Análise de cenários para obtenção de economia na fatura de energia elétrica de um hotel de Manaus, AM

Abstract

Due to the intense use of electricity in consumer companies served by high voltage inBrazil, this study simulated the financial savings with the installation of a PhotovoltaicSolar Plant (USF) in three scenarios of the contracted demand of a Consumer Unit (CU) in the hotel sector from Manaus, AM. The methodology consisted of verifyingwhether the tariff framework is adequate for the contracted demand of the UC. Subsequently, the optimal energy demand and its tariff framework were determined, verifying possible financial savings in this adaptation. The next steps were to verifythe savings generated by the installation of the dimensioned UFV – theoretically –considering the scenarios: 1) with a 100% reduction in the UC consumption, requiringadaptation of the demand contract for the power of the plant; 2) limiting the UFVpower to the current contracted demand and; 3) limiting the UFV power to thecalculated optimal demand. With the acquisition values of the UFV, obtained througha budget with local companies, an economic analysis of the scenarios was carriedout considering a useful life of 25 years, interest rate of 12.75% per year, corresponding to the Selic rate for the September 2021 to August 2022. Discountrates of 5% per year and energy inflation of 7% per year were also considered. The results showed that changing the type of tariff and changing the contracted demandwould generate savings of 14.35% on the energy bill. It was also found that the threescenarios of use of photovoltaic solar energy present favorable economic indicators. The conclusion was that the consumer unit can reduce its expenditure on electricityby making contractual changes in demand and installing a photovoltaic generationsystem; and the combined scenario of generation with optimal demand presented thebest economic indicators.