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

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  • Lin, Wenxian

Abstract

Based on Hay's anisotropic, diffuse-sky insolation model, theoretical equations are derived, which can be used to estimate the optimum slopes of tilted, south-facing surfaces during the heating season in the northern hemisphere. The effects of latitude, declination, ground reflectivity, concentration ratio, direct-to-global insolation ratio, and clearness index on optimum slopes are discussed and analyzed. The optimum slopes depend mainly on latitude, declination, direct-to-global insolation ratio and the general correlations for estimating optimum slopes of tilted, south-facing surfaces during the heating season in China are obtained from data of solar insolation measured in major cities. The linear regression technique is used. The general correlations developed are valid anywhere in China and are accurate (with a maximum residual standard error of s = 1.05) and convenient to use in practice.

Suggested Citation

  • Lin, Wenxian, 1989. "Optimum inclinations of south-facing solar collectors during the heating season in China," Energy, Elsevier, vol. 14(3), pages 123-129.
    • Handle: RePEc:eee:energy:v:14:y:1989:i:3:p:123-129
    DOI: 10.1016/0360-5442(89)90055-8
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    Cited by:

    1. Tang, Runsheng & Wu, Tong, 2004. "Optimal tilt-angles for solar collectors used in China," Applied Energy, Elsevier, vol. 79(3), pages 239-248, November.

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