Low temperature air-source heat pump test bed

Develops the test bed, which can simulate the outdoor air environment in severe cold regions. The test bed is composed of heat pump units and simulation system of indoor and outdoor air environment. Based on the basic principle of system error analyses, selects appropriate instruments. The analysis result shows that the temperature difference affects the measurement accuracy more than that the flow rate does. The repeated measurement result shows that the total error of heat capacity and COP is 3.65% and 3.79% respectively, satisfying the error limit demand of test.