四通换向阀中采用新型材料的节能效果

为了降低四通换向阀传热损失导致的热泵空调系统的性能损失,提出采用低导热系数的阀座材料替代原阀座材料的方案,并结合实验和系统仿真分析了该方案的实际节能效果。研究结果表明:现有典型四通换向阀的传热损失不可忽略;考虑到结构设计和加工工艺等影响因素,采用低导热系数阀座材料是降低四通阀传热损失较为可行的方案;阀座材料导热系数由常见的110 W/(m.K)降为60 W/(m.K)后,四通阀传热损失减小21%,热泵系统COP提高0.4%。

Energy-saving Effect of Using New Material in Reversing Valve

In order to reduce the performance degradation caused by the heat loss of reversing valve in heat pump air conditioning system,a method of substituting lower thermal conductivity valve seat for present commonly used ones was proposed.The energy saving effect of lower thermal conductivity valve seat was analyzed through experiments and simulations.Research results show that,the heat loss of the present commonly used reversing valve can not be ignored;considering the effect factors of structure design and processing technology,it is a feasible method to reduce heat loss by using reversing valve seat with lower thermal conductivity;when thermal conductivity of reversing valve seat decreases from 110 W/(m.K) to 60 W/(m.K),the heat loss of reversing valve decreases by 21%,and the COP of heat pump system increases by 0.4%.