Application of heat storage air type solar collector and air-source heat pump composite heating

 Designs a heat storage air type solar collector and air-source heat pump composite heating system. This system operates in three modes of solar heating, solar assisted heat pump heating and heat pump heating. It can automatically switch the operation mode according to the change of environmental conditions and heating loads to ensure the stable indoor heating. The experimental results in Tongliao area show that: in the whole heating season, the system can continuously provide 42.6 ℃ hot water and maintain the indoor temperature between 21.3 ℃ and 24.1 ℃. The average COP is 3.6, which realizes the efficient utilization of solar energy, greatly reduces the consumption of conventional energy, and saves 21 t standard coal. Compared with electric heating, coal-fired boiler heating and gas-fired boiler heating systems, the annual average operation cost can be reduced by 62.2%, 49.1% and 46.2% respectively, and the payback period is 4.7, 9.8 and 10.3 years respectively.