Análise comparativa entre um sistema completamente fotovoltaico e um sistema fotovoltaico conjugado com aquecimento solar de água

Abstract

The present paper aims to compare a completely photovoltaic system for electric generation and a conjugated photovoltaic system with a solar water heating one, due to considerable quantity of energy that the electric shower consumes in a residence. For this, it was made a price search with companies specialized in photovoltaic energy were quoted to an average generation of 1300 kWh/month and 910 kWh/month, since the electric shower is responsible for consuming, in average, 30% of the energy of a house. To complete the conjugated system, a budget of a solar water heating system was made with another company, since the ones specialized in photovoltaic did not make the installation of both systems. This solar water heating system was based on the number of people living in the house, so it was budgeted with a 600L consume. The cost of the photovoltaic system generating energy for the entire house was R$43.659,00, while the cost of the combined system was R$29.367,23, reducing the price in R$14.291,77, or, having an economy of 33%. Thereby, it could be observed that for a singlefamily residence it is more advantageous using a combined system of photovoltaic and solar collectors, than an entirely photovoltaic system.