Análise técnica e econômica de geradores fotovoltaicos em uma indústria de médio porte em Porto Alegre

Abstract

The best use of photovoltaic solar energy answers the questions about planning the composition of the energy matrix in Brazil, necessary in the face of the growing demand for electric energy and the population environmental concerns. In this context, the present work aims to analyze technically and economically the installation of grid-connected photovoltaic panels in a medium-sized industry in Porto Alegre. For the development of the analysis, information and data were collected in field, which configures the applied nature of the research. Modeling and simulation were used as a research technical procedure. As a result, two photovoltaic systems were technically dimensioned, one of 23.76 kWp and another of 39.6 kWp. These two projects together with the variation of the Minimum Acceptable Rate of Return of the investor and with the system of tariff flags, configured the total of 24 scenarios modeled. Economic Engineering methods such as NPV, IRR, Simple Payback and Discounted Payback were used, as well as the LCOE levelized energy indicator, for economic viability analyzes. As the main result, the scenario with the highest economic attractiveness, corresponding to the 39.6 kWp system, obtained NPV of R$ 334,502.27, monthly IRR of 2.79%, Simple Payback of 40 months, Discounted Payback of 50 months and LCOE of 0.1374 R$/kWh. Thus, it was concluded that there is technical and economic viability of the electric power generation projects developed. This is because in 16 scenarios the IRR exceeded the MARR of the medium-sized industry used as a case in this work.