In the study

thermal performances of direct contact condensation refrigeration cycle with R290 were analyzed and compared with conventional one stage compression refrigeration cycle with R290. The following conclusions are obtained. The maximum coefficient of performance and minimum condenser heat load of direct contact condensation refrigeration cycle with R290 are obtained at the optimum condensation temperatures of the main cycle. With the increases in the supercooling degree of the supercooled liquid in the main cycle

the optimum condensation temperature of main cycle is increased，the maximum coefficient of performance is reduced

the minimum condenser heat load is increased

and the refrigerant mass flow rate of evaporator is decreased. When compared with conventional one stage compression refrigeration cycle with R290 in the range of evaporating temperature from ﹣15 ℃ to﹣6 ℃

the coefficient of performance of direct contact condensation refrigeration cycle with R290 is increased by 7.5%–14.9%

refrigerant mass flow rate of evaporator in cold room cooling equipment is reduced by 26.5%–36.7%，and condenser heat load is reduced by 1.5%–3.7%. The results indicate that the direct contact condensation refrigeration cycle with R290 is promising.