Renewable Energy System Applied to Social Housing Building in Mediterranean Climate

he article analyses a hybrid heat pump system integrated with renew-able energy sources both to produce heat and electricity to optimize energy con-sumption in public residential buildings. The proposed case study is a medium-small sized (13 apartments) building in reinforced concrete built in 1980, site in the province of Rome owned by ATER. This type of building is extremely popular on the outskirts of the city. In the system analysed, the existing boiler and the newly installed air-water-electric heat pump, and hybrid photovoltaic panels are used in a combined way. Using this approach can reduce energy consumption in buildings with low envelope performance, especially where, for different reasons, it is difficult to intervene. Furthermore, the interventions are punctual and require almost no work inside the apartments. The results show that the production of heat from PV-T panels achieves 79% of the thermal energy demand, and 75% reduction in electricity consumption followed. Additionally, electrical energy consumption has a renewable coverage of 100% annually. Finally, primary energy savings can reach 85%.