This paper offer an improving method on the disadvantage of ammonia-water absorption refrigeration system: High work pressure brings out some insecurity hide trouble and huge system. The method is that LiBr is added in ammonia-water system to make the work pressure falling. In order to study the feasibility of these work pairs, the equilibrium cell were used to measure thermal property of ternary ammonia-water-lithium bromide mixtures on experiment cell built by self. New pressure-temperature vapor liquid e...