primacy fragmentation model, a theoretical analysis of the thermo-mechanical processes in a devolatilizing solid fuel particle was carried out. The devolatilization model comprises heat transfer, chemical processes of generation of gaseous products of combustion (volatiles), volatile transfer, and solid mechanic processes. A spatial and temporal analysis of the stresses within the particle showed that the radial stress is caused primarily by the pressure of generated volatiles. This stress monotonously decreases from the particle center towards the particle surface, without changing its sign. The tangential stress is caused primarily by the thermal shock. Close to the surface, it changes its sign. In the particle cross-section, the radial stress prevails close to the particle center, whilst the tangential stress is dominant in the surface region. At the points where these stresses exceed the particle tensile strength, cracks occur. Cracks extend tangentially close to the surface, and radially close to the center of the particle.",
journal = "Thermal Science",
title = "Mechanism of Primary Fragmentation of Coal in Fluidized Bed",
volume = "20",
pages = "S125-S132",
doi = "10.2298/TSCI150603224P"
}

Paprika, M., Komatina, M. S., Mladenović, M. R., Živković, G. S.,& Dakić, D. V.. (2016). Mechanism of Primary Fragmentation of Coal in Fluidized Bed. in Thermal Science, 20, S125-S132.
https://doi.org/10.2298/TSCI150603224P

Paprika M, Komatina MS, Mladenović MR, Živković GS, Dakić DV. Mechanism of Primary Fragmentation of Coal in Fluidized Bed. in Thermal Science. 2016;20:S125-S132.
doi:10.2298/TSCI150603224P .

Paprika, Milijana, Komatina, Mirko S., Mladenović, Milica R., Živković, Goran S., Dakić, Dragoljub V., "Mechanism of Primary Fragmentation of Coal in Fluidized Bed" in Thermal Science, 20 (2016):S125-S132,
https://doi.org/10.2298/TSCI150603224P . .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Erić, Aleksandar
AU  - Grubor, Borislav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1140
AB  - The paper presents a 2-D CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking into account also the third liquid phase, as well as its interaction with the solid and gas phase. The proposed numerical model comprise energy equations for all three phases, as well as the transport equations of chemical components with source terms originated from the component conversion. In the frame of the proposed model, user sub-models were developed for heterogenic fluidized bed combustion of liquid fuels, with or without water. The results of the calculation were compared with experiments on a pilot-facility (power up to 100 kW), combusting, among other fuels, oil. The temperature profiles along the combustion chamber were compared for the two basic cases: combustion with or without water. On the basis of numerical experiments, influence of the fluid-dynamic characteristics of the fluidized bed on the combustion efficiency was analyzed, as well as the influence of the fuel characteristics (reactivity, water content) on the intensive combustion zone.
T2  - Thermal Science
T1  - Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed
VL  - 20
SP  - S133
EP  - S149
DO  - 10.2298/TSCI151025196N
ER  - 

@article{
author = "Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Erić, Aleksandar and Grubor, Borislav",
year = "2016",
abstract = "The paper presents a 2-D CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking into account also the third liquid phase, as well as its interaction with the solid and gas phase. The proposed numerical model comprise energy equations for all three phases, as well as the transport equations of chemical components with source terms originated from the component conversion. In the frame of the proposed model, user sub-models were developed for heterogenic fluidized bed combustion of liquid fuels, with or without water. The results of the calculation were compared with experiments on a pilot-facility (power up to 100 kW), combusting, among other fuels, oil. The temperature profiles along the combustion chamber were compared for the two basic cases: combustion with or without water. On the basis of numerical experiments, influence of the fluid-dynamic characteristics of the fluidized bed on the combustion efficiency was analyzed, as well as the influence of the fuel characteristics (reactivity, water content) on the intensive combustion zone.",
journal = "Thermal Science",
title = "Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed",
volume = "20",
pages = "S133-S149",
doi = "10.2298/TSCI151025196N"
}

Nemoda, S., Mladenović, M. R., Paprika, M., Erić, A.,& Grubor, B.. (2016). Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed. in Thermal Science, 20, S133-S149.
https://doi.org/10.2298/TSCI151025196N

Nemoda S, Mladenović MR, Paprika M, Erić A, Grubor B. Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed. in Thermal Science. 2016;20:S133-S149.
doi:10.2298/TSCI151025196N .

Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Erić, Aleksandar, Grubor, Borislav, "Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed" in Thermal Science, 20 (2016):S133-S149,
https://doi.org/10.2298/TSCI151025196N . .

TY  - JOUR
AU  - Rudonja, Nedzad R.
AU  - Komatina, Mirko S.
AU  - Živković, Goran S.
AU  - Antonijević, Dragi Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1148
AB  - Enhancement of heat transfer over a cylinder shaped thermal energy storage filled by paraffin E53 by use of longitudinal rectangular copper fins was analyzed. The thermo-physical features of the storage material are determined in separate experiments and implemented to FLUENT software over user defined function. Advanced thermal storage geometry comprehension and optimization required introduction of a parameter suitable for the analysis of heat transfer enhancement, so the ratio of heat transfer surfaces as a factor was proposed and applied. It is revealed that increase of the ratio of heat transfer surfaces leads to the decrease of melting time and vice versa. Numerical analysis, employing the 3-D model built in Ansys software, observed storage reservoir geometries with variable number of longitudinal fins. The adjusted set of boundary conditions was carried out and both written in C language and implemented over user defined function in order to define variable heat flux along the height of the heater. The comparison of acquired numerical and experimental results showed a strong correlation. Experimental validation of numerical results was done on the real thermal energy storage apparatus.
T2  - Thermal Science
T1  - Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins
VL  - 20
SP  - S251
EP  - S259
DO  - 10.2298/TSCI150729136R
ER  - 

