Paper deals with thermodynamic analysis of operation of the system with two-phase vapour-liquid injector as a liquid pump in ejection refrigeration systems. The analysis cover the following fluids: isobutane R600a, butane R600, propane R290, R245fa, R134a, R1234yf, and R1234ze(E). The simple balance model of the injector as well as obtained results were presented and discussed in the paper.
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