四管热泵热回收型空调系统及其能耗分析

Four pipe heat pump air conditioning system with heat recovery and its energy efficiency

简要介绍了四管热泵热回收型空调系统的构造和运行，给出了用于评价整个系统综合性能的系统能效比的定义，分析了系统全年能效比随建筑冷热负荷比Ｋ的变化规律，指出在一定的Ｋ值范围内，四管热泵系统既能够满足不同用户的冷热需求，又能实现节能运行，能效比高于通常的双管热泵系统。

Briefly describes the configuration and operation of the system, defines a system EER(Energy Efficiency Ratio) for indicating the performance of the system as a whole, studies its variation with the cooling/heating load ratio for the building in question, and concludes that the four pipe system has a higher EER than that of conventional two pipe systems whilst satisfactorily meeting the requirements of users for heating and cooling.