The thermodynamic properties of refrigerants meet the requirements of refrigeration cycle,
   The refrigerant has a larger range of refrigeration work: critical point refrigerants must be high, easy to use general cooling water or air cooling chiller condensing; low pressure alarm agent solidification temperature should be low, so that they can get the evaporation temperature is low, increasing the scope of work of the refrigeration cycle;
    Refrigerant with appropriate working pressure and compression ratio: the first choice of refrigerant should consider the use of refrigerant temperature range. When the evaporation temperature and condensation temperature are given in time, different refrigerants are used in the refrigeration system.
    The refrigerant has a high unit volume refrigeration capacity: the refrigerant capacity per unit volume directly affects the size of the chiller. The larger the capacity of the unit capacity, the requirement to produce a certain amount of refrigeration, the smaller the volume of refrigerant circulation, which can reduce the size of the compressor.
    The refrigerant has a lower adiabatic index: the smaller the refrigerant adiabatic index, the lower the compressor exhaust temperature, not only conducive to improve the volumetric efficiency of the compressor, but also for the compressor lubrication is also good.
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