With the improvement of electronics performance

the problem of heat dissipation in circuit and chip is becoming more serious

development of high-efficiency electronics cooling systems is urgently needed

and vapor compression refrigeration is believed to be the most promising one. Based on a miniature vapor compression refrigeration system for electronics cooling

when cooling load is fixed as 101.4 W

the impacts of refrigerant charge and capillary length on the refrigeration system

including system pressure

cooling effects of evaporator

power consumed by compressor and coefficient of performance

are studied through experiments. The results show that the increase of refrigerant charge or reduced capillary length will result in higher evaporation pressure

the surface temperature of heat sinks and the power consumption of the compressor will increase

then the coefficient of performance will decrease. When refrigerant charge is 120 g and capillary length is 3m

the overall performance of the experimental system is optimal

temperature of the two heat sinks can be maintained at about 12 ℃

the power consumed by compressor is 41 W

and COP can reach 2.48.