| 循环流化床颗粒团更新模型与局部换热系数 |
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| 引用本文： | 赫俏,陆继东,钱诗智,林志杰.循环流化床颗粒团更新模型与局部换热系数[J].华中科技大学学报(自然科学版),1997(10). |
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| 作者姓名： | 赫俏 陆继东 钱诗智 林志杰 |
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| 作者单位： | 华中理工大学煤燃烧国家重点实验室 |
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| 基金项目： | 国家教委“跨世纪优秀人材计划”资助项目 |
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| 摘 要： | 从循环流化床换热机理的研究出发，提出了一种能够综合描述换热特性并求解床壁间局部换热系数的模型．基于简化的颗粒团更新概念，沿床高分段求出各个位置颗粒团的平均滞留时间，对应于各处局部换热系数．
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| 关 键 词： | 循环流化床 颗粒团更新 换热系数 |
Local Heat Transfer Coefficient Model Built on Concept of Cluster Renewal in Circulating Fluidized Beds |
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| He Qiao National Lab. of Coal Combustion,HUST,Wuhan ,China. Lu Jidong Qian Shizhi Lin Zhijie.Local Heat Transfer Coefficient Model Built on Concept of Cluster Renewal in Circulating Fluidized Beds[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1997(10). |
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| Authors: | He Qiao National Lab of Coal Combustion HUST Wuhan China Lu Jidong Qian Shizhi Lin Zhijie |
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| Institution: | He Qiao National Lab. of Coal Combustion,HUST,Wuhan 430074,China. Lu Jidong Qian Shizhi Lin Zhijie |
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| Abstract: | A model describing the local bed to wall heat transfer coefficient in circulating fluidized beds is developed by using the concept of renewal cluster. It is assumed that the complete wall comes into contact alternately with the cluster and the dispersed phase. An attempt to estimate the residence time of cluster at different locations of the wall is made by dividing the bed into a series of sections along the bed height. The residence time of the cluster and the wall fraction covered by cluster have been used to estimate the local heat transfer coefficient. |
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| Keywords: | circulating fluidized bed cluster renewal heat transfer coefficient |
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