Abstract:
A model for the prediction of average monthly global solar radiation on horizontal surface
for some locations in the tropical climate zone is presented. Global solar radiation and
sunshine duration data for five Nigeria Stations were used to fit in the Angstrom Model for the clearness index (KT = H/Ho), the relative sunshine duration (S/Smax.),maximum
temperature and mean temperature. The test performance of the models for the five
stations have been done in terms of the widely used statistical indicators, the Mean Bias
Errors (MBE) and Root Mean square Error (RMSE). It was found from statistical models
performance indicators that the models provided reasonably high degree of precision in
the prediction of average monthly global solar radiation on horizontal surfaces.
