Jovanović, Rastko D.

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Authority KeyName Variants
orcid::0000-0003-0265-2304
  • Jovanović, Rastko D. (12)
Projects
Pollution Reduction from Thermal Power Plants of the Public Enterprise “Electric Power Industry of Serbia” Domestic Lignite Quality and Combustion Technology Enhancement for Energy Efficiency Increase and Reduction of Harmful Gases and Particulate Matter Emissions from Thermal Power Plants of Public Enterprise ”Electric Power Industry of Serbia”
Ministry of Education, Science and Technological Development of the Republic of Serbia European Commission 6th FP through the Marie Curie Actions project INECSE (Early Stage Research Training in Integrated Energy Conversion for a Sustainable Environment) [MEST-CT-2005-021018]
European Commission, EU [MEST-CT-2005-021018] European Commission [MEST-CT-2005-021018]
RELCOM - Reliable and Efficient Combustion of Oxygen/Coal/Recycled Flue Gas Mixtures Advanced analytical, numerical and analysis methods of applied fluid mechanics and complex systems
(Polish) National Research Development Centre [SP/E/2/666420/10] Public Enterprise Electric power industry of Serbia, Belgrade, Serbia
Public Enterprise Electric power industry of Serbia, Belgrade, Serbia, European Commission 6th FP through the Marie Curie Actions project INECSE (Early Stage Research Training in Integrated Energy Conversion for a Sustainable Environment), EU [MEST-CT-2005-021018] Research Fund for Coal and Steel project: Application of the biomass, oxyfuel and flameless combustion for the utilisation of pulverised coals for electricity generation (BOFCom) [RFCR-CT-2006-00010]

Author's Bibliography

Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion

Jovanović, Rastko D.; Marek, Ewa J.

(2021)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Marek, Ewa J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9618
AB  - The study presents a new modelling approach applied to hematite to magnetite reduction, which is the dominant reaction in atmospheres with a high CO2/CO ratio, expected in chemical looping combustion. The structure of the Fe2O3 particle was simulated using the percolation theory, while the reduction was modelled using the stochastic approach to simulate nucleation, gaseous diffusion, solid-state diffusion, and chemical reaction. To account for differences between 3-D and 2-D pores, the model allowed for pore-hopping. The obtained results agreed with experimental results for Fe2O3 derived from natural ore (pyrite), and, to a lesser extent, with results for lab-synthesised Fe2O3 particles. The model provides useful insight into the complexity of the investigated process. For materials with undeveloped porosity, a simple shrinking-core approximation will be sufficient. In contrast, for materials with well-developed porosity, the models should incorporate information about the particle structure. © 2020 Elsevier B.V.
T2  - Chemical Engineering Journal
T1  - Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion
VL  - 406
DO  - 10.1016/j.cej.2020.126845
ER  - 
@article{
author = "Jovanović, Rastko D. and Marek, Ewa J.",
year = "2021",
abstract = "The study presents a new modelling approach applied to hematite to magnetite reduction, which is the dominant reaction in atmospheres with a high CO2/CO ratio, expected in chemical looping combustion. The structure of the Fe2O3 particle was simulated using the percolation theory, while the reduction was modelled using the stochastic approach to simulate nucleation, gaseous diffusion, solid-state diffusion, and chemical reaction. To account for differences between 3-D and 2-D pores, the model allowed for pore-hopping. The obtained results agreed with experimental results for Fe2O3 derived from natural ore (pyrite), and, to a lesser extent, with results for lab-synthesised Fe2O3 particles. The model provides useful insight into the complexity of the investigated process. For materials with undeveloped porosity, a simple shrinking-core approximation will be sufficient. In contrast, for materials with well-developed porosity, the models should incorporate information about the particle structure. © 2020 Elsevier B.V.",
journal = "Chemical Engineering Journal",
title = "Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion",
volume = "406",
doi = "10.1016/j.cej.2020.126845"
}
Jovanović, R. D.,& Marek, E. J.. (2021). Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion. in Chemical Engineering Journal, 406.
https://doi.org/10.1016/j.cej.2020.126845
Jovanović RD, Marek EJ. Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion. in Chemical Engineering Journal. 2021;406.
doi:10.1016/j.cej.2020.126845 .
Jovanović, Rastko D., Marek, Ewa J., "Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion" in Chemical Engineering Journal, 406 (2021),
https://doi.org/10.1016/j.cej.2020.126845 . .

Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach

Davidović, M.; Davidović, M.; Jovanović, Rastko D.; Kolarž, Predrag M.; Jovašević-Stojanović, Milena; Ristovski, Zoran

(2020)

TY  - JOUR
AU  - Davidović, M.
AU  - Davidović, M.
AU  - Jovanović, Rastko D.
AU  - Kolarž, Predrag M.
AU  - Jovašević-Stojanović, Milena
AU  - Ristovski, Zoran
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9621
AB  - In this work we explore the relationship between particulate matter (PM) and small ion (SI) concentration in a typical indoor elementary school environment. A range of important air quality parameters (radon, PM, SI, temperature, humidity) were measured in two elementary schools located in urban background and suburban area in Belgrade city, Serbia. We focus on an interplay between concentrations of radon, small ions (SI) and particulate matter (PM) and for this purpose, we utilize two approaches. The first approach is based on a balance equation which is used to derive approximate relation between concentration of small ions and particulate matter. The form of the obtained relation suggests physics based linear regression modelling. The second approach is more data driven and utilizes machine learning techniques, and in this approach, we develop a more complex statistical model. This paper attempts to put together these two methods into a practical statistical modelling approach that would be more useful than either approach alone. The artificial neural network model enabled prediction of small ion concentration based on radon and particulate matter measurements. Models achieved median absolute error of about 40 ions/cm3 and explained variance of about 0.7. This could potentially enable more simple measurement campaigns, where a smaller number of parameters would be measured, but still allowing for similar insights. © 2020 by the authors.
T2  - Applied Sciences (Switzerland)
T1  - Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach
VL  - 10
IS  - 17
DO  - 10.3390/app10175939
ER  - 
@article{
author = "Davidović, M. and Davidović, M. and Jovanović, Rastko D. and Kolarž, Predrag M. and Jovašević-Stojanović, Milena and Ristovski, Zoran",
year = "2020",
abstract = "In this work we explore the relationship between particulate matter (PM) and small ion (SI) concentration in a typical indoor elementary school environment. A range of important air quality parameters (radon, PM, SI, temperature, humidity) were measured in two elementary schools located in urban background and suburban area in Belgrade city, Serbia. We focus on an interplay between concentrations of radon, small ions (SI) and particulate matter (PM) and for this purpose, we utilize two approaches. The first approach is based on a balance equation which is used to derive approximate relation between concentration of small ions and particulate matter. The form of the obtained relation suggests physics based linear regression modelling. The second approach is more data driven and utilizes machine learning techniques, and in this approach, we develop a more complex statistical model. This paper attempts to put together these two methods into a practical statistical modelling approach that would be more useful than either approach alone. The artificial neural network model enabled prediction of small ion concentration based on radon and particulate matter measurements. Models achieved median absolute error of about 40 ions/cm3 and explained variance of about 0.7. This could potentially enable more simple measurement campaigns, where a smaller number of parameters would be measured, but still allowing for similar insights. © 2020 by the authors.",
journal = "Applied Sciences (Switzerland)",
title = "Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach",
volume = "10",
number = "17",
doi = "10.3390/app10175939"
}
Davidović, M., Davidović, M., Jovanović, R. D., Kolarž, P. M., Jovašević-Stojanović, M.,& Ristovski, Z.. (2020). Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach. in Applied Sciences (Switzerland), 10(17).
https://doi.org/10.3390/app10175939
Davidović M, Davidović M, Jovanović RD, Kolarž PM, Jovašević-Stojanović M, Ristovski Z. Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach. in Applied Sciences (Switzerland). 2020;10(17).
doi:10.3390/app10175939 .
Davidović, M., Davidović, M., Jovanović, Rastko D., Kolarž, Predrag M., Jovašević-Stojanović, Milena, Ristovski, Zoran, "Modeling indoor particulate matter and small ion concentration relationship-A comparison of a balance equation approach and data driven approach" in Applied Sciences (Switzerland), 10, no. 17 (2020),
https://doi.org/10.3390/app10175939 . .

Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation

Jovanović, Rastko D.; Živković, Marija M.

(2020)

