Double-flow heat transfer in a circular conduit by inserting a concentric tube for improved performance
學年 91
學期 1
出版（發表）日期 2003-01-01
作品名稱 Double-flow heat transfer in a circular conduit by inserting a concentric tube for improved performance
作品名稱（其他語言）
著者 Ho, Chii-dong; Yeh, Ho-ming; Yang, Wen-yi
單位 淡江大學化學工程與材料工程學系
出版者 Philadelphia: Taylor & Francis Inc.
著錄名稱、卷期、頁數 Chemical Engineering Communications 192(1-3), pp.237-255
摘要 A double-flow laminar counterflow heat exchanger device is an open circular tube divided into two subchannels with uniform wall temperature, inserted in parallel into an impermeable, resistless tube. Heat transfer performance was considerably improved, compared with an open circular tube (without an impermeable, resistless tube inserted), using an orthogonal expansion technique with eigenfunction power series expansion. The impermeable tube location can effectively enhance the heat transfer efficiency, leading to improved performance. The dimensionless outlet temperature and average Nusselt number decrease with increasing Graetz number (Gz) as the subchannel thickness ratio (κ) moves awayfrom 0.5, especiallyfor κ > 0.5, for flow pattern A. Heat transfer rate improvement occursforflow pattern B for any Graetz number with κ < 0. 6. The power consumption increment is also delineated.
關鍵字 Concentric tubes;Double-flow operations;Heat transfer
語言 en
ISSN 0098-6445
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Yang, Wen-yi
審稿制度
國別 USA
公開徵稿
出版型式 紙本
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