Statistical comparison of models for estimating solar radiation on inclined surfaces
The objectives of this study are to compare statistically three models for estimating solar radiation on inclined surfaces and to recommend one that is general and accurate. The isotropic model, and Klucher's and Hay's anisotropic models are chosen for discussion. The hourly and daily formulations of these models are briefly described. Results show that they all produce large errors at steep slopes. The errors are minimum during the summer months. The isotropic model underestimates consistently throughout the year resulting in the worst performance. Hay's model also under-estimates constantly but by a smaller amount. Klucher's model overestimates in the summer and under-estimates in the winter, but can be considered just as general and accurate as Hay's Model for estimating insolation on inclined surfaces.
- Research Organization:
- Department of Mechanical Engineering University of British Columbia, Vancouver
- OSTI ID:
- 5051536
- Journal Information:
- Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States), Vol. 6
- Country of Publication:
- United States
- Language:
- English
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