Estimation of solar radiation from the number of sunshine hours

Several expressions have been used to estimate global solar radiation from sunshine hours for weather stations in Oman, an arid region. These included original (linear) and modified (linear–logarithmic) Angström–Black type regression functions, a quadratic function, a power relationship, a power–tri...

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Bibliographic Details
Published inApplied energy Vol. 63; no. 3; pp. 161 - 167
Main Authors Ampratwum, David B., Dorvlo, Atsu S.S.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1999
Elsevier Science
Elsevier
SeriesApplied Energy
Subjects
Applied sciences
Arid regions
Energy
Exact sciences and technology
Functions
Mathematical models
Natural energy
Regression analysis
Solar energy
Solar radiation
Asia
Oman
Correlation
Global radiation
Sunshine duration
Solar radiation
Data gathering
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Summary:Several expressions have been used to estimate global solar radiation from sunshine hours for weather stations in Oman, an arid region. These included original (linear) and modified (linear–logarithmic) Angström–Black type regression functions, a quadratic function, a power relationship, a power–trigonometric equation and one from a new Angström–Black type logarithmic model. For the power–trigonometric model, the solar altitude of the station was used as additional information for estimating the solar radiation. All the models performed well as estimators of global solar-radiation from sunshine hours but the non-linear models were better than the basic linear model. The power–trigonometric model estimated the radiation values best. The quadratic and linear–logarithmic models are the preferred models when only the relative sunshine is used.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0306-2619
1872-9118
DOI:10.1016/S0306-2619(99)00025-2