Changes in refrigerant in air-cooled water chillers

refrigerant is itself a cycle in the refrigeration system, and the change of state of by itself to achieve refrigeration. Refrigerant in the evaporator absorbed by cooling medium heat and vaporization, heat transfer to the surrounding air or water in the condenser and condensation. When the mechanism of cold air cooled cold water cycle system run time, also cannot leave the refrigerant. Refrigerant is constant flow in the air-cooled chiller system, its status is also in constant change, therefore, refrigerant in the mechanism of cold air cooled cold water circulation system state of every position is different. So, refrigerants in air cooled chiller, what kind of effect?

1, the mechanism of cold compressor refrigerants in air cooled cold water change

refrigerant from the end of the air-cooled chiller evaporator into the compressor suction mouth, and complete the refrigerant vapor in the refrigeration compressor compressed into a process of superheated steam, pressure is also made by evaporating pressure to the condensing pressure. Because of the compressor compression process is instantaneous, so at this time of the refrigerant vapor would not happen heat exchange with the outside world, we called the adiabatic compression process.

2, refrigerant in the air-cooled chiller condenser change

to overheat steam into the air cooled condenser, cold water machine due to the stress condition did not change, so will send out a part of the heat, the refrigerant overheating steam cooling into saturated vapor. Because this time is still under isothermal condition, the saturated vapor will continue to emit heat, condensation and constantly produce saturated liquid. Saturated liquid condensation, the longer will be, the more saturated vapor will be reduced, the end result is: all refrigerant vapor condensation of saturated liquid.

3, refrigerant in the air-cooled chiller throttling element change

due to all have become saturated liquid refrigerant, so when the saturated liquid refrigerant flowing through the throttling element of air-cooled chiller, will by condensing pressure drop to evaporation pressure, temperature by condensing temperature drop to evaporation temperature. By throttling element out refrigerant into liquid accounts for about 80%, gas accounts for about 20% of the two-phase hybrid state, which the production of a small amount of steam, is due to the pressure drop of liquid expansion and appear flash gas.

4, refrigerant in the air-cooled chiller evaporator changes

when the refrigerant into the air-cooled chiller in the evaporator, because through the cooling medium to absorb heat and evaporating, refrigerant evaporation under the condition of constant temperature was continuously, thus make less liquid, steam is more and more. When the refrigerant liquid vaporization becomes saturated vapor, all will return to the air-cooled chiller compressor suction, recycle the above changes.

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