Análise da viabilidade de implantação de um sistema de geração de energia elétrica por meio de painéis fotovoltaicos em uma edificação já construída na cidade de Alegrete - RS

Abstract

The generation of electric energy through solar panels has been growing a lot in recent years, surpassing the most optimistic expectations. Brazil has great potential for this type of energy generation system due to the high rate of solar radiation that reaches our country. The solar panels are made of photovoltaic cells made of semiconductor materials, such as silicon. These cells are capable of transforming solar radiation into electrical energy by the so-called "photovoltaic effect". This technology could be applied in residential or commercial buildings in order to generate energy savings. Therefore, the objective of this work was defined as the feasibility analysis of the implantation of a system of electric power generation through photovoltaic panels in a building. For this analysis was selected the Marana building with 6 floors and 12 apartments, located in the city of Alegrete, in the state of Rio Grande do Sul. It was proposed the installation of photovoltaic panels on the roof of the garages located at the rear of the building. In this work, proposed the installation of 96 photovoltaic modules with 270 Wp of power each, reaching a generator system of 25.92 kWp. The results of the analysis show a reduction of up to 87% in energy consumption from the utility, compared to the history of the average electric energy consumption of the building. The investment cost of this system was calculated in the amount of R$ 116,000.00, and the total return time of the investment was four years. At the end of the study, it was concluded that the alternative system is economically viable and capable of supplying a large amount of electricity demand, however, the effect of panel shading during the colder months of the year may represent a loss of Effectiveness of the system.