Studies on an Ejector-Absorption Refrigeration Cycle with New Working Fluid Pairs

The Ejector-Absorption Refrigeration System (EARS) combines the advantages of conventional absorption system and ejector refrigeration system. This paper makes a comparative study of EARS operating on new working fluid pairs such as R124 -DMAC, R134a-DMAC and R32-DMAC. Results show that R124-DMAC and R134a-DMAC give good performance at low values of generator and evaporator temperatures. R32- DMAC has drawbacks such as high generator pressures and high circulation ratios. Since R124 is a HCFC and has to be phased out in the near future, R134a-DMAC may be the preferred working pair for low heat source temperature applications.