Journal of Energy in Southern Africa
On-line version ISSN 2413-3051
AGBO, Solomon. Evaluation of the regression parameters of the Angstrom-Page model for predicting global solar radiation. J. energy South. Afr. [online]. 2013, vol.24, n.2, pp. 46-50. ISSN 2413-3051.
A simple and empirical model for the estimation of average monthly global solar radiation for a Nigerian location is presented. Regression coefficients satisfying the Angstrom-page model have been obtained using clearness index (KT) and the relative sunshine data for the location. The test of validity of the model was done by evaluating the following statistical parameters: the mean bias error (MBE), root mean square error (RMSE), mean percentage error (MPE) and the correlation coefficient (CC). The results obtained from the statistical tests show that the new model is reliable for high precision estimation of global solar radiation. A comparison between the new model and other models is presented.
Keywords : global solar radiation; predicting models; sunshine duration; clearness index.