Modeling and Optimization of the Global Solar Irradiance Collecting Efficiency

Abstract

This article presents a mathematical model for estimating the direction of the maximal global solar irradiance (MGSI) based on actual values of direct/beam and diffuse irradiance, model that can be used to determine a correct value of the global collecting efficiency of solar tracking systems. Using this model, the collecting efficiency can be improved by tracking the solar conversion surface to minimize its incidence angle with the maximal global irradiance instead of the beam irradiance. The analysis of the numerical results obtained using in-field data-based simulations showed a significant improvement of the real collecting efficiency, especially during cloudy days when the diffuse irradiance is preponderant.

Experimental Research of Double-Sided Solar Modules Efficiency in the Climatic Conditions of Central Kazakhstan

“…The good example of the double-sided modules use for the electric energy generation is the project in the Japanese city of Asahikawa [6][7][8][9]. It is the coldest city in the country, it has the lowest temperature in the country -minus 41°C, while the thickness of the snow cover is about 70 cm, it is even more than the average value in Kazakhstan, and the snow melts longer than in other regions of the country.…”