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	Factors affecting the heat transfer in a circulating fluidized bed boiler
	Li Jinjing ; Li Yan ; Lu Junfu ; Yue Guangxi
	2010-05-11 ; 2010-05-11
关键词	Practical/ boilers convection fluidised beds furnaces/ fluidized bed boiler furnace thermal conductivity flue gas convective heat transfer/ A4785 Applied fluid mechanics A4725Q Convection and heat transfer A4755M Flow through porous media E2120 Heat and thermodynamic processes (mechanical engineering) E1560 Production equipment E2130 Fluid mechanics and aerodynamics (mechanical engineering)
中文摘要	The relative variations of the heat transfer coefficients for various operating conditions were calculated for a circulating fluidized bed (CFB) boiler to quantitatively analyze the effects of the geometry and physical properties of the heated surface, the hydrodynamics in the bed and inside the tube, and the bed temperature on the heat transfer in the CFB boiler furnace and the radiation heat transfer. The results show that the local solid suspension concentration most strongly influences the heat transfer coefficients, with relative deviations more than 50%. The relative deviations of the heat transfer coefficients range from 5% to 50% for various bed gas velocities, bed temperatures, water or steam temperatures inside the tube, and thermal conductivity of the heated surface. The relative deviations are less than 5% for various flue gas radiation thicknesses, tube pitches, and tube diameters, which can be neglected. The effect of the convective heat transfer inside the tube on the heat transfer in the CFB boiler furnace is important if the convective heat transfer coefficient is less than 3 kW ldr m/sup -2/ ldr K/sup -1/. The results also show that radiation contributes 60% of the total heat transfer in a practical CFB boiler.
语种	中文 ; 中文
出版者	Tsinghua University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/25751]
专题	清华大学
推荐引用方式 GB/T 7714	Li Jinjing,Li Yan,Lu Junfu,et al. Factors affecting the heat transfer in a circulating fluidized bed boiler[J],2010, 2010.
APA	Li Jinjing,Li Yan,Lu Junfu,&Yue Guangxi.(2010).Factors affecting the heat transfer in a circulating fluidized bed boiler..
MLA	Li Jinjing,et al."Factors affecting the heat transfer in a circulating fluidized bed boiler".(2010).

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