An estimation of global solar radiation for Gulf Cooperative Council countries

Abstract
There have been many trials to obtain empirical equations for estimating monthly global solar radiation. This paper modifies the model suggested by Barbaro et al. [10] so that it can be applied to six countries in the Arabian Gulf having a hot climate. The relationship obtained by the present work is: and the average deviation does not exceed 8%. Individual models are produced for each country separately to increase the accuracy. These are presented as equations 6 to 11 inclusive. The zone parameters for the overall and the individual models are shown in Table 1.