TY  - JOUR
AU  - Marković, Zoran
AU  - Erić, Milić
AU  - Stefanović, Predrag
AU  - Jovanović, Rastko
AU  - Lazović, Ivan
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11992
AB  - Homogeneity of the flue gas-flow through the chamber of an electrostatic precipitator is one of the basic influencing parameter on dedusting efficiency. This paper presents results of a multiobjective optimization study of the flue gas controlling devices of electrostatic precipitator of 324 MWe lignite fired Unit A4 of TPP "Nikola Tesla" in Serbia. The aim was to achieve better flow homogeneity in the cross-section of the precipitator compared to the original design. Additional constraints were to maintain the minimum as possible overall weight of the proposed design as well as pressure drop through the precipitator. Numerical simulations based on CFD were used to investigate dependence of the velocity distribution in the ducts and precipitator’s chamber with respect to the geometrical parameters of tested concepts of turning blades. A series of 22 detailed full-scale numerical models of the precipitator with different concepts of turning vanes designs were developed. Assessment of the flow field uniformity for each tested design was performed based on the analysis of several homogeneity parameters calculated for selected vertical cross-sections of the precipitator. After the reconstruction according to optimized design, results of measurements confirmed significant improvements of the velocity distribution in the vertical cross-sections of the precipitator, increase of dedusting efficiency and reduction of PM emission.
T2  - Thermal Science
T1  - Optimization of the flue gas-flow controlling devices of the electrostatic precipitator of unit A4 in TPP "Nikola Tesla"
VL  - 27
IS  - 5 Part A
SP  - 3591
EP  - 3606
DO  - 10.2298/TSCI220903024M
ER  - 

@article{
author = "Marković, Zoran and Erić, Milić and Stefanović, Predrag and Jovanović, Rastko and Lazović, Ivan",
year = "2023",
abstract = "Homogeneity of the flue gas-flow through the chamber of an electrostatic precipitator is one of the basic influencing parameter on dedusting efficiency. This paper presents results of a multiobjective optimization study of the flue gas controlling devices of electrostatic precipitator of 324 MWe lignite fired Unit A4 of TPP "Nikola Tesla" in Serbia. The aim was to achieve better flow homogeneity in the cross-section of the precipitator compared to the original design. Additional constraints were to maintain the minimum as possible overall weight of the proposed design as well as pressure drop through the precipitator. Numerical simulations based on CFD were used to investigate dependence of the velocity distribution in the ducts and precipitator’s chamber with respect to the geometrical parameters of tested concepts of turning blades. A series of 22 detailed full-scale numerical models of the precipitator with different concepts of turning vanes designs were developed. Assessment of the flow field uniformity for each tested design was performed based on the analysis of several homogeneity parameters calculated for selected vertical cross-sections of the precipitator. After the reconstruction according to optimized design, results of measurements confirmed significant improvements of the velocity distribution in the vertical cross-sections of the precipitator, increase of dedusting efficiency and reduction of PM emission.",
journal = "Thermal Science",
title = "Optimization of the flue gas-flow controlling devices of the electrostatic precipitator of unit A4 in TPP "Nikola Tesla"",
volume = "27",
number = "5 Part A",
pages = "3591-3606",
doi = "10.2298/TSCI220903024M"
}

Marković, Z., Erić, M., Stefanović, P., Jovanović, R.,& Lazović, I.. (2023). Optimization of the flue gas-flow controlling devices of the electrostatic precipitator of unit A4 in TPP "Nikola Tesla". in Thermal Science, 27(5 Part A), 3591-3606.
https://doi.org/10.2298/TSCI220903024M

Marković Z, Erić M, Stefanović P, Jovanović R, Lazović I. Optimization of the flue gas-flow controlling devices of the electrostatic precipitator of unit A4 in TPP "Nikola Tesla". in Thermal Science. 2023;27(5 Part A):3591-3606.
doi:10.2298/TSCI220903024M .

Marković, Zoran, Erić, Milić, Stefanović, Predrag, Jovanović, Rastko, Lazović, Ivan, "Optimization of the flue gas-flow controlling devices of the electrostatic precipitator of unit A4 in TPP "Nikola Tesla"" in Thermal Science, 27, no. 5 Part A (2023):3591-3606,
https://doi.org/10.2298/TSCI220903024M . .

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

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

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

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

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

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Živković, Nikola V.
AU  - Stojiljković, Dragoslava
AU  - Jovanović, Vladimir
AU  - Erić, Milić D.
AU  - Marković, Zoran J.
AU  - Cvetinović, Dejan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8987
AB  - The anthropogenic emission of GHG especially CO has to be limited and reduced due to 2 their impact on global warming and climate change. Combustion of fossil fuels in the energy sector has a dominant share in total GHG emissions. In order to reduce GHG emission, European Union established a scheme for GHG allowance trading within the community, and the implementation of the European Union emission trading scheme, which is a key to GHG reduction in a cost-effective way. An important part of emission trading scheme is prescribed methodology for monitoring, reporting, and verification of the emission of GHG including characterization of the local fuels combusted by the energy sector. This paper presents lignite characteristics from open-pit mine Borovica- Pljevlja, which has highest coal production in Montenegro (>1.2 Mt per year), including evaluation of its carbon emission factor based on the laboratory analysis of 72 coal samples. Testing of the samples included proximate and ultimate analysis, as well as, net calorific value determination. In accordance with the obtained results, linear correlations between net calorific value and combustible matter content, carbon content and combustible matter content, hydrogen content and combustible matter content, carbon content and net calorific value, were established. Finally, the non-linear analytical correlation between carbon emission factor and net calorific value for Pljevlja lignite was proposed, as a base for the precise calculation of CO emission evaluation.
T2  - Thermal Science
T1  - Pljevlja lignite carbon emission characteristics
VL  - 23
IS  - Suppl. 5
SP  - 1523
EP  - 1531
DO  - 10.2298/TSCI180726288S
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Živković, Nikola V. and Stojiljković, Dragoslava and Jovanović, Vladimir and Erić, Milić D. and Marković, Zoran J. and Cvetinović, Dejan",
year = "2019",
abstract = "The anthropogenic emission of GHG especially CO has to be limited and reduced due to 2 their impact on global warming and climate change. Combustion of fossil fuels in the energy sector has a dominant share in total GHG emissions. In order to reduce GHG emission, European Union established a scheme for GHG allowance trading within the community, and the implementation of the European Union emission trading scheme, which is a key to GHG reduction in a cost-effective way. An important part of emission trading scheme is prescribed methodology for monitoring, reporting, and verification of the emission of GHG including characterization of the local fuels combusted by the energy sector. This paper presents lignite characteristics from open-pit mine Borovica- Pljevlja, which has highest coal production in Montenegro (>1.2 Mt per year), including evaluation of its carbon emission factor based on the laboratory analysis of 72 coal samples. Testing of the samples included proximate and ultimate analysis, as well as, net calorific value determination. In accordance with the obtained results, linear correlations between net calorific value and combustible matter content, carbon content and combustible matter content, hydrogen content and combustible matter content, carbon content and net calorific value, were established. Finally, the non-linear analytical correlation between carbon emission factor and net calorific value for Pljevlja lignite was proposed, as a base for the precise calculation of CO emission evaluation.",
journal = "Thermal Science",
title = "Pljevlja lignite carbon emission characteristics",
volume = "23",
number = "Suppl. 5",
pages = "1523-1531",
doi = "10.2298/TSCI180726288S"
}

Stefanović, P. Lj., Živković, N. V., Stojiljković, D., Jovanović, V., Erić, M. D., Marković, Z. J.,& Cvetinović, D.. (2019). Pljevlja lignite carbon emission characteristics. in Thermal Science, 23(Suppl. 5), 1523-1531.
https://doi.org/10.2298/TSCI180726288S

Stefanović PL, Živković NV, Stojiljković D, Jovanović V, Erić MD, Marković ZJ, Cvetinović D. Pljevlja lignite carbon emission characteristics. in Thermal Science. 2019;23(Suppl. 5):1523-1531.
doi:10.2298/TSCI180726288S .

Stefanović, Predrag Lj., Živković, Nikola V., Stojiljković, Dragoslava, Jovanović, Vladimir, Erić, Milić D., Marković, Zoran J., Cvetinović, Dejan, "Pljevlja lignite carbon emission characteristics" in Thermal Science, 23, no. Suppl. 5 (2019):1523-1531,
https://doi.org/10.2298/TSCI180726288S . .

TY  - CONF
AU  - Marković, Zoran J.
AU  - Erić, Milić D.
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12786
PB  - Niš : University of Niš, Faculty of Mechanical Engineering
C3  - 19th Conference on Thermal Science and Engineering of Serbia with the accompanying exhibition of equipment and achievements : Proceedings
T1  - Problem of Gas Distribution in Electrostatic Precipitators of Unit A4 in TPP Nikola Tesla
SP  - 470
EP  - 485
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12786
ER  - 

@conference{
author = "Marković, Zoran J. and Erić, Milić D. and Stefanović, Predrag Lj. and Cvetinović, Dejan",
year = "2019",
publisher = "Niš : University of Niš, Faculty of Mechanical Engineering",
journal = "19th Conference on Thermal Science and Engineering of Serbia with the accompanying exhibition of equipment and achievements : Proceedings",
title = "Problem of Gas Distribution in Electrostatic Precipitators of Unit A4 in TPP Nikola Tesla",
pages = "470-485",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12786"
}

Marković, Z. J., Erić, M. D., Stefanović, P. Lj.,& Cvetinović, D.. (2019). Problem of Gas Distribution in Electrostatic Precipitators of Unit A4 in TPP Nikola Tesla. in 19th Conference on Thermal Science and Engineering of Serbia with the accompanying exhibition of equipment and achievements : Proceedings
Niš : University of Niš, Faculty of Mechanical Engineering., 470-485.
https://hdl.handle.net/21.15107/rcub_vinar_12786

Marković ZJ, Erić MD, Stefanović PL, Cvetinović D. Problem of Gas Distribution in Electrostatic Precipitators of Unit A4 in TPP Nikola Tesla. in 19th Conference on Thermal Science and Engineering of Serbia with the accompanying exhibition of equipment and achievements : Proceedings. 2019;:470-485.
https://hdl.handle.net/21.15107/rcub_vinar_12786 .

Marković, Zoran J., Erić, Milić D., Stefanović, Predrag Lj., Cvetinović, Dejan, "Problem of Gas Distribution in Electrostatic Precipitators of Unit A4 in TPP Nikola Tesla" in 19th Conference on Thermal Science and Engineering of Serbia with the accompanying exhibition of equipment and achievements : Proceedings (2019):470-485,
https://hdl.handle.net/21.15107/rcub_vinar_12786 .

