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A study on the intercepted insolation as a function of slope and azimuth of the surface

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  • Gopinathan, K.K.
  • Maliehe, N.B.
  • Mpholo, M.I.

Abstract

Monthly average daily global radiation on surfaces tilted towards the equator and also inclined at various azimuth angels are estimated for three locations in the Southern African region from reported global and diffuse radiation on a horizontal surface. The anisotropic model suggested by Hay is used in obtaining daily radiation at various slopes and orientations. Total annual radiation data are also computed for various tilt and azimuth angles and optimum tilt and azimuth angels corresponding to maximum insolation are obtained for winter, summer and annual collection. The optimum tilt and orientation reported here show some variation from those reported earlier by other investigators and the results are discussed.

Suggested Citation

  • Gopinathan, K.K. & Maliehe, N.B. & Mpholo, M.I., 2007. "A study on the intercepted insolation as a function of slope and azimuth of the surface," Energy, Elsevier, vol. 32(3), pages 213-220.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:3:p:213-220
    DOI: 10.1016/j.energy.2006.04.009
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    1. Gopinathan, K.K., 1991. "Modified daylength and the computation of global insolation," Energy, Elsevier, vol. 16(8), pages 1125-1130.
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    7. Mohammadi, Kasra & Mostafaeipour, Ali & Sabzpooshani, Majid, 2014. "Assessment of solar and wind energy potentials for three free economic and industrial zones of Iran," Energy, Elsevier, vol. 67(C), pages 117-128.
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