한국기계기술학회지 제24권 제5호 (p.893-898)

멀티 히트펌프의 냉방저온 운전특성에 대한 실험적 연구

Experimental Study on Operating Characteristics for Cooling Low Temperature Condition of Multi-H/P
키워드 :
Compressor(압축기),Cooling low temperature(냉방저온),Electronic expansion valve(전자팽창밸브),Frequency(주파수),Multi-heat pump(멀티 히트펌프)

초록

In the present study, the experimental study was conducted using a multi-calorie meter, to investigate the cooling performance and cycle operation changes of the multi-heat pump (3 indoor units) for the low outside temperature in summer. The test temperature condition was the low cooling temperature, and the normal performance and dynamic behavior of 3 rooms, 2 rooms, and 1 room were measured to understand the operating characteristics of seven 7 indoor unit combinations. As a result of the experiment, the cooling capacity and COP of the multi-heat pump at low cooling temperature were about 10% and 6% higher than those of the cooling standard temperature. In addition, the dynamic behavior of the indoor units of 3 and 2 rooms was observed differently due to the load difference according to the indoor unit combinations and the non-uniformity of the refrigerant amount. And, when starting the heat pump, the compressor had a maximum peak value and stabilized by repeating the decrease and increase for each indoor unit combination.