TY  - CHAP
AU  - Jovanović, Rastko D.
AU  - Živković, Marija M.
PY  - 2020
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8522
AB  - Polycyclic aromatic hydrocarbons (PAHs) are considered to be major air pollutants with a strong negative influence on human health. Many of them are toxic with high carcinogenic potential. Children and school staff spend a significant portion of daytime at schools, mostly indoors. Therefore, the hypothesis can be made that air quality significantly impacts their health. A health risk assessment, performed by calculating Incremental lifetime cancer risk (ILCR), was conducted in the framework of this study. Indoor and outdoor PAHs concentrations were measured in typical Serbian primary school. Total suspended particles (TSP) and gas-phase PAHs from the air were collected both inside the school building and in the outside school environment. Average indoor and outdoor PAHs concentrations were used to calculate benzo[a]pyrene equivalent (BaPeq) concentration. A significantly higher BaPeq was observed in the gas-phase than in the TSP, due to a high amount of low molecular PAHs present in the gas-phase. The measured BaPeq concentration values were fitted to the appropriate mathematical distribution and used as an input parameter for stochastic ILCR modeling. Different body weight and inhalation rate distributions were used for sampling during ILCR calculations. The performed sensitivity analysis showed that the two different recommended values of cancer slope factor had a major impact on the ILCR values. Based on this, it was decided to perform simulations using cancer slope factors for individual PAHs. The obtained ILCR values for both children and adults were greater than the allowed level, indicating high potential lung cancer risk. It may be concluded that it is necessary to improve indoor air quality in schools applying measures for lowering TSP PAHs with high carcinogenic potential. © Springer Nature Switzerland AG 2020.
T2  - Lecture Notes in Networks and Systems
T1  - Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation
VL  - 90
SP  - 203
EP  - 220
DO  - 10.1007/978-3-030-30853-7_12
ER  - 
@inbook{
author = "Jovanović, Rastko D. and Živković, Marija M.",
year = "2020",
abstract = "Polycyclic aromatic hydrocarbons (PAHs) are considered to be major air pollutants with a strong negative influence on human health. Many of them are toxic with high carcinogenic potential. Children and school staff spend a significant portion of daytime at schools, mostly indoors. Therefore, the hypothesis can be made that air quality significantly impacts their health. A health risk assessment, performed by calculating Incremental lifetime cancer risk (ILCR), was conducted in the framework of this study. Indoor and outdoor PAHs concentrations were measured in typical Serbian primary school. Total suspended particles (TSP) and gas-phase PAHs from the air were collected both inside the school building and in the outside school environment. Average indoor and outdoor PAHs concentrations were used to calculate benzo[a]pyrene equivalent (BaPeq) concentration. A significantly higher BaPeq was observed in the gas-phase than in the TSP, due to a high amount of low molecular PAHs present in the gas-phase. The measured BaPeq concentration values were fitted to the appropriate mathematical distribution and used as an input parameter for stochastic ILCR modeling. Different body weight and inhalation rate distributions were used for sampling during ILCR calculations. The performed sensitivity analysis showed that the two different recommended values of cancer slope factor had a major impact on the ILCR values. Based on this, it was decided to perform simulations using cancer slope factors for individual PAHs. The obtained ILCR values for both children and adults were greater than the allowed level, indicating high potential lung cancer risk. It may be concluded that it is necessary to improve indoor air quality in schools applying measures for lowering TSP PAHs with high carcinogenic potential. © Springer Nature Switzerland AG 2020.",
journal = "Lecture Notes in Networks and Systems",
booktitle = "Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation",
volume = "90",
pages = "203-220",
doi = "10.1007/978-3-030-30853-7_12"
}
Jovanović, R. D.,& Živković, M. M.. (2020). Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation. in Lecture Notes in Networks and Systems, 90, 203-220.
https://doi.org/10.1007/978-3-030-30853-7_12
Jovanović RD, Živković MM. Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation. in Lecture Notes in Networks and Systems. 2020;90:203-220.
doi:10.1007/978-3-030-30853-7_12 .
Jovanović, Rastko D., Živković, Marija M., "Probabilistic Simulation of Incremental Lifetime Cancer Risk of Children and Adults Exposed to the Polycyclic Aromatic Hydrocarbons – PAHs in Primary School Environment in Serbia, Model Development and Validation" in Lecture Notes in Networks and Systems, 90 (2020):203-220,
https://doi.org/10.1007/978-3-030-30853-7_12 . .

Mathematical modelling of swirl oxy-fuel burner flame characteristics

Jovanović, Rastko D.; Swiatkowski, Bartosz; Kakietek, Slawomir; Škobalj, Predrag D.; Lazović, Ivan; Cvetinović, Dejan

