Estimativa da economia com a implantação de um sistema fotovoltaico em uma unidade consumidora de secagem e beneficiamento de café

Abstract

This study aims to analyze the implementation forecast of a photovoltaic energy generation system in a consumer unit focused on the region and coffee processing, located in the East of Minas Gerais. For this purpose, bibliographic reviews were carried out on tariff modalities, coffee drying and processing, photovoltaic system, economic indicators such as NPV, IRR, Payback and VAUE. An analysis of the unit's consumption profile was made through electricity bills. The system was dimensioned using the PV*SOL Premium software (test version), with which it was possible to simulate the generation of photovoltaic energy based on the information collected about the unit's consumption. The equipment used in cleaning, processing and storing coffee was identified, as well as the area available for installing the system. A project was carried out to determine which panels would be needed according to consumption. In addition, an Excel spreadsheet was created to identify the credits for generating the SFV, the savings and the annual expense with the electricity bill. Based on the calculations performed, it was possible to evaluate the economic conclusions of implementing the photovoltaic system in four different scenarios: (1) payment in cash, without using the credits originated by the system; (2) payment in cash, with the use of credits; (3) financing, without using the credits; and (4) financing using the credits from the photovoltaic system. The results demonstrate that the implementation of a photovoltaic system in the consumer unit is technically and financially viable, in scenarios 2, 3 and 4. Both by paying the amount of R$ 53,000.00 in cash and by financing with an interest rate of 3% per year. The SFV generates savings of around R$9,115.39 per year without using credits, and with the use of credits it generates savings of around R$17,690.62, an expense on the electricity bill of around R$936.43. With a Minimum Attractiveness Rate (MAR) of 14.75%, scenario 1 was the only one in which the installation of the SFV was not financially viable.