Abstract:
Solar radiation data are essential in the design of solar energy conversion devices. In this regard,
empirical models were selected to estimate the global solar radiation on horizontal and inclined surfaces.
The hourly solar radiation data measured at the study area during the period of 2004e2007, were used to
calculate solar radiations using selected models. The selected models were compared on the basis of
statistical methods. Based on the results, a new model, H/Ho ¼ 0.19490 þ 0.4771(n/N) þ 0.02994 exp(n/N)
has been developed, based on Kadir Bakirci linear exponential model. This is highly recommended to
estimate monthly mean daily global solar irradiation, on a horizontal surface. Further, a model to convert
horizontal solar global radiation to that of radiation on a tilted surface is also presented. It is based upon
a relatively simple model proposed by Olmo et al. which requires only measurements of horizontal solar
radiation. The developed model appears to give excellent results and has the advantage of being relatively
simple for applications. The present work will help to improve the state of knowledge of global
solar radiation to the point where it has applications in the estimation of global solar radiation, both on
horizontal and inclined surfaces.
Citation:
Muzathik, A. M., Ibrahim, M. Z., Samo, K. B., & Wan Nik, W. B. (2011). Estimation of global solar irradiation on horizontal and inclined surfaces based on the horizontal measurements. Energy, 36(2), 812–818. https://doi.org/10.1016/j.energy.2010.12.035