Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace
Само за регистроване кориснике
2019
Чланак у часопису (Објављена верзија)
,
© 2019 Elsevier Ltd
Метаподаци
Приказ свих података о документуАпстракт
Investigations suggest the need for better understanding of reactive gas-particle turbulent flow phenomena in full-scale energy systems. Numerical study was done in 350 MWe utility boiler tangentially fired furnace to clarify selected issues, such as turbulence modulation, particles dispersion, energy transfer between phases, combustion process and flame, by using an in-house developed combustion code. Numerical experiments demonstrated remarkable complexity of flow and interphase exchange. Maximal decrease in average turbulence kinetic energy of 33% due to dispersed phase was predicted for representative monodispersed coal; augmentation obtained for large particles could become attenuation due to the particles size change during combustion. Grinding fineness of polydispersed coal affected the flow, combustion and flame considerably. Fine grinding (R90 = 48.40%) provided ascending flame, higher furnace exit temperature and decrease in turbulence energy, compared with coarse grinding (R...90 = 73.85%). Combustion of each particle size class of coal is completed at different vertical levels, influencing the flame position. Diagrams based on numerical predictions were proposed to enable efficient estimations of combustion and flame characteristics in the case-study furnace, for various coal qualities and mass fractions and changed distributions of coal particle size classes over the burner tiers, while necessity for further investigation was pointed out as well. © 2019 Elsevier Ltd
Кључне речи:
Full-scale modeling / Gas-particle flow / Turbulence modulation / Pulverized coal combustion / Grinding fineness / FlameИзвор:
Energy, 2019, 179, 1036-1053Финансирање / пројекти:
- Повећање енергетске и еколошке ефикасности процеса у ложишту за угљени прах и оптимизација излазне грејне површине енергетског парног котла применом сопствених софтверских алата (RS-MESTD-Technological Development (TD or TR)-33018)
DOI: 10.1016/j.energy.2019.05.066
ISSN: 0360-5442; 1873-6785
WoS: 000472813800085
Scopus: 2-s2.0-85066069656
URI
https://linkinghub.elsevier.com/retrieve/pii/S0360544219309351https://vinar.vin.bg.ac.rs/handle/123456789/8212
Колекције
Институција/група
VinčaTY - JOUR AU - Belošević, Srđan AU - Tomanović, Ivan D. AU - Crnomarković, Nenad Đ. AU - Milićević, Aleksandar PY - 2019 UR - https://linkinghub.elsevier.com/retrieve/pii/S0360544219309351 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8212 AB - Investigations suggest the need for better understanding of reactive gas-particle turbulent flow phenomena in full-scale energy systems. Numerical study was done in 350 MWe utility boiler tangentially fired furnace to clarify selected issues, such as turbulence modulation, particles dispersion, energy transfer between phases, combustion process and flame, by using an in-house developed combustion code. Numerical experiments demonstrated remarkable complexity of flow and interphase exchange. Maximal decrease in average turbulence kinetic energy of 33% due to dispersed phase was predicted for representative monodispersed coal; augmentation obtained for large particles could become attenuation due to the particles size change during combustion. Grinding fineness of polydispersed coal affected the flow, combustion and flame considerably. Fine grinding (R90 = 48.40%) provided ascending flame, higher furnace exit temperature and decrease in turbulence energy, compared with coarse grinding (R90 = 73.85%). Combustion of each particle size class of coal is completed at different vertical levels, influencing the flame position. Diagrams based on numerical predictions were proposed to enable efficient estimations of combustion and flame characteristics in the case-study furnace, for various coal qualities and mass fractions and changed distributions of coal particle size classes over the burner tiers, while necessity for further investigation was pointed out as well. © 2019 Elsevier Ltd T2 - Energy T1 - Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace VL - 179 SP - 1036 EP - 1053 DO - 10.1016/j.energy.2019.05.066 ER -
@article{ author = "Belošević, Srđan and Tomanović, Ivan D. and Crnomarković, Nenad Đ. and Milićević, Aleksandar", year = "2019", abstract = "Investigations suggest the need for better understanding of reactive gas-particle turbulent flow phenomena in full-scale energy systems. Numerical study was done in 350 MWe utility boiler tangentially fired furnace to clarify selected issues, such as turbulence modulation, particles dispersion, energy transfer between phases, combustion process and flame, by using an in-house developed combustion code. Numerical experiments demonstrated remarkable complexity of flow and interphase exchange. Maximal decrease in average turbulence kinetic energy of 33% due to dispersed phase was predicted for representative monodispersed coal; augmentation obtained for large particles could become attenuation due to the particles size change during combustion. Grinding fineness of polydispersed coal affected the flow, combustion and flame considerably. Fine grinding (R90 = 48.40%) provided ascending flame, higher furnace exit temperature and decrease in turbulence energy, compared with coarse grinding (R90 = 73.85%). Combustion of each particle size class of coal is completed at different vertical levels, influencing the flame position. Diagrams based on numerical predictions were proposed to enable efficient estimations of combustion and flame characteristics in the case-study furnace, for various coal qualities and mass fractions and changed distributions of coal particle size classes over the burner tiers, while necessity for further investigation was pointed out as well. © 2019 Elsevier Ltd", journal = "Energy", title = "Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace", volume = "179", pages = "1036-1053", doi = "10.1016/j.energy.2019.05.066" }
Belošević, S., Tomanović, I. D., Crnomarković, N. Đ.,& Milićević, A.. (2019). Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace. in Energy, 179, 1036-1053. https://doi.org/10.1016/j.energy.2019.05.066
Belošević S, Tomanović ID, Crnomarković NĐ, Milićević A. Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace. in Energy. 2019;179:1036-1053. doi:10.1016/j.energy.2019.05.066 .
Belošević, Srđan, Tomanović, Ivan D., Crnomarković, Nenad Đ., Milićević, Aleksandar, "Full-scale CFD investigation of gas-particle flow, interactions and combustion in tangentially fired pulverized coal furnace" in Energy, 179 (2019):1036-1053, https://doi.org/10.1016/j.energy.2019.05.066 . .