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    題名: An analytical study of power-law fluids in double-pass heat exchangers with external recycle
    作者: Lin, Gwo-Geng;Ho, Chii-Dong;Huang, Jung-Jeng;Chen, Yi-Chin
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Power-law fluids;Nusselt number;Uniform wall temperature;Double-pass operation;Heat transfer efficiency;Recycle
    日期: 2012/04/01
    上傳時間: 2012-03-15 17:07:59 (UTC+8)
    出版者: Kidlington: Pergamon
    摘要: The influence of the recycle effect on heat transfer to the power-law fluids from a double-pass parallel-plate heat exchanger with uniform wall temperature has been studied analytically. The governing equations are solved by an orthogonal expansion technique in terms of power series. The heat transfer problem is solved for fully developed laminar flow through parallel-plate channels by ignoring axial conduction, with fluid properties of temperature independence. The dependence of the average Nusselt number on the Graetz number has been studied in detail. Analytical results show that the recycle effect can enhance the heat transfer efficiency as compared with that in a single pass (without an impermeable plate inserted and without recycle). Considerable heat-transfer enhancement is obtained by introducing the recycle-effect concept in designing such double-pass operations. The effects of the impermeable-sheet position and the power-law index on the enhancement of device performance as well as the power consumption increment have also been delineated.
    關聯: International Journal of Heat and Mass Transfer 55(9-10), pp.2261–2267
    DOI: 10.1016/j.ijheatmasstransfer.2012.01.039
    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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