Abstract
In the present work, we studied some theoretical models to estimate the components of solar radiation received at ground level. These models take into account the effects of scattering and absorption of solar radiation during its passage through the atmosphere. They are based on the determination of transmission coefficients of different atmospheric constituents. These factors require the availability of current meteorological parameters (relative humidity, air temperature, atmospheric pressure…etc.) and geographical parameters of the considered site as latitude, longitude and altitude. In this work we propose to estimate global solar radiation in two sites of Algeria: Tamanrasset and Ilizi. For this purpose three models are used: Lacis&Hansen, Lieu & Jordan and Capderou models Models were compared on the basis of statistical error tests using the coefficient of determination (R2), the root mean square error (RMSE).
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