淡江大學機構典藏:Item 987654321/108050
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/108050


    Title: Mass Transfer Enhancement in Double-Pass Parallel-Plate Mass Exchangers under Asymmetric Wall Fluxes
    Authors: Ho, Chii-dong
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: Asymmetric wall fluxes;Conjugated Graetz problems;Double-pass operation;Mass transfer;Performance improvement
    Date: 2009-09-25
    Issue Date: 2016-10-22 02:11:36 (UTC+8)
    Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
    Abstract: A device involving mass exchangers with a permeable membrane inserted to divide the open duct into two subchannels for conducting double-pass laminar countercurrent operations under asymmetric wall mass fluxes, which results in a substantial improvement of the mass transfer, has been developed and investigated theoretically. The resultant partial differential equations for such a double-pass forced-convection mass transfer problem are referred to as conjugated Graetz problems and solved analytically in this work by using an eigenfunction expansion in terms of power series for the homogeneous part and an asymptotic solution for the inhomogeneous part. The theoretical predictions of mass transfer efficiency improvement in double-pass, parallel-plate mass exchangers are obtained by suitably adjusting the permeable membrane location. They are represented graphically and compared with the results from an open duct of a single-pass operation (without a permeable membrane inserted). The increment of power consumption is also discussed.
    Relation: Chemical Engineering & Technology 32(10),　p.1567-1577
    DOI: 10.1002/ceat.200900121
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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