Assessing the distribution of solar irradiation in Mbarara, Uganda |
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Authors: | J Mubiru E J K B Banda T Otiti F D’Ujanga K Karume D Nyeinga D Okello D N Katongole |
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Institution: | (1) Department of Physics, Makerere University, Kampala, Uganda |
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Abstract: | Summary Existing literature lacks information on formulation and performance assessment of diffuse solar radiation models in the Eastern
African region yet this region has a high potential for the utilization of solar energy. The objective of this paper is to
assess the performance of seventeen diffuse solar irradiation empirical correlations, at Kampala, Uganda. The best performing
correlations were determined using the ranking method. The normalized absolute mean bias error and root mean square error
were computed and utilized in the ranking process. The results indicated that the correlations relating diffuse transmittance
with relative sunshine duration
are more reliable for diffuse solar radiation predictions at least in the Uganda environment. These models are expressed
in terms of first, second and third order polynomials of the relative sunshine duration and are particularly recommended for
their simplicity and worldwide applicability. |
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Keywords: | |
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