PERFORMANCES OF THE COMPRESSOR REFRIGERATING MACHINESWITH TWO-PHASE EJECTORS

摘要

A new concept of energy recovery in the compressor refrigerating machines is presented, in whichrntwo-phase ejector device is introduced. Energy recovery of the high pressure and high temperaturernliquid refrigerant is achieved in the two-phase ejector, and the energy is used for pre-compressing ofrnthe vapor refrigerant existing the evaporator, before the compressor.rnAn analysis of the thermodynamic and gasdynamic parameters and performance characteristics ofrnthe ejector device, as well as innovated thermal system is realised using the calculating andrnoptimizing procedures presented in the paper. The degree of improvement of the refrigeratingrnmachines efficiency depends on their design and operating conditions as well as on thernthermodynamic properties of the refrigerant. The characteristics of the ammonia refrigerating cyclernwith two-phase ejector are analysed.