Performance evaluation of a solar ejector-vapour compression cycle for cooling application using carbon dioxide as working fluid.

In recent years, CO2 is being revised as a fully environmentally friendly and safe refrigerant. Simulation results show its high system COP. A one-dimensional mathematical model was developed using the equations governing the flow and thermodynamics based on the constant area ejector flow model. The model includes effects of friction at the constant-area mixing chamber. Using the typical meteorological year file containing the weather data of the city of Tunis, the system performance is computed for three collector types.