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

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

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

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

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

TY  - JOUR
AU  - Erić, Milić
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran J.
AU  - Jovanović, Rastko D.
AU  - Lazović, Ivan
AU  - Živković, Nikola V.
AU  - Ilić, Željko
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0354-983618623E
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8030
AB  - The electrostatic precipitator system of the lignite fired 350 MWe unit B1 of Thermal Power Plant Kostolac B has been modernized during 2014. The results of complex in site measurements, performed in the frame of performance control test at the beginning of the exploitation period of the upgraded electrostatic pre-cipitator proved that, under normal and guarantee working conditions of the boiler and precipitator, the emission of particulate matter do not exceed limiting value. After the period of precipitator further adjustments, five series of meas-urements in the frame of acceptance test were performed in accordance with rel-evant standards. This paper presents results of the investigation of particulate matter concentration, laboratory analysis of the lignite, fly and bottom ash sam-ples, working parameters of the unit and upgraded electrostatic precipitator as well as results of the calculations. The averaged mean particulate concentration at the exit of upgraded electrostatic precipitator of the unit B1 during Acceptance test was below guaranteed value. It is confirmed that adjustments of electrostatic precipitator electrical parameters have improved electrostatic precipitator effi-ciency, as well that electrostatic precipitatorcould work highly efficiently in en-ergy save mode with lower power consumption. © 2018 Society of Thermal Engineers of Serbia.
T2  - Thermal Science
T1  - Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B
VL  - 22
IS  - Suppl. 5
SP  - 1623
EP  - 1634
DO  - 10.2298/TSCI18S5623E
ER  - 

@article{
author = "Erić, Milić and Stefanović, Predrag Lj. and Marković, Zoran J. and Jovanović, Rastko D. and Lazović, Ivan and Živković, Nikola V. and Ilić, Željko",
year = "2018",
abstract = "The electrostatic precipitator system of the lignite fired 350 MWe unit B1 of Thermal Power Plant Kostolac B has been modernized during 2014. The results of complex in site measurements, performed in the frame of performance control test at the beginning of the exploitation period of the upgraded electrostatic pre-cipitator proved that, under normal and guarantee working conditions of the boiler and precipitator, the emission of particulate matter do not exceed limiting value. After the period of precipitator further adjustments, five series of meas-urements in the frame of acceptance test were performed in accordance with rel-evant standards. This paper presents results of the investigation of particulate matter concentration, laboratory analysis of the lignite, fly and bottom ash sam-ples, working parameters of the unit and upgraded electrostatic precipitator as well as results of the calculations. The averaged mean particulate concentration at the exit of upgraded electrostatic precipitator of the unit B1 during Acceptance test was below guaranteed value. It is confirmed that adjustments of electrostatic precipitator electrical parameters have improved electrostatic precipitator effi-ciency, as well that electrostatic precipitatorcould work highly efficiently in en-ergy save mode with lower power consumption. © 2018 Society of Thermal Engineers of Serbia.",
journal = "Thermal Science",
title = "Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B",
volume = "22",
number = "Suppl. 5",
pages = "1623-1634",
doi = "10.2298/TSCI18S5623E"
}

Erić, M., Stefanović, P. Lj., Marković, Z. J., Jovanović, R. D., Lazović, I., Živković, N. V.,& Ilić, Ž.. (2018). Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B. in Thermal Science, 22(Suppl. 5), 1623-1634.
https://doi.org/10.2298/TSCI18S5623E

Erić M, Stefanović PL, Marković ZJ, Jovanović RD, Lazović I, Živković NV, Ilić Ž. Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B. in Thermal Science. 2018;22(Suppl. 5):1623-1634.
doi:10.2298/TSCI18S5623E .

Erić, Milić, Stefanović, Predrag Lj., Marković, Zoran J., Jovanović, Rastko D., Lazović, Ivan, Živković, Nikola V., Ilić, Željko, "Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B" in Thermal Science, 22, no. Suppl. 5 (2018):1623-1634,
https://doi.org/10.2298/TSCI18S5623E . .

TY  - JOUR
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Bakić, Vukman
AU  - Oka, Simeon N.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7196
AB  - Paper gives a review of the most important results of turbulence research achieved by the Laboratory for Thermal Engineering and Energy at the Vinca Insitute of Nuclear Sciences. Paper presents detailed overview of the history of the scientific research provided in the laboratory, from the beginning in the mid-60s to today, pointing out the main reasons initiating the investigations in this field. After the first period, which was mainly devoted to the research of the structure of the turbulence, since the beginning of the 80s, research is mainly oriented to the flows at high temperatures including chemical reactions and to the development and improvement of differential mathematical models as a modern and very efficient tool in the technological development. This research significantly contributed to the development of pulverized coal burners, plasma-chemical reactors, and optimization of pulverized coal fired boilers operating parameters and prediction of the greenhouse gases emissions. Most recent period includes experimental and numerical studies of the coherent structures in turbulent fluid jets, mathematical modeling of various turbulent thermal flow processes including two-phase turbulent flow in the multiphase heat exchangers and mathematical modeling of the atmospheric boundary layer.
T2  - Thermal Science
T1  - Review of the Research on the Turbulence in the Laboratory for Thermal Engineering and Energy
VL  - 21
SP  - S875
EP  - S898
DO  - 10.2298/TSCI160221330C
ER  - 

@article{
author = "Cvetinović, Dejan and Stefanović, Predrag Lj. and Bakić, Vukman and Oka, Simeon N.",
year = "2017",
abstract = "Paper gives a review of the most important results of turbulence research achieved by the Laboratory for Thermal Engineering and Energy at the Vinca Insitute of Nuclear Sciences. Paper presents detailed overview of the history of the scientific research provided in the laboratory, from the beginning in the mid-60s to today, pointing out the main reasons initiating the investigations in this field. After the first period, which was mainly devoted to the research of the structure of the turbulence, since the beginning of the 80s, research is mainly oriented to the flows at high temperatures including chemical reactions and to the development and improvement of differential mathematical models as a modern and very efficient tool in the technological development. This research significantly contributed to the development of pulverized coal burners, plasma-chemical reactors, and optimization of pulverized coal fired boilers operating parameters and prediction of the greenhouse gases emissions. Most recent period includes experimental and numerical studies of the coherent structures in turbulent fluid jets, mathematical modeling of various turbulent thermal flow processes including two-phase turbulent flow in the multiphase heat exchangers and mathematical modeling of the atmospheric boundary layer.",
journal = "Thermal Science",
title = "Review of the Research on the Turbulence in the Laboratory for Thermal Engineering and Energy",
volume = "21",
pages = "S875-S898",
doi = "10.2298/TSCI160221330C"
}

Cvetinović, D., Stefanović, P. Lj., Bakić, V.,& Oka, S. N.. (2017). Review of the Research on the Turbulence in the Laboratory for Thermal Engineering and Energy. in Thermal Science, 21, S875-S898.
https://doi.org/10.2298/TSCI160221330C

Cvetinović D, Stefanović PL, Bakić V, Oka SN. Review of the Research on the Turbulence in the Laboratory for Thermal Engineering and Energy. in Thermal Science. 2017;21:S875-S898.
doi:10.2298/TSCI160221330C .

Cvetinović, Dejan, Stefanović, Predrag Lj., Bakić, Vukman, Oka, Simeon N., "Review of the Research on the Turbulence in the Laboratory for Thermal Engineering and Energy" in Thermal Science, 21 (2017):S875-S898,
https://doi.org/10.2298/TSCI160221330C . .

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Škobalj, Predrag D.
AU  - Marković, Zoran J.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1145
AB  - New system for start-up and flame support based on coal gasification by low temperature air thermal plasma is planned to supplement current heavy oil system in Serbian thermal power plants in order to decrease air pollutions emission and operational costs. Locally introduced plasma thermal energy heats up and ignites entrained coal particles, thus starting chain process which releases heat energy from gasified coal particles inside burner channel. Important stages during particle combustion, such as particle devolatilisation and char combustion, are described with satisfying accuracy in existing commercial computer fluid dynamics codes that are extensively used as powerful tool for pulverized coal combustion and gasification modeling. However, during plasma coal gasification, high plasma temperature induces strong thermal stresses inside interacting coal particles. These stresses lead to thermal shock and extensive particle fragmentation during which coal particles with initial size of 50-100 mu m disintegrate into fragments of at most 5-10 mu m. This intensifies volatile release by a factor 3-4 and substantially accelerates the oxidation of combustible matter. Particle fragmentation, due to its small size and thus limited influence on combustion process is commonly neglected in modelling. The main focus of this work is to suggest novel approach to pulverized coal gasification under high temperature conditions and to implement it into commercial comprehensive code ANSYS FLUENT 14.0. Proposed model was validated against experimental data obtained in newly built pilot scale direct current plasma burner test facility. Newly developed model showed very good agreement with experimental results with relative error less than 10%, while the standard built-in gasification model had error up to 25%.
T2  - Thermal Science
T1  - Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma
VL  - 20
SP  - S207
EP  - S221
DO  - 10.2298/TSCI151222015J
ER  - 

@article{
author = "Jovanović, Rastko D. and Cvetinović, Dejan and Stefanović, Predrag Lj. and Škobalj, Predrag D. and Marković, Zoran J.",
year = "2016",
abstract = "New system for start-up and flame support based on coal gasification by low temperature air thermal plasma is planned to supplement current heavy oil system in Serbian thermal power plants in order to decrease air pollutions emission and operational costs. Locally introduced plasma thermal energy heats up and ignites entrained coal particles, thus starting chain process which releases heat energy from gasified coal particles inside burner channel. Important stages during particle combustion, such as particle devolatilisation and char combustion, are described with satisfying accuracy in existing commercial computer fluid dynamics codes that are extensively used as powerful tool for pulverized coal combustion and gasification modeling. However, during plasma coal gasification, high plasma temperature induces strong thermal stresses inside interacting coal particles. These stresses lead to thermal shock and extensive particle fragmentation during which coal particles with initial size of 50-100 mu m disintegrate into fragments of at most 5-10 mu m. This intensifies volatile release by a factor 3-4 and substantially accelerates the oxidation of combustible matter. Particle fragmentation, due to its small size and thus limited influence on combustion process is commonly neglected in modelling. The main focus of this work is to suggest novel approach to pulverized coal gasification under high temperature conditions and to implement it into commercial comprehensive code ANSYS FLUENT 14.0. Proposed model was validated against experimental data obtained in newly built pilot scale direct current plasma burner test facility. Newly developed model showed very good agreement with experimental results with relative error less than 10%, while the standard built-in gasification model had error up to 25%.",
journal = "Thermal Science",
title = "Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma",
volume = "20",
pages = "S207-S221",
doi = "10.2298/TSCI151222015J"
}

Jovanović, R. D., Cvetinović, D., Stefanović, P. Lj., Škobalj, P. D.,& Marković, Z. J.. (2016). Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma. in Thermal Science, 20, S207-S221.
https://doi.org/10.2298/TSCI151222015J

Jovanović RD, Cvetinović D, Stefanović PL, Škobalj PD, Marković ZJ. Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma. in Thermal Science. 2016;20:S207-S221.
doi:10.2298/TSCI151222015J .

Jovanović, Rastko D., Cvetinović, Dejan, Stefanović, Predrag Lj., Škobalj, Predrag D., Marković, Zoran J., "Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma" in Thermal Science, 20 (2016):S207-S221,
https://doi.org/10.2298/TSCI151222015J . .

TY  - JOUR
AU  - Marković, Zoran J.
AU  - Stupar, Slobodan N.
AU  - Dinulovic, Mirko R.
AU  - Pekovic, Ognjen M.
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1147
AB  - A fuzzy approximation concept is applied in order to predict results of coupled computational structure mechanics and computational fluid dynamics while solving a problem of steady incompressible gas flow through thermally loaded rectangular thin-walled channel. Channel wall deforms into wave-type shapes depending on thermal load and fluid inlet velocity inducing the changes of fluid flow accordingly. A set of fluid-structure interaction numerical tests have been defined by varying the values of fluid inlet velocity, temperature of inner and outer surface of the channel wall, and numerical grid density. The unsteady Navier-Stokes equations are numerically solved using an element-based finite volume method and second order backward Euler discretization scheme. The structural model is solved by finite element method including geometric and material non-linearities. The implicit two-way iterative code coupling, partitioned solution approach, were used while solving these numerical tests. Results of numerical analysis indicate that gravity and pressure distribution inside the channel contributes to triggering the shape of deformation. In the inverse problem, the results of fluid-structure interaction numerical simulations formed a database of input variables for development fuzzy logic based models considering downstream pressure drop and maximum stresses as the objective functions. Developed fuzzy models predicted targeting results within a reasonable accuracy limit at lower computation cost compared to series of fluid-structure interaction numerical calculations. Smaller relative difference were obtained when calculating the values of pressure drop then maximal stresses indicating that transfer function influence on output values have to be additionally investigated.
T2  - Thermal Science
T1  - Assessment Results of Fluid-Structure Interaction Numerical Simulation Using Fuzzy Logic
VL  - 20
SP  - S235
EP  - S250
DO  - 10.2298/TSCI160111083M
ER  - 

