DocumentCode :
507861
Title :
A Study on Heat Transfer Model in Sparse Zone of Oxy-Fuel Fired CFB
Author :
Wang, Chunbo ; Hou, Weijun ; Zhang, Wei ; Lu, Guang ; Huo, Zhihong ; Zhang, Jiao
Author_Institution :
Sch. of Energy & Power Eng., North China Electr. Power Univ., Baoding, China
Volume :
1
fYear :
2009
fDate :
16-18 Oct. 2009
Firstpage :
515
Lastpage :
518
Abstract :
A model has been developed to calculate the coefficient heat transfer in sparse zone of oxy-fuel fired circulating fluidized bed boiler (CFBB). The model shows that the convective heat transfer coefficient is enhanced with increase in CO2 density, bed temperature, and decrease in particle diameter; and, the radiative heat transfer coefficient is enhanced with increase in bed temperature and CO2 density. It was be found that temperature has important influence on both radiative and convective heat transfer. The CO2 density is very important in enhancing the radiative heat transfer. For example, the total heat transfer could be 264.0 w/(m2·k) when the CO2 density is 80% when flue gas at 1273 K.
Keywords :
boilers; convection; fluidised beds; radiative transfer; CO2; circulating fluidized bed boiler; convective heat transfer coefficient; oxy-fuel fired CFB; radiative heat transfer coefficient; sparse zone; temperature 1273 K; Boilers; Combustion; Flue gases; Fluidization; Heat engines; Heat transfer; Power engineering; Temperature; Testing; Water heating;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
Type :
conf
DOI :
10.1109/ICEET.2009.130
Filename :
5363580
Link To Document :
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