15 September 2011
The Sol-Air Heat Pump (SAHP) has refrigerant-circulating outdoor (SA) panels with which heat is exchanged in the atmosphere by both radiation and convection. In the heating cycle, the SAHP works in solar-source and air-source mode complementarily. In the
cooling cycle, the SAHP works as a nocturnal radiator. The recently developed SAHP has photovoltaic cells attached on the panels. Its operating results showed efficient use of solar
energy in heat and power, but it left some room for further improvement. The future SAHP will be integrated into a ground loop system, named the ReGL, to harness various renewable
energies in the atmosphere and under the ground. The ReGL system is intended to supply most of the thermal energy demands in a building, namely, space heating and cooling, domestic hot water supply, and refrigeration.