微通道换热器两相分配特性对空调系统性能的影响

The Impact on Air Conditioning System of Two-phase Distribution in Microchannel Heat Exchanger

微通道换热器作为新一代换热器逐渐使用在家电领域,其结霜、除尘、排水、分液等都是目前亟待解决的问题。通过R22家用空调系统的标准性能实验台,对三种流程数不同的微通道换热器用作冷凝器和蒸发器时的温度分布均匀性和其对系统性能的影响进行实验,研究发现,微通道换热器在用作冷凝器和蒸发器时,温度分布不均对系统性能的影响分别达到7.3%和3.5%,并且流程数对于温度分布均匀性的影响在作为冷凝器和蒸发器时是不同的。

Microchannel heat exchanger as a new substitution heat exchanger has been used in the field of home appliances, but the frost, dust, drain and distribution are the problems which need to be solved. The temperature distribution of microchannel heat exchanger and its influence on the air-conditioning system with refrigerant R22 in which three microchannel heat exchangers with different processes are used as condenser and evaporator respectively, is tested in the performance test bench of air-conditioning system. It is shown that the effect of temperature distribution on the system performance is up to 7.3% and 3.5%, respectively for condenser and evaporator. And the number of processes has different impact on the temperature distribution when microchannel heat exchanger is used for condenser and evaporator.