期刊論文

標題 Recycle effect on heat transfer enhancement in double-pass parallel-plate heat exchangers under asymmetric wall fluxes
學年 98
學期 2
出版(發表)日期 2010/03/01
作品名稱 Recycle effect on heat transfer enhancement in double-pass parallel-plate heat exchangers under asymmetric wall fluxes
作品名稱(其他語言)
著者 Ho, Chii-Dong; Tu, Jr-Wei; Wang, Gow-Bin; Lai, Wei-Chi; Chen, Wei-Zum
單位 淡江大學化學工程與材料工程學系
出版者 Kidlington: Pergamon
著錄名稱、卷期、頁數 International Communications in Heat and Mass Transfer 37(3), pp.274-280
摘要 A new design of conjugated heat transfer in double-pass parallel-plate laminar countercurrent operations subjected to asymmetric wall heat fluxes has been investigated theoretically, and the analytical results obtained with superposition model which introduces the an eigenfunction expansion in terms of power series for the homogeneous part and an asymptotic solution for the inhomogeneous part. The influences of the design parameters, the impermeable-sheet position (Δ), and the operating parameters, the mass-transfer Graetz number (Gz), wall heat flux ratio (Qr) and recycle ratio (R), are examined. The results are represented graphically and compared with those in a single-pass parallel-plate heat exchanger (without inserting an impermeable sheet). Considerable improvement in heat transfer is obtainable by employing such a recyclic double-pass device, instead of using the single-pass one. A technical feasibility of the new double-pass device was investigated in terms of the Nusselt number and device performance improvement under the effect of variable ratio of heat fluxes on both sides. It concluded that a substantial heat-transfer efficiency improvement is achieved by employing such a recyclic device with suitable elections of impermeable-sheet position and recycle ratio.
關鍵字 Heat transfer;Recycle effect;Asymmetric wall flux;Double-pass operation
語言 英文
ISSN 0735-1933;1879-0178
期刊性質 國外
收錄於 SCI;
產學合作
通訊作者 Ho, Chii-Dong
審稿制度
國別 英國
公開徵稿
出版型式 ,電子版,紙本