Heating water represents a significant portion of household power consumption in Brazil. According to Rees (2016), although Brazil is the sixth country that least pollutes the environment to produce electricity: about 100 grams of CO 2 are released into the atmosphere to produce 1 kWh of power in this country.
Besides, oil and gas will remain dominant in the matrix, accounting for 50% of total energy consumption in 2030.
Considering the scenario of a house that already has a water well, thereby eliminating the drilling cost, the best payback is obtained using a Ground-Source Heat Pump.Īccording to forecasts by the International Energy Agency (IEA), world energy consumption will increase by 45% between 20. The results of COP and payback were compared with other papers and the maximum difference was 10% and 12%, respectively. A case of study was performed for three different cities in Brazil and the paybacks found were in the range of 2.28 and 4.45 years. The results showed that the COP of a Hybrid Source Heat Pump was better than other types of heat pump configurations for most environmental conditions, but the best payback was obtained using a Solar-Assisted Heat Pump. The influence of ambient temperature, solar radiation, water well depth and ground water temperature in the COP, payback and collector efficiency were analyzed. This theoretical analysis was made using lumped models for each component of the system. The refrigerant chosen for the heat pump was R290 (propane). The system considered has an open-loop ground-water (aquifer) and an uncovered solar collector that can be used in a separate or connected in series topology. This work presents a study for examining the viability of Solar Geothermal Hybrid Source Heat Pump systems to produce domestic hot water in Brazilian-type climates.
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