Thermodynamic analysis of transcritical CO2 refrigeration cycle with an ejector

►Transcritical CO2 refrigeration cycle with ejector was analyzed by the laws of thermodynamics. ► The ejector instead of throttling valve reduces more 25% exergy loss and increases COP more 30% in transcritical CO2 refrigeration cycle. ► COP of transcritical CO2 refrigeration cycle with ejector was affected greatly by entrainment ratio of ejector, rejection pressure and outlet temperature of gas cooler. ► Running condition of transcritical CO2 refrigeration cycle with ejector is limited by critical entrainment ratio of the ejector.