@article{
author = "Marković, Zoran J. and Stupar, Slobodan N. and Dinulovic, Mirko R. and Pekovic, Ognjen M. and Stefanović, Predrag Lj. and Cvetinović, Dejan",
year = "2016",
abstract = "A fuzzy approximation concept is applied in order to predict results of coupled computational structure mechanics and computational fluid dynamics while solving a problem of steady incompressible gas flow through thermally loaded rectangular thin-walled channel. Channel wall deforms into wave-type shapes depending on thermal load and fluid inlet velocity inducing the changes of fluid flow accordingly. A set of fluid-structure interaction numerical tests have been defined by varying the values of fluid inlet velocity, temperature of inner and outer surface of the channel wall, and numerical grid density. The unsteady Navier-Stokes equations are numerically solved using an element-based finite volume method and second order backward Euler discretization scheme. The structural model is solved by finite element method including geometric and material non-linearities. The implicit two-way iterative code coupling, partitioned solution approach, were used while solving these numerical tests. Results of numerical analysis indicate that gravity and pressure distribution inside the channel contributes to triggering the shape of deformation. In the inverse problem, the results of fluid-structure interaction numerical simulations formed a database of input variables for development fuzzy logic based models considering downstream pressure drop and maximum stresses as the objective functions. Developed fuzzy models predicted targeting results within a reasonable accuracy limit at lower computation cost compared to series of fluid-structure interaction numerical calculations. Smaller relative difference were obtained when calculating the values of pressure drop then maximal stresses indicating that transfer function influence on output values have to be additionally investigated.",
journal = "Thermal Science",
title = "Assessment Results of Fluid-Structure Interaction Numerical Simulation Using Fuzzy Logic",
volume = "20",
pages = "S235-S250",
doi = "10.2298/TSCI160111083M"
}

Marković, Z. J., Stupar, S. N., Dinulovic, M. R., Pekovic, O. M., Stefanović, P. Lj.,& Cvetinović, D.. (2016). Assessment Results of Fluid-Structure Interaction Numerical Simulation Using Fuzzy Logic. in Thermal Science, 20, S235-S250.
https://doi.org/10.2298/TSCI160111083M

Marković ZJ, Stupar SN, Dinulovic MR, Pekovic OM, Stefanović PL, Cvetinović D. Assessment Results of Fluid-Structure Interaction Numerical Simulation Using Fuzzy Logic. in Thermal Science. 2016;20:S235-S250.
doi:10.2298/TSCI160111083M .

Marković, Zoran J., Stupar, Slobodan N., Dinulovic, Mirko R., Pekovic, Ognjen M., Stefanović, Predrag Lj., Cvetinović, Dejan, "Assessment Results of Fluid-Structure Interaction Numerical Simulation Using Fuzzy Logic" in Thermal Science, 20 (2016):S235-S250,
https://doi.org/10.2298/TSCI160111083M . .

TY  - JOUR
AU  - Erić, Milić
AU  - Stefanović, Predrag
AU  - Marković, Zoran
AU  - Škobalj, Predrag
AU  - Cvetinović, Dejan
AU  - Jovanović, Rastko
AU  - Lazović, Ivan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12111
AB  - U odgovarajuće propise domaćeg zakonodavstva uključeni su zahtevi iz međunarodnog dokumenta, Direktiva 2001/80/EC, koji se odnose na ograničenje emisije praškastih materija iz velikih termoenergetskih postrojenja. Shodno preuzetim obavezama, od 2005. godine započelo se sa rekonstrukcijama i modernizacijama elektrofilterskih postrojenja svih termoblokova u sastavu JP EPS. Na termoelektrani 'Nikola Tesla B' je tokom 2011. godine izvršena rekonstrukcija i modernizacija elektrofilterskog postrojenja bloka B2, dok je rekonstrukcija elektrofilterskog postrojenja bloka B1 obavljena tokom 2012. godine. Cilj obavljenih rekonstrukcija, finansiranih donacijama Evropske Unije, bio je da se emisija praškastih materija u dimnom gasu iz ovih blokova spusti na nivo ispod 50 mg/Nm3, za normalne uslove i pri garantovanim radnim uslovima kotla i elektrofilterskog postrojenja. U radu su prikazani rezultati merenja koncentracija praškastih materija u dimnom gasu iza elektrofiltera, obavljenih u skladu sa zahtevima međunarodnih standarda ISO 9096 i EN 13284-1 nakon rekonstrukcije elektrofilterskih postrojenja termoelektrane TENT B, kao i rezultati ispitivanja obavljenih nakon isteka perioda od godinu dana od završetka rekonstrukcija. Dobijeni rezultati potvrđuju da je izlazna koncentracija praškastih materija ispod garantovane vrednosti, čime je potvrđena uspešnosti izvedenih rekonstruktivnih zahvata.
AB  - The requirements of the international document Directive 2001/80/EC relating to limitation of the particulate matter emissions from large thermal power plants have been incorporated into relevant regulations of domestic legislation. In accordance with the commitments, since 2005 it was started with reconstruction and modernization of electrostatic precipitator system of all thermal units within the Electric Power Industry of Serbia. The reconstruction and modernization of electrostatic precipitator system of the unit B2 of thermal power plant 'Nikola Tesla B' was done during 2011, while the reconstruction of the electrostatic precipitator system of the unit B1 was conducted in 2012 year. One of the main objectives of performed reconstructions and modernizations, financed by donations of the European Union, was to decrease the emission of particulate matter in the flue gas from these units down to level below 50 mg/Nm3, in normal conditions and under guaranteed operating conditions of the boiler and electrostatic precipitator system. This paper presents results of the measurements of particulate matter concentration performed in accordance with standards ISO 9096 and EN 13284-1, immediately after the reconstruction and shortly before the end of the period of about 1 year after the reconstruction, as a part of control and guarantee investigations of the reconstructed electrostatic precipitators of Thermal Power Plant Nikola Tesla B units. In addition, this paper presents re sults of labosatory analysis of the coal samples taken during test, working parameters of the unit and upgraded electrostatic precipitator system during the tests as well as results of the calculations. The results of the measurements confirm that particulate matter concentration in the flue gas from reconstructed electrostatic precipitators fall down below guaranteed values, thus confirming the effectiveness of the reconstructive operations.
T2  - Termotehnika
T1  - Smanjenje emisije praškastih materija posle rekonstrukcije i modernizacije elektrofilterskih postrojenja na TE „Nikola Tesla B”
VL  - 42
IS  - 1-2
SP  - 73
EP  - 83
DO  - 10.5937/termoteh1601073E
ER  - 

@article{
author = "Erić, Milić and Stefanović, Predrag and Marković, Zoran and Škobalj, Predrag and Cvetinović, Dejan and Jovanović, Rastko and Lazović, Ivan",
year = "2016",
abstract = "U odgovarajuće propise domaćeg zakonodavstva uključeni su zahtevi iz međunarodnog dokumenta, Direktiva 2001/80/EC, koji se odnose na ograničenje emisije praškastih materija iz velikih termoenergetskih postrojenja. Shodno preuzetim obavezama, od 2005. godine započelo se sa rekonstrukcijama i modernizacijama elektrofilterskih postrojenja svih termoblokova u sastavu JP EPS. Na termoelektrani 'Nikola Tesla B' je tokom 2011. godine izvršena rekonstrukcija i modernizacija elektrofilterskog postrojenja bloka B2, dok je rekonstrukcija elektrofilterskog postrojenja bloka B1 obavljena tokom 2012. godine. Cilj obavljenih rekonstrukcija, finansiranih donacijama Evropske Unije, bio je da se emisija praškastih materija u dimnom gasu iz ovih blokova spusti na nivo ispod 50 mg/Nm3, za normalne uslove i pri garantovanim radnim uslovima kotla i elektrofilterskog postrojenja. U radu su prikazani rezultati merenja koncentracija praškastih materija u dimnom gasu iza elektrofiltera, obavljenih u skladu sa zahtevima međunarodnih standarda ISO 9096 i EN 13284-1 nakon rekonstrukcije elektrofilterskih postrojenja termoelektrane TENT B, kao i rezultati ispitivanja obavljenih nakon isteka perioda od godinu dana od završetka rekonstrukcija. Dobijeni rezultati potvrđuju da je izlazna koncentracija praškastih materija ispod garantovane vrednosti, čime je potvrđena uspešnosti izvedenih rekonstruktivnih zahvata., The requirements of the international document Directive 2001/80/EC relating to limitation of the particulate matter emissions from large thermal power plants have been incorporated into relevant regulations of domestic legislation. In accordance with the commitments, since 2005 it was started with reconstruction and modernization of electrostatic precipitator system of all thermal units within the Electric Power Industry of Serbia. The reconstruction and modernization of electrostatic precipitator system of the unit B2 of thermal power plant 'Nikola Tesla B' was done during 2011, while the reconstruction of the electrostatic precipitator system of the unit B1 was conducted in 2012 year. One of the main objectives of performed reconstructions and modernizations, financed by donations of the European Union, was to decrease the emission of particulate matter in the flue gas from these units down to level below 50 mg/Nm3, in normal conditions and under guaranteed operating conditions of the boiler and electrostatic precipitator system. This paper presents results of the measurements of particulate matter concentration performed in accordance with standards ISO 9096 and EN 13284-1, immediately after the reconstruction and shortly before the end of the period of about 1 year after the reconstruction, as a part of control and guarantee investigations of the reconstructed electrostatic precipitators of Thermal Power Plant Nikola Tesla B units. In addition, this paper presents re sults of labosatory analysis of the coal samples taken during test, working parameters of the unit and upgraded electrostatic precipitator system during the tests as well as results of the calculations. The results of the measurements confirm that particulate matter concentration in the flue gas from reconstructed electrostatic precipitators fall down below guaranteed values, thus confirming the effectiveness of the reconstructive operations.",
journal = "Termotehnika",
title = "Smanjenje emisije praškastih materija posle rekonstrukcije i modernizacije elektrofilterskih postrojenja na TE „Nikola Tesla B”",
volume = "42",
number = "1-2",
pages = "73-83",
doi = "10.5937/termoteh1601073E"
}

Erić, M., Stefanović, P., Marković, Z., Škobalj, P., Cvetinović, D., Jovanović, R.,& Lazović, I.. (2016). Smanjenje emisije praškastih materija posle rekonstrukcije i modernizacije elektrofilterskih postrojenja na TE „Nikola Tesla B”. in Termotehnika, 42(1-2), 73-83.
https://doi.org/10.5937/termoteh1601073E

Erić M, Stefanović P, Marković Z, Škobalj P, Cvetinović D, Jovanović R, Lazović I. Smanjenje emisije praškastih materija posle rekonstrukcije i modernizacije elektrofilterskih postrojenja na TE „Nikola Tesla B”. in Termotehnika. 2016;42(1-2):73-83.
doi:10.5937/termoteh1601073E .

Erić, Milić, Stefanović, Predrag, Marković, Zoran, Škobalj, Predrag, Cvetinović, Dejan, Jovanović, Rastko, Lazović, Ivan, "Smanjenje emisije praškastih materija posle rekonstrukcije i modernizacije elektrofilterskih postrojenja na TE „Nikola Tesla B”" in Termotehnika, 42, no. 1-2 (2016):73-83,
https://doi.org/10.5937/termoteh1601073E . .

