The influences of recycle on a double-pass laminar counterflow concentric circular heat exchangers
學年 91
學期 2
出版（發表）日期 2003-06-01
作品名稱 The influences of recycle on a double-pass laminar counterflow concentric circular heat exchangers
作品名稱（其他語言）
著者 Ho, Chii-dong; Yang, Wen-yi
單位 淡江大學化學工程與材料工程學系
出版者 Elsevier
著錄名稱、卷期、頁數 International journal of heat and mass transfer 46(12), pp.2103-2113
摘要 .A new device of inserting an impermeable sheet with negligible thermal resistance to divide a circular tube into two subchannels with uniform wall temperature and external refluxes at the ends, resulting in substantially improving the heat transfer, has been designed. The mathematical formulation and theoretical analysis to such a conjugated Graetz problem of double-pass concentric circular heat exchangers have been developed by the use of an orthogonal expansion technique. The analytical results are represented graphically and compared with that in an open conduit of the same size without recycle. Considerable improvement in heat transfer is obtainable by employing double-pass operations with inserting an impermeable sheet instead of using single-pass operations without external refluxes. Two numerical examples in heat transfer efficiency by arranging the recycle effect as well as the power consumption were illustrated. The effects of the channel thickness ratio on the enhancement of heat transfer efficiency as well as on the power consumption increment have been also discussed.
關鍵字 Heat exchangers;Double-pass operations;Concentric circular tubes;Recycle
語言 en
ISSN 1879-2189 0017-9310
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 Ho, Chii-dong
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
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