Conjugated heat transfer in double-pass laminar counterflow concentric-tube heat exchangers with sinusoidal wall fluxes

doi:10.1016/j.ijheatmasstransfer.2008.05.036

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/65515

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題名:	Conjugated heat transfer in double-pass laminar counterflow concentric-tube heat exchangers with sinusoidal wall fluxes
作者:	Ho, Chii-Dong;Tu, Jr-Wei;Yang, Chih-Ming
貢獻者:	淡江大學化學工程與材料工程學系
關鍵詞:	Sinusoidal heat fluxes;Conjugated Graetz problems;Double-pass operation;Concentric circular heat exchanger
日期:	2009-01-15
上傳時間:	2011-10-21 16:32:33 (UTC+8)
出版者:	Kidlington: Pergamon
摘要:	An analytical method is proposed to predict the temperature distribution and local Nusselt number for laminar flow in a double-pass countercurrent heat exchanger with sinusoidal heat flux distribution. A design of inserting in parallel an impermeable barrier to divide an open conduit into two subchannels for conducting double-pass operations, resulting in substantially improved the heat transfer rate, has been evaluated theoretically in the fully developed region. Comparison with the theoretical results shows that the heat-transfer efficiency improvement for double-pass concentric circular heat exchangers is generally higher than those in the single-pass operations without an impermeable barrier inserted. The influences of the impermeable-barrier location on the heat-transfer efficiency improvement and power consumption increment, as indicated from theoretical predictions, can be used to determine the economical feasibility in operating double-pass devices.
關聯:	International Journal of Heat and Mass Transfer 52(1-2), pp.45-55
DOI:	10.1016/j.ijheatmasstransfer.2008.05.036
顯示於類別:	[化學工程與材料工程學系暨研究所] 期刊論文

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