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    題名: Heat transfer modeling of conjugated Graetz problems in double-pass parallel-plate heat exchangers under asymmetric wall temperatures
    作者: Ho, Chii-dong;Yi-Chin Chen;Hsung Chang;Shung-Wen Kang
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: conjugated Graetz problems;asymmetric wall temperature;double-pass operation;performance improvement
    日期: 2012/01/16
    上傳時間: 2013-10-18 16:04:11 (UTC+8)
    出版者: Taylor & Francis Group
    摘要: The heat transfer of a Graetz problem is investigated theoretically. The problem involves an improvement to the design of a parallel-plate heat exchanger using an inserted plate which forms a double-pass device with recycle operation. The parallel plates are at different temperatures. The theoretical mathematical model is solved analytically using the separation of variables, superposition principle, and an orthogonal expansion technique in extended power series. Significant heat transfer improvement can be realized by the design compared to a single-pass device. The improvement is greater for a larger Graetz number system. For a small Graetz number system, the single-pass design is preferred. The optimal location of the inserted plate is when the two subchannels are at the same height.
    關聯: Journal of the Chinese Institute of Engineers=中國工程學刊 36(5), pp.647-657
    DOI: 10.1080/02533839.2012.734587
    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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