Article,
Evaluation and comparison of hourly solar radiation mod
International Journal of Energy Research, (2009)
Abstract
In this paper, an attempt has been made to develop a new model to
evaluate the hourly solar radiation for composite climate of New
Delhi. The comparison of new model for hourly solar radiation has
been carried out by using various model proposed by others. The root
mean square error (RMSE) and mean bias error (MBE) have been used
to compare the accuracy of new and others model. The results show
that the ASHRAE and new proposed model estimate hourly solar radiation
better for composite climate of New Delhi in comparison to other
models. Hourly solar radiation estimated by constants obtained by
new model (modified ASHRAE model) for composite climate of India
is fairly comparable with measured data. The percentage mean bias
error with new constants for New Delhi was found as low as 0.15 and
0% for hourly beam and diffuse radiation, respectively. There is
a 1.9â8.5% RMSE between observed and predicted values of beam radiation
using new constants for clear days. The statistical analysis has
been used for the present study.
