CFD ANALYSIS FOR OPTIMIZING THE GEOMETRY OF AN R134A EJECTOR IN AN INTEGRATED EJECTOR-VAPOR COMPRESSOR CYCLE

Abstract

The ejector serves as a crucial component in the ejector air conditioning system. Numerous studies indicate that optimizing its geometry can enhance the coefficient of performance (COP) of the ejector cooling cycle. In this study, computational fluid dynamics (CFD) is employed to analyze a R134a ejector utilized in an integrated ejector-vapor compressor cycle. The primary geometric dimensions of the ejector are initially determined based on 1D models. The calculation results demonstrate that the optimal area ratio for the ejector under the experimental conditions (generator temperature of 80°C, evaporator temperature of 15°C, condenser temperature of 34°C) is 8.88, while the optimal ratio between the length and diameter of the constant area ranges from 2.35 to 5.08.