@article{
author = "Rudonja, Nedzad R. and Komatina, Mirko S. and Živković, Goran S. and Antonijević, Dragi Lj.",
year = "2016",
abstract = "Enhancement of heat transfer over a cylinder shaped thermal energy storage filled by paraffin E53 by use of longitudinal rectangular copper fins was analyzed. The thermo-physical features of the storage material are determined in separate experiments and implemented to FLUENT software over user defined function. Advanced thermal storage geometry comprehension and optimization required introduction of a parameter suitable for the analysis of heat transfer enhancement, so the ratio of heat transfer surfaces as a factor was proposed and applied. It is revealed that increase of the ratio of heat transfer surfaces leads to the decrease of melting time and vice versa. Numerical analysis, employing the 3-D model built in Ansys software, observed storage reservoir geometries with variable number of longitudinal fins. The adjusted set of boundary conditions was carried out and both written in C language and implemented over user defined function in order to define variable heat flux along the height of the heater. The comparison of acquired numerical and experimental results showed a strong correlation. Experimental validation of numerical results was done on the real thermal energy storage apparatus.",
journal = "Thermal Science",
title = "Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins",
volume = "20",
pages = "S251-S259",
doi = "10.2298/TSCI150729136R"
}

Rudonja, N. R., Komatina, M. S., Živković, G. S.,& Antonijević, D. Lj.. (2016). Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins. in Thermal Science, 20, S251-S259.
https://doi.org/10.2298/TSCI150729136R

Rudonja NR, Komatina MS, Živković GS, Antonijević DL. Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins. in Thermal Science. 2016;20:S251-S259.
doi:10.2298/TSCI150729136R .

Rudonja, Nedzad R., Komatina, Mirko S., Živković, Goran S., Antonijević, Dragi Lj., "Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins" in Thermal Science, 20 (2016):S251-S259,
https://doi.org/10.2298/TSCI150729136R . .

TY  - JOUR
AU  - Rudonja, Nedzad R.
AU  - Komatina, Mirko S.
AU  - Antonijević, Dragi Lj.
AU  - Živković, Goran S.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7151
AB  - Precise understanding of heat transfer processes inside the latent thermal energy storage exposed to different initial and boundary conditions is crucial for development of optimized design and operating features of similar devices. The paper presents 3D numerical study of phase change material heat storage in the shape of vertical cylinder reservoir with axially placed heat source/sink equipped with variable number of conductance enhancing longitudinal rectangular fins. As the principally important observed is the case of vertically variable heat flux supplied to the phase change material during the melting process. The numerical modeling is based on the physical model of the process and is being carried out by Fluent software that uses finite volume method for solving continuity, momentum and energy equations. The coupling between pressure and velocity is based on the Semi- Implicit Pressure- Linked Equation (SIMPLE) algorithm. The results of numerical simulations are verified through the comparison with the own experimental results. Exemplary results for characteristic heat storage geometries and boundary conditions are presented and analyzed in the paper.
T2  - Bulgarian Chemical Communications
T1  - Numerical simulation of latent heat storage with conductance enhancing fins
VL  - 48
SP  - 199
EP  - 205
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7151
ER  - 

@article{
author = "Rudonja, Nedzad R. and Komatina, Mirko S. and Antonijević, Dragi Lj. and Živković, Goran S.",
year = "2016",
abstract = "Precise understanding of heat transfer processes inside the latent thermal energy storage exposed to different initial and boundary conditions is crucial for development of optimized design and operating features of similar devices. The paper presents 3D numerical study of phase change material heat storage in the shape of vertical cylinder reservoir with axially placed heat source/sink equipped with variable number of conductance enhancing longitudinal rectangular fins. As the principally important observed is the case of vertically variable heat flux supplied to the phase change material during the melting process. The numerical modeling is based on the physical model of the process and is being carried out by Fluent software that uses finite volume method for solving continuity, momentum and energy equations. The coupling between pressure and velocity is based on the Semi- Implicit Pressure- Linked Equation (SIMPLE) algorithm. The results of numerical simulations are verified through the comparison with the own experimental results. Exemplary results for characteristic heat storage geometries and boundary conditions are presented and analyzed in the paper.",
journal = "Bulgarian Chemical Communications",
title = "Numerical simulation of latent heat storage with conductance enhancing fins",
volume = "48",
pages = "199-205",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7151"
}

Rudonja, N. R., Komatina, M. S., Antonijević, D. Lj.,& Živković, G. S.. (2016). Numerical simulation of latent heat storage with conductance enhancing fins. in Bulgarian Chemical Communications, 48, 199-205.
https://hdl.handle.net/21.15107/rcub_vinar_7151

Rudonja NR, Komatina MS, Antonijević DL, Živković GS. Numerical simulation of latent heat storage with conductance enhancing fins. in Bulgarian Chemical Communications. 2016;48:199-205.
https://hdl.handle.net/21.15107/rcub_vinar_7151 .

Rudonja, Nedzad R., Komatina, Mirko S., Antonijević, Dragi Lj., Živković, Goran S., "Numerical simulation of latent heat storage with conductance enhancing fins" in Bulgarian Chemical Communications, 48 (2016):199-205,
https://hdl.handle.net/21.15107/rcub_vinar_7151 .

TY  - CONF
AU  - Mladenović, Milica
AU  - Paprika, Milijana
AU  - Marinković, Ana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11603
AB  - Usklađivanje potreba očuvanja životne sredine i rastućih energetskih potreba savremenog društva promoviše primenu biomase kao zamene za fosilna goriva i održivu opciju za ublažavanje emisije gasova staklene bašte. Poredniza prednosti upotrebe biomase u energetske svrhe, postoje i izvesni nedostaci, od kojih je i moguća relativno visoka emisija azotnih oksida, NOx prilikom sagorevanje ove vrste goriva. U radu su predstavljene mere denitrifikacije pri sagorevanju biomase - primarne i sekundarne. Akcenat u radu je stavljen na sekundarne mere denitrifikacije.
AB  - Aligning the need to preserve the environment and the growing energy needs of modern society promotes the use of biomass as a replacement for fossil fuels and viable option to mitigate greenhouse gas emissions. Besides a number of advantages of using biomass for energy purposes, there are certain disadvantages, one of which is possible relatively high emissions of nitrogen oxides, NOx, during the combustion of these fuels. The paper presents the denitrification measures during combustion of biomass - primary and secondary. The emphasis in this paper is placed on the secondary denitrification measures.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova
T1  - Mere denitrifikacije pri sagorevanju biomase
T1  - Denitrification measures in biomass combustion
SP  - 173
EP  - 185
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11603
ER  - 

