Performance of Sayigh's universal formula for the estimation of global solar radiation in Ghana

The performance of Sayigh's universal formula for the estimation of global solar radiation is tested against that of Angstrom-Black model for 13 stations in Ghana, using monthly mean daily global solar radiation averaged over the years 1957–1981. Sayigh's model is found not to perform as c...

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Bibliographic Details
Published inRenewable energy Vol. 10; no. 1; pp. 91 - 106
Main Author Oduro-Afriyie, K.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1997
Elsevier Science
Subjects
Applied sciences
Energy
Exact sciences and technology
Natural energy
Solar energy
Solar radiation
Ghana
Africa
Global radiation
Solar radiation
Modeling
Comparative study
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Summary:The performance of Sayigh's universal formula for the estimation of global solar radiation is tested against that of Angstrom-Black model for 13 stations in Ghana, using monthly mean daily global solar radiation averaged over the years 1957–1981. Sayigh's model is found not to perform as creditably as the Angstrom-Black model in the estimation of monthly global solar radiation in Ghana. Of the 156 values of monthly global solar radiation estimated by Sayigh's model, 123 (or 78.8%) had discrepancies of more than 10% with the measured values. The corresponding value for the Angstrom-Black model was 7 (or 4.5%).
ISSN:0960-1481
1879-0682
DOI:10.1016/0960-1481(95)00136-0