(12)by Leung, are summaries Method of model evaluation Our correlations were developed using pairs of H/ H 0, S/ S 0, latitude, longitude, and altitude at 41 locations. ![]() 4, 5, 6, 7, 8, where empirical correlations are given. (2)with other models.Īn earlier correlation for estimations of monthly average daily global solar radiation on horizontal surfaces was proposed in Ref. For this purpose, we have compared our Eq. The objective of this study is to establish that our correlations may be used for the prediction of total solar radiation on horizontal surfaces in KSA. ![]() (1)produced the best estimates for H of the 11 correlations used in Ref. They compared these models and linear models, based on local values of a and b in terms of MBE, RMSE, MPE, and MABE. Rehman and Halawani utilized H and S to develop 11 empirical correlations as functions of S, φ, ψ, and h. ![]() Mean values of H (Wh m −2), S (h), a and b, latitude, longitude, and altitude are summarized in Table 1. ![]() The Kingdom of Saudi Arabia (KSA) has 41 solar radiation stations covering the country. These data are scarce in developing countries but available in most industrialized countries. For the proper design of solar-energy conversion and utilization devices, long-term measurements of total solar radiation are needed.
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