研究目的
Determining the best tilt angle of photovoltaic solar panels to maximize absorption of solar radiation for selected periods, considering all solar irradiance components and the spectral response of typical silicon cells.
研究成果
The study demonstrated an increase in solar radiation absorption by optimizing the tilt angle of PV panels compared to the traditional installation angle based on local latitude. The highest gain was observed for the winter season, amounting to over 14%. The proposed method is universal and can be extended to any location.
研究不足
The study assumes clear sky conditions and does not account for cloud cover or other weather variations. The model's accuracy depends on the input atmospheric data, which may not be available for all locations.
1：Experimental Design and Method Selection:
Used a sophisticated atmospheric radiative transfer model (SMARTS2) to calculate direct and diffuse solar irradiation. The Regula-Falsi numerical method was employed to find the tilt angle maximizing solar radiation absorption.
2：Sample Selection and Data Sources:
Calculations were carried out for S?o Carlos (SP), Brazil, with geographic coordinates of latitude -22°01′03″ S, longitude -47°53′27″ W, and an average altitude of 854 m.
3：List of Experimental Equipment and Materials:
Solar spectral irradiance data collected by satellites, SMARTS2 spectral radiation model, and typical silicon solar cells.
4：Experimental Procedures and Operational Workflow:
Calculated solar spectral irradiance at ground level, weighted by the spectral response of silicon solar cells, and integrated to obtain total solar irradiance. The optimal tilt angle was determined by finding the root of the derivative of solar irradiation with respect to the tilt angle.
5：Data Analysis Methods:
Used a numerical fourth-order derivation method and the Regula-Falsi method for root finding.
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