30 May 2005

EXPERIMENTAL STUDY ON HEAT PUMP CYCLE OF FLASH-TANK ECONOMIZER WITH SCROLL COMPRESSOR


The heat pump system with flash-tank coupled with scroll compressor is presented, and is
compared with the system with sub-cooler in component and characteristic. The heat pump prototype has
comprehensively experimented and its behavior has analyzed by the measured data. It is found that the
heating capacity of the prototype decreases when the evaporation temperature becomes low, but the
decrement is much slower than that of conventional air-source heat pump, and that the power input varies
slightly with the evaporation temperature. The heat pump system with flash-tank can improve its
performances more efficiently than the system with sub-cooler can under the conditions of low ambient
temperature, so it has broad prospects to be used in air-source heat pump with small capacity.