EMPIRICAL MODEL FOR THE ESTIMATION OF GLOBAL SOLAR RADIATION IN DHAKA, BANGLADESH

Abstract

This work proposes the coefficients for Angstrom-Prescott type of model for the estimation of global solar radiation in Dhaka, Bangladesh using the relative sunshine duration alongside the measured global solar radiation data (1983-2010). The model constants a and b obtained in this investigation for Dhaka are 0.23 and 0.57 respectively. The correlation coefficient of 87% between the clear sky index and relative sunshine duration, as well as the coefficient of determination of 75.7 obtained shows that this model fits the data very well. Consequently, the developed model in this work can be used with confidence for Dhaka and other locations with