کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1552150 | 998171 | 2008 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Comparison and validation of three global-to-beam irradiance models against ground measurements Comparison and validation of three global-to-beam irradiance models against ground measurements](/preview/png/1552150.png)
The study presents a comparison and validation of 3 state of the art-global-to-beam irradiance conversion models against ground measurements from 22 sites covering a wide range of latitudes, altitudes and climates. One of the 3 models takes into account a climatic turbidity and gives slightly better results in terms of bias and precision.On a hourly time step basis, the validation on over 100,000 station-hour values shows that the normal beam irradiance can be evaluated from the global horizontal component with a negligible bias and a precision of 85 W m−2 or 23%.When the models are used on data with a shorter time step, the performance decreases, but remains acceptable. With a modification of the DirIndex (or the DirInt) model, the performance can slightly be increased and reach a bias of 2% and a precision of 28% for 10 min data.
Journal: Solar Energy - Volume 82, Issue 6, June 2008, Pages 501–512