Calculation of ground albedo for the estimation of global radiation on tilted surfaces, for four European locations

Ground albedo can influence the estimation of solar radiation incident on tilted surfaces. Depending on the model used to calculate the skv diffuse radiation and the estimated albedo value, it is possible to introduce a significant error in the prediction of global radiationon a tilted surface. In this paper, several methods for calculating ground albedo values used for estimating the global radiation on a tilted surface, are proposed and evaluated. The predicted global solar radiation values are compared with measured data on a south facing vertical surface. from four representative south and north European locations. It appears that there is a significant impact on the accuracyof calculating the global solar radiation incident on a tilted surface using different methods for calculating ground albedo values. [ABSTRACT FROM AUTHOR]