Development and improvement of technologies for energy efficient and environmentally sound use of several types of agricultural and forest biomass and possible utilization for cogeneration

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info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/42011/RS//

Development and improvement of technologies for energy efficient and environmentally sound use of several types of agricultural and forest biomass and possible utilization for cogeneration (en)
Развој и унапређење технологија за енергетски ефикасно коришћење више форми пољопривредне и шумске биомасе на еколошки прихватљив начин, уз могућност когенерације (sr)
Razvoj i unapređenje tehnologija za energetski efikasno korišćenje više formi poljoprivredne i šumske biomase na ekološki prihvatljiv način, uz mogućnost kogeneracije (sr_RS)
Authors

Publications

Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy: Part B

Stefanović, Predrag Lj.; Cvetinović, Dejan; Marković, Zoran M.; Erić, Milić D.; Oka, Simeon N.; Repić, Branislav

(2019)

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Marković, Zoran M.
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 M. 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. M., 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 ZM, 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 M., 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 . .

Review of the investigations of pulverized coal combustion processes in large power plants in laboratory for thermal engineering and energy-Part A

Repić, Branislav; Stefanović, Predrag Lj.; Belošević, Srđan; Crnomarković, Nenad Đ.; Oka, Simeon N.

(2019)

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 . .

Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research

Grubor, Borislav; Dakić, Dragoljub V.; Nemoda, Stevan; Mladenović, Milica R.; Paprika, Milijana; Oka, Simeon N.

(2019)

TY  - JOUR
AU  - Grubor, Borislav
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Oka, Simeon N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8985
AB  - The paper gives a review of the most important results of extensive targeted fundamental research program on fluidized bed combustion in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. The paper presents a detailed overview of research activities from the beginning in the second half of the 1970'' up to present days. Starting with the motives for initiating the investigations in this field, the paper highlights various phases of research and points out the main results of all research activities, not only the ones that are focused in this paper. Targeted fundamental research topics that are overviewed in this paper are heat and mass transfer, coal particle fragmentation, char particle combustion, sulfur self-retention by coal ash itself, as well as circulating fluidized bed modeling.
T2  - Thermal Science
T1  - Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research
VL  - 23
IS  - Suppl. 5
SP  - 1637
EP  - 1653
DO  - 10.2298/TSCI180725289G
ER  - 
@article{
author = "Grubor, Borislav and Dakić, Dragoljub V. and Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Oka, Simeon N.",
year = "2019",
abstract = "The paper gives a review of the most important results of extensive targeted fundamental research program on fluidized bed combustion in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. The paper presents a detailed overview of research activities from the beginning in the second half of the 1970'' up to present days. Starting with the motives for initiating the investigations in this field, the paper highlights various phases of research and points out the main results of all research activities, not only the ones that are focused in this paper. Targeted fundamental research topics that are overviewed in this paper are heat and mass transfer, coal particle fragmentation, char particle combustion, sulfur self-retention by coal ash itself, as well as circulating fluidized bed modeling.",
journal = "Thermal Science",
title = "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research",
volume = "23",
number = "Suppl. 5",
pages = "1637-1653",
doi = "10.2298/TSCI180725289G"
}
Grubor, B., Dakić, D. V., Nemoda, S., Mladenović, M. R., Paprika, M.,& Oka, S. N.. (2019). Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research. in Thermal Science, 23(Suppl. 5), 1637-1653.
https://doi.org/10.2298/TSCI180725289G
Grubor B, Dakić DV, Nemoda S, Mladenović MR, Paprika M, Oka SN. Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research. in Thermal Science. 2019;23(Suppl. 5):1637-1653.
doi:10.2298/TSCI180725289G .
Grubor, Borislav, Dakić, Dragoljub V., Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Oka, Simeon N., "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research" in Thermal Science, 23, no. Suppl. 5 (2019):1637-1653,
https://doi.org/10.2298/TSCI180725289G . .
1
1

Modeling of transport processes in the cigarette principle combustion furnace

Erić, Aleksandar; Nemoda, Stevan; Komatina, Mirko; Repić, Branislav; Dakic, Dragoljub

(2019)

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 . .

Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation

Grubor, Borislav; Dakić, Dragoljub V.; Nemoda, Stevan; Mladenović, Milica R.; Paprika, Milijana; Oka, Simeon N.

(2019)

