Experimental Study on Air-Source Heat Pump Using Exhaust of Building as Heating Source

Normally, The air-source heat pump (ASHP) can not work well in the serious cold regions of china in winter. In order to study this issue, the experiment system of Air-source Heat Pump using exhaust of building as Heating Source was developed, the system used the surplus energy of exhaust fully, raised the air temperature of ASHP, recovered the energy of exhaust by direct exchange, and heated fresh air of ASHP. Used the enthalpy difference method experiment，that contrasted two conditions of building exhaust only and building exhaust mixed outdoor air. measured the heat quantity，the electricity power，the coefficient of performance (COP) and the recovery efficiency. the technical foundation was established for engineering projects. The experiment result indicated that in the same surroundings and the electricity power, the quantity of heat is increased and the COP averaged 4.26, the top is about 4.45. The recovery efficiency averaged 71%, the top is about 84%.In conclusion, this system had high performance in the aspects of engergy conservation and economy.