Solar radiation: Correlation between measured and predicted values in Mubi, Nigeria

Abstract

In this study, the correlation between measured and predicted values of solar radiation was made. A series of daily measurements of the global solar radiation on a horizontal surface was recorded in Mubi with the aid of a constructed pyranometer. The monthly average value was determined. The monthly average daily solar radiation on horizontal surface was also determined using sunshine duration. These parameters were input in some radiation models to compute the solar radiation. Finally, a prediction of the global solar radiation from climatological data has been attempted. The predicted values have been compared with the corresponding measured values. Predictions and measurements were found to be in rather good agreement. These results indicate that the pyranometer developed may be used satisfactorily for the measurement of solar radiation in the world.