Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases
Само за регистроване кориснике
2014
Аутори
Crnomarković, NenadSijerčić, Miroslav
Belošević, Srđan V.
Tucaković, Dragan
Živanović, Titoslav
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The objective of the research was to find if an agreement of the results of a numerical investigation with experimental data could be achieved considering the two-phase medium in thermal equilibrium. Influence of the gray radiative properties on the radiative heat exchange inside pulverized lignite fired furnaces was investigated using the computational fluid dynamics (CFD) code based on a comprehensive mathematical model of the process. Radiative heat exchange was calculated using Hottel's zonal model. Heat transfer rates and wall fluxes increased for small values of the total extinction coefficient, K-t lt 0.2 m(-1); decreased for large values of K-t, K-t > 2.0 m(-1); and were maximal for moderate values of K-t, 0.2 lt K-t lt 2.0 m(-1). Heat transfer rates and wall fluxes decreased with the increase of the scattering albedo, though the decrease was considerable only for omega > 0.5. Agreement with the experimental data was obtained for the moderate values of the K-t and for sca...ttering albedo 0.1 lt omega lt 0.5.
Кључне речи:
Thermal equilibrium / Radiative heat exchange / Pulverized lignite fired furnace / Hottel's zonal model / Gray radiative propertiesИзвор:
International Journal of Thermal Sciences, 2014, 85, 21-28Издавач:
- Elsevier France-Editions Scientifiques Medicales Elsevier, Paris
Финансирање / 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.ijthermalsci.2014.06.014
ISSN: 1290-0729
WoS: 000341744200003
Scopus: 2-s2.0-84904200014
Институција/група
Inovacioni centarTY - JOUR AU - Crnomarković, Nenad AU - Sijerčić, Miroslav AU - Belošević, Srđan V. AU - Tucaković, Dragan AU - Živanović, Titoslav PY - 2014 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1910 AB - The objective of the research was to find if an agreement of the results of a numerical investigation with experimental data could be achieved considering the two-phase medium in thermal equilibrium. Influence of the gray radiative properties on the radiative heat exchange inside pulverized lignite fired furnaces was investigated using the computational fluid dynamics (CFD) code based on a comprehensive mathematical model of the process. Radiative heat exchange was calculated using Hottel's zonal model. Heat transfer rates and wall fluxes increased for small values of the total extinction coefficient, K-t lt 0.2 m(-1); decreased for large values of K-t, K-t > 2.0 m(-1); and were maximal for moderate values of K-t, 0.2 lt K-t lt 2.0 m(-1). Heat transfer rates and wall fluxes decreased with the increase of the scattering albedo, though the decrease was considerable only for omega > 0.5. Agreement with the experimental data was obtained for the moderate values of the K-t and for scattering albedo 0.1 lt omega lt 0.5. PB - Elsevier France-Editions Scientifiques Medicales Elsevier, Paris T2 - International Journal of Thermal Sciences T1 - Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases EP - 28 SP - 21 VL - 85 DO - 10.1016/j.ijthermalsci.2014.06.014 ER -
@article{ author = "Crnomarković, Nenad and Sijerčić, Miroslav and Belošević, Srđan V. and Tucaković, Dragan and Živanović, Titoslav", year = "2014", abstract = "The objective of the research was to find if an agreement of the results of a numerical investigation with experimental data could be achieved considering the two-phase medium in thermal equilibrium. Influence of the gray radiative properties on the radiative heat exchange inside pulverized lignite fired furnaces was investigated using the computational fluid dynamics (CFD) code based on a comprehensive mathematical model of the process. Radiative heat exchange was calculated using Hottel's zonal model. Heat transfer rates and wall fluxes increased for small values of the total extinction coefficient, K-t lt 0.2 m(-1); decreased for large values of K-t, K-t > 2.0 m(-1); and were maximal for moderate values of K-t, 0.2 lt K-t lt 2.0 m(-1). Heat transfer rates and wall fluxes decreased with the increase of the scattering albedo, though the decrease was considerable only for omega > 0.5. Agreement with the experimental data was obtained for the moderate values of the K-t and for scattering albedo 0.1 lt omega lt 0.5.", publisher = "Elsevier France-Editions Scientifiques Medicales Elsevier, Paris", journal = "International Journal of Thermal Sciences", title = "Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases", pages = "28-21", volume = "85", doi = "10.1016/j.ijthermalsci.2014.06.014" }
Crnomarković, N., Sijerčić, M., Belošević, S. V., Tucaković, D.,& Živanović, T.. (2014). Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases. in International Journal of Thermal Sciences Elsevier France-Editions Scientifiques Medicales Elsevier, Paris., 85, 21-28. https://doi.org/10.1016/j.ijthermalsci.2014.06.014
Crnomarković N, Sijerčić M, Belošević SV, Tucaković D, Živanović T. Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases. in International Journal of Thermal Sciences. 2014;85:21-28. doi:10.1016/j.ijthermalsci.2014.06.014 .
Crnomarković, Nenad, Sijerčić, Miroslav, Belošević, Srđan V., Tucaković, Dragan, Živanović, Titoslav, "Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases" in International Journal of Thermal Sciences, 85 (2014):21-28, https://doi.org/10.1016/j.ijthermalsci.2014.06.014 . .