In this paper, according to the special requirements of the submarine air-conditioning water-chiller unit, the discussion and choice of the enhanced condenser tube have been made, and the experimental study of the heat transfer performance has been conducted.

The condensation temperature and evaporation temperature are variational in condensator and evaporator using R22/R142b non-azeotropic mixture refrigerant.

Through a theoretical analysis the authors have derived a relationship for calculating the mean condensation temperature of a multi-pressure condenser, which has taken into account the variation of heat transfer factor with the change of condenser construction scheme and cooling water inlet temperature.

,air wet-bulb temperature,condensation temperature and relative moisture were conducted.

Discussion of the condensing temperature in the standard of SCREW REFRIGERANT COMPRESSORS;

Some researches in an ice harvester machine are made which indicate that the evaporating temperature is the most significant factor which influence the COP (Coefficient of Performance) of a refrigeration compressor while both the evaporating temperature and the condensing temperature are two main factors.

By use of such refrigerants,the compressor discharging temperature is almost equal to the condensing temperature,and problems relative to high compressor discharging temperature are avoided.