Computing global and diffuse solar hourly irradiation on clear sky. Review and testing of 54 models |
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Authors: | Viorel Badescu Christian A GueymardMadalina Baciu Alexandru Dumitrescu Flavius IacobescuIoan Milos Costel Rada |
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Affiliation: | a Candida Oancea Institute, Polytechnic University of Bucharest, Spl. Independentei 313, Bucharest 060042, Romania b Solar Consulting Services, P.O. Box 392, Colebrook, NH 03576, USA c National Research and Development Institute for Environmental Protection, Splaiul Independentei nr. 294, Sect. 6, Bucuresti 060031, Romania d National Meteorological Administration, 97 Sos. Bucuresti-Ploiesti, Bucharest 013686, Romania e University of Bucharest, Faculty of Geography, Bucharest, Romania |
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Abstract: | Fifty-four broad band models for computation of global and diffuse irradiance on horizontal surface are shortly presented and tested. The input data for these models consist of surface meteorological data, atmospheric column integrated data and data derived from satellite measurements. The testing procedure is performed for two meteorological stations in Romania (South-Eastern Europe). The testing procedure consists of forty-two stages intended to provide information about the sensitivity of the models to various sets of input data. There is no model to be ranked “the best” for all sets of input data. Very simple models as well as more complex models may belong to the category of “good models”. The best models for solar global radiation computation are, on equal-footing, ESRA3, Ineichen, METSTAT and REST2 (version 81). The second best models are, on equal-footing, Bird, CEM and Paulescu & Schlett. The best models for solar diffuse radiation computation are, on equal-footing, ASHRAE2005 and King. The second best model is MAC model. The best models for computation of both global and diffuse radiation are, on equal-footing, ASHRAE 1972, Biga, Ineichen and REST2 (version 81). The second best is Paulescu & Schlett model. |
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Keywords: | Clear sky models Global solar radiation Diffuse solar radiation Hourly irradiation Romania |
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