Optimization Strategies for Integrating an Ejector into a Two-Stage Vapor Compression Refrigeration System

To further investigate how to optimize the coefficient of performance (COP) of a two-stage compression refrigeration system, this paper focuses on process optimization and theoretical calculations for an incomplete intercooling two-stage compression refrigeration cycle using refrigerant R410A. The model established for the ejector system was validated, showing an average calculation error of approximately 6%, indicating good agreement with the simulations. The study compared changes in the COP and ejector coefficient under variations in factors such as subcooling in the intercooler, superheating in the heat exchanger, and intermediate pressure. The ejector coefficient showed a maximum change of 72%, while the COP varied by up to 52%. Additionally, by comparing the refrigeration system with and without the ejector, it was found that the COP could be improved by up to 215%.