Prediction of solar global radiation on a surface tilted to the south

Avraham I. Kudish; Efim G. Evseev

doi:10.1117/12.794461

11 September 2008 Prediction of solar global radiation on a surface tilted to the south

Avraham I. Kudish, Efim G. Evseev

Proceedings Volume 7046, Optical Modeling and Measurements for Solar Energy Systems II; 704603 (2008) https://doi.org/10.1117/12.794461
Event: Solar Energy + Applications, 2008, San Diego, California, United States

Abstract

Solar global and diffuse radiation intensities are, in general, measured on horizontal surfaces, whereas stationary solar conversion systems (both flat plate solar collector and PV) are tilted towards the sun in order to maximize the amount of solar radiation incident on the collector surface. Consequently, the solar radiation incident on a surface tilted to the south (northern hemisphere) must be determined by converting the solar radiation intensities measured on a horizontal surface to that incident on the tilted surface of interest. There exist a large number of models designed to perform such a conversion. Eleven such models have been tested utilizing data measured in Beer Sheva, Israel. The data consist of hourly solar global and diffuse radiation on a horizontal surface, normal incidence beam and global radiation on a south-oriented surface tilted at 40°. The individual model performance is assessed by an inter-comparison between the calculated and measured solar global radiation on the south-oriented surface tilted at 40° using both graphical and statistical methods. The relative performance of the different models under different sky conditions, i.e., clear, partially cloudy and cloudy as defined by the hourly clearness index value, has been studied.

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Avraham I. Kudish and Efim G. Evseev "Prediction of solar global radiation on a surface tilted to the south", Proc. SPIE 7046, Optical Modeling and Measurements for Solar Energy Systems II, 704603 (11 September 2008); https://doi.org/10.1117/12.794461

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KEYWORDS

Solar radiation models

Data modeling

Solar radiation

Databases

Performance modeling

Atmospheric modeling

Systems modeling

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