LNEYA Chiller
The Working Principle of Industrial Water-cooled Chiller
- Changes of refrigerants in refrigeration compressors
According to the working principle of the refrigeration compressor of the chiller, when the refrigerant vapor enters the suction port of the compressor from the end of the evaporator, it should be in a saturated vapor state, but this is difficult to achieve. Because there is a one-to-one correspondence between the saturation pressure and saturation temperature of the refrigerant, that is, the higher the pressure, the higher the temperature, and the lower the pressure, the lower the temperature. When the refrigerant vapor is compressed into superheated vapor in the refrigeration compressor of the industrial chiller, the pressure is increased from the evaporating pressure to the condensing pressure. However, because the compression process is completed in an instant, the compression work has been completed when the refrigerant vapor and the outside world are almost too late to exchange heat, so it is called adiabatic compression process. Because the compression of the vapor is achieved by external energy, that is, the external energy does work on the refrigerant, which further increases the temperature of the refrigerant vapor and further superheats the vapor, that is, the temperature of the vapor discharged by the compressor is high. at the condensation temperature. - The change of refrigerant in the condenser
When the superheated vapor enters the condenser of the industrial chiller, under the condition of constant pressure, it first emits a part of the heat to cool the superheated vapor of the refrigerant into saturated vapor, which continues to release heat and condense to produce saturated liquid under isothermal conditions. After the saturated vapor is continuously condensed, the saturated liquid will become more and more, and the saturated vapor will become less and less, and finally all the refrigerant vapor will be condensed into a saturated liquid. At this time, the saturated liquid still maintains the condensing pressure and condensing temperature. - The change of refrigerant in the throttling device
The saturated liquid refrigerant passes through the throttling device in the chiller and is reduced from the condensing pressure to the evaporating pressure. The refrigerant flowing out from the outlet of the throttling device becomes a two-phase mixed state in which liquid accounts for about 80% and gas accounts for about 20%. A small amount of vapour is produced in this case, which is a flash gas that appears as the liquid expands due to a drop in pressure. The heat absorbed during vaporization comes from the refrigerant itself, and there is almost no heat exchange with the outside world, so it is called the adiabatic expansion process. - The change of refrigerant in the evaporator
When the liquid-based two-phase mixed refrigerant flows into the evaporator of the chiller, it absorbs the heat of the cooling medium and continuously vaporizes. With the continuous vaporization of the liquid refrigerant under isobaric and isothermal conditions, the liquid in the mixed state is less and less and the vapor is more and more. When the refrigerant liquid is completely vaporized into saturated vapor, it will flow back to the industrial chiller again. The suction port of the heart-refrigeration compressor is sucked in, compressed, and discharged by the compressor, and enters the next cycle.
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