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

This work proposes the coefficients for Angstrom-Pr escott type of model for the estimation of global sradiation in Dhaka, Bangladesh using the relative sunshine duration alo ngside the measured global solar radiation data (19 83-2010). The model constants a and b obtained in this investigation fo r Dhaka are 0.23 and 0.57 respectively. The correla tion 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 develope d model in this work can be used with confidence fo r Dhaka and other locations with similar climate conditions.