QQ客服 官方微博 反馈留言

	循环流化床锅炉炉内传热的影响因素
	李金晶 ; 李燕 ; 吕俊复 ; 岳光溪 ; LI Jinjing ; LI Yan ; LV Junfu ; YUE Guangxi
	2010-06-08 ; 2010-06-08
关键词	循环流化床 炉内传热 数值计算 辐射传热 circulating fluidized bed boiler heat transfer in furnace numerical analysis radiative heat transfer TK229.6
其他题名	Factors affecting the heat transfer in a circulating fluidized bed boiler
中文摘要	为定量分析受热面布置、床内流动、管内流动和床温等对循环流化床内传热和炉内辐射换热份额的影响,利用已有循环流化床炉内传热计算模型,比较了工程中常见工况下传热系数与设定标准工况下传热系数的偏差。结果显示:局部物料浓度是影响传热系数的最重要因素,相对偏差可达50%;流化风速、床温、工质温度或受热面金属导热系数影响下的传热系数相对偏差在5%~50%内变化;而烟气辐射厚度、管节距和管径的影响相对较小,传热系数相对偏差在5%以下;工质侧换热系数大于3 kW.m-2.K-1时,对传热系数的影响较小。工程上传热系数的辐射贡献通常约为60%。; 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穖-2稫-1.The results also show that radiation contributes 60% of the total heat transfer in a practical CFB boiler.; 国家“九七三”重点基础研究项目(G1999022204)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/50153]
专题	清华大学
推荐引用方式 GB/T 7714	李金晶,李燕,吕俊复,等. 循环流化床锅炉炉内传热的影响因素[J],2010, 2010.
APA	李金晶.,李燕.,吕俊复.,岳光溪.,LI Jinjing.,...&YUE Guangxi.(2010).循环流化床锅炉炉内传热的影响因素..
MLA	李金晶,et al."循环流化床锅炉炉内传热的影响因素".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。