Exergetic analysis of an absorption/compression refrigeration unit based on R124/DMAC mixture for solar cooling

Results of the exergetic analysis indicate that irreversibility of the R124/DMAC system is lower than that of the ammonia/water system by about 5 kW and so is the exergetic efficiency. It is noted from this study that the major gain brought by this new couple is the diminution of the operating temperatures of this type of heat pumps from temperatures going to 120 °C-80 °C and even 60 °C. We retain the advantages of introducing this organic absorbent (DMAC) in the refrigeration production field.