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Comprehensive study of solar conditions in Mozambique: the effect of trade winds on solar components

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  • Nijegorodov, N.I.
  • Devan, K.R.S.
  • Simao, H.
  • Mabbs, R.

Abstract

A new algorithm to simulate all solar components and optimum slopes, βopt, based on new models for direct normal beam and diffuse radiation and an analytical model to predict βopt, developed at the University of Botswana is applied for complete study of solar conditions in Mozambique. The components of solar radiation depend to a large extent on the number of h of sunshine. However, it is obvious that cloud-cover is determined mainly by the prevailing trade winds, which carry moisture and rain clouds. This is of especial concern in coastal areas. In the current work, hourly, I, daily, H and monthly mean, H̄ components of solar radiation and the optimum slopes of a north–south aligned collector are simulated and analyzed for 21 synoptic stations in Mozambique. Monthly mean daily direct normal, H̄bn solar radiation maps are plotted for December and June and discussed. It is found that, to a great extent, isoinsolation curves are determined by the prevailing trade winds, mountain chains and coastal conditions. Plotted maps of annual mean daily direct normal and global solar radiation also show tremendous dependence on the prevailing winds. Several special locations in Mozambique with quite high or very low solar radiation components are pointed out and the reasons explained.

Suggested Citation

  • Nijegorodov, N.I. & Devan, K.R.S. & Simao, H. & Mabbs, R., 2003. "Comprehensive study of solar conditions in Mozambique: the effect of trade winds on solar components," Renewable Energy, Elsevier, vol. 28(12), pages 1965-1983.
    • Handle: RePEc:eee:renene:v:28:y:2003:i:12:p:1965-1983
    DOI: 10.1016/S0960-1481(03)00038-7
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    References listed on IDEAS

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    1. Nijegorodov, N. & Devan, K.R.S. & Jain, P.K. & Carlsson, S., 1994. "Atmospheric transmittance models and an analytical method to predict the optimum slope of an absorber plate, variously oriented at any latitude," Renewable Energy, Elsevier, vol. 4(5), pages 529-543.
    2. Nijegorodov, N. & Adedoyin, J.A. & Devan, K.R.S., 1997. "A new analytical-empirical model for the instantaneous diffuse radiation and experimental investigation of its validity," Renewable Energy, Elsevier, vol. 11(3), pages 341-350.
    3. Nijegorodov, N. & Luhanga, P.V.C., 1996. "Air mass: Analytical and empirical treatment; an improved formula for air mass," Renewable Energy, Elsevier, vol. 7(1), pages 57-65.
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    1. Rensheng, Chen & Ersi, Kang & Jianping, Yang & Shihua, Lu & Wenzhi, Zhao & Yongjian, Ding, 2004. "Estimation of horizontal diffuse solar radiation with measured daily data in China," Renewable Energy, Elsevier, vol. 29(5), pages 717-726.
    2. Cuvilas, C.A. & Jirjis, R. & Lucas, C., 2010. "Energy situation in Mozambique: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 2139-2146, September.

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