TY  - CONF
AU  - Živković, Nikola
AU  - Stefanović, Predrag
AU  - Kijevčanin, Mirjana
AU  - Živković, Emila
AU  - Spasojević, Vuk
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12114
AB  - In addition to lime / limestone process, the most common procedure for sulfur-dioxide (SO2) removal from flue gases, separation processes with physical absorption and liquid organic solvent thermal regeneration recently gained importance. Organic liquid solvent selection, ahead of other process parameters, is crucial for process separation efficiency, in terms of the amount of SO2 absorbed by the solvent. The paper presents literature review and analysis of SO2 solubility in currently used and potential liquid organic solvents, polyethylene glycols (PEG 200 and PEG 400), tetraethylene glycol dimethyl ether (TEGDME), 1-methyl-2-pyrrolidone (NMP) as well as their binary mixtures with other components. The solvents in question bind SO2 by physical absorption mechanism, with the exception of NMP which binds SO2 by two parallel mechanisms, physical and chemical absorption. Research have even shown that mixtures of physical and chemical solvents or presence of both absorption mechanisms sometimes show better characteristics regarding binding capacity and selectivity. The importance of ionic liquids, as future solvents for separation processes, is particularly highlighted, due to their favorable thermophysical properties.
AB  - Pored najrasprostranjenijeg, krečnjačkog postupka, za uklanjnje sumpor-dioksida (SO2) iz dimnih gasova, u novije vreme sve veći značaj dobijaju separacioni postupci sa fizičkom apsorpcijom i termičkom regeneracijom tečnog organskog solventa. Izbor solventa, ispred drugih procesnih parametara, ključan je za efikasnost procesa u pogledu stepena izdvajanja SO2. U radu je dat literaturni pregled i analiza rastvoljivosti SO2 u trenutno korišćenim i potencijalnim tečnim organskim solventima, polietilen glikolima (PEG 200 i PEG 400), tetraetilen glikol dimetil etru (TEGDME), 1-metil-2-pirolidonu (NMP) i za njihove binarne smeše sa drugim komponentama. Razmatrani solventi vezuju SO2 mehanizmom fizičke apsorpcije, sa izuzetkom NMP-a kod koga su prisutna dva paralelna mehanizma, fizička i hemijska apsorpcija. Istraživanja su čak pokazala da smeše fizičkih i hemijskih solvenata ili smeše u kojima su prisutni mehanizmi i fizičke i hemijska apsorpcije ponekad pokazuju bolje karaktristike u pogledu stepena izdvajanja i selektivnosti. Posebno je istaknut značaj jonskih tečnosti kao solvenata budućnosti za separacione proces, zbog svojih povoljnih termofizičkih svojstava.
C3  - Power Plants 2016 : Proceeding of International Conference
T1  - Organic solvents review for sulphur-dioxide absorption from flue gases for regenerative processes with physical absorption
SP  - 896
EP  - 905
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12114
ER  - 

@conference{
author = "Živković, Nikola and Stefanović, Predrag and Kijevčanin, Mirjana and Živković, Emila and Spasojević, Vuk",
year = "2016",
abstract = "In addition to lime / limestone process, the most common procedure for sulfur-dioxide (SO2) removal from flue gases, separation processes with physical absorption and liquid organic solvent thermal regeneration recently gained importance. Organic liquid solvent selection, ahead of other process parameters, is crucial for process separation efficiency, in terms of the amount of SO2 absorbed by the solvent. The paper presents literature review and analysis of SO2 solubility in currently used and potential liquid organic solvents, polyethylene glycols (PEG 200 and PEG 400), tetraethylene glycol dimethyl ether (TEGDME), 1-methyl-2-pyrrolidone (NMP) as well as their binary mixtures with other components. The solvents in question bind SO2 by physical absorption mechanism, with the exception of NMP which binds SO2 by two parallel mechanisms, physical and chemical absorption. Research have even shown that mixtures of physical and chemical solvents or presence of both absorption mechanisms sometimes show better characteristics regarding binding capacity and selectivity. The importance of ionic liquids, as future solvents for separation processes, is particularly highlighted, due to their favorable thermophysical properties., Pored najrasprostranjenijeg, krečnjačkog postupka, za uklanjnje sumpor-dioksida (SO2) iz dimnih gasova, u novije vreme sve veći značaj dobijaju separacioni postupci sa fizičkom apsorpcijom i termičkom regeneracijom tečnog organskog solventa. Izbor solventa, ispred drugih procesnih parametara, ključan je za efikasnost procesa u pogledu stepena izdvajanja SO2. U radu je dat literaturni pregled i analiza rastvoljivosti SO2 u trenutno korišćenim i potencijalnim tečnim organskim solventima, polietilen glikolima (PEG 200 i PEG 400), tetraetilen glikol dimetil etru (TEGDME), 1-metil-2-pirolidonu (NMP) i za njihove binarne smeše sa drugim komponentama. Razmatrani solventi vezuju SO2 mehanizmom fizičke apsorpcije, sa izuzetkom NMP-a kod koga su prisutna dva paralelna mehanizma, fizička i hemijska apsorpcija. Istraživanja su čak pokazala da smeše fizičkih i hemijskih solvenata ili smeše u kojima su prisutni mehanizmi i fizičke i hemijska apsorpcije ponekad pokazuju bolje karaktristike u pogledu stepena izdvajanja i selektivnosti. Posebno je istaknut značaj jonskih tečnosti kao solvenata budućnosti za separacione proces, zbog svojih povoljnih termofizičkih svojstava.",
journal = "Power Plants 2016 : Proceeding of International Conference",
title = "Organic solvents review for sulphur-dioxide absorption from flue gases for regenerative processes with physical absorption",
pages = "896-905",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12114"
}

Živković, N., Stefanović, P., Kijevčanin, M., Živković, E.,& Spasojević, V.. (2016). Organic solvents review for sulphur-dioxide absorption from flue gases for regenerative processes with physical absorption. in Power Plants 2016 : Proceeding of International Conference, 896-905.
https://hdl.handle.net/21.15107/rcub_vinar_12114

Živković N, Stefanović P, Kijevčanin M, Živković E, Spasojević V. Organic solvents review for sulphur-dioxide absorption from flue gases for regenerative processes with physical absorption. in Power Plants 2016 : Proceeding of International Conference. 2016;:896-905.
https://hdl.handle.net/21.15107/rcub_vinar_12114 .

Živković, Nikola, Stefanović, Predrag, Kijevčanin, Mirjana, Živković, Emila, Spasojević, Vuk, "Organic solvents review for sulphur-dioxide absorption from flue gases for regenerative processes with physical absorption" in Power Plants 2016 : Proceeding of International Conference (2016):896-905,
https://hdl.handle.net/21.15107/rcub_vinar_12114 .

TY  - JOUR
AU  - Živković, Saša Ž.
AU  - Milinović, Momčilo M.
AU  - Stefanović, Predrag Lj.
AU  - Pavlović, Pavle B.
AU  - Gligorijević, Nikola I.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1150
AB  - The paper discusses the temperature changes in mechanical jet tabs in a system of rocket motor thrust vector control, estimated by the simulation and experimental tests methodology. The heat transfer calculation is based on complex computational fluid dynamics simulations of both the nozzle and external tab flows, as the comprehensive integral flow zones with high flow parameters gradients. Due to a complexity of the model for flow calculations, the experimental estimation of the calculated results is carried out. The temperature is measured by jet tabs embedded thermocouples, and conducted through the rocket motor static tests. A good agreement of the calculated and measured results is achieved. The main aim of the developed method is to establish an approved calculation tool for designing new thurst vector control systems in order to avoid disadvantages due to overheating.
T2  - Thermal Science
T1  - Experimental and Simulation Testing of Thermal Loading in the Jet Tabs of a Thrust Vector Control System
VL  - 20
SP  - S275
EP  - S286
DO  - 10.2298/TSCI150914208Z
ER  - 

@article{
author = "Živković, Saša Ž. and Milinović, Momčilo M. and Stefanović, Predrag Lj. and Pavlović, Pavle B. and Gligorijević, Nikola I.",
year = "2016",
abstract = "The paper discusses the temperature changes in mechanical jet tabs in a system of rocket motor thrust vector control, estimated by the simulation and experimental tests methodology. The heat transfer calculation is based on complex computational fluid dynamics simulations of both the nozzle and external tab flows, as the comprehensive integral flow zones with high flow parameters gradients. Due to a complexity of the model for flow calculations, the experimental estimation of the calculated results is carried out. The temperature is measured by jet tabs embedded thermocouples, and conducted through the rocket motor static tests. A good agreement of the calculated and measured results is achieved. The main aim of the developed method is to establish an approved calculation tool for designing new thurst vector control systems in order to avoid disadvantages due to overheating.",
journal = "Thermal Science",
title = "Experimental and Simulation Testing of Thermal Loading in the Jet Tabs of a Thrust Vector Control System",
volume = "20",
pages = "S275-S286",
doi = "10.2298/TSCI150914208Z"
}

Živković, S. Ž., Milinović, M. M., Stefanović, P. Lj., Pavlović, P. B.,& Gligorijević, N. I.. (2016). Experimental and Simulation Testing of Thermal Loading in the Jet Tabs of a Thrust Vector Control System. in Thermal Science, 20, S275-S286.
https://doi.org/10.2298/TSCI150914208Z

Živković SŽ, Milinović MM, Stefanović PL, Pavlović PB, Gligorijević NI. Experimental and Simulation Testing of Thermal Loading in the Jet Tabs of a Thrust Vector Control System. in Thermal Science. 2016;20:S275-S286.
doi:10.2298/TSCI150914208Z .

Živković, Saša Ž., Milinović, Momčilo M., Stefanović, Predrag Lj., Pavlović, Pavle B., Gligorijević, Nikola I., "Experimental and Simulation Testing of Thermal Loading in the Jet Tabs of a Thrust Vector Control System" in Thermal Science, 20 (2016):S275-S286,
https://doi.org/10.2298/TSCI150914208Z . .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1137
T2  - Thermal Science
T1  - Prof. Dr. Simeon Oka 80th Anniversary 56 Years of Scientific Activity 20 Years Acting as the Editor-in-Chief of the Journal Thermal Science
VL  - 20
SP  - SIX
EP  - SXIII
UR  - https://hdl.handle.net/21.15107/rcub_vinar_1137
ER  - 

@article{
author = "Stefanović, Predrag Lj.",
year = "2016",
journal = "Thermal Science",
title = "Prof. Dr. Simeon Oka 80th Anniversary 56 Years of Scientific Activity 20 Years Acting as the Editor-in-Chief of the Journal Thermal Science",
volume = "20",
pages = "SIX-SXIII",
url = "https://hdl.handle.net/21.15107/rcub_vinar_1137"
}

Stefanović, P. Lj.. (2016). Prof. Dr. Simeon Oka 80th Anniversary 56 Years of Scientific Activity 20 Years Acting as the Editor-in-Chief of the Journal Thermal Science. in Thermal Science, 20, SIX-SXIII.
https://hdl.handle.net/21.15107/rcub_vinar_1137

Stefanović PL. Prof. Dr. Simeon Oka 80th Anniversary 56 Years of Scientific Activity 20 Years Acting as the Editor-in-Chief of the Journal Thermal Science. in Thermal Science. 2016;20:SIX-SXIII.
https://hdl.handle.net/21.15107/rcub_vinar_1137 .

Stefanović, Predrag Lj., "Prof. Dr. Simeon Oka 80th Anniversary 56 Years of Scientific Activity 20 Years Acting as the Editor-in-Chief of the Journal Thermal Science" in Thermal Science, 20 (2016):SIX-SXIII,
https://hdl.handle.net/21.15107/rcub_vinar_1137 .

TY  - JOUR
AU  - Đurašević, Mirjana M.
AU  - Kandić, Aleksandar
AU  - Stefanović, Predrag Lj.
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan Ž.
AU  - Milošević, Zoran
AU  - Markovic, T.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5975
AB  - Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and K-40. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines Kolubara and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. (c) 2013 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment
VL  - 87
IS  - SI
SP  - 73
EP  - 76
DO  - 10.1016/j.apradiso.2013.11.096
ER  - 

@article{
author = "Đurašević, Mirjana M. and Kandić, Aleksandar and Stefanović, Predrag Lj. and Vukanac, Ivana and Šešlak, Bojan Ž. and Milošević, Zoran and Markovic, T.",
year = "2014",
abstract = "Coal as fossil fuel mainly contains naturally occurring radionuclides from the uranium and thorium series and K-40. Use of coal, primarily in industry, as a result has dispersion of radioactive material from coal in and through air and water. The aim of this study was to determine the activity concentrations of natural radionuclides in coal samples from open pit mines Kolubara and to evaluate its effect on population health. The results showed that all measured and calculated values were below the limits recommended in international legislation. (c) 2013 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment",
volume = "87",
number = "SI",
pages = "73-76",
doi = "10.1016/j.apradiso.2013.11.096"
}

Đurašević, M. M., Kandić, A., Stefanović, P. Lj., Vukanac, I., Šešlak, B. Ž., Milošević, Z.,& Markovic, T.. (2014). Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment. in Applied Radiation and Isotopes, 87(SI), 73-76.
https://doi.org/10.1016/j.apradiso.2013.11.096

Đurašević MM, Kandić A, Stefanović PL, Vukanac I, Šešlak BŽ, Milošević Z, Markovic T. Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment. in Applied Radiation and Isotopes. 2014;87(SI):73-76.
doi:10.1016/j.apradiso.2013.11.096 .

