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    題名: Experimental and theoretical studies of recyclic flat-plate solar water heaters equipped with rectangle conduits
    作者: Ho, Chii-Dong;Chen, Tsung-Ching;Tsai, Cheng-Jung
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Solar water heater;Recycle operation;Rectangle conduits;Aspect ratio;Energy consumption
    日期: 2010-10
    上傳時間: 2011-10-13 22:32:37 (UTC+8)
    摘要: A recycle operation design using a flat-plate solar water heater with rectangle flow conduits was theoretically and experimentally investigated. Devices with differing flow-conduit geometries (i.e. aspect ratio) and external recycle were designed to create a solar heater with low heat-transfer resistance between the absorber and working fluid to increase the convective heat-transfer coefficient. Considerable solar water heater collector efficiency improvement has been obtained employing rectangle flow conduits and a recycle operation, instead of recycle solar collector constructed with circular pipes operated at the same total mass flow rate. Under a fixed absorber area and distance between the flow conduits, the collector efficiency increases with increasing flow conduit aspect ratio, total mass flow rate and recycle ratio but with decreasing inlet water temperature. The incident solar radiation, mass flow rate, recycle ratio and flow conduit aspect ratio influences on the collector efficiency and energy consumption are also discussed.
    關聯: Renewable Energy 35(10), pp.2279–2287
    DOI: 10.1016/j.renene.2010.03.026
    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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