TY  - JOUR
AU  - Grubor, Borislav
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Oka, Simeon N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8988
AB  - Paper gives a review of the most important results of extensive and wide-ranging research program on R&D of fluidized bed combustion technology in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. Paper presents detailed overview of R&D activities from the beginning in the second half of the 1970's up to present days. These activities encompass applied research achievements in the field of characterization of limestones and bed agglomeration and sintering and modeling of overall processes during fluidized bed combustion, all of which have facilitated the R&D of the fluidized bed combustion technology. Attention is also given to steady-state combustion testing of a wide-range of fuels (coals, liquid fuels, biomass, waste solid and liquid materials, etc.) in our fluidized bed combustor and development of original methodology for testing the suitability of fuels for fluidized bed combustion, as well as specific achievements in the area of technology application in Serbia.
T2  - Thermal Science
T1  - Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation
VL  - 23
IS  - Suppl. 5
SP  - 1655
EP  - 1667
DO  - 10.2298/TSCI180725290G
ER  - 
@article{
author = "Grubor, Borislav and Dakić, Dragoljub V. and Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Oka, Simeon N.",
year = "2019",
abstract = "Paper gives a review of the most important results of extensive and wide-ranging research program on R&D of fluidized bed combustion technology in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. Paper presents detailed overview of R&D activities from the beginning in the second half of the 1970's up to present days. These activities encompass applied research achievements in the field of characterization of limestones and bed agglomeration and sintering and modeling of overall processes during fluidized bed combustion, all of which have facilitated the R&D of the fluidized bed combustion technology. Attention is also given to steady-state combustion testing of a wide-range of fuels (coals, liquid fuels, biomass, waste solid and liquid materials, etc.) in our fluidized bed combustor and development of original methodology for testing the suitability of fuels for fluidized bed combustion, as well as specific achievements in the area of technology application in Serbia.",
journal = "Thermal Science",
title = "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation",
volume = "23",
number = "Suppl. 5",
pages = "1655-1667",
doi = "10.2298/TSCI180725290G"
}
Grubor, B., Dakić, D. V., Nemoda, S., Mladenović, M. R., Paprika, M.,& Oka, S. N.. (2019). Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation. in Thermal Science, 23(Suppl. 5), 1655-1667.
https://doi.org/10.2298/TSCI180725290G
Grubor B, Dakić DV, Nemoda S, Mladenović MR, Paprika M, Oka SN. Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation. in Thermal Science. 2019;23(Suppl. 5):1655-1667.
doi:10.2298/TSCI180725290G .
Grubor, Borislav, Dakić, Dragoljub V., Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Oka, Simeon N., "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation" in Thermal Science, 23, no. Suppl. 5 (2019):1655-1667,
https://doi.org/10.2298/TSCI180725290G . .

Experimental investigation on the kinetics of biomass combustion in vertical tube reactor

Erić, Aleksandar; Nemoda, Stevan; Komatina, Mirko S.; Dakić, Dragoljub V.; Repić, Branislav

(2019)

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Nemoda, Stevan
AU  - Komatina, Mirko S.
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
PY  - 2019
UR  - http://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 . .
5
4
6

Denitrification techniques for biomass combustion

Mladenović, Milica R.; Paprika, Milijana; Marinković, Ana D.

(2018)

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Marinković, Ana D.
PY  - 2018
UR  - http://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 . .
60
52
59

Determination of thermal conductivity of baled agricultural biomass

Erić, Aleksandar; Komatina, M.; Nemoda, Stevan; Dakić, Dragoljub V.; Repić, Branislav

(Elsevier, 2016)

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Komatina, M.
AU  - Nemoda, Stevan
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
PY  - 2016
UR  - http://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 . .
2
2
4

Numerical simulation of latent heat storage with conductance enhancing fins

Rudonja, Nedzad R.; Komatina, Mirko S.; Antonijević, Dragi Lj.; Živković, Goran S.

(2016)

TY  - JOUR
AU  - Rudonja, Nedzad R.
AU  - Komatina, Mirko S.
AU  - Antonijević, Dragi Lj.
AU  - Živković, Goran S.
PY  - 2016
UR  - http://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
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"
}
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.
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..
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.

Heat Transfer Enhancement Through Pcm Thermal Storage By Use of Copper Fins

Rudonja, Nedzad R.; Komatina, Mirko S.; Živković, Goran S.; Antonijević, Dragi Lj.

(2016)

TY  - JOUR
AU  - Rudonja, Nedzad R.
AU  - Komatina, Mirko S.
AU  - Živković, Goran S.
AU  - Antonijević, Dragi Lj.
PY  - 2016
UR  - http://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 . .
3
5

Mechanism of Primary Fragmentation of Coal in Fluidized Bed

Paprika, Milijana; Komatina, Mirko S.; Mladenović, Milica R.; Živković, Goran S.; Dakić, Dragoljub V.

(2016)

TY  - JOUR
AU  - Paprika, Milijana
AU  - Komatina, Mirko S.
AU  - Mladenović, Milica R.
AU  - Živković, Goran S.
AU  - Dakić, Dragoljub V.
PY  - 2016
UR  - http://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 . .
3
3
4

The combustion of biomass - The impact of its types and combustion technologies on the emission of nitrogen oxide

Mladenović, Milica R.; Dakić, Dragoljub V.; Nemoda, Stevan; Paprika, Milijana; Komatina, Mirko S.; Repić, Branislav; Erić, Aleksandar

(2016)

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  - http://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 . .
1
7
5
9

Experimental and Numerical Study on Combustion of Baled Biomass in Cigar Burners and Effects of Flue Gas Re-Circulation

Erić, Aleksandar; Nemoda, Stevan; Dakić, Dragoljub V.; Repić, Branislav; Đurović, Dejan M.

(2016)

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Nemoda, Stevan
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
AU  - Đurović, Dejan M.
PY  - 2016
UR  - http://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 . .
2
1
4

Influence of biomass furnace volume change on flue gases burn out process

Đurović, Dejan R.; Nemoda, Stevan; Repić, Branislav; Dakić, Dragoljub V.; Adžić, Miroljub M.