Đurašević, Mirjana M., Kandić, Aleksandar, Stefanović, Predrag Lj., Vukanac, Ivana, Šešlak, Bojan Ž., Milošević, Zoran, Markovic, T., "Natural radioactivity in lignite samples from open pit mines Kolubara, Serbia - risk assessment" in Applied Radiation and Isotopes, 87, no. SI (2014):73-76,
https://doi.org/10.1016/j.apradiso.2013.11.096 . .

TY  - JOUR
AU  - Spasojević, Vuk D.
AU  - Šerbanović, Slobodan P.
AU  - Stefanović, Predrag Lj.
AU  - Kijevčanin, Mirjana Lj.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5980
AB  - In this work a review of the currently available methods for carbon dioxide removal from flue gasses is given. Some of them are commercially available, while others are still under development. Special attention is given to detailed description of the methods based on hemi sorption by aqueous solutions of alkanolamines, which found wide commercial use in industry. Selection of appropriate absorbent, process equipment, methods, working parameters, combustion processes, etc., are some of the key points that will be reviewed within this work in order to present advantages and limitations of carbon dioxide removal methods. In the experimental section we have provided data on density, viscosity and refractive index of insufficiently investigated carbon dioxide removal agents, such as monoisopropanolamine (MIPA), diisopropanolamine (DIPA), triisopropanolamine (TIPA) and currently widely used dietanolamine (DEA). The data obtained are crucial for the equipment design and process optimization.
T2  - Hemijska industrija
T1  - Review of techological methods and experimental determination of thermodynamic and transport properties of reagents for carbon dioxide removal from flue gases
VL  - 68
IS  - 1
SP  - 123
EP  - 134
DO  - 10.2298/HEMIND130312039S
ER  - 

@article{
author = "Spasojević, Vuk D. and Šerbanović, Slobodan P. and Stefanović, Predrag Lj. and Kijevčanin, Mirjana Lj.",
year = "2014",
abstract = "In this work a review of the currently available methods for carbon dioxide removal from flue gasses is given. Some of them are commercially available, while others are still under development. Special attention is given to detailed description of the methods based on hemi sorption by aqueous solutions of alkanolamines, which found wide commercial use in industry. Selection of appropriate absorbent, process equipment, methods, working parameters, combustion processes, etc., are some of the key points that will be reviewed within this work in order to present advantages and limitations of carbon dioxide removal methods. In the experimental section we have provided data on density, viscosity and refractive index of insufficiently investigated carbon dioxide removal agents, such as monoisopropanolamine (MIPA), diisopropanolamine (DIPA), triisopropanolamine (TIPA) and currently widely used dietanolamine (DEA). The data obtained are crucial for the equipment design and process optimization.",
journal = "Hemijska industrija",
title = "Review of techological methods and experimental determination of thermodynamic and transport properties of reagents for carbon dioxide removal from flue gases",
volume = "68",
number = "1",
pages = "123-134",
doi = "10.2298/HEMIND130312039S"
}

Spasojević, V. D., Šerbanović, S. P., Stefanović, P. Lj.,& Kijevčanin, M. Lj.. (2014). Review of techological methods and experimental determination of thermodynamic and transport properties of reagents for carbon dioxide removal from flue gases. in Hemijska industrija, 68(1), 123-134.
https://doi.org/10.2298/HEMIND130312039S

Spasojević VD, Šerbanović SP, Stefanović PL, Kijevčanin ML. Review of techological methods and experimental determination of thermodynamic and transport properties of reagents for carbon dioxide removal from flue gases. in Hemijska industrija. 2014;68(1):123-134.
doi:10.2298/HEMIND130312039S .

Spasojević, Vuk D., Šerbanović, Slobodan P., Stefanović, Predrag Lj., Kijevčanin, Mirjana Lj., "Review of techological methods and experimental determination of thermodynamic and transport properties of reagents for carbon dioxide removal from flue gases" in Hemijska industrija, 68, no. 1 (2014):123-134,
https://doi.org/10.2298/HEMIND130312039S . .

TY  - JOUR
AU  - Živković, Nikola V.
AU  - Šerbanović, Slobodan P.
AU  - Zivkovic, Emila M.
AU  - Kijevčanin, Mirjana Lj.
AU  - Stefanović, Predrag Lj.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/162
AB  - In order to mitigate climate change, the priority task is to reduce emissions of greenhouse gases, including sulfur oxides, from stationary power plants. The legal framework of the European Union has limited the allowable emissions of gases with harmful effects and fulfillment of this obligation is also ahead of the Republic of Serbia in the following years. In this paper the categorization of wet procedures for sulfur oxides removal is given. Wet procedure with the most widespread industrial application, lime/limestone process, has been described in detail. In addition, the procedures with chemical and physical absorption and solvent thermal regeneration, which recently gained more importance, have been presented. Experimentally determined thermophysical and transport properties of commercially used and alternative solvents, necessary for the equipment design and process optimization, are also given in the paper. The obtained values of densities and viscosities of pure chemicals - solvents, polyethylene glycol 200 (PEG 200), polyethylene glycol 400 (PEG 400), tetraethylene glycol dimethyl ether (TEGDMA), N-methyl-2-pyrolidon (NMP) and dimethylaniline (DMA), measured at the atmospheric pressure, are presented as a function of temperature.
T2  - Hemijska industrija
T1  - Wet flue gas desulphurisation procedures and relevant solvents thermophysical properties determination
VL  - 68
IS  - 4
SP  - 491
EP  - 500
DO  - 10.2298/HEMIND130610074Z
ER  - 

@article{
author = "Živković, Nikola V. and Šerbanović, Slobodan P. and Zivkovic, Emila M. and Kijevčanin, Mirjana Lj. and Stefanović, Predrag Lj.",
year = "2014",
abstract = "In order to mitigate climate change, the priority task is to reduce emissions of greenhouse gases, including sulfur oxides, from stationary power plants. The legal framework of the European Union has limited the allowable emissions of gases with harmful effects and fulfillment of this obligation is also ahead of the Republic of Serbia in the following years. In this paper the categorization of wet procedures for sulfur oxides removal is given. Wet procedure with the most widespread industrial application, lime/limestone process, has been described in detail. In addition, the procedures with chemical and physical absorption and solvent thermal regeneration, which recently gained more importance, have been presented. Experimentally determined thermophysical and transport properties of commercially used and alternative solvents, necessary for the equipment design and process optimization, are also given in the paper. The obtained values of densities and viscosities of pure chemicals - solvents, polyethylene glycol 200 (PEG 200), polyethylene glycol 400 (PEG 400), tetraethylene glycol dimethyl ether (TEGDMA), N-methyl-2-pyrolidon (NMP) and dimethylaniline (DMA), measured at the atmospheric pressure, are presented as a function of temperature.",
journal = "Hemijska industrija",
title = "Wet flue gas desulphurisation procedures and relevant solvents thermophysical properties determination",
volume = "68",
number = "4",
pages = "491-500",
doi = "10.2298/HEMIND130610074Z"
}

Živković, N. V., Šerbanović, S. P., Zivkovic, E. M., Kijevčanin, M. Lj.,& Stefanović, P. Lj.. (2014). Wet flue gas desulphurisation procedures and relevant solvents thermophysical properties determination. in Hemijska industrija, 68(4), 491-500.
https://doi.org/10.2298/HEMIND130610074Z

Živković NV, Šerbanović SP, Zivkovic EM, Kijevčanin ML, Stefanović PL. Wet flue gas desulphurisation procedures and relevant solvents thermophysical properties determination. in Hemijska industrija. 2014;68(4):491-500.
doi:10.2298/HEMIND130610074Z .

Živković, Nikola V., Šerbanović, Slobodan P., Zivkovic, Emila M., Kijevčanin, Mirjana Lj., Stefanović, Predrag Lj., "Wet flue gas desulphurisation procedures and relevant solvents thermophysical properties determination" in Hemijska industrija, 68, no. 4 (2014):491-500,
https://doi.org/10.2298/HEMIND130610074Z . .

TY  - JOUR
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran J.
AU  - Bakić, Vukman
AU  - Turanjanin, Valentina
AU  - Jovanović, Marina P.
AU  - Vučićević, Biljana S.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5636
AB  - As a non-Annex I Party to the United Nations Framework Convention on Climate Change and Kyoto Protocol signatory, the Republic of Serbia has committed to develop GHG (Greenhouse Gases) emission inventory and prepare comprehensive program of mitigation measures at national level. The paper presents results of 2000-2008 GHG emission inventory assembled for PDH (Public District Heating) sub-sector in accordance with revised IPCC (Intergovernmental Panel on Climate Change) Tier 1 methodology. Evaluation of proposed mitigation measures was performed based on 2012 and 2015 GHG emission projections, obtained for basic and four alternative scenarios, all characterized by the same energy demand but with different fuel mix used. The first alternative scenario addresses GHG emissions in case that solid fuel is substituted by natural gas. The second alternative scenario represents a sub-scenario of the first alternative scenario, with additional substitution of liquid fuel with locally available biomass. Third alternative scenario addresses emissions resulting from complete fuel switch from natural gas to liquid fuel oil, while the final alternative scenario considers the case when natural gas is the only energy resource used. GHG emission trends in the period until 2015, examined in case of previously mentioned basic and four alternative scenarios, point out to the positive impact of fuel switch on GHG emission reduction and pathways for future implementation of proposed mitigation measures. Results obtained clearly quantified assumption that fuel substitution by locally available biomass could solve environmental problems, overcome problems associated with high prices of imported fuels, improve energy supply security and increase local employment. (c) 2012 Elsevier Ltd. All rights reserved.
T2  - Energy
T1  - GHG (Greenhouse Gases) emission inventory and mitigation measures for public district heating plants in the Republic of Serbia
VL  - 57
SP  - 788
EP  - 795
DO  - 10.1016/j.energy.2012.09.063
ER  - 

@article{
author = "Cvetinović, Dejan and Stefanović, Predrag Lj. and Marković, Zoran J. and Bakić, Vukman and Turanjanin, Valentina and Jovanović, Marina P. and Vučićević, Biljana S.",
year = "2013",
abstract = "As a non-Annex I Party to the United Nations Framework Convention on Climate Change and Kyoto Protocol signatory, the Republic of Serbia has committed to develop GHG (Greenhouse Gases) emission inventory and prepare comprehensive program of mitigation measures at national level. The paper presents results of 2000-2008 GHG emission inventory assembled for PDH (Public District Heating) sub-sector in accordance with revised IPCC (Intergovernmental Panel on Climate Change) Tier 1 methodology. Evaluation of proposed mitigation measures was performed based on 2012 and 2015 GHG emission projections, obtained for basic and four alternative scenarios, all characterized by the same energy demand but with different fuel mix used. The first alternative scenario addresses GHG emissions in case that solid fuel is substituted by natural gas. The second alternative scenario represents a sub-scenario of the first alternative scenario, with additional substitution of liquid fuel with locally available biomass. Third alternative scenario addresses emissions resulting from complete fuel switch from natural gas to liquid fuel oil, while the final alternative scenario considers the case when natural gas is the only energy resource used. GHG emission trends in the period until 2015, examined in case of previously mentioned basic and four alternative scenarios, point out to the positive impact of fuel switch on GHG emission reduction and pathways for future implementation of proposed mitigation measures. Results obtained clearly quantified assumption that fuel substitution by locally available biomass could solve environmental problems, overcome problems associated with high prices of imported fuels, improve energy supply security and increase local employment. (c) 2012 Elsevier Ltd. All rights reserved.",
journal = "Energy",
title = "GHG (Greenhouse Gases) emission inventory and mitigation measures for public district heating plants in the Republic of Serbia",
volume = "57",
pages = "788-795",
doi = "10.1016/j.energy.2012.09.063"
}

Cvetinović, D., Stefanović, P. Lj., Marković, Z. J., Bakić, V., Turanjanin, V., Jovanović, M. P.,& Vučićević, B. S.. (2013). GHG (Greenhouse Gases) emission inventory and mitigation measures for public district heating plants in the Republic of Serbia. in Energy, 57, 788-795.
https://doi.org/10.1016/j.energy.2012.09.063

Cvetinović D, Stefanović PL, Marković ZJ, Bakić V, Turanjanin V, Jovanović MP, Vučićević BS. GHG (Greenhouse Gases) emission inventory and mitigation measures for public district heating plants in the Republic of Serbia. in Energy. 2013;57:788-795.
doi:10.1016/j.energy.2012.09.063 .

