Ejector-compression systems for cooling: Utilising low grade waste heat

Abstract The ejector-compression system is an attractive means of cooling, using low grade thermal energy in the temperature range of 70–90°C as heat input to the cycle. This energy is available from flat plate solar collectors, waste steam, exhaust from automobiles and flue gases etc. The effects on mass flow ratio of motive vapour to evaporator vapour, condenser heat capacity and coefficient of performance, have been studied as a function of boiler temperature by varying the evaporator and condenser temperatures for promising refrigerants such as R-11 and R-113.