Avaliação técnico-econômica comparativa de sistemas de aquecimento de água utilizando diferentes fontes energéticas (elétrica, solar e GLP)

Abstract

This work carried out a comparative technical - economical evaluation for water heating systems in the city of Cascavel - PR. Different systems were designed: electric power from the utility (electronic shower), solar thermal (solar collector), solar photovoltaic (photovoltaic panels to power the electric resistance of an electronic shower) and gas heater. It was determined scenarios, considering each system exclusively and others having solar thermal energy as base and other systems as auxiliary. The cost of acquisition, installation, maintenance and auxiliary energy consumption were measured, which enabled the calculations of the costs of each annualized scenario. These calculations showed that although the solar heater is financially profitable, in the region of the country where the study was conducted, it does not supply enough energy demand for the entire year, and there is a need for an auxiliary energy source. The best scenario for this situation was the solar heater with auxiliary power supply. The two systems together proved the best technical-economic feasibility.