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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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    Cited by:

    1. Mohammadi, Kasra & Khorasanizadeh, Hossein, 2015. "A review of solar radiation on vertically mounted solar surfaces and proper azimuth angles in six Iranian major cities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 504-518.
    2. Francesco Pasanisi & Gaia Righini & Massimo D’Isidoro & Lina Vitali & Gino Briganti & Sergio Grauso & Lorenzo Moretti & Carlo Tebano & Gabriele Zanini & Mabafokeng Mahahabisa & Mosuoe Letuma & Muso Ra, 2021. "A Cooperation Project in Lesotho: Renewable Energy Potential Maps Embedded in a WebGIS Tool," Sustainability, MDPI, vol. 13(18), pages 1-26, September.
    3. 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.
    4. Mpholo, Moeketsi & Nchaba, Teboho & Monese, Molebatsi, 2015. "Yield and performance analysis of the first grid-connected solar farm at Moshoeshoe I International Airport, Lesotho," Renewable Energy, Elsevier, vol. 81(C), pages 845-852.
    5. Hong, Taehoon & Koo, Choongwan & Park, Joonho & Park, Hyo Seon, 2014. "A GIS (geographic information system)-based optimization model for estimating the electricity generation of the rooftop PV (photovoltaic) system," Energy, Elsevier, vol. 65(C), pages 190-199.
    6. D’Isidoro, Massimo & Briganti, Gino & Vitali, Lina & Righini, Gaia & Adani, Mario & Guarnieri, Guido & Moretti, Lorenzo & Raliselo, Muso & Mahahabisa, Mabafokeng & Ciancarella, Luisella & Zanini, Gabr, 2020. "Estimation of solar and wind energy resources over Lesotho and their complementarity by means of WRF yearly simulation at high resolution," Renewable Energy, Elsevier, vol. 158(C), pages 114-129.
    7. Zhong, Hao & Li, Guihua & Tang, Runsheng & Dong, Wenli, 2011. "Optical performance of inclined south–north axis three-positions tracked solar panels," Energy, Elsevier, vol. 36(2), pages 1171-1179.
    8. Ma, Yi & Li, Guihua & Tang, Runsheng, 2011. "Optical performance of vertical axis three azimuth angles tracked solar panels," Applied Energy, Elsevier, vol. 88(5), pages 1784-1791, May.

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