Based on available formulas for cold exergy and exergy loss

exergy analysis was performed for a laboratory-scale vacuum evaporation system to produce ice slurry.By using EES software

calculations were carried out for the mixing of cold water and icy water in the system

spray and evaporation in the vacuum chamber

vapor condensation in the water trap

and saline coolant production with a chiller.The exergy losses and exergy efficiencies were obtained for the three of them and the whole system.The results show that the spray and evaporation in the vacuum chamber has the highest exergy efficiency and the vapor condensation in the water trap has lower efficiency. The lowest exergy efficiency and largest exergy losses occur in the saline production with a chiller

resulting in lower efficiency of the whole system.In order to improve the exergy efficiency of the system

the saline coolant production with a chiller should be optimized or to be replaced by other means.