Background. Currently, in the cycles of steam-ejector refrigeration machines (SERM) are used monoagent jet compressors, working body which is water. Despite their low efficiency, SERM have a number advantages over that usemechanical compressors: cost, ease manufacture and reliability. The use largely limited by inability these installations to reach temperatures below 0 °C. This limitation can ...

An ejector expansion transcritical CO2 refrigeration cycle is proposed to improve the COP of the basic transcritical CO2 cycle by reducing the expansion process losses. A constant pressure mixing model for the ejector was established to perform the thermodynamic analysis of the ejector expansion transcritical CO2 cycle. The effect of the entrainment ratio and the pressure drop in the receiving ...

The thermodynamic and thermo-economics models for three-pressure absorption-ejector hybrid refrigeration system are set up. The thermo-economical analysis model of the system is considered in two cases of high-temperature heat resources: waste heat resources and natural gas fuel are presented. The performances of the system in two modes of the running hours per year (600h and 1000h) are calcula...