The Influences of Recycle on a Double-Pass Laminar Counterflow Concentric-Tube Heat Exchangers with Sinusoidal Wall Fluxes

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题名:	The Influences of Recycle on a Double-Pass Laminar Counterflow Concentric-Tube Heat Exchangers with Sinusoidal Wall Fluxes
作者:	Chii-Dong Ho;Tsung-Lieh Hsien;Hsuan Chang;Jr-Wei Tu;Chih-Ming Yang
关键词:	Sinusoidal heat fluxes;Heat transfer;Recycle effect;Double-pass operation;Concentric heat exchanger
日期:	2009-07
上传时间:	2020-03-07 12:10:38 (UTC+8)
出版者:	Elsevier
摘要:	The effects of external recycle at the ends on double-pass laminar countercurrent heat exchangers with sinusoidal heat flux distribution are investigated analytically by setting a general solution to separate the original boundary value problem into a partial differential equation, which is solved by Frobenius method, and an ordinary differential equation. Analytical results show that recycle effects enhance the heat-transfer efficiency due to that the desirable effect of forced-convection increment has more influence than the undesirable effect of the heat-transfer driving-force decrement, and hence the forced-convection increment by increasing the recycle ratio leads to improved device performance in heat-transfer rate as compared with that in the single-pass operation (without an impermeable sheet inserted).
關聯:	International Communications in Heat and Mass Transfer 36(6), p.579-584
DOI:	10.1016/j.icheatmasstransfer.2009.03.012
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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