To make the best use of renewable energy

a system of solar-heat pump composite energy was formed by combining solar PV/T collector with heat pump. Switching between the different valves can achieve many operating modes to meet people's need for hot water and heat and cooling. The experiment mainly studied three operating modes: single-air-source heat pump

solar PV/T collector with water-source heat pump

and solar PV/T collector with dual-heat-source heat pump. Indoor temperature

heat capacity

COP

thermal efficiency and electric efficiency were investigated experimentally and analyzed theoretically. Results showed that COP were 2.26

3.4 and 2.61

respectively

along with average indoor temperature of 15.3

18.8 and 16.5℃

which can basically meet the need for heating load in winter. The advantage of solar energy and heat pump were made full use and realized energy conservation

which provide some reference for solar and heat pump operation modes in buildings.