@conference{
author = "Mladenović, Milica and Paprika, Milijana and Marinković, Ana",
year = "2016",
abstract = "Usklađivanje potreba očuvanja životne sredine i rastućih energetskih potreba savremenog društva promoviše primenu biomase kao zamene za fosilna goriva i održivu opciju za ublažavanje emisije gasova staklene bašte. Poredniza prednosti upotrebe biomase u energetske svrhe, postoje i izvesni nedostaci, od kojih je i moguća relativno visoka emisija azotnih oksida, NOx prilikom sagorevanje ove vrste goriva. U radu su predstavljene mere denitrifikacije pri sagorevanju biomase - primarne i sekundarne. Akcenat u radu je stavljen na sekundarne mere denitrifikacije., Aligning the need to preserve the environment and the growing energy needs of modern society promotes the use of biomass as a replacement for fossil fuels and viable option to mitigate greenhouse gas emissions. Besides a number of advantages of using biomass for energy purposes, there are certain disadvantages, one of which is possible relatively high emissions of nitrogen oxides, NOx, during the combustion of these fuels. The paper presents the denitrification measures during combustion of biomass - primary and secondary. The emphasis in this paper is placed on the secondary denitrification measures.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova",
title = "Mere denitrifikacije pri sagorevanju biomase, Denitrification measures in biomass combustion",
pages = "173-185",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11603"
}

Mladenović, M., Paprika, M.,& Marinković, A.. (2016). Mere denitrifikacije pri sagorevanju biomase. in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 173-185.
https://hdl.handle.net/21.15107/rcub_vinar_11603

Mladenović M, Paprika M, Marinković A. Mere denitrifikacije pri sagorevanju biomase. in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova. 2016;:173-185.
https://hdl.handle.net/21.15107/rcub_vinar_11603 .

Mladenović, Milica, Paprika, Milijana, Marinković, Ana, "Mere denitrifikacije pri sagorevanju biomase" in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova (2016):173-185,
https://hdl.handle.net/21.15107/rcub_vinar_11603 .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Nemoda, Stevan
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
AU  - Đurović, Dejan M.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1141
AB  - The paper presents results of experimental and numerical investigation addressing combustion of baled agricultural biomass in a 50 kW experimental furnace equipped with cigar burners. Experiments performed included measurements of all parameters deemed important for mass and energy balance, as well as parameters defining quality of the combustion process. Experimental results were compared with results of numerical simulations performed with previously developed CFD model. The model takes into account complex thermo mechanical combustion processes occurring in a porous layer of biomass bales and the surrounding fluid. The combustion process and the corresponding model were deemed stationary. Comparison of experimental and numerical results obtained through research presented in this paper showed satisfactory correspondence, leading to the conclusion that the model developed could be used for analysis of different effects associated with variations in process parameters and/or structural modifications in industrial biomass facilities. Mathematical model developed was also utilized to examine the impact of gas re-circulation on maximum temperatures in the combustion chamber. Gas re-circulation was found to have positive effect on the reduction of maximum temperature in the combustion chamber, as well as on the reduction of maximum temperature zone in the chamber. The conclusions made provided valuable inputs towards prevention of biomass ash sintering, which occurs at higher temperatures and negatively affects biomass combustion process.
T2  - Thermal Science
T1  - Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation
VL  - 20
SP  - S151
EP  - S165
DO  - 10.2298/TSCI150827207E
ER  - 

@article{
author = "Erić, Aleksandar and Nemoda, Stevan and Dakić, Dragoljub V. and Repić, Branislav and Đurović, Dejan M.",
year = "2016",
abstract = "The paper presents results of experimental and numerical investigation addressing combustion of baled agricultural biomass in a 50 kW experimental furnace equipped with cigar burners. Experiments performed included measurements of all parameters deemed important for mass and energy balance, as well as parameters defining quality of the combustion process. Experimental results were compared with results of numerical simulations performed with previously developed CFD model. The model takes into account complex thermo mechanical combustion processes occurring in a porous layer of biomass bales and the surrounding fluid. The combustion process and the corresponding model were deemed stationary. Comparison of experimental and numerical results obtained through research presented in this paper showed satisfactory correspondence, leading to the conclusion that the model developed could be used for analysis of different effects associated with variations in process parameters and/or structural modifications in industrial biomass facilities. Mathematical model developed was also utilized to examine the impact of gas re-circulation on maximum temperatures in the combustion chamber. Gas re-circulation was found to have positive effect on the reduction of maximum temperature in the combustion chamber, as well as on the reduction of maximum temperature zone in the chamber. The conclusions made provided valuable inputs towards prevention of biomass ash sintering, which occurs at higher temperatures and negatively affects biomass combustion process.",
journal = "Thermal Science",
title = "Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation",
volume = "20",
pages = "S151-S165",
doi = "10.2298/TSCI150827207E"
}

Erić, A., Nemoda, S., Dakić, D. V., Repić, B.,& Đurović, D. M.. (2016). Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation. in Thermal Science, 20, S151-S165.
https://doi.org/10.2298/TSCI150827207E

Erić A, Nemoda S, Dakić DV, Repić B, Đurović DM. Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation. in Thermal Science. 2016;20:S151-S165.
doi:10.2298/TSCI150827207E .

Erić, Aleksandar, Nemoda, Stevan, Dakić, Dragoljub V., Repić, Branislav, Đurović, Dejan M., "Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation" in Thermal Science, 20 (2016):S151-S165,
https://doi.org/10.2298/TSCI150827207E . .

