Comparison and fitting of several Global-to beam irradiance models in SpainReportar como inadecuado

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1 Solar Thermal Energy Department 2 UPNA - Universidad Pública de Navarra Espagne 3 AICIA

Abstract : In this paper, a comparison of different global to beam irradiance models has been performed. In a first step, five global-to-beam irradiance models are compared against ground measurements from three sites in Spain. Four of these existing models have also been fitted in the selected sites, and the results are presented as well. Finally, one new model fully described in paper 11693 is also compared with the same ground measurements. The model comparison has been made by means of first and second order statistics, as RMSE and some parameters based on Kolmogorov-Smirnov test. The comparison of the beam irradiance provided by the models with the measured beam irradiance shows a similar behavior of the existing models in the selected Spanish sites. The four new fitted models show a better behavior related to the first order statistics, but the fitted models do not provide appropriate results when the irradiance is very high. The results provided by the new developed model seem to be better than the others. As it is a first approach, these results confirm that the applied methodology is appropriate for this objective, and it will be further developed in future works.

keyword : global and beam irradiance model comparison solar radiation

Autor: Íñigo Pagola - Martín Gastón - Carlos M. Fernández-Peruchena - Jose Luis Torres - Manuel Silva - Lourdes Ramírez -



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