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A graphical method of measuring the performance characteristics of solar collectors

Author

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  • Nijegorodov, N.
  • Jain, P.K.
  • Devan, K.R.S.

Abstract

A graphical method to measure average and instantaneous efficiencies of a solar concentrator used for heating and boiling liquids and a flat plate collector is presented. The overall heat loss coefficient for the collectors and the optical loss factors: ϱγ(τa)b—the product for a concentrator and (τa)—the product for a flat plate collector, are also obtained. The method involves measuring the temperature of stagnated liquid in the absorber/collector as a function of time at noon. The efficiencies obtained are correct to within 5% of the efficiencies obtained from accurate measurements involving solar radiation data, the design parameters of collectors and the physical characteristics of the materials used in the fabrication of collectors.

Suggested Citation

  • Nijegorodov, N. & Jain, P.K. & Devan, K.R.S., 1996. "A graphical method of measuring the performance characteristics of solar collectors," Renewable Energy, Elsevier, vol. 7(1), pages 23-31.
    • Handle: RePEc:eee:renene:v:7:y:1996:i:1:p:23-31
    DOI: 10.1016/0960-1481(95)00119-0
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    References listed on IDEAS

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    1. Nijegorodov, N. & Jain, P.K. & Devan, K.R.S., 1994. "A graphical method to estimate the efficiency of a solar concentrator," Renewable Energy, Elsevier, vol. 5(1), pages 373-375.
    2. Nijegorodov, N. & Jain, P.K. & Devan, K.R.S., 1995. "A non-tracking, cylindrical solar concentrator with circular cross-section: Theoretical and experimental analysis," Renewable Energy, Elsevier, vol. 6(1), pages 1-9.
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