Comparison of R134a and R516A’s performance at Different Air Velocities in Two Evaporator Ejector Cooling System

This study aims experimentally to investigate the performance parameters of R134a and alternative R516A refrigerant in two evaporator ejector cooling system (DEES) at different air velocities evaporator#1. Firstly, tests were carried out with under steady-state conditions then repeated low GWP refrigerant. As R134a, higher capacity was achieved velocity values. When value 1.1, 1.7, 2.2, 2.7 m s-1, COP obtained from 1%, 2%, 5%, 4% than R516A, respectively. Additionally, test results illustrate that contributed increasing parameters, however 2.2 s-1 had a slight effect. The concluded values are slightly lower can be alternatively used as vapor compression refrigeration (VCR) systems.