(2019)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Swiatkowski, Bartosz
AU  - Kakietek, Slawomir
AU  - Škobalj, Predrag D.
AU  - Lazović, Ivan
AU  - Cvetinović, Dejan
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S019689041930439X
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8149
AB  - Oxy-fuel combustion is the most promising carbon capture and storage technology, which eliminates carbon dioxide emissions into the atmosphere and also decreases nitrogen oxides emissions thereby lowering global warming potential. In order to implement oxy-fuel combustion technology in full scale power plants, its costs, mainly connected with the amount of pure oxygen produced, must be lowered. The main hypothesis is that it is possible to maintain similar velocity and heat transfer distribution while maintaining stable and efficient burner operation during both combustion technologies modifying burner aerodynamics. Excess oxygen is chosen as a representative parameter of burner's performance and investigation is carried out for four different oxy-fuel burner oxygen excess ratios (λ: 0.8, 0.98, 1.07, and 1.24) together with reference air combustion case. This study suggests a workflow, based on semi-industrial experimental investigations and computational fluid dynamics model composed of advanced sub-models for different combustion phases for development of real scale dual-mode coal swirl burners able for efficient operation during both combustion regimes. The results show that the temperature in near-burner zone and nitrogen oxides emissions increase, while carbon monoxide emissions decrease with the increase of burner oxygen excess ratio, and stable combustion with similar velocity and temperature distributions for both combustion modes is achieved for oxygen excess ratio of 1.07, with decrease in nitrogen oxides and carbon monoxide emissions during oxy-fuel combustion. The performed study demonstrates that it is possible to choose the appropriate burner settings regarding nitrogen oxides and carbon monoxide emissions and burner's ability to operate stably in both air and oxy-fuel combustion modes. © 2019 Elsevier Ltd
T2  - Energy Conversion and Management
T1  - Mathematical modelling of swirl oxy-fuel burner flame characteristics
VL  - 191
SP  - 193
EP  - 207
DO  - 10.1016/j.enconman.2019.04.027
ER  - 
@article{
author = "Jovanović, Rastko D. and Swiatkowski, Bartosz and Kakietek, Slawomir and Škobalj, Predrag D. and Lazović, Ivan and Cvetinović, Dejan",
year = "2019",
abstract = "Oxy-fuel combustion is the most promising carbon capture and storage technology, which eliminates carbon dioxide emissions into the atmosphere and also decreases nitrogen oxides emissions thereby lowering global warming potential. In order to implement oxy-fuel combustion technology in full scale power plants, its costs, mainly connected with the amount of pure oxygen produced, must be lowered. The main hypothesis is that it is possible to maintain similar velocity and heat transfer distribution while maintaining stable and efficient burner operation during both combustion technologies modifying burner aerodynamics. Excess oxygen is chosen as a representative parameter of burner's performance and investigation is carried out for four different oxy-fuel burner oxygen excess ratios (λ: 0.8, 0.98, 1.07, and 1.24) together with reference air combustion case. This study suggests a workflow, based on semi-industrial experimental investigations and computational fluid dynamics model composed of advanced sub-models for different combustion phases for development of real scale dual-mode coal swirl burners able for efficient operation during both combustion regimes. The results show that the temperature in near-burner zone and nitrogen oxides emissions increase, while carbon monoxide emissions decrease with the increase of burner oxygen excess ratio, and stable combustion with similar velocity and temperature distributions for both combustion modes is achieved for oxygen excess ratio of 1.07, with decrease in nitrogen oxides and carbon monoxide emissions during oxy-fuel combustion. The performed study demonstrates that it is possible to choose the appropriate burner settings regarding nitrogen oxides and carbon monoxide emissions and burner's ability to operate stably in both air and oxy-fuel combustion modes. © 2019 Elsevier Ltd",
journal = "Energy Conversion and Management",
title = "Mathematical modelling of swirl oxy-fuel burner flame characteristics",
volume = "191",
pages = "193-207",
doi = "10.1016/j.enconman.2019.04.027"
}
Jovanović, R. D., Swiatkowski, B., Kakietek, S., Škobalj, P. D., Lazović, I.,& Cvetinović, D.. (2019). Mathematical modelling of swirl oxy-fuel burner flame characteristics. in Energy Conversion and Management, 191, 193-207.
https://doi.org/10.1016/j.enconman.2019.04.027
Jovanović RD, Swiatkowski B, Kakietek S, Škobalj PD, Lazović I, Cvetinović D. Mathematical modelling of swirl oxy-fuel burner flame characteristics. in Energy Conversion and Management. 2019;191:193-207.
doi:10.1016/j.enconman.2019.04.027 .
Jovanović, Rastko D., Swiatkowski, Bartosz, Kakietek, Slawomir, Škobalj, Predrag D., Lazović, Ivan, Cvetinović, Dejan, "Mathematical modelling of swirl oxy-fuel burner flame characteristics" in Energy Conversion and Management, 191 (2019):193-207,
https://doi.org/10.1016/j.enconman.2019.04.027 . .
10
9
10

Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B

Erić, Milić; Stefanović, Predrag Lj.; Marković, Zoran M.; Jovanović, Rastko D.; Lazović, Ivan; Živković, Nikola V.; Ilić, Željko

(2018)

TY  - JOUR
AU  - Erić, Milić
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran M.
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  - http://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 M. 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. M., 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 ZM, 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 M., 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 . .
1
3
3

Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions

Jovanović, Rastko D.; Strug, Krzysztof; Swiatkowski, Bartosz; Kakietek, Slawomir; Jagiello, Krzysztof; Cvetinović, Dejan

