出版日期：2005-02-01 00:00:00

著者：Ho, Chii-dong; 葉和明; 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：Taylor & Francis

著錄名稱、卷期、頁數：Chemical engineering communications 192(2), 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 away from 0.5, especially for κ > 0.5, for flow pattern A. Heat transfer rate improvement occurs for flow 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

審稿制度：否

國別：GBR

出版型式：電子版