Cvetinović, Dejan, Stefanović, Predrag Lj., Marković, Zoran J., Bakić, Vukman, Turanjanin, Valentina, Jovanović, Marina P., Vučićević, Biljana S., "GHG (Greenhouse Gases) emission inventory and mitigation measures for public district heating plants in the Republic of Serbia" in Energy, 57 (2013):788-795,
https://doi.org/10.1016/j.energy.2012.09.063 . .

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Rasuo, Basko
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Swiatkowski, Bartosz
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5311
AB  - Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O-2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions
VL  - 58
IS  - 1-2
SP  - 654
EP  - 662
DO  - 10.1016/j.ijheatmasstransfer.2012.11.070
ER  - 

@article{
author = "Jovanović, Rastko D. and Rasuo, Basko and Stefanović, Predrag Lj. and Cvetinović, Dejan and Swiatkowski, Bartosz",
year = "2013",
abstract = "Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O-2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions",
volume = "58",
number = "1-2",
pages = "654-662",
doi = "10.1016/j.ijheatmasstransfer.2012.11.070"
}

Jovanović, R. D., Rasuo, B., Stefanović, P. Lj., Cvetinović, D.,& Swiatkowski, B.. (2013). Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer, 58(1-2), 654-662.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070

Jovanović RD, Rasuo B, Stefanović PL, Cvetinović D, Swiatkowski B. Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer. 2013;58(1-2):654-662.
doi:10.1016/j.ijheatmasstransfer.2012.11.070 .

Jovanović, Rastko D., Rasuo, Basko, Stefanović, Predrag Lj., Cvetinović, Dejan, Swiatkowski, Bartosz, "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions" in International Journal of Heat and Mass Transfer, 58, no. 1-2 (2013):654-662,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070 . .

TY  - JOUR
AU  - Stakic, Milan
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Škobalj, Predrag D.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5368
AB  - The paper addresses results for the case of convective drying of particulate solids in a packed and in a fluid bed, analyzing agreement between the numerical results and the results of corresponding experimental investigation, as well as the differences between packed and fluid bed operation. In the fluid bed simulation model of unsteady simultaneous one-dimensional heat and mass transfer between solids, gas phase and bubble phase during drying process, based on two-phase bubbling model, it is assumed that the gas-solid interface is at thermodynamic equilibrium. The basic idea is to calculate heat and mass transfer between gas and particles (i.e., the drying process) in suspension phase as for a packed bed of particles, where the drying rate (evaporated moisture flux) of the specific product is calculated by applying the concept of a drying coefficient. Mixing of the particles (i.e., the impact onto the heat and mass transfer coefficients) in the case of fluid bed is taken into account by means of the diffusion term in the differential equations, using an effective particle diffusion coefficient. Model validation was done on the basis of the experimental data obtained with narrow fraction of poppy seeds characterized by mean equivalent particle diameter (d(s.d) = 0.75 mm), re-wetted with required (calculated) amount of water up to the initial moisture content (X-0 = 0.54) for all experiments. Comparison of the drying kinetics, both experimental and numerical, has shown that higher gas (drying agent) temperatures, as well as velocities (flow-rates), induce faster drying. This effect is more pronounced for deeper beds, because of the larger amount of wet material to be dried using the same drying agent capacity. Bed temperature differences along the bed height are significant inside the packed bed, while in the fluid bed, for the same drying conditions, are almost negligible due to mixing of particles. Residence time is shorter in the case of a fluid bed drying compared to a packed bed drying. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Convective drying of particulate solids - Packed vs. fluid bed operation
VL  - 59
SP  - 66
EP  - 74
DO  - 10.1016/j.ijheatmasstransfer.2012.11.078
ER  - 

@article{
author = "Stakic, Milan and Stefanović, Predrag Lj. and Cvetinović, Dejan and Škobalj, Predrag D.",
year = "2013",
abstract = "The paper addresses results for the case of convective drying of particulate solids in a packed and in a fluid bed, analyzing agreement between the numerical results and the results of corresponding experimental investigation, as well as the differences between packed and fluid bed operation. In the fluid bed simulation model of unsteady simultaneous one-dimensional heat and mass transfer between solids, gas phase and bubble phase during drying process, based on two-phase bubbling model, it is assumed that the gas-solid interface is at thermodynamic equilibrium. The basic idea is to calculate heat and mass transfer between gas and particles (i.e., the drying process) in suspension phase as for a packed bed of particles, where the drying rate (evaporated moisture flux) of the specific product is calculated by applying the concept of a drying coefficient. Mixing of the particles (i.e., the impact onto the heat and mass transfer coefficients) in the case of fluid bed is taken into account by means of the diffusion term in the differential equations, using an effective particle diffusion coefficient. Model validation was done on the basis of the experimental data obtained with narrow fraction of poppy seeds characterized by mean equivalent particle diameter (d(s.d) = 0.75 mm), re-wetted with required (calculated) amount of water up to the initial moisture content (X-0 = 0.54) for all experiments. Comparison of the drying kinetics, both experimental and numerical, has shown that higher gas (drying agent) temperatures, as well as velocities (flow-rates), induce faster drying. This effect is more pronounced for deeper beds, because of the larger amount of wet material to be dried using the same drying agent capacity. Bed temperature differences along the bed height are significant inside the packed bed, while in the fluid bed, for the same drying conditions, are almost negligible due to mixing of particles. Residence time is shorter in the case of a fluid bed drying compared to a packed bed drying. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Convective drying of particulate solids - Packed vs. fluid bed operation",
volume = "59",
pages = "66-74",
doi = "10.1016/j.ijheatmasstransfer.2012.11.078"
}

Stakic, M., Stefanović, P. Lj., Cvetinović, D.,& Škobalj, P. D.. (2013). Convective drying of particulate solids - Packed vs. fluid bed operation. in International Journal of Heat and Mass Transfer, 59, 66-74.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.078

Stakic M, Stefanović PL, Cvetinović D, Škobalj PD. Convective drying of particulate solids - Packed vs. fluid bed operation. in International Journal of Heat and Mass Transfer. 2013;59:66-74.
doi:10.1016/j.ijheatmasstransfer.2012.11.078 .

Stakic, Milan, Stefanović, Predrag Lj., Cvetinović, Dejan, Škobalj, Predrag D., "Convective drying of particulate solids - Packed vs. fluid bed operation" in International Journal of Heat and Mass Transfer, 59 (2013):66-74,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.078 . .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran J.
AU  - Bakić, Vukman
AU  - Cvetinović, Dejan
AU  - Spasojević, Vuk D.
AU  - Živković, Nikola V.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5062
AB  - The revised Intergovernmental Panel on Climate Change guidelines for national greenhouse gas inventories recommends that more comprehensive and thus more reliable characteristics of the local fossil fuels should be used for the national greenhouse gas inventory calculations. This paper deal with the carbon emission characteristics of low-calorific lignite recovered from the Kolubara open-pit mine. The samples of coal were carefully selected in order to cover the net calorific value, ash and water content of the broad spectrum of the quality of the raw lignite supplied to the Serbian thermal power plants. Correlation analysis of the laboratory analysis data gave a linear dependency of the net calorific value on the combustible content in the coal samples. Also, linear correlation between the carbon content and the net calorific value was found. The regression analysis of experimentally determined coal characteristics implies that the carbon emission factor is dependent on the net calorific value. For the subset of raw lignite samples with the net calorific value Q(d)(r) = 6-10 MJ/kg, that is most representative for current and near future use for power generation in Serbian thermal power plants, the linear dependency CEFr (tC/TJ) = 34.407 - 0.5891.Q(d)(r) MJ/kg was proposed. Regarding the net calorific ranges of samples examined, the raw Kolubara lignite carbon emission factor is considerably higher than those recommended by Intergovernmental Panel on Climate Change Tier 1 method of 27.6 tC/TJ.
T2  - Thermal Science
T1  - Evaluation of Kolubara Lignite Carbon Emission Characteristics
VL  - 16
IS  - 3
SP  - 805
EP  - 816
DO  - 10.2298/TSCI120215130S
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Marković, Zoran J. and Bakić, Vukman and Cvetinović, Dejan and Spasojević, Vuk D. and Živković, Nikola V.",
year = "2012",
abstract = "The revised Intergovernmental Panel on Climate Change guidelines for national greenhouse gas inventories recommends that more comprehensive and thus more reliable characteristics of the local fossil fuels should be used for the national greenhouse gas inventory calculations. This paper deal with the carbon emission characteristics of low-calorific lignite recovered from the Kolubara open-pit mine. The samples of coal were carefully selected in order to cover the net calorific value, ash and water content of the broad spectrum of the quality of the raw lignite supplied to the Serbian thermal power plants. Correlation analysis of the laboratory analysis data gave a linear dependency of the net calorific value on the combustible content in the coal samples. Also, linear correlation between the carbon content and the net calorific value was found. The regression analysis of experimentally determined coal characteristics implies that the carbon emission factor is dependent on the net calorific value. For the subset of raw lignite samples with the net calorific value Q(d)(r) = 6-10 MJ/kg, that is most representative for current and near future use for power generation in Serbian thermal power plants, the linear dependency CEFr (tC/TJ) = 34.407 - 0.5891.Q(d)(r) MJ/kg was proposed. Regarding the net calorific ranges of samples examined, the raw Kolubara lignite carbon emission factor is considerably higher than those recommended by Intergovernmental Panel on Climate Change Tier 1 method of 27.6 tC/TJ.",
journal = "Thermal Science",
title = "Evaluation of Kolubara Lignite Carbon Emission Characteristics",
volume = "16",
number = "3",
pages = "805-816",
doi = "10.2298/TSCI120215130S"
}

Stefanović, P. Lj., Marković, Z. J., Bakić, V., Cvetinović, D., Spasojević, V. D.,& Živković, N. V.. (2012). Evaluation of Kolubara Lignite Carbon Emission Characteristics. in Thermal Science, 16(3), 805-816.
https://doi.org/10.2298/TSCI120215130S

Stefanović PL, Marković ZJ, Bakić V, Cvetinović D, Spasojević VD, Živković NV. Evaluation of Kolubara Lignite Carbon Emission Characteristics. in Thermal Science. 2012;16(3):805-816.
doi:10.2298/TSCI120215130S .

Stefanović, Predrag Lj., Marković, Zoran J., Bakić, Vukman, Cvetinović, Dejan, Spasojević, Vuk D., Živković, Nikola V., "Evaluation of Kolubara Lignite Carbon Emission Characteristics" in Thermal Science, 16, no. 3 (2012):805-816,
https://doi.org/10.2298/TSCI120215130S . .

