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    题名: Collector efficiency in downward-type internal-recycle solar air heaters with attached fins
    作者: Yeh, Ho-Ming;Ho, Chii-Dong
    关键词: collector efficiency;solar air heater;downward type;fins attached;flat plate;internal recycle
    日期: 2013-10-01
    上传时间: 2016-10-22 02:11:28 (UTC+8)
    出版者: M D P I AG
    摘要: The internal-recycle operation effect on collector efficiency in downward-type rectangular solar air heaters with attached fins is theoretically investigated. It is found that considerable collector efficiency is obtainable if the collector has attached fins and the operation is carried out with internal recycling. The recycling operation increases the fluid velocity to decrease the heat transfer resistance, compensating for the undesirable effect of decreasing the heat transfer driving force (temperature difference) due to remixing. The attached fins provide an enlarged heat transfer area. The order of performance in a device of same size is: double pass with recycle and fins > double pass with recycle but without fins > single pass without recycle and fins.
    關聯: Energies 6(10), pp.5130-5144
    DOI: 10.3390/en6105130
    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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