Refrigeration system operating conditions
The parameters of the operating conditions of the refrigeration system mainly include evaporation temperature, condensation temperature, suction temperature and supercooling temperature.
u Evaporation temperature:
1) In an indirect cooling system, the evaporation temperature is generally 5 degrees lower than the temperature of the refrigerant water;
2) In the air cooling system, the evaporation temperature of the cold storage is 8 degrees lower than the cold temperature;
u Condensation temperature:
1) The condensation temperature of the water cooling system is 4-6 degrees higher than the cooling water outlet temperature;
2) The condensation temperature of the evaporative condenser is 5-10 degrees higher than the temperature of the summer warm bulb;
3) The condensation temperature using air cooling is 8-12 degrees higher than the air temperature;
u Inspiratory temperature:
In order to prevent the liquid refrigerant from entering the suction side of the compressor, the inhalation temperature is required to be higher than the evaporation temperature, and the temperature difference between the two is called "superheat".
1) Freon system without regenerator, the suction superheat is generally about 5 degrees;
2) The gas system with regenerator has a suction superheat of about 15 degrees.
u Cooling temperature:
The refrigerant before the throttle valve is a supercooled liquid, and its temperature is called the supercooling temperature.
The difference between the condensing temperature and the supercooling temperature is called "subcooling".
The degree of subcooling in the Freon system is generally 3-5 degrees.