Verification of some very simple clear and cloudy sky models to evaluate global solar irradiance

被引:94
作者
Badescu, V
机构
[1] Candida Oancea Inst. of Solar Energy, Polytechnic University of Bucharest
关键词
D O I
10.1016/S0038-092X(97)00057-1
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Several very simple clear sky and cloudy sky global irradiance models were tested under the climate and latitudes of Romania (Eastern Europe). The very simple clear sky models do not require meteorological data while the very simple cloudy sky models need only data on the total cloud amount. Three slightly more complex cloudy sky models which use additional meteorological inputs were also tested. The mean absolute error of the very simple clear sky models varies between 7 and 14% in July and between 12 and 19% in January. The best model originates from Western Europe. The performance of the very simple cloudy sky models is comparable to that of the more complicated ones. This is the main conclusion of-the paper. Generally, their root mean square error Varies between 35 and 45% in close agreement with results from the literature. Twelve classes of daily average cloudiness were defined. The model accuracy is better for the first six classes (with smaller cloud amount) and worse for the other six classes. (C) 1997 Elsevier Science Ltd.
引用
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页码:251 / 264
页数:14
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