A graphical method of measuring the performance characteristics of solar collectors

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

Renewable Energy, 1996, vol. 7, issue 1, 23-31

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.

Date: 1996
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:7:y:1996:i:1:p:23-31

DOI: 10.1016/0960-1481(95)00119-0

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