(2015)

TY  - JOUR
AU  - Đurović, Dejan R.
AU  - Nemoda, Stevan
AU  - Repić, Branislav
AU  - Dakić, Dragoljub V.
AU  - Adžić, Miroljub M.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/387
AB  - In this paper has been shown improvement of the existing furnace for biomass combustion in the way of improving energy efficiency and meeting environmental protection criteria. One of the main problems during baled biomass combustion process is high CO emission due to incomplete combustion of flue gases. By proper furnace dimensioning that problem can be avoided and also high investment costs can be reduced, since the cost of the furnace is 30-40% of total biomass plant costs. Two-dimensional turbulent flow model with homogeneous chemical reactions has been developed. Turbulent flow is considered using time averaging Navier-Stokes equations that are closed by k-epsilon turbulence model. Calculations based on the proposed models were conducted using commercial CFD package FLUENT. Accuracy of the model has been previously confirmed with experimental data obtained on the existing furnace. Comparative analysis of the results of modeling existing and proposed (improved) furnace has shown lower CO emission (more than 50% less CO emission) at the proposed furnace outlet. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Renewable Energy
T1  - Influence of biomass furnace volume change on flue gases burn out process
VL  - 76
SP  - 1
EP  - 6
DO  - 10.1016/j.renene.2014.11.007
ER  - 
@article{
author = "Đurović, Dejan R. and Nemoda, Stevan and Repić, Branislav and Dakić, Dragoljub V. and Adžić, Miroljub M.",
year = "2015",
abstract = "In this paper has been shown improvement of the existing furnace for biomass combustion in the way of improving energy efficiency and meeting environmental protection criteria. One of the main problems during baled biomass combustion process is high CO emission due to incomplete combustion of flue gases. By proper furnace dimensioning that problem can be avoided and also high investment costs can be reduced, since the cost of the furnace is 30-40% of total biomass plant costs. Two-dimensional turbulent flow model with homogeneous chemical reactions has been developed. Turbulent flow is considered using time averaging Navier-Stokes equations that are closed by k-epsilon turbulence model. Calculations based on the proposed models were conducted using commercial CFD package FLUENT. Accuracy of the model has been previously confirmed with experimental data obtained on the existing furnace. Comparative analysis of the results of modeling existing and proposed (improved) furnace has shown lower CO emission (more than 50% less CO emission) at the proposed furnace outlet. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Renewable Energy",
title = "Influence of biomass furnace volume change on flue gases burn out process",
volume = "76",
pages = "1-6",
doi = "10.1016/j.renene.2014.11.007"
}
Đurović, D. R., Nemoda, S., Repić, B., Dakić, D. V.,& Adžić, M. M.. (2015). Influence of biomass furnace volume change on flue gases burn out process. in Renewable Energy, 76, 1-6.
https://doi.org/10.1016/j.renene.2014.11.007
Đurović DR, Nemoda S, Repić B, Dakić DV, Adžić MM. Influence of biomass furnace volume change on flue gases burn out process. in Renewable Energy. 2015;76:1-6.
doi:10.1016/j.renene.2014.11.007 .
Đurović, Dejan R., Nemoda, Stevan, Repić, Branislav, Dakić, Dragoljub V., Adžić, Miroljub M., "Influence of biomass furnace volume change on flue gases burn out process" in Renewable Energy, 76 (2015):1-6,
https://doi.org/10.1016/j.renene.2014.11.007 . .
11
10
10

An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies

Stakic, Milan; Cvetinović, Dejan; Škobalj, Predrag D.; Spasojević, Vuk D.

(2014)

TY  - JOUR
AU  - Stakic, Milan
AU  - Cvetinović, Dejan
AU  - Škobalj, Predrag D.
AU  - Spasojević, Vuk D.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/243
AB  - Despite benefiting from vast fuel reserves, combustion of low-rank coals is commonly characterized by low thermal efficiency and high pollutant emissions, partly due to high moisture content of the coals in question. Thus, removal of moisture from low-rank coals is deemed an important quality upgrading method. The paper provides an overview of the current status of low-rank coal upgrading technologies, particularly with respect to utilization of drying and dewatering procedures. In order to examine the influence of relevant parameters on the moisture removal process, a model of convective coal drying in a packed, as well as in a fluid bed combustion arrangement, is developed and presented. Product-specific data (intraparticle mass transfer, gas-solid moisture equilibrium) related to the coal variety addressed herein (lignite) are obtained through preliminary investigations. Effective thermal conductivity of the packed bed as defined by Zehner/Bauer/Schlunder is used to define heat transfer mechanisms occurring in the packed bed. Similar two-phase fluidization model has been validated for different types of biomaterials. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Research and Design
T1  - An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies
VL  - 92
IS  - 11
SP  - 2383
EP  - 2395
DO  - 10.1016/j.cherd.2014.02.032
ER  - 
@article{
author = "Stakic, Milan and Cvetinović, Dejan and Škobalj, Predrag D. and Spasojević, Vuk D.",
year = "2014",
abstract = "Despite benefiting from vast fuel reserves, combustion of low-rank coals is commonly characterized by low thermal efficiency and high pollutant emissions, partly due to high moisture content of the coals in question. Thus, removal of moisture from low-rank coals is deemed an important quality upgrading method. The paper provides an overview of the current status of low-rank coal upgrading technologies, particularly with respect to utilization of drying and dewatering procedures. In order to examine the influence of relevant parameters on the moisture removal process, a model of convective coal drying in a packed, as well as in a fluid bed combustion arrangement, is developed and presented. Product-specific data (intraparticle mass transfer, gas-solid moisture equilibrium) related to the coal variety addressed herein (lignite) are obtained through preliminary investigations. Effective thermal conductivity of the packed bed as defined by Zehner/Bauer/Schlunder is used to define heat transfer mechanisms occurring in the packed bed. Similar two-phase fluidization model has been validated for different types of biomaterials. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Research and Design",
title = "An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies",
volume = "92",
number = "11",
pages = "2383-2395",
doi = "10.1016/j.cherd.2014.02.032"
}
Stakic, M., Cvetinović, D., Škobalj, P. D.,& Spasojević, V. D.. (2014). An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies. in Chemical Engineering Research and Design, 92(11), 2383-2395.
https://doi.org/10.1016/j.cherd.2014.02.032
Stakic M, Cvetinović D, Škobalj PD, Spasojević VD. An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies. in Chemical Engineering Research and Design. 2014;92(11):2383-2395.
doi:10.1016/j.cherd.2014.02.032 .
Stakic, Milan, Cvetinović, Dejan, Škobalj, Predrag D., Spasojević, Vuk D., "An initial study on feasible treatment of Serbian lignite through utilization of low-rank coal upgrading technologies" in Chemical Engineering Research and Design, 92, no. 11 (2014):2383-2395,
https://doi.org/10.1016/j.cherd.2014.02.032 . .
18
16
16

Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju

Mladenović, Milica R.

(Универзитет у Београду, Машински факултет, 2013)

TY  - THES
AU  - Mladenović, Milica R.
PY  - 2013
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=862
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:7246/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=514394531
UR  - http://nardus.mpn.gov.rs/123456789/2313
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7248
AB  - U zemljama, poput naše, sa ograničenim izvorima primarne energije, sve jeizraženija potreba za korišćenjem sopstvenih raspoloživih goriva, ne bi li se delimičnosupstitusali uvezeni energenti. U tom slučaju, nekonvencijalna tečna goriva velikihgustina (TTG) predstavljaju jedno od mogućih izbora goriva, koji podrazumeva iprimenu tehnologija sagorevanja u fluidizovanom sloju (FS). Činjenica da se u FSkotlovima mogu sagorevati goriva i sa 85% inertnog materijala, sa efikasnimodsumporavanjem i nižom emisijom NOx koja zadovoljava ekološke standarde, ovojtehnologiji sagorevanja u odnosu na druge daje izrazitu prednost.U okviru teze urañena su obimna teorijska i eksperimentalna istraživanja složenih imeñusobno spregnutih strujno-termičkih procesa koji se odvijaju pri termičkojdezintegraciji TTG-a u fluidizovanom sloju (FS), u cilju razvoja tehnologije zaenergetski efikasno sagorevanje ovakvih materija na ekološki prihvatljiv način.Predstavljeni su rezulti eksperimenata sagorevanja različitih tečnih nekonvencijalnihgoriva u FS, na poluindustrijskoj laboratorijskoj aparaturi sa akcentom na ostvarivanjeniske emisije štetnih materija u dimnim gasovima, na potpunost sagorevanja i lociranjezone intenzivnog sagorevanja.Detaljno poznavanje i razumevanje procesa doziranja goriva, njegovog mešanja sainertnim materijalom i vazduhom u okviru radnog prostora ložišta je od izuzetnogznačaja za definisanje optimalnih radnih parametara FS, a numeričke simulacijepredstavljaju efikasno sredstvo za ostvarenje tog cilja. U tezi su predstavljena dva 2Dmatematičko-numerička (CFD) modela za detaljnu simulaciju prodora bočnog mlaza ufluidizovani sloj: sopstveni fluid-porozni medijum i granularni Euler-Euler modelsimulacije FS, koja koriste dvo-fluidni pristup modeliranja gde se gas i gusta faza FSposmatraju kao dva fluida sa različitim karakteristikama.Fluid-porozni medijum model prodora mlaza u FS, je zasnovan na postupkuproračuna kod koga se gusta faza FS posmatra kao fiksni porozni medijum. Interakcijaizmeñu gasa i čestica, kao i pojava mehuraste faze, je modelirana na osnovu bilansa silatrenja izmeñu gasa i čestica u gustoj fazi FS, pri čemu su uzete u obzir interakcijeiiizmeñu čestica i efekti sudara čestica. Ovakav pristup modeliranju FS pogodan je zabrze inženjerske proračune stacionarnog stanja fluidizacionog medijuma upostrojenjima sa FS...
AB  - In countries like ours, with limited primary energy sources, there is a need, whichwill be even more pronounced in the future, to use own fuels available, in order topartially substitute imported fuel. In that case, unconventional liquid large density fuels(heavy liquid fuels - HLF) are one of the possible choices of fuel, which implies theapplication of fluidized bed (FB) combustion technology. The fact that fluidized bedboilers can burn fuels with 85% of inert materials, with effective retention of SO2 byadding limestone into the furnace, and lower NOx emissions to meet environmentalstandards, gives significant advantages to this technology compared to other combustiontechnologies.As part of the thesis extensive theoretical and experimental studies of complexand mutually coupled flow-thermal processes occurring during thermal disintegrationTTG in a fluidized bed (FB) were performed, in order to develop a technology forenergy-efficient combustion of these materials in an environmentally sound manner.The results of combustion experiments of different unconventional liquid fuels in thefluidized pilot furnace apparatus were presented, with emphasis on achieving lowemissions of pollutants in flue gases, completeness of combustion and locating zones ofintense combustion.Detailed knowledge and understanding of the process of fuel feeding and itsmixing with inert bed material and air in the working space of furnace is of greatimportance for defining optimal operating parameters of the FB, and numericalsimulations are an effective tool for achieving this goal. In the thesis two 2Dmathematical-numerical (CFD) models for detailed simulation of lateral jet penetrationinto the fluidized bed are presented: a previously developed fluid-porous media model,and granular Euler-Euler model, which both simulate the FB and use the two-fluidmodeling approach, where gas and dense phase of the FB are considered as two fluidswith different characteristics...
PB  - Универзитет у Београду, Машински факултет
T2  - Универзитет у Београду
T1  - Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju
T1  - Research of thermomechanical proces during decomposition of high density liquid fuel in the fluidized bed
ER  - 
@phdthesis{
