Recycle Effect on Heat Transfer Enhancement in Double-Pass Heat Exchangers under Asymmetric Isotherm Conditions

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 987654321/110082

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题名:	Recycle Effect on Heat Transfer Enhancement in Double-Pass Heat Exchangers under Asymmetric Isotherm Conditions
作者:	Ho, Chii-Dong;Chen, Yi-Chin;Lin, Li-Pang
关键词:	Asymmetric isotherm conditions;Conjugated Graetz problems;Heat transfer;Performance improvement;External recycle
日期:	2015-10-17
上传时间:	2017-03-23 02:10:49 (UTC+8)
摘要:	The mathematical formulation of a heat transfer flow problem in the recycling parallel-plate heat exchanger under asymmetric wall temperatures was developed theoretically with ignoring axial conduction, and the analytical solution was obtained using a superposition principle and an orthogonal expansion technique in extended power series. The influences of the design parameters of the impermeable-sheet position (∆), and the operating parameters of the Graetz number (Gz), wall temperature ratio (σ) and recycle ratio (R) are examined. Significant heat transfer improvement is obtainable by employing double-pass devices instead of using single-pass ones for a larger Graetz number system. 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 wall temperature ratios.
關聯:	International Communication in Heat and Mass Transfer 67, pp.109-113
DOI:	10.1016/j.icheatmasstransfer.2015.07.011
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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