Avaliação e comparação da eficiência de painéis fotovoltaicos instalados na Unioeste, campus de Cascavel (PR), considerando diferentes inclinações e níveis de sujidade

Abstract

This research aimed to verify the influence of dirt and inclination of the panels of a photovoltaic solar system connected to the grid, installed at the State University of Western Paraná - UNIOESTE, Cascavel – PR campus. The system consists of ten photovoltaic modules of 330 Wp each (two panels with five modules in series), and an inverter of 4 kWp. At first, the two panels were cleaned (both facing north, with an inclination of 21º in relation to the horizontal plane), and for a period of nine weeks, only panel 1 was washed weekly, while the panel 2 was kept in ambient conditions, without any cleaning. After the collection of this data, both panels were washed again, and the inclination of panel 1 was changed to 26º, and then maintained equal for nine weeks. After this period, the inclination of panel 1 was changed to 16º, and maintained again for nine weeks. In both analyzes, the data collected from generation of panel 2, which was not washed weekly and remained at its original inclination of 21º, were used as a reference. Subsequently, the Analysis of Variance test (ANOVA) was applied to the average of the daily efficiencies of the panels. It was possible to conclude that there was a significant difference in the module washing experiment and also in the case study in which panel 1 was kept at 21º and panel 2 at 18º. Furthermore, the result of the Tukey test shows that the averages in the two cases mentioned above are different from each other. However, there was no difference when comparing the efficiency averages between the angles of 21º and 26º in the analyzed period.