author = "Mladenović, Milica R.",
year = "2013",
abstract = "U zemljama, poput naše, sa ograničenim izvorima primarne energije, sve jeizraženija potreba za korišćenjem sopstvenih raspoloživih goriva, ne bi li se delimičnosupstitusali uvezeni energenti. U tom slučaju, nekonvencijalna tečna goriva velikihgustina (TTG) predstavljaju jedno od mogućih izbora goriva, koji podrazumeva iprimenu tehnologija sagorevanja u fluidizovanom sloju (FS). Činjenica da se u FSkotlovima mogu sagorevati goriva i sa 85% inertnog materijala, sa efikasnimodsumporavanjem i nižom emisijom NOx koja zadovoljava ekološke standarde, ovojtehnologiji sagorevanja u odnosu na druge daje izrazitu prednost.U okviru teze urañena su obimna teorijska i eksperimentalna istraživanja složenih imeñusobno spregnutih strujno-termičkih procesa koji se odvijaju pri termičkojdezintegraciji TTG-a u fluidizovanom sloju (FS), u cilju razvoja tehnologije zaenergetski efikasno sagorevanje ovakvih materija na ekološki prihvatljiv način.Predstavljeni su rezulti eksperimenata sagorevanja različitih tečnih nekonvencijalnihgoriva u FS, na poluindustrijskoj laboratorijskoj aparaturi sa akcentom na ostvarivanjeniske emisije štetnih materija u dimnim gasovima, na potpunost sagorevanja i lociranjezone intenzivnog sagorevanja.Detaljno poznavanje i razumevanje procesa doziranja goriva, njegovog mešanja sainertnim materijalom i vazduhom u okviru radnog prostora ložišta je od izuzetnogznačaja za definisanje optimalnih radnih parametara FS, a numeričke simulacijepredstavljaju efikasno sredstvo za ostvarenje tog cilja. U tezi su predstavljena dva 2Dmatematičko-numerička (CFD) modela za detaljnu simulaciju prodora bočnog mlaza ufluidizovani sloj: sopstveni fluid-porozni medijum i granularni Euler-Euler modelsimulacije FS, koja koriste dvo-fluidni pristup modeliranja gde se gas i gusta faza FSposmatraju kao dva fluida sa različitim karakteristikama.Fluid-porozni medijum model prodora mlaza u FS, je zasnovan na postupkuproračuna kod koga se gusta faza FS posmatra kao fiksni porozni medijum. Interakcijaizmeñu gasa i čestica, kao i pojava mehuraste faze, je modelirana na osnovu bilansa silatrenja izmeñu gasa i čestica u gustoj fazi FS, pri čemu su uzete u obzir interakcijeiiizmeñu čestica i efekti sudara čestica. Ovakav pristup modeliranju FS pogodan je zabrze inženjerske proračune stacionarnog stanja fluidizacionog medijuma upostrojenjima sa FS..., In countries like ours, with limited primary energy sources, there is a need, whichwill be even more pronounced in the future, to use own fuels available, in order topartially substitute imported fuel. In that case, unconventional liquid large density fuels(heavy liquid fuels - HLF) are one of the possible choices of fuel, which implies theapplication of fluidized bed (FB) combustion technology. The fact that fluidized bedboilers can burn fuels with 85% of inert materials, with effective retention of SO2 byadding limestone into the furnace, and lower NOx emissions to meet environmentalstandards, gives significant advantages to this technology compared to other combustiontechnologies.As part of the thesis extensive theoretical and experimental studies of complexand mutually coupled flow-thermal processes occurring during thermal disintegrationTTG in a fluidized bed (FB) were performed, in order to develop a technology forenergy-efficient combustion of these materials in an environmentally sound manner.The results of combustion experiments of different unconventional liquid fuels in thefluidized pilot furnace apparatus were presented, with emphasis on achieving lowemissions of pollutants in flue gases, completeness of combustion and locating zones ofintense combustion.Detailed knowledge and understanding of the process of fuel feeding and itsmixing with inert bed material and air in the working space of furnace is of greatimportance for defining optimal operating parameters of the FB, and numericalsimulations are an effective tool for achieving this goal. In the thesis two 2Dmathematical-numerical (CFD) models for detailed simulation of lateral jet penetrationinto the fluidized bed are presented: a previously developed fluid-porous media model,and granular Euler-Euler model, which both simulate the FB and use the two-fluidmodeling approach, where gas and dense phase of the FB are considered as two fluidswith different characteristics...",
publisher = "Универзитет у Београду, Машински факултет",
journal = "Универзитет у Београду",
title = "Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju, Research of thermomechanical proces during decomposition of high density liquid fuel in the fluidized bed"
}
Mladenović, M. R.. (2013). Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju. in Универзитет у Београду
Универзитет у Београду, Машински факултет..
Mladenović MR. Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju. in Универзитет у Београду. 2013;..
Mladenović, Milica R., "Istraživanje termomehaničkih procesa prilikom razgradnje tečnih goriva velikih gustina u fluidizovanom sloju" in Универзитет у Београду (2013).