(2017)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Strug, Krzysztof
AU  - Swiatkowski, Bartosz
AU  - Kakietek, Slawomir
AU  - Jagiello, Krzysztof
AU  - Cvetinović, Dejan
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1630
AB  - Oxy-fuel coal combustion, together with carbon capture and storage or utilization, is a set of technologies allowing to burn coal without emitting globe warming CO2. As it is expected that oxy-fuel combustion may be used for a retrofit of existing boilers, development of a novel oxy-burners is very important step. It is expected that these burners will be able to sustain stable flame in oxy-fuel conditions, but also, for start-up and emergency reasons, in conventional, air conditions. The most cost effective way of achieving dual-mode boilers is to introduce dual-mode burners. Numerical simulations allow investigation of new designs and technologies at a relatively low cost, but for the results to be trustworthy they need to be validated This paper proposes a workflow for design, modeling, and validation of dual-mode burners by combining experimental investigation and numerical simulations. Experiments are performed with semi-industrial scale burners in 0.5 MW, test facility for flame investigation. Novel CFD model based on ANSYS FLUENT solver, with special consideration of coal combustion process, especially regarding devolatilization, ignition, gaseous and surface reactions, NOx formation, and radiation was suggested The main model feature is its ability to simulate pulverized coal combustion under different combusting atmospheres, and thus is suitable for both air and oxy-fuel combustion simulations. Using the proposed methodology two designs of pulverized coal burners have been investigated both experimentally and numerically giving consistent results. The improved burner design proved to be a more flexible device, achieving stable ignition and combustion during both combustion regimes: conventional in air and oxy-fuel in a mixture of O-2 and CO2 (representing dry recycledflue gas with high CO2 content). The proposed framework is expected to be of use for further improvement of multi-mode pulverized fuel swirl burners but can be also used for independent designs evaluation.
T2  - Thermal Science
T1  - Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions
VL  - 21
IS  - 3
SP  - 1463
EP  - 1477
DO  - 10.2298/TSCI161110325J
ER  - 
@article{
author = "Jovanović, Rastko D. and Strug, Krzysztof and Swiatkowski, Bartosz and Kakietek, Slawomir and Jagiello, Krzysztof and Cvetinović, Dejan",
year = "2017",
abstract = "Oxy-fuel coal combustion, together with carbon capture and storage or utilization, is a set of technologies allowing to burn coal without emitting globe warming CO2. As it is expected that oxy-fuel combustion may be used for a retrofit of existing boilers, development of a novel oxy-burners is very important step. It is expected that these burners will be able to sustain stable flame in oxy-fuel conditions, but also, for start-up and emergency reasons, in conventional, air conditions. The most cost effective way of achieving dual-mode boilers is to introduce dual-mode burners. Numerical simulations allow investigation of new designs and technologies at a relatively low cost, but for the results to be trustworthy they need to be validated This paper proposes a workflow for design, modeling, and validation of dual-mode burners by combining experimental investigation and numerical simulations. Experiments are performed with semi-industrial scale burners in 0.5 MW, test facility for flame investigation. Novel CFD model based on ANSYS FLUENT solver, with special consideration of coal combustion process, especially regarding devolatilization, ignition, gaseous and surface reactions, NOx formation, and radiation was suggested The main model feature is its ability to simulate pulverized coal combustion under different combusting atmospheres, and thus is suitable for both air and oxy-fuel combustion simulations. Using the proposed methodology two designs of pulverized coal burners have been investigated both experimentally and numerically giving consistent results. The improved burner design proved to be a more flexible device, achieving stable ignition and combustion during both combustion regimes: conventional in air and oxy-fuel in a mixture of O-2 and CO2 (representing dry recycledflue gas with high CO2 content). The proposed framework is expected to be of use for further improvement of multi-mode pulverized fuel swirl burners but can be also used for independent designs evaluation.",
journal = "Thermal Science",
title = "Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions",
volume = "21",
number = "3",
pages = "1463-1477",
doi = "10.2298/TSCI161110325J"
}
Jovanović, R. D., Strug, K., Swiatkowski, B., Kakietek, S., Jagiello, K.,& Cvetinović, D.. (2017). Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions. in Thermal Science, 21(3), 1463-1477.
https://doi.org/10.2298/TSCI161110325J
Jovanović RD, Strug K, Swiatkowski B, Kakietek S, Jagiello K, Cvetinović D. Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions. in Thermal Science. 2017;21(3):1463-1477.
doi:10.2298/TSCI161110325J .
Jovanović, Rastko D., Strug, Krzysztof, Swiatkowski, Bartosz, Kakietek, Slawomir, Jagiello, Krzysztof, Cvetinović, Dejan, "Experimental and Numerical Investigation of Flame Characteristics During Swirl Burner Operation under Conventional and Oxy-Fuel Conditions" in Thermal Science, 21, no. 3 (2017):1463-1477,
https://doi.org/10.2298/TSCI161110325J . .
9
9
10

Novel Fragmentation Model for Pulverized Coal Particles Gasification in Low Temperature Air Thermal Plasma

Jovanović, Rastko D.; Cvetinović, Dejan; Stefanović, Predrag Lj.; Škobalj, Predrag D.; Marković, Zoran M.

