Estimating global , direct , diffuse and reflected solar radiation on horizontal and tilted surfaces in Tripoli , Libya

Abstract

Solar energy occupies one of the most important types of renewable energy sources . It is the energy provide by the sun .Solar radiation data are fundamental inputs for solar energy applications , such as photovoltaic , and solar thermal systems . The design of a solar energy conversion system requires knowledge regarding the availability of global solar radiation and its component at the location of interest