Investigation of the cigar burner combustion system for baled biomass

Repić, Branislav; Dakić, Dragoljub V.; Erić, Aleksandar; Đurović, Dejan M.; Marinković, Ana D.; Nemoda, Stevan

(2013)

TY  - JOUR
AU  - Repić, Branislav
AU  - Dakić, Dragoljub V.
AU  - Erić, Aleksandar
AU  - Đurović, Dejan M.
AU  - Marinković, Ana D.
AU  - Nemoda, Stevan
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5857
AB  - Biomass is deemed to be the main source of renewable energy in Serbia. Over the past couple of years, considerable efforts have been made to develop a technology which would enable biomass bales of various sizes and shapes to be used for energy production. A hot water boiler with cigarette type of combustion was constructed and used in the experimental investigation of biomass combustion phenomena. During the experiments performed, numerous parameters were measured: flue gas temperature, water temperature at the boiler inlet and outlet, while O-2, CO2, CO, SO2, and NOx content in the flue gas was measured at the boiler outlet. Experiments were performed with biomass feed rate of 0.12 kg/s, mean boiler output of 1.56 MW and mean excess air coefficient of 2.1. During the steady state boiler operation, exhaust gas temperature was measured to be around 150-160 degrees C and obtained CO and NOx emission rates were found to be quite acceptable. In addition, combustion of biomass bales in cigar burners was modelled by the means of appropriate numerical simulation. A good agreement between experimental and numerical results was obtained. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Biomass and Bioenergy
T1  - Investigation of the cigar burner combustion system for baled biomass
VL  - 58
SP  - 10
EP  - 19
DO  - 10.1016/j.biombioe.2013.10.016
ER  - 
@article{
author = "Repić, Branislav and Dakić, Dragoljub V. and Erić, Aleksandar and Đurović, Dejan M. and Marinković, Ana D. and Nemoda, Stevan",
year = "2013",
abstract = "Biomass is deemed to be the main source of renewable energy in Serbia. Over the past couple of years, considerable efforts have been made to develop a technology which would enable biomass bales of various sizes and shapes to be used for energy production. A hot water boiler with cigarette type of combustion was constructed and used in the experimental investigation of biomass combustion phenomena. During the experiments performed, numerous parameters were measured: flue gas temperature, water temperature at the boiler inlet and outlet, while O-2, CO2, CO, SO2, and NOx content in the flue gas was measured at the boiler outlet. Experiments were performed with biomass feed rate of 0.12 kg/s, mean boiler output of 1.56 MW and mean excess air coefficient of 2.1. During the steady state boiler operation, exhaust gas temperature was measured to be around 150-160 degrees C and obtained CO and NOx emission rates were found to be quite acceptable. In addition, combustion of biomass bales in cigar burners was modelled by the means of appropriate numerical simulation. A good agreement between experimental and numerical results was obtained. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Biomass and Bioenergy",
title = "Investigation of the cigar burner combustion system for baled biomass",
volume = "58",
pages = "10-19",
doi = "10.1016/j.biombioe.2013.10.016"
}
Repić, B., Dakić, D. V., Erić, A., Đurović, D. M., Marinković, A. D.,& Nemoda, S.. (2013). Investigation of the cigar burner combustion system for baled biomass. in Biomass and Bioenergy, 58, 10-19.
https://doi.org/10.1016/j.biombioe.2013.10.016
Repić B, Dakić DV, Erić A, Đurović DM, Marinković AD, Nemoda S. Investigation of the cigar burner combustion system for baled biomass. in Biomass and Bioenergy. 2013;58:10-19.
doi:10.1016/j.biombioe.2013.10.016 .
Repić, Branislav, Dakić, Dragoljub V., Erić, Aleksandar, Đurović, Dejan M., Marinković, Ana D., Nemoda, Stevan, "Investigation of the cigar burner combustion system for baled biomass" in Biomass and Bioenergy, 58 (2013):10-19,
https://doi.org/10.1016/j.biombioe.2013.10.016 . .
13
4
8

Experimental determination of the swirl burner laboratory models hydraulic resistance

Repić, Branislav; Erić, Aleksandar; Đurović, Dejan R.; Marinković, Ana D.; Živković, Goran S.

