Optimum inclinations of south-facing solar collectors during the cooling season in China

Lin Wenxian

Energy, 1989, vol. 14, issue 11, 723-726

Abstract: Using Hay's anisotropic, diffuse-sky insolation model, we derive a theoretical equation which can be used to estimate the optimum slopes of tilted, south-facing surfaces during the cooling season in the northern hemisphere. The equation yields implicit results and it is difficult to obtain optimum slopes. The major factors affecting the optimum slopes are the latitude and direct-to-global insolation ratio. With data on solar radiation for 30 of China's major cities, a general correlation is developed by using the linear regression technique. The result is valid anywhere in China during the cooling season and is accurate (with a correlation coefficient r = 0.912 and a residual standard error s = 0.94) and convenient to use in practice.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:14:y:1989:i:11:p:723-726

DOI: 10.1016/0360-5442(89)90005-4

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