Experimental investigation on the heating and cooling performance of a solar air composite heat source heat pump

The mutual coupling between different heat sources will reduce the impact of dynamic environmental conditions on the performance of the heat pump. In this paper, a solar-air composite heat source heat pump (SA-CHSHP) is built and tested in outdoor dynamic environment. The experimental prototype can realize heating and refrigeration. The heating performance of the SA-CHSHP system is tested under different weather conditions. In autumn, the highest COPm of the system can reach 4.80 in sunny days, and the lowest COPm is higher than 2.7 in cloudy days. Meanwhile, when the ambient temperature is 5.85 degrees C-13.99 degrees C in winter, the COPm can reach 2.87-3.80, and the operation process is stable. In nights, the cooling performance of the composite heat source heat pump is investigated, the refrigeration COPm is approximately 1.7. The SA-CHSHP system effectively uses air sources and solar energy, which can run stably under various working conditions. (C) 2020 Elsevier Ltd. All rights reserved.