(2012)

TY  - CONF
AU  - Repić, Branislav
AU  - Erić, Aleksandar
AU  - Đurović, Dejan R.
AU  - Marinković, Ana D.
AU  - Živković, Goran S.
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7154
AB  - Performed investigation of pulverized fuel combustion in swirl flows has shown that there are two important groups of influential parameters: fuel and burner characteristics. The most important conclusion of these investigations is that each type of fuel needs a defined burner for its combustion and concrete operating parameters for its optimal work. Optimal operating parameters can be determined only by performing the appropriate experiments. Selection of optimal swirl burner design is dependent on energy loss which is used for air transport through burner. Increasing of swirl intensity is convenient for fuel ignition and flame stability, but energy loss for air transport increases, too. Swirl economy is estimated using hydraulic resistance parameter which represents energy loss due to swirling. In the paper are presented the methods and experimental data of hydraulic resistance determination for three laboratory models of swirl burners for pulverized fuel combustion. In the tangential burner the swirling is accomplished by tangential inflow of secondary air and fuel/air mixture. Axial-blade burner of type 1 enables swirling by a set of 18 blades. Axial-blade burner of type 2 is with a central lead of gas and coaxial lead of fuel/air mixture, primary air and recirculating gases. In movable swirl block burner the secondary air swirling is enabled by 8 stationary and 8 movable blocks fixed at movable and stationary plate. (C) 2012 Published by Elsevier Ltd.
C3  - Procedia Engineering
T1  - Experimental determination of the swirl burner laboratory models hydraulic resistance
VL  - 42
SP  - 672
EP  - 682
DO  - 10.1016/j.proeng.2012.07.460
ER  - 
@conference{
author = "Repić, Branislav and Erić, Aleksandar and Đurović, Dejan R. and Marinković, Ana D. and Živković, Goran S.",
year = "2012",
abstract = "Performed investigation of pulverized fuel combustion in swirl flows has shown that there are two important groups of influential parameters: fuel and burner characteristics. The most important conclusion of these investigations is that each type of fuel needs a defined burner for its combustion and concrete operating parameters for its optimal work. Optimal operating parameters can be determined only by performing the appropriate experiments. Selection of optimal swirl burner design is dependent on energy loss which is used for air transport through burner. Increasing of swirl intensity is convenient for fuel ignition and flame stability, but energy loss for air transport increases, too. Swirl economy is estimated using hydraulic resistance parameter which represents energy loss due to swirling. In the paper are presented the methods and experimental data of hydraulic resistance determination for three laboratory models of swirl burners for pulverized fuel combustion. In the tangential burner the swirling is accomplished by tangential inflow of secondary air and fuel/air mixture. Axial-blade burner of type 1 enables swirling by a set of 18 blades. Axial-blade burner of type 2 is with a central lead of gas and coaxial lead of fuel/air mixture, primary air and recirculating gases. In movable swirl block burner the secondary air swirling is enabled by 8 stationary and 8 movable blocks fixed at movable and stationary plate. (C) 2012 Published by Elsevier Ltd.",
journal = "Procedia Engineering",
title = "Experimental determination of the swirl burner laboratory models hydraulic resistance",
volume = "42",
pages = "672-682",
doi = "10.1016/j.proeng.2012.07.460"
}
Repić, B., Erić, A., Đurović, D. R., Marinković, A. D.,& Živković, G. S.. (2012). Experimental determination of the swirl burner laboratory models hydraulic resistance. in Procedia Engineering, 42, 672-682.
https://doi.org/10.1016/j.proeng.2012.07.460
Repić B, Erić A, Đurović DR, Marinković AD, Živković GS. Experimental determination of the swirl burner laboratory models hydraulic resistance. in Procedia Engineering. 2012;42:672-682.
doi:10.1016/j.proeng.2012.07.460 .
Repić, Branislav, Erić, Aleksandar, Đurović, Dejan R., Marinković, Ana D., Živković, Goran S., "Experimental determination of the swirl burner laboratory models hydraulic resistance" in Procedia Engineering, 42 (2012):672-682,
https://doi.org/10.1016/j.proeng.2012.07.460 . .

Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed

Mladenović, Milica R.; Dakić, Dragoljub V.; Nemoda, Stevan; Mladenovic, Rastko V.; Erić, Aleksandar; Repić, Branislav; Komatina, Mirko S.

(2012)

