The condensation process of non-azeotropic mixed refrigerant is a isobaric process. Meanwhile

the concentrations of vapor and liquid continuously change. When the outlet temperature of condenser is 300 K

the mass fraction of R600a/R23/R14 in liquid phase mixture is 78.04/12.62/9.34

respectively. The R600a is the dominant component in the liquid mixtures. However

it also contained considerable amounts of middle and low boiling refrigerants. When the condensing temperature is reduced to 280 K

the mass fraction of R600a in vapor is 9.8%. Even if the condensing temperature is decreased to 249.49 K (the bubble point temperature of 35%R600a/35%R23/30%R14)

the mass fraction of R600a in vapor phase still reaches 2.67%. The vapor-liquid equilibrium gravity separation method couldn’t separate mixed refrigerants completely. The separation ratio of R23 by phase separator I and phase separator II are 12.62% and 30.27%

respectively. The rest of the R23 goes into the evaporator. Phase separator I could separate 78.04% of the refrigerant R600a with high boiling point temperature. There are 9.34% R14 (low boiling refrigerant) in liquid phase. The mass fraction of R600a in evaporator still reaches 6.31%

the low boiling refrigerant R14 accounts for 45.64%.