淡江大學機構典藏:Item 987654321/112409
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/112409


    Title: Efficiency of recycling double-pass V-corrugated solar air collectors
    Authors: Chii-Dong Ho;Ching-Fang Hsiao;Hsuan Chang;Yi-En Tien;Zih-Syuan Hong
    Keywords: solar air heater;V-corrugated absorber;recycle effect;heat-transfer efficiency
    Date: 2017-06-29
    Issue Date: 2017-12-13 02:11:24 (UTC+8)
    Abstract: The influence of recycling on double-pass solar air collectors with welding of the
    V-corrugated absorber has been studied experimentally and theoretically. Welding the V-corrugated
    absorber and the recycle-effect concept to the solar air collector was proposed to strengthen the
    convective heat-transfer coefficient due to turbulence promotion. Both the recycle effect and the
    V-corrugated absorber can effectively enhance the heat transfer efficiency compared to various designs
    such as single-pass, flat-plate double-pass, and double-pass wire mesh packed devices. Recycling
    operations and welding the V-corrugated absorber could enhance the collector efficiency by increasing
    the recycle ratio, incident solar radiations, and air mass flow rates. The most efficient and economical
    operating conditions were found at R ≈ 0.5, with relatively small hydraulic dissipated energy
    compensation. It was found that the turbulence intensity increase from welding the V-corrugated
    absorber into the solar air collector channel could compensate for the power consumption increase,
    when considering economic feasibility.
    Relation: Energies 10(7), p.875-889
    DOI: 10.3390/en10070875
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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