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Characteristics of the monthly averaged hourly diffuse irradiance at Lagos and Zaria, Nigeria

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  • Maduekwe, A.A.L.
  • Garba, B.

Abstract

An extensive study of characteristics of the monthly averaged hourly diffuse radiation has been carried out for the southern and coastal city of Lagos, latitude 6.58°N, and at Zaria, latitude 11.10°N, a northern city situated in the savannah belt. Correlations have been established for the prediction of the monthly averaged hourly diffuse fraction of the total irradiance reaching these locations. The inclusion of the solar elevation as an explanatory variable in the usual K-Kt correlation improved the correlation for Zaria using the root mean square error as a measure by 31.6%, while the correlation for Lagos was not improved by the inclusion of the solar elevation as a predictor. Comparison with five models from higher latitudes indicate that their use for the prediction of the diffuse solar irradiance at Nigerian locations will not give correct results. © 1999 Elsevier Science Ltd. All rights reserved.

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  • Maduekwe, A.A.L. & Garba, B., 1999. "Characteristics of the monthly averaged hourly diffuse irradiance at Lagos and Zaria, Nigeria," Renewable Energy, Elsevier, vol. 17(2), pages 213-225.
    • Handle: RePEc:eee:renene:v:17:y:1999:i:2:p:213-225
    DOI: 10.1016/S0960-1481(98)00034-2
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    References listed on IDEAS

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    1. Chendo, M.A.C. & Maduekwe, A.A.L., 1994. "Hourly distributions of global and diffuse solar radiation in Lagos, Nigeria," Renewable Energy, Elsevier, vol. 4(1), pages 101-108.
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    Cited by:

    1. Giwa, Adewale & Alabi, Adetunji & Yusuf, Ahmed & Olukan, Tuza, 2017. "A comprehensive review on biomass and solar energy for sustainable energy generation in Nigeria," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 620-641.
    2. Sachdev, Hira Singh & Akella, Ashok Kumar & Kumar, Niranjan, 2015. "Analysis and evaluation of small hydropower plants: A bibliographical survey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1013-1022.
    3. Otunla, T.A., 2019. "Estimates of clear-sky solar irradiances over Nigeria," Renewable Energy, Elsevier, vol. 131(C), pages 778-787.

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