Accordingly to the properties of zeotropic mixture R32/R236fa

a novel double-temperature chilling unit is proposed which can be used in the temperature and humidity independent control air conditioning system (THICS)

the unit can produce two different temperature of chilled water (such as low temperature is 7℃ and high temperature is 16℃). An experimental system is established to test the performance of the unit. The results show that at inlet water temperature of the condenser of 32℃ and inlet water temperature of the evaporator of 7℃ and 16℃

the coefficient of performance (COP) of the system can reach 3.92 when the mass component ratio of R32 is 60%. But under mass fractions of R32 of 50%

the combination properties of the system is the best and COP is higher than 3.55 in different operation condition. The results of this study provides the experimental foundation for the application of large temperature glide zeotropic mixture used in the double-temperature chilling water unit.