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    题名: Device Performance Improvement of Double-Pass Concentric Circular Mass Exchangers under Uniform Wall Fluxes
    作者: Ho, Chii-dong;Chuang, Yu-chuan;Tu, Jr-wei
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: Flow pattern;Mass transfer;Modeling;Tubes
    日期: 2007-04-01
    上传时间: 2010-08-09 18:21:28 (UTC+8)
    出版者: Wiley - V C H Verlag GmbH & Co. KGaA
    摘要: A double-pass concentric circular mass exchanger under uniform wall fluxes is produced by inserting a permeable barrier into a circular tube to improve the device performance. The mathematical formulation was developed theoretically for such double-pass, forced-convection, mass-transfer problems which are referred to as conjugated Graetz problems. The analytical solutions are obtained by the linear superposition of an asymptotic solution and a homogeneous solution which are linear in the axial direction and solved with the use of an eigenfunction expansion in a power series. The analytical results show that the mass-transfer rate of a double-pass mass exchanger can be improved compared to that of a single-pass mass exchanger by suitably adjusting the permeable barrier position. Moreover, the ratio of mass-transfer efficiency improvement and power consumption increment is also shown to make good economic sense.
    關聯: Chemical Engineering and Technology 30(4), pp.431-442
    DOI: 10.1002/ceat.200600370
    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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