Article : Estimation Of Daily Global Solar Irradiation At Oweri, IMO State (NIGERIA) From Hours Of Sunshine, Minimum And Maximum Temperature And Relative Humidity

Title

Estimation Of Daily Global Solar Irradiation At Oweri, IMO State (NIGERIA) From Hours Of Sunshine, Minimum And Maximum Temperature And Relative Humidity

Author

Ekwe M.C, Joshua J.K, Igwe J.E

 For applications in renewable energy, the solar radiation data and their respective components in a region must be known for the design of a system. In locations where solar radiation data is not available, this parameter can be determined accurately by performing a reasonable empirical correlation. In the study, the models of global solar radiation on the horizontal surface in the literature are investigated, and a new empirical model 5 for Owerri based on hours of sunshine, minimum and maximum temperature, and relative humidity data for Owerri, Imo State (Nigeria) is developed. The performance parameters of the model are: Root Mean Square Error, RMSE = 0.240, Mean Bias Error, MBE = -0.0192, Mean Percentage Error, MPE = -0.106, correlation coefficient, R =0.995 and coefficient of determination, R2= 0.99. The results obtained indicate that the correlation developed in the study predict the global solar irradiation reasonably well for Owerri, Nigeria for the future projections. The model could be employed in estimating global solar radiation of location that has the same geographical location information as Owerri, Imo State (Nigeria).   

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