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Komatina, M.
AU  - Nemoda, Stevan
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/966
AB  - Modeling of transport phenomena in materials with porous bed features requires thermophysical properties, such as porosity, permeability and thermal conductivity be known. The paper presents experimental data obtained in the course of investigation focused on analysis of stagnant thermal conductivity of biomass. Experiments were conducted using a custom designed and constructed experimental setup and implementing original experimental procedure. Results obtained enabled stagnant thermal conductivity of biomass to be determined for different biomass porosity values. Analysis of the experimental data enabled functional dependence of stagnant thermal conductivity on porosity to be determined, with porosity varied in a range 0.50-0.85. Results obtained indicate that reduced bed porosity, down to the value of 0.65, causes stagnant thermal conductivity of the bed to be reduced. Further porosity reduction, below the value of 0.65, results in increased stagnant thermal conductivity of the bed. Experimental procedure developed shall be useful for gathering experimental data on different materials planned to be analyzed when examining transport phenomena occurring during combustion of biomass bales. In addition, data to be acquired shall be helpful in modeling the transport phenomena associated with combustion in porous beds. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Renewable and Sustainable Energy Reviews
T1  - Determination of thermal conductivity of baled agricultural biomass
VL  - 58
SP  - 876
EP  - 884
DO  - 10.1016/j.rser.2015.12.066
ER  - 

@article{
author = "Erić, Aleksandar and Komatina, M. and Nemoda, Stevan and Dakić, Dragoljub V. and Repić, Branislav",
year = "2016",
abstract = "Modeling of transport phenomena in materials with porous bed features requires thermophysical properties, such as porosity, permeability and thermal conductivity be known. The paper presents experimental data obtained in the course of investigation focused on analysis of stagnant thermal conductivity of biomass. Experiments were conducted using a custom designed and constructed experimental setup and implementing original experimental procedure. Results obtained enabled stagnant thermal conductivity of biomass to be determined for different biomass porosity values. Analysis of the experimental data enabled functional dependence of stagnant thermal conductivity on porosity to be determined, with porosity varied in a range 0.50-0.85. Results obtained indicate that reduced bed porosity, down to the value of 0.65, causes stagnant thermal conductivity of the bed to be reduced. Further porosity reduction, below the value of 0.65, results in increased stagnant thermal conductivity of the bed. Experimental procedure developed shall be useful for gathering experimental data on different materials planned to be analyzed when examining transport phenomena occurring during combustion of biomass bales. In addition, data to be acquired shall be helpful in modeling the transport phenomena associated with combustion in porous beds. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Renewable and Sustainable Energy Reviews",
title = "Determination of thermal conductivity of baled agricultural biomass",
volume = "58",
pages = "876-884",
doi = "10.1016/j.rser.2015.12.066"
}

Erić, A., Komatina, M., Nemoda, S., Dakić, D. V.,& Repić, B.. (2016). Determination of thermal conductivity of baled agricultural biomass. in Renewable and Sustainable Energy Reviews
Elsevier., 58, 876-884.
https://doi.org/10.1016/j.rser.2015.12.066

Erić A, Komatina M, Nemoda S, Dakić DV, Repić B. Determination of thermal conductivity of baled agricultural biomass. in Renewable and Sustainable Energy Reviews. 2016;58:876-884.
doi:10.1016/j.rser.2015.12.066 .

Erić, Aleksandar, Komatina, M., Nemoda, Stevan, Dakić, Dragoljub V., Repić, Branislav, "Determination of thermal conductivity of baled agricultural biomass" in Renewable and Sustainable Energy Reviews, 58 (2016):876-884,
https://doi.org/10.1016/j.rser.2015.12.066 . .

TY  - CONF
AU  - Mladenović, Milica
AU  - Dakić, Dragoljub
AU  - Nemoda, Stevan
AU  - Paprika, Milijana
AU  - Repić, Branislav
AU  - Živković, Goran
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11606
AB  - Uprkos činjenici da se upotreba biomase preporučuje sa stanovišta očuvanja životne sredine, usled značajno manje emisije štetnih gasova nego pri sagorevanju uglja, kao najzastupljenijeg domaćeg fosilnog goriva, veoma je značajno praćenje emisije iz dimnih gasova i dobro razumevanje procesa koji utiču na smanjenje koncentracije polutanata. Emisija azotnih oksida (NOx) je jedan od najvećih izazova u tom pogledu. Poznavanje emisije ovih oksida prilikom sagorevanja biomase je neophono radi uspotavljanja korektnih zakonskih normi u pogledu granične emisije i za razvoj što kvalitetnijih tehnologoja za sagorevanje ove vrste goriva. U radu su date izmerene koncentracije azotnih oksida prilikom sagorevanja više vrsta biomase pri stacionarnim uslovima rada eksperimentalnih i demonstraciono - industrijskih postrojenja koja pripadaju dvema različitim tehnologijama: cigaretno sagorevanje balirane slame i sagorevanje u fluidizovanom sloju, kao i sveobuhvatna analiza složenih uticaja na emisiju NOx-a.
AB  - Emissions of nitrogen oxidesat the biomass combustion
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 28. Međunarodni kongres o procesnoj industriji - PROCESING ′15 : zbornik radova
T1  - Emisija azotnih oksida pri sagorevanju biomase
T1  - Emissions of nitrogen oxidesat the biomass combustion
SP  - 214
EP  - 223
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11606
ER  - 

