Engine exhaust operated ejector for vehicle air conditioning

الملخص EN

In this work, an ejector system for a typical cooling capacity of 1 kW, that corresponds to a coefficient of performance (COP) of 0.4 using R123 as a working fluid, was designed.

The design procedure was carried out for optimum ratios of condenser to evaporator pressure, and evaporator to generator stagnation temperature.

Preliminary tests of the fabricated ejector were carried out using air as a working fluid and implementing different pressure ratios and mass flow rates for the purpose of optimising the ejector characteristics regarding thermodynamic, heat transfer, and gas-dynamic parameters.

Parallel tests for the heat potential of the engine exhaust were conducted.

Encouraging results were obtained and the technicality of matching the proposed model with the real vehicle is explored.