Numerical Investigation Of A Refrigerant Ejector: Effect Of Ejector Geometry

Abstract

Ejectors have gained extensive utilization in refrigeration and air-conditioning systems recently, due to their simple design, minimal maintenance, and diminished expansion losses. The ejector performance is markedly sensitive to geometric configurations and refrigerant characteristics. The current study presents a numerical investigation into the performance of a two-phase ejector by varying the geometrical parameters. Computational Fluid Dynamics (CFD) analysis was carried out to examine the flow dynamics within the ejector and its performance under a predetermined set of operational conditions. Parametric values from previously published scholarly works were employed and modified in the present investigation with the objective of enhancing the overall ejector performance. The primary nozzle convergence and divergence angles, as well as the secondary nozzle convergence and divergence angles, were altered, and their impact on flow and overall efficiency was evaluated. This numerical inquiry furnishes significant insights for ejector design and its performance. The findings will further augment the advancement of more sustainable and energy-efficient refrigeration systems.