@conference{
author = "Mladenović, Milica and Dakić, Dragoljub and Nemoda, Stevan and Paprika, Milijana and Repić, Branislav and Živković, Goran",
year = "2015",
abstract = "Uprkos činjenici da se upotreba biomase preporučuje sa stanovišta očuvanja životne sredine, usled značajno manje emisije štetnih gasova nego pri sagorevanju uglja, kao najzastupljenijeg domaćeg fosilnog goriva, veoma je značajno praćenje emisije iz dimnih gasova i dobro razumevanje procesa koji utiču na smanjenje koncentracije polutanata. Emisija azotnih oksida (NOx) je jedan od najvećih izazova u tom pogledu. Poznavanje emisije ovih oksida prilikom sagorevanja biomase je neophono radi uspotavljanja korektnih zakonskih normi u pogledu granične emisije i za razvoj što kvalitetnijih tehnologoja za sagorevanje ove vrste goriva. U radu su date izmerene koncentracije azotnih oksida prilikom sagorevanja više vrsta biomase pri stacionarnim uslovima rada eksperimentalnih i demonstraciono - industrijskih postrojenja koja pripadaju dvema različitim tehnologijama: cigaretno sagorevanje balirane slame i sagorevanje u fluidizovanom sloju, kao i sveobuhvatna analiza složenih uticaja na emisiju NOx-a., Emissions of nitrogen oxidesat the biomass combustion",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "28. Međunarodni kongres o procesnoj industriji - PROCESING ′15 : zbornik radova",
title = "Emisija azotnih oksida pri sagorevanju biomase, Emissions of nitrogen oxidesat the biomass combustion",
pages = "214-223",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11606"
}

Mladenović, M., Dakić, D., Nemoda, S., Paprika, M., Repić, B.,& Živković, G.. (2015). Emisija azotnih oksida pri sagorevanju biomase. in 28. Međunarodni kongres o procesnoj industriji - PROCESING ′15 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 214-223.
https://hdl.handle.net/21.15107/rcub_vinar_11606

Mladenović M, Dakić D, Nemoda S, Paprika M, Repić B, Živković G. Emisija azotnih oksida pri sagorevanju biomase. in 28. Međunarodni kongres o procesnoj industriji - PROCESING ′15 : zbornik radova. 2015;:214-223.
https://hdl.handle.net/21.15107/rcub_vinar_11606 .

Mladenović, Milica, Dakić, Dragoljub, Nemoda, Stevan, Paprika, Milijana, Repić, Branislav, Živković, Goran, "Emisija azotnih oksida pri sagorevanju biomase" in 28. Međunarodni kongres o procesnoj industriji - PROCESING ′15 : zbornik radova (2015):214-223,
https://hdl.handle.net/21.15107/rcub_vinar_11606 .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Dakić, Dragoljub V.
AU  - Erić, Aleksandar
AU  - Komatina, Mirko
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/512
AB  - This paper deals with the numerical simulation of liquid fuel combustion in a fluidized reactor using two-fluid Eulerian-Eulerian fluidized bed modeling incorporating the kinetic theory of granular flow (KTGF) to gas and solid phase flow prediction. The comprehensive model of the complex processes in a fluidized combustion chamber incorporates, besides the prediction of gas and particular phase velocity fields, the energy equations for the gas and solid phase and the transport equations of conservation of chemical species with the source terms due to the conversion of chemical components. Numerical experiments showed that the coefficients in the model of inter-phase interaction drag force have a significant effect, and they have to be adjusted for each regime of fluidization. A series of numerical experiments was performed with combustion of liquid fuels in a fluidized bed (FB), with and without significant water content. The given estimations were related to the unsteady state, and the modeled period corresponds to the passing time of the flow through the reactor column. The numerical experiments were conducted to examine the impact of the water content in a liquid fuel on the global FB combustion kinetics.
T2  - Journal of the Serbian Chemical Society
T1  - Euler-Euler granular flow model of the combustion of liquid fuels in a fluidized reactor
VL  - 80
IS  - 3
SP  - 377
EP  - 389
DO  - 10.2298/JSC140130029N
ER  - 

@article{
author = "Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Dakić, Dragoljub V. and Erić, Aleksandar and Komatina, Mirko",
year = "2015",
abstract = "This paper deals with the numerical simulation of liquid fuel combustion in a fluidized reactor using two-fluid Eulerian-Eulerian fluidized bed modeling incorporating the kinetic theory of granular flow (KTGF) to gas and solid phase flow prediction. The comprehensive model of the complex processes in a fluidized combustion chamber incorporates, besides the prediction of gas and particular phase velocity fields, the energy equations for the gas and solid phase and the transport equations of conservation of chemical species with the source terms due to the conversion of chemical components. Numerical experiments showed that the coefficients in the model of inter-phase interaction drag force have a significant effect, and they have to be adjusted for each regime of fluidization. A series of numerical experiments was performed with combustion of liquid fuels in a fluidized bed (FB), with and without significant water content. The given estimations were related to the unsteady state, and the modeled period corresponds to the passing time of the flow through the reactor column. The numerical experiments were conducted to examine the impact of the water content in a liquid fuel on the global FB combustion kinetics.",
journal = "Journal of the Serbian Chemical Society",
title = "Euler-Euler granular flow model of the combustion of liquid fuels in a fluidized reactor",
volume = "80",
number = "3",
pages = "377-389",
doi = "10.2298/JSC140130029N"
}

Nemoda, S., Mladenović, M. R., Paprika, M., Dakić, D. V., Erić, A.,& Komatina, M.. (2015). Euler-Euler granular flow model of the combustion of liquid fuels in a fluidized reactor. in Journal of the Serbian Chemical Society, 80(3), 377-389.
https://doi.org/10.2298/JSC140130029N

Nemoda S, Mladenović MR, Paprika M, Dakić DV, Erić A, Komatina M. Euler-Euler granular flow model of the combustion of liquid fuels in a fluidized reactor. in Journal of the Serbian Chemical Society. 2015;80(3):377-389.
doi:10.2298/JSC140130029N .

Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Dakić, Dragoljub V., Erić, Aleksandar, Komatina, Mirko, "Euler-Euler granular flow model of the combustion of liquid fuels in a fluidized reactor" in Journal of the Serbian Chemical Society, 80, no. 3 (2015):377-389,
https://doi.org/10.2298/JSC140130029N . .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Mladenović, Milica
AU  - Erić, Aleksandar
AU  - Paprika, Milijana
AU  - Đurović, Dejan
AU  - Repić, Branislav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12763
AB  - U radu je predložen dvodimenzijski model numeričke simulacije sagorevanja tečnih goriva u fluidizovanom sloju, koji se zasniva na dvofluidnom Ojler-Ojler pristupu modeliranja fluidizovanog sloja, pri čemu se određivanje polja brzina gasa i čestica u dvofaznim granularnim tokovima zasniva na analogiji sa kinetičkom teorijom gasova. Sveobuhvatan model kompleksnih procesa u fluidizacionoj komori sagorevanja podrazumeva, pored određivanja polja brzina gasne i čestične faze, ugradnja energetskih jednačina gasne i čestične faze, kao i transportnih jednačina hemijskih komponenti sa izvornim članovima usled konverzije komponenata. Brojni numerički eksperimenti pokazuju da izbor koeficijenata u izrazima za sile trenja prilikom interakcije faza ima izuzetan značaj i mora se sprovesti za svaki, značajno različit režim fluidizacije, posebno. Urađene su serije numeričkih eksperimenata sa simulacijom procesa sagorevanja u fluidizovanom sloju sa i bez značajnog sadržaja vode u gorivu. Proračuni su nestacionarni, a modelirani vremenski period odgovara vremenu za koje gas prođe kroz celu visinu reaktora. Izloženi numerički eksperimenti su prvenstveno primenjeni za potvrdu pretpostavke koja se odnosi na uticaj sadržaja vlage u grivu na kinetiku reakcija u fluidizovanom ložištu.
AB  - A comprehensive 2D numerical model of the bubbled fluidized bed with combustion of liquid fuelsis proposed in the paper. The proposed numerical model is based on the Eulerian–Eulerian granular flow modeling with the kinetic theory of granular flow. The model includes the following basic governing equations: the continuity equations of the solid andgas phase, the momentum conservation equations of the gas and solid phase, the energy equations of gas, and the solid phase and conservation equations for chemical components. The choice of the semi empirical constants of the inter-phase interaction drag force model is significant and these constants must be adjusted for each particular regime of fluidiza-tion. Presented numerical experiments primarily were applied to verification of the assumptions about the impact of water content in a liquid fuel on FB combustion intensity. The numerical experiments, based on the proposed mathematical model, also have been used for the purposes of analyzing the im-pacts of various reactor powers as well as fluidization numbers, on the combustion efficiency and on combustion zone temperature fields
T2  - Termotehnika
T1  - CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Ojler-Ojler granularnom modelu
T1  - Fluidized Combustion Chamber CFD Simulation Based on Euler-Euler Granular Flow Model
VL  - 40
IS  - 1-2
SP  - 19
EP  - 33
DO  - 10.5937/termoteh1402019N
ER  - 

@article{
author = "Nemoda, Stevan and Mladenović, Milica and Erić, Aleksandar and Paprika, Milijana and Đurović, Dejan and Repić, Branislav",
year = "2014",
abstract = "U radu je predložen dvodimenzijski model numeričke simulacije sagorevanja tečnih goriva u fluidizovanom sloju, koji se zasniva na dvofluidnom Ojler-Ojler pristupu modeliranja fluidizovanog sloja, pri čemu se određivanje polja brzina gasa i čestica u dvofaznim granularnim tokovima zasniva na analogiji sa kinetičkom teorijom gasova. Sveobuhvatan model kompleksnih procesa u fluidizacionoj komori sagorevanja podrazumeva, pored određivanja polja brzina gasne i čestične faze, ugradnja energetskih jednačina gasne i čestične faze, kao i transportnih jednačina hemijskih komponenti sa izvornim članovima usled konverzije komponenata. Brojni numerički eksperimenti pokazuju da izbor koeficijenata u izrazima za sile trenja prilikom interakcije faza ima izuzetan značaj i mora se sprovesti za svaki, značajno različit režim fluidizacije, posebno. Urađene su serije numeričkih eksperimenata sa simulacijom procesa sagorevanja u fluidizovanom sloju sa i bez značajnog sadržaja vode u gorivu. Proračuni su nestacionarni, a modelirani vremenski period odgovara vremenu za koje gas prođe kroz celu visinu reaktora. Izloženi numerički eksperimenti su prvenstveno primenjeni za potvrdu pretpostavke koja se odnosi na uticaj sadržaja vlage u grivu na kinetiku reakcija u fluidizovanom ložištu., A comprehensive 2D numerical model of the bubbled fluidized bed with combustion of liquid fuelsis proposed in the paper. The proposed numerical model is based on the Eulerian–Eulerian granular flow modeling with the kinetic theory of granular flow. The model includes the following basic governing equations: the continuity equations of the solid andgas phase, the momentum conservation equations of the gas and solid phase, the energy equations of gas, and the solid phase and conservation equations for chemical components. The choice of the semi empirical constants of the inter-phase interaction drag force model is significant and these constants must be adjusted for each particular regime of fluidiza-tion. Presented numerical experiments primarily were applied to verification of the assumptions about the impact of water content in a liquid fuel on FB combustion intensity. The numerical experiments, based on the proposed mathematical model, also have been used for the purposes of analyzing the im-pacts of various reactor powers as well as fluidization numbers, on the combustion efficiency and on combustion zone temperature fields",
journal = "Termotehnika",
title = "CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Ojler-Ojler granularnom modelu, Fluidized Combustion Chamber CFD Simulation Based on Euler-Euler Granular Flow Model",
volume = "40",
number = "1-2",
pages = "19-33",
doi = "10.5937/termoteh1402019N"
}

Nemoda, S., Mladenović, M., Erić, A., Paprika, M., Đurović, D.,& Repić, B.. (2014). CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Ojler-Ojler granularnom modelu. in Termotehnika, 40(1-2), 19-33.
https://doi.org/10.5937/termoteh1402019N

Nemoda S, Mladenović M, Erić A, Paprika M, Đurović D, Repić B. CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Ojler-Ojler granularnom modelu. in Termotehnika. 2014;40(1-2):19-33.
doi:10.5937/termoteh1402019N .