(2016)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Škobalj, Predrag D.
AU  - Marković, Zoran M.
PY  - 2016
UR  - http://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 M.",
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. M.. (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 ZM. 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 M., "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 . .
2
3

Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions

Jovanović, Rastko D.; Marek, Ewa; Maletić, Slobodan; Cvetinović, Dejan; Marković, Zoran M.

(2015)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Marek, Ewa
AU  - Maletić, Slobodan
AU  - Cvetinović, Dejan
AU  - Marković, Zoran M.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7066
AB  - A descriptive model for isolated char particle combustion under conventional and oxy-fuel conditions was developed. Suggested model is based on the percolation theory and Monte Carlo simulation technique. Char particle was modeled as a square lattice consisting of a large number of small sites. Sites correspond either to fixed carbon, ash, or pore, and they were distributed randomly inside char lattice using percolation concept, at the start of simulation. Random walk model was used to represent gaseous species diffusion through particle pores. Char combustion was modeled using power law Arrhenius model which assumes that reaction rate depends of particle temperature and oxygen partial pressure on particle surface. The main aim of the proposed model was to take into account influence of heterogeneous char particle structure to randomness of the char combustion process. The suggested models behavior was validated by qualitative comparison with experimental data obtained in single particle reactor. It was found that simulated combustion time, char burnout and particle temperature values are in good agreement with experimentally determined data. Special emphasis was given to the CO2 gasification reaction influence on char conversion and particle temperature values. Further development of the proposed model with appropriate simplifications would enable its inclusion in comprehensive CFD codes. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Fuel
T1  - Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions
VL  - 151
SP  - 172
EP  - 181
DO  - 10.1016/j.fuel.2015.02.104
ER  - 
@article{
author = "Jovanović, Rastko D. and Marek, Ewa and Maletić, Slobodan and Cvetinović, Dejan and Marković, Zoran M.",
year = "2015",
abstract = "A descriptive model for isolated char particle combustion under conventional and oxy-fuel conditions was developed. Suggested model is based on the percolation theory and Monte Carlo simulation technique. Char particle was modeled as a square lattice consisting of a large number of small sites. Sites correspond either to fixed carbon, ash, or pore, and they were distributed randomly inside char lattice using percolation concept, at the start of simulation. Random walk model was used to represent gaseous species diffusion through particle pores. Char combustion was modeled using power law Arrhenius model which assumes that reaction rate depends of particle temperature and oxygen partial pressure on particle surface. The main aim of the proposed model was to take into account influence of heterogeneous char particle structure to randomness of the char combustion process. The suggested models behavior was validated by qualitative comparison with experimental data obtained in single particle reactor. It was found that simulated combustion time, char burnout and particle temperature values are in good agreement with experimentally determined data. Special emphasis was given to the CO2 gasification reaction influence on char conversion and particle temperature values. Further development of the proposed model with appropriate simplifications would enable its inclusion in comprehensive CFD codes. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Fuel",
title = "Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions",
volume = "151",
pages = "172-181",
doi = "10.1016/j.fuel.2015.02.104"
}
Jovanović, R. D., Marek, E., Maletić, S., Cvetinović, D.,& Marković, Z. M.. (2015). Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions. in Fuel, 151, 172-181.
https://doi.org/10.1016/j.fuel.2015.02.104
Jovanović RD, Marek E, Maletić S, Cvetinović D, Marković ZM. Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions. in Fuel. 2015;151:172-181.
doi:10.1016/j.fuel.2015.02.104 .
Jovanović, Rastko D., Marek, Ewa, Maletić, Slobodan, Cvetinović, Dejan, Marković, Zoran M., "Lattice Monte Carlo simulation of single coal char particle combustion under oxy-fuel conditions" in Fuel, 151 (2015):172-181,
https://doi.org/10.1016/j.fuel.2015.02.104 . .
16
17
18

Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process

Jovanović, Rastko D.; Cvetinović, Dejan; Erić, Milić D.; Rasuo, Bosko; Adžić, Miroljub M.

