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The influence of recycle on multi-pass laminar counterflow heaters or coolers

類別:期刊論文

學年 / 學期:90-2

出版日期:2002-07-01 00:00:00

著者:Ho, Chii-dong; Tsai, Yu-chuan

單位:淡江大學化學工程與材料工程學系

出版者:Taylor & Francis

著錄名稱、卷期、頁數:Chemical engineering communications 191(8), pp.1064-1082

摘要:A multi-pass laminar counterflow cooler or heater is an open duct divided into four subchannels with uniform wall temperature by inserting three impermeable sheets. Only the temperature of the flow stream varies along the subchannels. Improvements in heat transfer efficiency were investigated analytically with the use of eigenfunction expansions in the power series. The enhancement results in heat-transfer efficiency for two multi-pass devices (flow pattern A and flow pattern B) are represented graphically and compared with those in a single-pass device (without three impermeable sheets inserted) and those in a double-pass device (only one impermeable sheet inserted). Analytical results show that suitable impermeable-sheet position adjustments can effectively enhance heat transfer efficiencies for two multi-pass devices (flow pattern A and flow pattern B) compared with the efficiencies of single and double-pass devices.

關鍵字:Heat transfer;Multi-pass device;Conjugated Graetz problems

語言:en

ISSN:1563-5201

期刊性質:國外

審稿制度:

國別:GBR

出版型式:電子版