Nemoda, Stevan, Mladenović, Milica, Erić, Aleksandar, Paprika, Milijana, Đurović, Dejan, Repić, Branislav, "CFD numerička simulacija fluidizacione komore sagorevanja bazirane na Ojler-Ojler granularnom modelu" in Termotehnika, 40, no. 1-2 (2014):19-33,
https://doi.org/10.5937/termoteh1402019N . .

TY  - CONF
AU  - Paprika, Milijana
AU  - Repić, Branislav
AU  - Dakić, Dragoljub
AU  - Mladenović, Milica
AU  - Erić, Aleksandar
AU  - Đurović, Dejan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11607
AB  - Održivi razvoj podrazumeva sve veću potrebu za korišćenjem obnovljivih izvora energije, a biomasa predstavlja jedan najvećih potencijala ove vrste u Srbiji. U Laboratoriji za termotehniku i energetiku Instituta „Vinča“ razvijena je tehnologija cigaretnog sagorevanja balirane poljoprivredne biomase, a na osnovu nje izgrađen industrijski kotao toplotne snage 1,5 MW u okviru korporacije PKB Beograd za zagrevanje 1 ha plastenika. Gorivo su velike četvrtaste bale dimenzija 2,0x1,2x0,7 m, težine 200-250 kg. Konstrukcija i primenjena tehnologija sagorevanja rezultirali su kotlom približnih karakteristika kao što su kotlovi sličnih snaga koji koriste tečna ili gasovita goriva. Zbog toga ovaj kotao mora imati savremeni sistem regulacije snage. Za određenu snagu postrojenja sistem za automatsko upravljanje kotla treba da obezbedi kontinualno doziranje goriva, uz prateće promene vazduha za sagorevanje, odnosa primarnog i sekundarnog vazduha i protoka dimnog gasa. Mikroprocesorski računar upravlja snagom postrojenja, pri čemu se u isto vreme vrši kontinualno merenje i prikupljanje neophodnih podataka za periodične analize rada postrojenja. U radu su prikazani osnovni principi razvijenog upravljačkog sistema kotla od 1,5 MW na biomasu, kao i praktični rezultati primene ovog sistema.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova
T1  - Osnovi sistema za automatsko upravljanje industrijskog kotla na biomasu
T1  - Fundamentals of automatic control system of an industrial biomass boiler
SP  - 1
EP  - 5
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11607
ER  - 

@conference{
author = "Paprika, Milijana and Repić, Branislav and Dakić, Dragoljub and Mladenović, Milica and Erić, Aleksandar and Đurović, Dejan",
year = "2014",
abstract = "Održivi razvoj podrazumeva sve veću potrebu za korišćenjem obnovljivih izvora energije, a biomasa predstavlja jedan najvećih potencijala ove vrste u Srbiji. U Laboratoriji za termotehniku i energetiku Instituta „Vinča“ razvijena je tehnologija cigaretnog sagorevanja balirane poljoprivredne biomase, a na osnovu nje izgrađen industrijski kotao toplotne snage 1,5 MW u okviru korporacije PKB Beograd za zagrevanje 1 ha plastenika. Gorivo su velike četvrtaste bale dimenzija 2,0x1,2x0,7 m, težine 200-250 kg. Konstrukcija i primenjena tehnologija sagorevanja rezultirali su kotlom približnih karakteristika kao što su kotlovi sličnih snaga koji koriste tečna ili gasovita goriva. Zbog toga ovaj kotao mora imati savremeni sistem regulacije snage. Za određenu snagu postrojenja sistem za automatsko upravljanje kotla treba da obezbedi kontinualno doziranje goriva, uz prateće promene vazduha za sagorevanje, odnosa primarnog i sekundarnog vazduha i protoka dimnog gasa. Mikroprocesorski računar upravlja snagom postrojenja, pri čemu se u isto vreme vrši kontinualno merenje i prikupljanje neophodnih podataka za periodične analize rada postrojenja. U radu su prikazani osnovni principi razvijenog upravljačkog sistema kotla od 1,5 MW na biomasu, kao i praktični rezultati primene ovog sistema.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova",
title = "Osnovi sistema za automatsko upravljanje industrijskog kotla na biomasu, Fundamentals of automatic control system of an industrial biomass boiler",
pages = "1-5",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11607"
}

Paprika, M., Repić, B., Dakić, D., Mladenović, M., Erić, A.,& Đurović, D.. (2014). Osnovi sistema za automatsko upravljanje industrijskog kotla na biomasu. in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 1-5.
https://hdl.handle.net/21.15107/rcub_vinar_11607

Paprika M, Repić B, Dakić D, Mladenović M, Erić A, Đurović D. Osnovi sistema za automatsko upravljanje industrijskog kotla na biomasu. in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova. 2014;:1-5.
https://hdl.handle.net/21.15107/rcub_vinar_11607 .

Paprika, Milijana, Repić, Branislav, Dakić, Dragoljub, Mladenović, Milica, Erić, Aleksandar, Đurović, Dejan, "Osnovi sistema za automatsko upravljanje industrijskog kotla na biomasu" in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova (2014):1-5,
https://hdl.handle.net/21.15107/rcub_vinar_11607 .