(2014)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Cvetinović, Dejan
AU  - Erić, Milić D.
AU  - Rasuo, Bosko
AU  - Adžić, Miroljub M.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5955
AB  - Numerical modeling is widely used tool for prediction of combustion processes. Computational Fluid Dynamics - CFD models use three kinetic rates for description of the coal combustion processes: coal devolatilization, volatile combustion and char combustion. Reported rates for coal devolatilization vary considerably among the authors depending on the type of experimental systems used in describing the phenomenon. Accurate representation of devolatilization process is necessary in order to perform successful CFD calculations of pulverized coal combustion and gasification. The subject of this work is numerical modeling of Serbian lignite pulverized coal devolatilization in drop tube type laboratory scale reactor. The aim of this study is to evaluate the influence of different devolatilization kinetic factors on total devolatilization time in numerical modeling of pulverized Serbian lignite devolatilization. Nine different devolatilization kinetic rates mostly used in devolatilization numerical modeling are compared in the presented work. (c) 2014 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process
VL  - 72
SP  - 489
EP  - 500
DO  - 10.1016/j.ijheatmasstransfer.2014.01.036
ER  - 
@article{
author = "Jovanović, Rastko D. and Cvetinović, Dejan and Erić, Milić D. and Rasuo, Bosko and Adžić, Miroljub M.",
year = "2014",
abstract = "Numerical modeling is widely used tool for prediction of combustion processes. Computational Fluid Dynamics - CFD models use three kinetic rates for description of the coal combustion processes: coal devolatilization, volatile combustion and char combustion. Reported rates for coal devolatilization vary considerably among the authors depending on the type of experimental systems used in describing the phenomenon. Accurate representation of devolatilization process is necessary in order to perform successful CFD calculations of pulverized coal combustion and gasification. The subject of this work is numerical modeling of Serbian lignite pulverized coal devolatilization in drop tube type laboratory scale reactor. The aim of this study is to evaluate the influence of different devolatilization kinetic factors on total devolatilization time in numerical modeling of pulverized Serbian lignite devolatilization. Nine different devolatilization kinetic rates mostly used in devolatilization numerical modeling are compared in the presented work. (c) 2014 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process",
volume = "72",
pages = "489-500",
doi = "10.1016/j.ijheatmasstransfer.2014.01.036"
}
Jovanović, R. D., Cvetinović, D., Erić, M. D., Rasuo, B.,& Adžić, M. M.. (2014). Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process. in International Journal of Heat and Mass Transfer, 72, 489-500.
https://doi.org/10.1016/j.ijheatmasstransfer.2014.01.036
Jovanović RD, Cvetinović D, Erić MD, Rasuo B, Adžić MM. Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process. in International Journal of Heat and Mass Transfer. 2014;72:489-500.
doi:10.1016/j.ijheatmasstransfer.2014.01.036 .
Jovanović, Rastko D., Cvetinović, Dejan, Erić, Milić D., Rasuo, Bosko, Adžić, Miroljub M., "Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process" in International Journal of Heat and Mass Transfer, 72 (2014):489-500,
https://doi.org/10.1016/j.ijheatmasstransfer.2014.01.036 . .
5
6
6

Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions

Jovanović, Rastko D.; Rasuo, Basko; Stefanović, Predrag Lj.; Cvetinović, Dejan; Swiatkowski, Bartosz

(2013)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Rasuo, Basko
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Swiatkowski, Bartosz
PY  - 2013
UR  - http://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 . .
15
15
19

Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres

Jovanović, Rastko D.; Milewska, Aleksandra; Swiatkowski, Bartosz; Goanta, Adrian; Spliethoff, Hartmut

