平行流分隔板管壳式换热器壳侧流场与传热性能  

FLOW AND HEAT TRANSFER CHARACTERISTICS IN SHELL SIDE OF SHELL-AND-TUBE HEAT EXCHANGERS WITH SEPARATED BAFFLES PARALLEL TO SEGMENTAL BAFFLES

作　　者：王杨君[1] 邓先和[1] 陈颖[1] 李志武[1] 

机构地区：[1]华南理工大学教育部传热强化与过程节能重点实验室,广东广州510640

出　　处：《化工学报》2004年第2期275-279,共5页CIESC Journal

基　　金：国家重点基础研究项目 (No G2 0 0 0 0 2 63 0 1);教育部重点项目 (No 0 0 10 3 );广东省重点科技攻关项目(No C12 2 0 3 )~~

摘　　要：A shell-and-tube heat exchanger with separated baffles parallel to segmental baffles was proposed, and an investigation on velocity distribution, heat transfer and flow resistance characteristics in the shell side of the proposed heat exchanger and traditional single segmental baffled shell-and-tube heat exchanger was reported. After the experiment, the empirical relations of heat transfer and flow resistance were obtained. The heat transfer enhancement comprehensive evaluation factor η was in the range from 1.15 to 1.20 for Reynolds number (1.25×10 4—3.35×10 4). The results indicated that flow field uniformization was enhanced in the shell side of shell-and-tube heat exchangers by two separated baffles parallel to segmental baffles and the performance of heat transfer was improved by controlling the dimension of vortices. The results could be used as reference in further research.A shell-and-tube heat exchanger with separated baffles parallel to segmental baffles was proposed, and an investigation on velocity distribution, heat transfer and flow resistance characteristics in the shell side of the proposed heat exchanger and traditional single segmental baffled shell-and-tube heat exchanger was reported. After the experiment, the empirical relations of heat transfer and flow resistance were obtained. The heat transfer enhancement comprehensive evaluation factor η was in the range from 1.15 to 1.20 for Reynolds number (1.25×10 4—3.35×10 4). The results indicated that flow field uniformization was enhanced in the shell side of shell-and-tube heat exchangers by two separated baffles parallel to segmental baffles and the performance of heat transfer was improved by controlling the dimension of vortices. The results could be used as reference in further research.

关 键 词：管壳式换热器 强化传热 平行流分隔板 流速分布 

分 类 号：TK121[动力工程及工程热物理—工程热物理]