TY  - CONF
AU  - Đurašević, Mirjana
AU  - Kandić, Aleksandar
AU  - Stefanović, Predrag
AU  - Vukanac, Ivana
AU  - Šešlak, Bojan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12824
AB  - Coal as the most widely used fossil fuel contains traces of naturally occurring radioactivity from uranium and thorium series and 40K. The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) estimated that average concentrations in coal worldwide are 50 Bq/kg for 40K and 20 Bq/kg for both 238U and 232Th (range 5 Bq/kg – 300 Bq/kg). [1] Activity concentrations of naturally occurring radionuclide 40K, 238U and 232Th for tree groups of samples of coal and mineral matter mixed with coal (I (2008 year – 30 samples), II (2009 year – 26 samples) and III (2010 year – 26 samples)) are presented in this paper. Representative samples of different coal quality were especially collected at different locations at open pit mines in RB “Kolubara” which has annual production of 29 millions tones of lignite for the power generation at TPP “Nicola Tesla”, Obrenovac. The samples were pulverized, dried and sealed in Marinelli plastic boxes 0.5 l, and stored for forty days until radioactive equilibrium between 226Ra and its decay products were achieved. All samples were measured by means of coaxial germanium HPGe detector (ORTEC GEM-30, 30 % relative efficiency and 1.8 keV resolution for 60Co at 1332 keV line). The detector was calibrated using standard solutions with radionuclide activities certified by CMI [2]. The experimentally obtained spectra were processed using Canberra’s Genie2000 software. The activity concentrations of 238U and 232Th were determined indirectly from the gamma-rays emitted by their progenies while 40K was determined directly by its gamma-line of 1460.8 keV. It can be seen from this table that the measured coal samples have low activity concentrations and the artificial radionuclides were not detected. The obtained activity concentrations of naturally occurring radionuclides in analyzed coal samples are comparable with those in coals from other countries [3, 4]
PB  - University of Niš : Faculty of Electronic Engineering
C3  - RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts
T1  - The content of natural radionuclides in lignite samples from open pit mines “Kolubara”, Serbia
SP  - 135
EP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12824
ER  - 

@conference{
author = "Đurašević, Mirjana and Kandić, Aleksandar and Stefanović, Predrag and Vukanac, Ivana and Šešlak, Bojan",
year = "2012",
abstract = "Coal as the most widely used fossil fuel contains traces of naturally occurring radioactivity from uranium and thorium series and 40K. The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) estimated that average concentrations in coal worldwide are 50 Bq/kg for 40K and 20 Bq/kg for both 238U and 232Th (range 5 Bq/kg – 300 Bq/kg). [1] Activity concentrations of naturally occurring radionuclide 40K, 238U and 232Th for tree groups of samples of coal and mineral matter mixed with coal (I (2008 year – 30 samples), II (2009 year – 26 samples) and III (2010 year – 26 samples)) are presented in this paper. Representative samples of different coal quality were especially collected at different locations at open pit mines in RB “Kolubara” which has annual production of 29 millions tones of lignite for the power generation at TPP “Nicola Tesla”, Obrenovac. The samples were pulverized, dried and sealed in Marinelli plastic boxes 0.5 l, and stored for forty days until radioactive equilibrium between 226Ra and its decay products were achieved. All samples were measured by means of coaxial germanium HPGe detector (ORTEC GEM-30, 30 % relative efficiency and 1.8 keV resolution for 60Co at 1332 keV line). The detector was calibrated using standard solutions with radionuclide activities certified by CMI [2]. The experimentally obtained spectra were processed using Canberra’s Genie2000 software. The activity concentrations of 238U and 232Th were determined indirectly from the gamma-rays emitted by their progenies while 40K was determined directly by its gamma-line of 1460.8 keV. It can be seen from this table that the measured coal samples have low activity concentrations and the artificial radionuclides were not detected. The obtained activity concentrations of naturally occurring radionuclides in analyzed coal samples are comparable with those in coals from other countries [3, 4]",
publisher = "University of Niš : Faculty of Electronic Engineering",
journal = "RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts",
title = "The content of natural radionuclides in lignite samples from open pit mines “Kolubara”, Serbia",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12824"
}

Đurašević, M., Kandić, A., Stefanović, P., Vukanac, I.,& Šešlak, B.. (2012). The content of natural radionuclides in lignite samples from open pit mines “Kolubara”, Serbia. in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts
University of Niš : Faculty of Electronic Engineering., 135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12824

Đurašević M, Kandić A, Stefanović P, Vukanac I, Šešlak B. The content of natural radionuclides in lignite samples from open pit mines “Kolubara”, Serbia. in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts. 2012;:135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12824 .

Đurašević, Mirjana, Kandić, Aleksandar, Stefanović, Predrag, Vukanac, Ivana, Šešlak, Bojan, "The content of natural radionuclides in lignite samples from open pit mines “Kolubara”, Serbia" in RAD 2012 : 1st International Conference on Radiation in Various Fields of Research : Book of abstracts (2012):135-135,
https://hdl.handle.net/21.15107/rcub_vinar_12824 .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran
AU  - Bakić, Vukman
AU  - Cvetinović, Dejan
AU  - Živković, Nikola V.
AU  - Spasojević, Vuk D.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12117
AB  - Prema međunarodno priznatoj metodologiji za procenu emisije gasova staklene bašte (The Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories - GHG), preporučeno je da se u izradi inventara GHG koriste preciznije vrednosti o karakteristikama korišćenog fosilnog goriva. U ovom radu je prikazana analiza emisionih karakteristika domaćih niskokaloričnih lignita iz površinskih kopova kolubarskog basena. Izbor analiziranih uzoraka uglja izvršen je tako da se pokrije širok opseg sadržaja pepela i vlage, donjeg toplotnog efekta i drugih karakteristika sirovog uglja, sa ciljem da reprezentuju najširi spektar očekivanih kvaliteta ugljeva koji se dopremaju u termoelektrane. Dobijeni rezultati ukazuju da postoji jasno izražena linearna zavisnost donjeg toplotnog efekta od sadržaja pepela i sadržaja vlage, odnosno od sadržaja sagorljivih materija u reprezentativnim uzorcima uglja. U radu je prikazana eksperimentalno određena zavisnost sadržaja ugljenika i emisionog faktora od donjeg toplotnog efekta. U opsegu kvaliteta rovnog lignita, emisioni faktor ima znatno veću vrednost u odnosu na standardnu međunarodno preporučenu (IPCC) fiksnu vrednost za lignit.
AB  - In accordance with the Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, it is recommended that more precise and reliable data characteristics of the locally used fossil fuel should be introduced in GHG inventory preparation. This paper presents the evaluation of emission characteristics of low calorific Kolubara open pit mined lignite. The samples of coal were carefully selected to cover a wide range of net calorific value, ash, and moisture content, in order to ensure the coverage of wide spectra of the expected lignite qualities that are usually supplied to Serbian thermal power plants. Performed correlation analysis indicated that linear correlation between the net calorific value and the ash, moisture, and the content of combustible matter in the coal samples exists. From obtained set of results it was possible to determine the dependence between the carbon content as well as the emission factor and the net calorific value of the coal. For the range of coal with net calorific values taken in the consideration, derived correlation gives considerably higher values for the emission factor, compared to the standard IPCC recommended value for lignite.
T2  - Termotehnika
T1  - Emisioni faktor lignita kolubarskog basena
T1  - Kolubara mine lignite emission factor evaluation
VL  - 37
IS  - 2
SP  - 241
EP  - 251
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12117
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Marković, Zoran and Bakić, Vukman and Cvetinović, Dejan and Živković, Nikola V. and Spasojević, Vuk D.",
year = "2011",
abstract = "Prema međunarodno priznatoj metodologiji za procenu emisije gasova staklene bašte (The Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories - GHG), preporučeno je da se u izradi inventara GHG koriste preciznije vrednosti o karakteristikama korišćenog fosilnog goriva. U ovom radu je prikazana analiza emisionih karakteristika domaćih niskokaloričnih lignita iz površinskih kopova kolubarskog basena. Izbor analiziranih uzoraka uglja izvršen je tako da se pokrije širok opseg sadržaja pepela i vlage, donjeg toplotnog efekta i drugih karakteristika sirovog uglja, sa ciljem da reprezentuju najširi spektar očekivanih kvaliteta ugljeva koji se dopremaju u termoelektrane. Dobijeni rezultati ukazuju da postoji jasno izražena linearna zavisnost donjeg toplotnog efekta od sadržaja pepela i sadržaja vlage, odnosno od sadržaja sagorljivih materija u reprezentativnim uzorcima uglja. U radu je prikazana eksperimentalno određena zavisnost sadržaja ugljenika i emisionog faktora od donjeg toplotnog efekta. U opsegu kvaliteta rovnog lignita, emisioni faktor ima znatno veću vrednost u odnosu na standardnu međunarodno preporučenu (IPCC) fiksnu vrednost za lignit., In accordance with the Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, it is recommended that more precise and reliable data characteristics of the locally used fossil fuel should be introduced in GHG inventory preparation. This paper presents the evaluation of emission characteristics of low calorific Kolubara open pit mined lignite. The samples of coal were carefully selected to cover a wide range of net calorific value, ash, and moisture content, in order to ensure the coverage of wide spectra of the expected lignite qualities that are usually supplied to Serbian thermal power plants. Performed correlation analysis indicated that linear correlation between the net calorific value and the ash, moisture, and the content of combustible matter in the coal samples exists. From obtained set of results it was possible to determine the dependence between the carbon content as well as the emission factor and the net calorific value of the coal. For the range of coal with net calorific values taken in the consideration, derived correlation gives considerably higher values for the emission factor, compared to the standard IPCC recommended value for lignite.",
journal = "Termotehnika",
title = "Emisioni faktor lignita kolubarskog basena, Kolubara mine lignite emission factor evaluation",
volume = "37",
number = "2",
pages = "241-251",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12117"
}

Stefanović, P. Lj., Marković, Z., Bakić, V., Cvetinović, D., Živković, N. V.,& Spasojević, V. D.. (2011). Emisioni faktor lignita kolubarskog basena. in Termotehnika, 37(2), 241-251.
https://hdl.handle.net/21.15107/rcub_vinar_12117

Stefanović PL, Marković Z, Bakić V, Cvetinović D, Živković NV, Spasojević VD. Emisioni faktor lignita kolubarskog basena. in Termotehnika. 2011;37(2):241-251.
https://hdl.handle.net/21.15107/rcub_vinar_12117 .

Stefanović, Predrag Lj., Marković, Zoran, Bakić, Vukman, Cvetinović, Dejan, Živković, Nikola V., Spasojević, Vuk D., "Emisioni faktor lignita kolubarskog basena" in Termotehnika, 37, no. 2 (2011):241-251,
https://hdl.handle.net/21.15107/rcub_vinar_12117 .

TY  - JOUR
AU  - Erić, Milić D.
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Radovanovic, Predrag M.
AU  - Živković, Nikola V.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3987
AB  - The paper presents new experimental method developed and new measuring system developed and installed into flame-gas tract of utility boiler. Investigations have been performed at the steam boiler of unit 2 at TPP Ptolemais. Ptolemais, Greece. which suffered from very unstable combustion and great pressure oscillations Experimental method. based on high-speed acquisition system. was developed and used for detection of pressure oscillations and determination of the origin of boiler unstable operation. Signals were obtained from piezoelectric pressure sensors located along the flame-gas tract of the steam boiler and time and frequency domain analysis were used for post processing of collected data. Investigations of the pressure oscillations in boiler gas tract have contributed to reveal origin of the boiler unstable operation. and have been of the great help in establishing proper boiler operation
T2  - Thermal Science
T1  - Investigation of Pressure Pulsations in the Furnace and Flue Gas Tract of the Pulverized Coal Combustion Utility Boiler
VL  - 14
IS  - 1
SP  - 261
EP  - 270
DO  - 10.2298/TSCI1001261E
ER  - 

@article{
author = "Erić, Milić D. and Cvetinović, Dejan and Stefanović, Predrag Lj. and Radovanovic, Predrag M. and Živković, Nikola V.",
year = "2010",
abstract = "The paper presents new experimental method developed and new measuring system developed and installed into flame-gas tract of utility boiler. Investigations have been performed at the steam boiler of unit 2 at TPP Ptolemais. Ptolemais, Greece. which suffered from very unstable combustion and great pressure oscillations Experimental method. based on high-speed acquisition system. was developed and used for detection of pressure oscillations and determination of the origin of boiler unstable operation. Signals were obtained from piezoelectric pressure sensors located along the flame-gas tract of the steam boiler and time and frequency domain analysis were used for post processing of collected data. Investigations of the pressure oscillations in boiler gas tract have contributed to reveal origin of the boiler unstable operation. and have been of the great help in establishing proper boiler operation",
journal = "Thermal Science",
title = "Investigation of Pressure Pulsations in the Furnace and Flue Gas Tract of the Pulverized Coal Combustion Utility Boiler",
volume = "14",
number = "1",
pages = "261-270",
doi = "10.2298/TSCI1001261E"
}

Erić, M. D., Cvetinović, D., Stefanović, P. Lj., Radovanovic, P. M.,& Živković, N. V.. (2010). Investigation of Pressure Pulsations in the Furnace and Flue Gas Tract of the Pulverized Coal Combustion Utility Boiler. in Thermal Science, 14(1), 261-270.
https://doi.org/10.2298/TSCI1001261E

Erić MD, Cvetinović D, Stefanović PL, Radovanovic PM, Živković NV. Investigation of Pressure Pulsations in the Furnace and Flue Gas Tract of the Pulverized Coal Combustion Utility Boiler. in Thermal Science. 2010;14(1):261-270.
doi:10.2298/TSCI1001261E .