TY  - JOUR
AU  - Mladenović, Milica R.
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Mladenovic, Rastko V.
AU  - Erić, Aleksandar
AU  - Repić, Branislav
AU  - Komatina, Mirko S.
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4822
AB  - In this paper a method of examination of fuel suitability for fluidized bed combustion is presented. The research of combustion characteristics of low grade fractions of Lubnica brown coal in the fluidized bed by the aforementioned methodology has been carried out on a laboratory semi-industrial apparatus of 200 kW(t). Description of the experimental fluidized bed combustion facility is given, as well as experimental results, with the focus on furnace temperature distribution, in order to determine the location of the zone of intensive combustion. Based on investigation results, which are focused on combustion quality (combustion completion) as well as on satisfying the environmental protection criteria, it can be stated that the investigated coal is suitable for burning in bubbling, as well as in circulating fluidized bed.
T2  - Thermal Science
T1  - Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed
VL  - 16
IS  - 1
SP  - 297
EP  - 311
DO  - 10.2298/TSCI1201297M
ER  - 
@article{
author = "Mladenović, Milica R. and Dakić, Dragoljub V. and Nemoda, Stevan and Mladenovic, Rastko V. and Erić, Aleksandar and Repić, Branislav and Komatina, Mirko S.",
year = "2012",
abstract = "In this paper a method of examination of fuel suitability for fluidized bed combustion is presented. The research of combustion characteristics of low grade fractions of Lubnica brown coal in the fluidized bed by the aforementioned methodology has been carried out on a laboratory semi-industrial apparatus of 200 kW(t). Description of the experimental fluidized bed combustion facility is given, as well as experimental results, with the focus on furnace temperature distribution, in order to determine the location of the zone of intensive combustion. Based on investigation results, which are focused on combustion quality (combustion completion) as well as on satisfying the environmental protection criteria, it can be stated that the investigated coal is suitable for burning in bubbling, as well as in circulating fluidized bed.",
journal = "Thermal Science",
title = "Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed",
volume = "16",
number = "1",
pages = "297-311",
doi = "10.2298/TSCI1201297M"
}
Mladenović, M. R., Dakić, D. V., Nemoda, S., Mladenovic, R. V., Erić, A., Repić, B.,& Komatina, M. S.. (2012). Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed. in Thermal Science, 16(1), 297-311.
https://doi.org/10.2298/TSCI1201297M
Mladenović MR, Dakić DV, Nemoda S, Mladenovic RV, Erić A, Repić B, Komatina MS. Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed. in Thermal Science. 2012;16(1):297-311.
doi:10.2298/TSCI1201297M .
Mladenović, Milica R., Dakić, Dragoljub V., Nemoda, Stevan, Mladenovic, Rastko V., Erić, Aleksandar, Repić, Branislav, Komatina, Mirko S., "Combustion of Low Grade Fractions of Lubnica Coal in Fluidized Bed" in Thermal Science, 16, no. 1 (2012):297-311,
https://doi.org/10.2298/TSCI1201297M . .
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Experimental determination thermo physical characteristics of balled biomass

Erić, Aleksandar; Dakić, Dragoljub V.; Nemoda, Stevan; Komatina, Mirko; Repić, Branislav

(2012)

TY  - JOUR
AU  - Erić, Aleksandar
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Komatina, Mirko
AU  - Repić, Branislav
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5055
AB  - The paper presents the results of an experimental investigation conducted to determine the permeability coefficients and the stagnant thermal conductivity i.e. the thermo physical properties deemed to be the most important features of the bed material when considering combustion in pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). The appropriate experimental methods have been developed and suitable experimental apparatus designed and constructed in order to determine permeability and stagnant thermal conductivity coefficient of the soybean straw bales. The experimental investigation conducted was aimed at examining the effects of relevant biomass bale parameters on the aforementioned coefficients. Based on the numerous measurements performed, correlations were obtained that are deemed highly important for optimization of the biomass bale combustion, as well as for modeling the transport phenomena occurring in the porous bed formed during biomass bales combustion in cigar burners. Data collected during the course of research investigation were used to develop a detailed CFD model of straw bales combustion in cigar burners. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Energy
T1  - Experimental determination thermo physical characteristics of balled biomass
VL  - 45
IS  - 1
SP  - 350
EP  - 357
DO  - 10.1016/j.energy.2012.02.063
ER  - 
@article{
author = "Erić, Aleksandar and Dakić, Dragoljub V. and Nemoda, Stevan and Komatina, Mirko and Repić, Branislav",
year = "2012",
abstract = "The paper presents the results of an experimental investigation conducted to determine the permeability coefficients and the stagnant thermal conductivity i.e. the thermo physical properties deemed to be the most important features of the bed material when considering combustion in pusher-type furnaces (i.e. combustion of biomass bales in cigar burners). The appropriate experimental methods have been developed and suitable experimental apparatus designed and constructed in order to determine permeability and stagnant thermal conductivity coefficient of the soybean straw bales. The experimental investigation conducted was aimed at examining the effects of relevant biomass bale parameters on the aforementioned coefficients. Based on the numerous measurements performed, correlations were obtained that are deemed highly important for optimization of the biomass bale combustion, as well as for modeling the transport phenomena occurring in the porous bed formed during biomass bales combustion in cigar burners. Data collected during the course of research investigation were used to develop a detailed CFD model of straw bales combustion in cigar burners. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Energy",
title = "Experimental determination thermo physical characteristics of balled biomass",
volume = "45",
number = "1",
pages = "350-357",
doi = "10.1016/j.energy.2012.02.063"
}
Erić, A., Dakić, D. V., Nemoda, S., Komatina, M.,& Repić, B.. (2012). Experimental determination thermo physical characteristics of balled biomass. in Energy, 45(1), 350-357.
https://doi.org/10.1016/j.energy.2012.02.063
Erić A, Dakić DV, Nemoda S, Komatina M, Repić B. Experimental determination thermo physical characteristics of balled biomass. in Energy. 2012;45(1):350-357.
doi:10.1016/j.energy.2012.02.063 .
Erić, Aleksandar, Dakić, Dragoljub V., Nemoda, Stevan, Komatina, Mirko, Repić, Branislav, "Experimental determination thermo physical characteristics of balled biomass" in Energy, 45, no. 1 (2012):350-357,
https://doi.org/10.1016/j.energy.2012.02.063 . .
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