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Efficiency of Recycling Double-Pass V-Corrugated Solar Air Collectors

Author

Listed:
  • Chii-Dong Ho

    (Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251, Taiwan)

  • Ching-Fang Hsiao

    (Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251, Taiwan)

  • Hsuan Chang

    (Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251, Taiwan)

  • Yi-En Tien

    (Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251, Taiwan)

  • Zih-Syuan Hong

    (Energy and Opto-Electronic Materials Research Center, Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251, Taiwan)

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.

Suggested Citation

  • Chii-Dong Ho & Ching-Fang Hsiao & Hsuan Chang & Yi-En Tien & Zih-Syuan Hong, 2017. "Efficiency of Recycling Double-Pass V-Corrugated Solar Air Collectors," Energies, MDPI, vol. 10(7), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:875-:d:103058
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    References listed on IDEAS

    as
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