Análise de viabilidade econômica para a implementação de um sistema solar fotovoltaico conectado à rede de duas repartições públicas no município de Monte Alegre do Piauí

Abstract

Energy consumption increases with economic development and, due to concerns about environmental issues, sustainable production is indispensable. The work presents a study on the economic feasibility of deploying two photovoltaic systems connected to the electricity grid, one in the city hall and the other in a public building located in the town of Ingazeira, both in the city of Monte Alegre do Piauí. In this study, data were collected to obtain energy consumption, solar radiation index and energy values charged by local utilities. The photovoltaic system at the City Office comprises a photovoltaic generator composed of 32 photovoltaic modules and an inverter, with a nominal power of 17.12 kWp for the production of 28,749.1 kWh of energy per year. In the Povoado Ingazeira system, there is a photovoltaic generator composed of 82 photovoltaic modules and an inverter, with a total nominal power of 43.87 kWp to produce a total of 73,669.6 kWh of energy per year. The analyzes were performed using indicators of economic feasibility, discounted payback, Net Present Value (NPV) and Internal Rate of Return (IRR). The results obtained demonstrate the project as economically viable for implementation, with a payback time of 5 years for both systems, positive NPV for year 25 of R$ 2,473,885.30 and IRR for year 25 of 32 .66 % for the City Hall and NPV for year 25, positive, of R$ 6,259,350.75 and IRR for year 25 of 33.57%.