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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: 何啟東;Ho, Chii-dong;Hsien, Tsung-lieh;張煖;Chang, Hsuan;Tu, Jr-wei;Yang, Chih-ming
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: Sinusoidal heat fluxes;Heat transfer;Recycle effect;Double-pass operation;Concentric heat exchanger
    日期: 2009-07
    上传时间: 2010-08-09 18:18:58 (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), pp.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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