(2012)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Milewska, Aleksandra
AU  - Swiatkowski, Bartosz
AU  - Goanta, Adrian
AU  - Spliethoff, Hartmut
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6975
AB  - Oxy-fuel combustion is considered as a promising solution to reduce greenhouse-gases and pollutant emissions. The main advantage of oxy-fuel combustion over other technologies for pollution reduction from pulverized coal combustion is that it can be applied to the existing coal-fired power plants. However, switching from conventional to oxy-fired coal combustion brings significant challenges. One of the most important is change of pulverized coal ignition characteristics. This paper presents the results of experimental and numerical analysis of ignition phenomena under oxy-fuel conditions. The main focus of the presented paper is to evaluate the effectiveness of the mathematical devolatilisation sub-model, in predicting the ignition point of pulverized coal flames under oxy-firing conditions. Regarding this, the performance of several devolatilisation models, from simple to more complex ones, in predicting ignition point position have been investigated. Numerically determined values of the ignition point position, and ignition temperature for various O-2-N-2 and O-2-CO2 conditions were compared with experimental data from the laboratory ignition test facility. Obtained results pointed out that network devolatilisation models (CPD and FG) give more accurate results in comparison with standard devolatilisation models (single rate and two competing rates). The best performance is achieved using FG devolatilisation model. Thus, newly implemented FG model will be used for future numerical simulations of oxy-fuel pulverized coal combustion on 0.5 MW pilot plant facility. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Fuel
T1  - Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres
VL  - 101
SP  - 23
EP  - 37
DO  - 10.1016/j.fuel.2011.02.024
ER  - 
@article{
author = "Jovanović, Rastko D. and Milewska, Aleksandra and Swiatkowski, Bartosz and Goanta, Adrian and Spliethoff, Hartmut",
year = "2012",
abstract = "Oxy-fuel combustion is considered as a promising solution to reduce greenhouse-gases and pollutant emissions. The main advantage of oxy-fuel combustion over other technologies for pollution reduction from pulverized coal combustion is that it can be applied to the existing coal-fired power plants. However, switching from conventional to oxy-fired coal combustion brings significant challenges. One of the most important is change of pulverized coal ignition characteristics. This paper presents the results of experimental and numerical analysis of ignition phenomena under oxy-fuel conditions. The main focus of the presented paper is to evaluate the effectiveness of the mathematical devolatilisation sub-model, in predicting the ignition point of pulverized coal flames under oxy-firing conditions. Regarding this, the performance of several devolatilisation models, from simple to more complex ones, in predicting ignition point position have been investigated. Numerically determined values of the ignition point position, and ignition temperature for various O-2-N-2 and O-2-CO2 conditions were compared with experimental data from the laboratory ignition test facility. Obtained results pointed out that network devolatilisation models (CPD and FG) give more accurate results in comparison with standard devolatilisation models (single rate and two competing rates). The best performance is achieved using FG devolatilisation model. Thus, newly implemented FG model will be used for future numerical simulations of oxy-fuel pulverized coal combustion on 0.5 MW pilot plant facility. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Fuel",
title = "Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres",
volume = "101",
pages = "23-37",
doi = "10.1016/j.fuel.2011.02.024"
}
Jovanović, R. D., Milewska, A., Swiatkowski, B., Goanta, A.,& Spliethoff, H.. (2012). Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres. in Fuel, 101, 23-37.
https://doi.org/10.1016/j.fuel.2011.02.024
Jovanović RD, Milewska A, Swiatkowski B, Goanta A, Spliethoff H. Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres. in Fuel. 2012;101:23-37.
doi:10.1016/j.fuel.2011.02.024 .
Jovanović, Rastko D., Milewska, Aleksandra, Swiatkowski, Bartosz, Goanta, Adrian, Spliethoff, Hartmut, "Sensitivity analysis of different devolatilisation models on predicting ignition point position during pulverized coal combustion in O-2/N-2 and O-2/CO2 atmospheres" in Fuel, 101 (2012):23-37,
https://doi.org/10.1016/j.fuel.2011.02.024 . .
35
33
41

Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators

Jovanović, Rastko D.; Swiatkowski, Bartosz; Cvetinović, Dejan; Stefanović, Predrag Lj.; Marković, Zoran M.; Pavlović, Zoran

(2007)

TY  - CONF
AU  - Jovanović, Rastko D.
AU  - Swiatkowski, Bartosz
AU  - Cvetinović, Dejan
AU  - Stefanović, Predrag Lj.
AU  - Marković, Zoran M.
AU  - Pavlović, Zoran
PY  - 2007
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6703
AB  - The subject of this work is turbulent two-phase flow through air-coal channel(s) of complex geometry. The aim of this work is numerical optimization of fluid flow and coal particles distribution. A few proposed variants of the single blade turbulator, which has a role to increase turbulence in vertical section of air-coal mixture channel, were numerically investigated. More uniform coal particle distribution was achieved using single blade turbulators.
C3  - AIP Conference Proceedings
T1  - Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators
VL  - 936
SP  - 300
EP  - +
ER  - 
@conference{
author = "Jovanović, Rastko D. and Swiatkowski, Bartosz and Cvetinović, Dejan and Stefanović, Predrag Lj. and Marković, Zoran M. and Pavlović, Zoran",
year = "2007",
abstract = "The subject of this work is turbulent two-phase flow through air-coal channel(s) of complex geometry. The aim of this work is numerical optimization of fluid flow and coal particles distribution. A few proposed variants of the single blade turbulator, which has a role to increase turbulence in vertical section of air-coal mixture channel, were numerically investigated. More uniform coal particle distribution was achieved using single blade turbulators.",
journal = "AIP Conference Proceedings",
title = "Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators",
volume = "936",
pages = "300-+"
}
Jovanović, R. D., Swiatkowski, B., Cvetinović, D., Stefanović, P. Lj., Marković, Z. M.,& Pavlović, Z.. (2007). Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators. in AIP Conference Proceedings, 936, 300-+.
Jovanović RD, Swiatkowski B, Cvetinović D, Stefanović PL, Marković ZM, Pavlović Z. Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators. in AIP Conference Proceedings. 2007;936:300-+..
Jovanović, Rastko D., Swiatkowski, Bartosz, Cvetinović, Dejan, Stefanović, Predrag Lj., Marković, Zoran M., Pavlović, Zoran, "Turbulent two-phase flow Modeling of air-coal mixture channels with single blade turbulators" in AIP Conference Proceedings, 936 (2007):300-+.
2