Erić, Milić D., Cvetinović, Dejan, Stefanović, Predrag Lj., Radovanovic, Predrag M., Živković, Nikola V., "Investigation of Pressure Pulsations in the Furnace and Flue Gas Tract of the Pulverized Coal Combustion Utility Boiler" in Thermal Science, 14, no. 1 (2010):261-270,
https://doi.org/10.2298/TSCI1001261E . .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Pavlović, Pavle B.
AU  - Kostić, Života
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2561
AB  - For thermal plasma processing of solid particles (including processes like plasma spraying, spheroidizing, decomposition, melting or fuming of fine particles, synthesis of ultrafine particles, etc.) injection and mixing, i.e. momentum, heat and mass transfer between solid particles and plasma flow is of great importance for the quality of the product. There are numerous effects involved in plasma-particle interactions. Effects have different ranges of influence in particular plasma process or reactor. This paper present the results of a numerical analysis of the evaporation and decomposition of B2O3 powder (with particle diameter less than 100 mu m) injected in a nitrogen plasma axisymmetric, shielded reactor. This analysis serves as a basis for the optimization of the plasma reactor parameters, used for the plasma synthesis of BN ultrafine powder or boron powder production when B2O3 powder is used as a precursor. The computed fields of stream function and plasma temperature, particle trajectories and some parameters (plasma and particle temperature, particle Re, Nu and Kn* numbers, influence of evaporation and noncontinuum effects on momentum heat and mass transfer and instantaneous particle diameter) along particle trajectories are presented and discussed.
T2  - High Temperature Material Processes
T1  - Numerical Analysis of Momentum, Heat and Mass Transfer Between a Nitrogen Plasma Jet and B2o3 Particles Injected in An Axisymmetric Reactor
VL  - 14
IS  - 4
SP  - 353
EP  - 365
DO  - 10.1615/HighTempMatProc.v14.i4.50
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Cvetinović, Dejan and Pavlović, Pavle B. and Kostić, Života",
year = "2010",
abstract = "For thermal plasma processing of solid particles (including processes like plasma spraying, spheroidizing, decomposition, melting or fuming of fine particles, synthesis of ultrafine particles, etc.) injection and mixing, i.e. momentum, heat and mass transfer between solid particles and plasma flow is of great importance for the quality of the product. There are numerous effects involved in plasma-particle interactions. Effects have different ranges of influence in particular plasma process or reactor. This paper present the results of a numerical analysis of the evaporation and decomposition of B2O3 powder (with particle diameter less than 100 mu m) injected in a nitrogen plasma axisymmetric, shielded reactor. This analysis serves as a basis for the optimization of the plasma reactor parameters, used for the plasma synthesis of BN ultrafine powder or boron powder production when B2O3 powder is used as a precursor. The computed fields of stream function and plasma temperature, particle trajectories and some parameters (plasma and particle temperature, particle Re, Nu and Kn* numbers, influence of evaporation and noncontinuum effects on momentum heat and mass transfer and instantaneous particle diameter) along particle trajectories are presented and discussed.",
journal = "High Temperature Material Processes",
title = "Numerical Analysis of Momentum, Heat and Mass Transfer Between a Nitrogen Plasma Jet and B2o3 Particles Injected in An Axisymmetric Reactor",
volume = "14",
number = "4",
pages = "353-365",
doi = "10.1615/HighTempMatProc.v14.i4.50"
}

Stefanović, P. Lj., Cvetinović, D., Pavlović, P. B.,& Kostić, Ž.. (2010). Numerical Analysis of Momentum, Heat and Mass Transfer Between a Nitrogen Plasma Jet and B2o3 Particles Injected in An Axisymmetric Reactor. in High Temperature Material Processes, 14(4), 353-365.
https://doi.org/10.1615/HighTempMatProc.v14.i4.50

Stefanović PL, Cvetinović D, Pavlović PB, Kostić Ž. Numerical Analysis of Momentum, Heat and Mass Transfer Between a Nitrogen Plasma Jet and B2o3 Particles Injected in An Axisymmetric Reactor. in High Temperature Material Processes. 2010;14(4):353-365.
doi:10.1615/HighTempMatProc.v14.i4.50 .

Stefanović, Predrag Lj., Cvetinović, Dejan, Pavlović, Pavle B., Kostić, Života, "Numerical Analysis of Momentum, Heat and Mass Transfer Between a Nitrogen Plasma Jet and B2o3 Particles Injected in An Axisymmetric Reactor" in High Temperature Material Processes, 14, no. 4 (2010):353-365,
https://doi.org/10.1615/HighTempMatProc.v14.i4.50 . .

TY  - JOUR
AU  - Marković, Zoran
AU  - Krivošić, Ilija M.
AU  - Stefanović, Predrag
AU  - Cvetinović, Dejan
AU  - Živković, Nikola V.
AU  - Jovanović, Rastko
AU  - Pavlović, Zoran
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12118
AB  - Cilindrične tankozidne ljuske se često koriste kao strukturalni elementi u inženjerskim konstrukcijama. Aksijalno pritisnute cilindrične strukture su sklone pojavi gubitka stabilnosti, pri čemu im značajno opada nosivost i naglo menja geometrija strukture. Stoga je veoma bitno odrediti vrednosti spoljašnjeg opterećenja pri kojem dolazi do pojave gubitka stabilnosti. U opštem slučaju, analiza gubitka stabilnosti se može podeliti na bifurkacionu i nelinearnu analizu. Bifurkaciona analiza se koristi za razmatranje geometrijski idealnih, a nelinearna za analizu realnih struktura. Cilj ovog rada je da se odrede najniže vrednosti spoljašnjeg opterećenja pri kojem će doći do gubitka stabilnosti geometrijski idealnih, aksijalno pritisnutih, slobodno oslonjenih cilindara različitih geometrijskih karakteristika. U tu svrhu je korišćena numerička analiza zasnovana na metodi konačnih elemenata. Na osnovu rezultata parametarske numeričke analize, možemo zaključiti da nosivost aksijalno pritisnutog, geometrijski idealnog cilindra značajno opada sa porastom faktora debljine cilindra R/t. Takođe, rezultati pokazuju da dolazi i do pada krutosti sa porastom faktora vitkosti L/R, ali da uticaj faktora vitkosti na vrednost opterećenja pri pojavi izvijanja nije tako intenzivan.
AB  - Cylindrical shells with thin walls are widely used structural elements in engineering constructions. Axially compressed shells are susceptible to buckling, which significantly reduce their load carrying capabilities. In the same time, buckling induces sudden and remarkable changes of shell geometry, so reliable determination of shell buckling load becomes a very important task for the structural engineers. Generally, buckling analysis may be divided into bifurcation and load-deflection analysis. Bifurcation analysis is used for geometrically perfect, while load-deflection analysis is used for imperfect systems. The aim of this paper is to investigate the buckling strength of the geometrically perfect, axially compressed, simply supported cylindrical shell with a wide range of height-to-diameter and diameter-to-thickness ratios. Numerical analysis based on finite elements method is used to evaluate buckling strength. According to the results of the parametric study, the buckling strength of the axially compressed perfect shell decreases significantly as the diameter to-thickness ratio increases, while it decreases slightly as the height-to-diameter ratio increases.
T2  - Termotehnika
T1  - Parametarska bifurkaciona analiza slobodno oslonjenih cilindričnih ljuski
T1  - Parametric buckling analysis of simply supported cylindrical shell
VL  - 37
IS  - 2
SP  - 241
EP  - 251
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12118
ER  - 

@article{
author = "Marković, Zoran and Krivošić, Ilija M. and Stefanović, Predrag and Cvetinović, Dejan and Živković, Nikola V. and Jovanović, Rastko and Pavlović, Zoran",
year = "2010",
abstract = "Cilindrične tankozidne ljuske se često koriste kao strukturalni elementi u inženjerskim konstrukcijama. Aksijalno pritisnute cilindrične strukture su sklone pojavi gubitka stabilnosti, pri čemu im značajno opada nosivost i naglo menja geometrija strukture. Stoga je veoma bitno odrediti vrednosti spoljašnjeg opterećenja pri kojem dolazi do pojave gubitka stabilnosti. U opštem slučaju, analiza gubitka stabilnosti se može podeliti na bifurkacionu i nelinearnu analizu. Bifurkaciona analiza se koristi za razmatranje geometrijski idealnih, a nelinearna za analizu realnih struktura. Cilj ovog rada je da se odrede najniže vrednosti spoljašnjeg opterećenja pri kojem će doći do gubitka stabilnosti geometrijski idealnih, aksijalno pritisnutih, slobodno oslonjenih cilindara različitih geometrijskih karakteristika. U tu svrhu je korišćena numerička analiza zasnovana na metodi konačnih elemenata. Na osnovu rezultata parametarske numeričke analize, možemo zaključiti da nosivost aksijalno pritisnutog, geometrijski idealnog cilindra značajno opada sa porastom faktora debljine cilindra R/t. Takođe, rezultati pokazuju da dolazi i do pada krutosti sa porastom faktora vitkosti L/R, ali da uticaj faktora vitkosti na vrednost opterećenja pri pojavi izvijanja nije tako intenzivan., Cylindrical shells with thin walls are widely used structural elements in engineering constructions. Axially compressed shells are susceptible to buckling, which significantly reduce their load carrying capabilities. In the same time, buckling induces sudden and remarkable changes of shell geometry, so reliable determination of shell buckling load becomes a very important task for the structural engineers. Generally, buckling analysis may be divided into bifurcation and load-deflection analysis. Bifurcation analysis is used for geometrically perfect, while load-deflection analysis is used for imperfect systems. The aim of this paper is to investigate the buckling strength of the geometrically perfect, axially compressed, simply supported cylindrical shell with a wide range of height-to-diameter and diameter-to-thickness ratios. Numerical analysis based on finite elements method is used to evaluate buckling strength. According to the results of the parametric study, the buckling strength of the axially compressed perfect shell decreases significantly as the diameter to-thickness ratio increases, while it decreases slightly as the height-to-diameter ratio increases.",
journal = "Termotehnika",
title = "Parametarska bifurkaciona analiza slobodno oslonjenih cilindričnih ljuski, Parametric buckling analysis of simply supported cylindrical shell",
volume = "37",
number = "2",
pages = "241-251",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12118"
}

Marković, Z., Krivošić, I. M., Stefanović, P., Cvetinović, D., Živković, N. V., Jovanović, R.,& Pavlović, Z.. (2010). Parametarska bifurkaciona analiza slobodno oslonjenih cilindričnih ljuski. in Termotehnika, 37(2), 241-251.
https://hdl.handle.net/21.15107/rcub_vinar_12118

Marković Z, Krivošić IM, Stefanović P, Cvetinović D, Živković NV, Jovanović R, Pavlović Z. Parametarska bifurkaciona analiza slobodno oslonjenih cilindričnih ljuski. in Termotehnika. 2010;37(2):241-251.
https://hdl.handle.net/21.15107/rcub_vinar_12118 .

Marković, Zoran, Krivošić, Ilija M., Stefanović, Predrag, Cvetinović, Dejan, Živković, Nikola V., Jovanović, Rastko, Pavlović, Zoran, "Parametarska bifurkaciona analiza slobodno oslonjenih cilindričnih ljuski" in Termotehnika, 37, no. 2 (2010):241-251,
https://hdl.handle.net/21.15107/rcub_vinar_12118 .