OPTIMIZATION OF PHOTOVOLTAIC MODULES INCLINATION IN FUNCTION OF THE INCIDENT SOLAR RADIATION IN PELOTAS REGION, RS
DOI:
https://doi.org/10.59627/cbens.2007.1297Keywords:
Solar Energy, Photovoltaic, Solar RadiationAbstract
The solar radiation is, undoubtedly, the main source of energy for our planet, however its use for the direct conversion in electric energy is still quite limited. This limitation is due, is partly due to, at the installation cost. Besides, the photoconversion process does not succeed in utilizing all the incident solar energy in the module. Researchers agree that the generated energy is influenced by the inclination angle with the horizontal one. Thus, this work seeks to determine the best inclination of photovoltaic modules in agreement with the characteristics and the readiness of the solar radiation in Pelotas region, seeking searching for decreasine costs and taking advantage of the best solar energy. The best angles of monthly, seasonal and annual inclination were calculated, as well as the amount of annual energy received by the module with these angles. The gain was verified in the amount of received energy as different inclinations were compared to each other. In these calculations, the isotropic model developed by Liu & Jordan (1963) was used; the diffuse solar radiation in the horizontal plan was obtained by the model of Collares-Perreira & Rabl (1979). The results demonstrated that the best angle of monthly inclination varies from 0o, in the summer, to 59o, in the winter, and the best angle of seasonal inclination varies from 0o, in the summer, to 54o in the winter. The adoption of the best monthly angle compared to the seasonal propitiates a gain of 0,9%. The best angle of annual inclination is 26o. The best angle of monthly and seasonal inclination present a gain in the amount of energy received respectively by the module of 5,5% and 4,6%, when compared to the best annual angle
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