TY  - CONF
AU  - Mladenović, Milica
AU  - Dakić, Dragoljub
AU  - Nemoda, Stevan
AU  - Paprika, Milijana
AU  - Erić, Aleksandar
AU  - Repić, Branislav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11608
AB  - Savremeno društvo i industrija, gde su sekundarni proizvodi neminovnost, je sve veći generator otpada najrazličitije prirode. U mnogim slučajevima ove materije se ne mogu reciklirati, pa je pitanje njihovog daljeg tretmana/deponovanja, zajedno sa pitanjem zaštite ljudskog zdravlja i životne sredine sve aktuelnije. Održivo upravljanje otpadom doprinosi smanjenju njegove generacije i iscrpljivanja prirodnih resursa (materijalnih i energetskih) i obuhvata metode koje spadaju u kategoriju "obnovljivih izvora". Materijalna i energetska iskorišćenost otpada je poželjnija opcija naspram konačnog odlaganja otpada. Jedan od načina za istovremeno ispunjavanje i održivosti domaće energetike je energetsko iskorišćenje ovih nekonvencionalnih, otpadnih goriva, primenom tehnologije sagorevanja u fluidizovanom sloju (FS). U radu su prikazani rezultati ispitivanja sagorevanja više vrsta čvrstih i tečnih otpadnih materija, obavljeni na industrijsko-demonstracionom FS kotlu. Određivano je temperatursko polje po visini ložišta, analiziran sastav dimnih gasova na izlazu iz ložišta i ostali parametri sagorevanja predmetnih goriva. Analizom dobijenih rezultata data je ocena njihove podobnosti sagorevanja u FS uz mogućnost iskorišćenja njihovog energetskog potencijala.
AB  - Modern society and industry, where secondary products are inevitable, are the ever increasing generators of the most different types of waste. In many cases, these substances may not be recycled and, therefore, the question of their treatment/disposal and the question of the health and environment protection are increasingly topical issues. The sustainable waste management contributes to the reduction of waste generation and depletion of natural resources (material and energy resources) and comprises the methods that are included in the category of „renewable sources“. Material and energy utilization of waste is a more favourable option in comparison to the definite (final) waste disposal. One of the ways to meet demands and, at the same time, to provide sustainability of the domestic energy sector is the energy utilization of these unconventional, waste fuels, by using the technology of fluidized bed combustion. This paper includes the results of testing the combustion of several types of solid and liquid waste substances, performed on the industrial-demo boiler with a fluidized bed. The temperature field was determined according to the firing height, the composition of flue gases was analyzed at the firing outlet and other parameters of combustion of the fuels concerned were also analyzed. By the analysis of obtained results, an assessment was given to show their suitability for combustion in a fluidized bed with a possibility to use their energy potential.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova
T1  - Tehnologija korišćenja različitih otpadnih goriva sagorevanjem u fluidizovanom sloju
T1  - Technology of use of various waste fuels  for fluidized bed combustion
SP  - 1
EP  - 7
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11608
ER  - 

@conference{
author = "Mladenović, Milica and Dakić, Dragoljub and Nemoda, Stevan and Paprika, Milijana and Erić, Aleksandar and Repić, Branislav",
year = "2014",
abstract = "Savremeno društvo i industrija, gde su sekundarni proizvodi neminovnost, je sve veći generator otpada najrazličitije prirode. U mnogim slučajevima ove materije se ne mogu reciklirati, pa je pitanje njihovog daljeg tretmana/deponovanja, zajedno sa pitanjem zaštite ljudskog zdravlja i životne sredine sve aktuelnije. Održivo upravljanje otpadom doprinosi smanjenju njegove generacije i iscrpljivanja prirodnih resursa (materijalnih i energetskih) i obuhvata metode koje spadaju u kategoriju "obnovljivih izvora". Materijalna i energetska iskorišćenost otpada je poželjnija opcija naspram konačnog odlaganja otpada. Jedan od načina za istovremeno ispunjavanje i održivosti domaće energetike je energetsko iskorišćenje ovih nekonvencionalnih, otpadnih goriva, primenom tehnologije sagorevanja u fluidizovanom sloju (FS). U radu su prikazani rezultati ispitivanja sagorevanja više vrsta čvrstih i tečnih otpadnih materija, obavljeni na industrijsko-demonstracionom FS kotlu. Određivano je temperatursko polje po visini ložišta, analiziran sastav dimnih gasova na izlazu iz ložišta i ostali parametri sagorevanja predmetnih goriva. Analizom dobijenih rezultata data je ocena njihove podobnosti sagorevanja u FS uz mogućnost iskorišćenja njihovog energetskog potencijala., Modern society and industry, where secondary products are inevitable, are the ever increasing generators of the most different types of waste. In many cases, these substances may not be recycled and, therefore, the question of their treatment/disposal and the question of the health and environment protection are increasingly topical issues. The sustainable waste management contributes to the reduction of waste generation and depletion of natural resources (material and energy resources) and comprises the methods that are included in the category of „renewable sources“. Material and energy utilization of waste is a more favourable option in comparison to the definite (final) waste disposal. One of the ways to meet demands and, at the same time, to provide sustainability of the domestic energy sector is the energy utilization of these unconventional, waste fuels, by using the technology of fluidized bed combustion. This paper includes the results of testing the combustion of several types of solid and liquid waste substances, performed on the industrial-demo boiler with a fluidized bed. The temperature field was determined according to the firing height, the composition of flue gases was analyzed at the firing outlet and other parameters of combustion of the fuels concerned were also analyzed. By the analysis of obtained results, an assessment was given to show their suitability for combustion in a fluidized bed with a possibility to use their energy potential.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova",
title = "Tehnologija korišćenja različitih otpadnih goriva sagorevanjem u fluidizovanom sloju, Technology of use of various waste fuels  for fluidized bed combustion",
pages = "1-7",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11608"
}

Mladenović, M., Dakić, D., Nemoda, S., Paprika, M., Erić, A.,& Repić, B.. (2014). Tehnologija korišćenja različitih otpadnih goriva sagorevanjem u fluidizovanom sloju. in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 1-7.
https://hdl.handle.net/21.15107/rcub_vinar_11608

Mladenović M, Dakić D, Nemoda S, Paprika M, Erić A, Repić B. Tehnologija korišćenja različitih otpadnih goriva sagorevanjem u fluidizovanom sloju. in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova. 2014;:1-7.
https://hdl.handle.net/21.15107/rcub_vinar_11608 .

Mladenović, Milica, Dakić, Dragoljub, Nemoda, Stevan, Paprika, Milijana, Erić, Aleksandar, Repić, Branislav, "Tehnologija korišćenja različitih otpadnih goriva sagorevanjem u fluidizovanom sloju" in 27. Međunarodni kongres o procesnoj industriji - PROCESING ′14 : zbornik radova (2014):1-7,
https://hdl.handle.net/21.15107/rcub_vinar_11608 .