With the growth of Heating, Ventilation and Air Conditioning (HVAC) systems globally, the move to efficient HVAC systems powered by renewable energy sources becomes more important. The combination of photovoltaic thermal modules and heat pumps can generate both electricity and heat on a domestic scale. However, as solar energy can be intermittent and varying, it is important to experimentally understand the effects of solar variation on the system performance. Therefore, in this study, the combined Indirect Expansion Photovoltaic Thermal Heat Pump (IEPVT/HP) system is experimentally evaluated under controlled and monitored short cycling conditions. The IEPVT/HP system is monitored over a one-hour operating time in the range of solar irradiances [250 W/m2-650 W/m2]. Results show the IEPVT/HP system successfully cools the PV surface of the PVT module by up to 33oC. This leads to an electrical efficiency increase of up to 1.4%, correlating to a 27.5% increase in electricity generated. The short cycling frequency increases as solar irradiance increases and the heat pump experiences peak COP values up to 7, greater than the manufacturer rating of COP = 3.
|Title of host publication||Proceedings of 13th IEA Heat Pump Conference|
|Publication status||Published - Sep 2020|