Estimation of Solar Radiation from Sunshine Hours in Dacca, Bangladesh

Abstract

Solar radiation and sunshine hours data of the Dacca area are analysed. An attempt is made to relate monthly mean daily total horizontal radiation with the extra-terrestial daily horizontal radiation and mean fraction of daily possible sunshine hours by a regression equation. Good correlation is found. The equation is used to estimate the radiation for a few months whose data are not used to compute the regression coefficient and the resulting estimated values are seen to be in reasonably food agreement with the actual values.