Application of Two Stage Ejector Cooling System in a Bus

The aim of this paper is to investigate the feasibility of implementing a two stage ejector cooling system in a bus. The system uses water as the working fluid and a generator in which operates in the temperature range of 100-200 °C. This system has a condensing temperature of 54 °C and an evaporating temperature of 5 °C. The results indicate that the application of a two stage ejector cooling system to replace the vapor compression system in a bus is a suitable alternative. The expected advantages of the proposed system are reduced fuel consumption, reduced green house gas emissions, less demand for power from the engine, a higher COP than that of the single stage ejector cooling system, and especially, resolving the problem of a high condensing temperature for the ejector cooling system in a bus.