The selection of refrigerants is a relatively complex technical issue, and there are many factors that need to be considered. When we select refrigerants, a comprehensive technical analysis should be carried out according to the specific situation. The following are the matters needing attention when choosing refrigerant.
1. The working temperature and working pressure of the refrigerant should be moderate
Under atmospheric pressure, the evaporating temperature of the refrigerant should be low enough to meet the cooling temperature requirements.
At normal temperature, the refrigerant must have a relatively low condensing pressure, because when the condensing pressure is too high, the structural strength of the sealing performance of the refrigeration system will be high. Generally, the condensing pressure of the refrigerant is required to be: 12×105 ~ 15×105 Pa.
At room temperature, the refrigerant must have a relatively high evaporation pressure, because if the pressure in the evaporator is lower than the atmospheric pressure, the outside air will easily enter the refrigeration system through the gap, which will increase the pressure in the system, reduce the cooling capacity, and increase power consumption. At the same time, moisture in the air will cause ice blockage and other adverse effects in the refrigeration system.
2. The refrigerant must have a relatively large refrigeration capacity per unit volume
The refrigeration equipment of the same specification can obtain a larger refrigeration capacity when the selected refrigerant has a large refrigeration capacity per unit volume.
Under the same working conditions, when the cooling capacity is constant, the unit volume of the refrigerant is large, and the refrigerant volume of the system can be reduced, and the size of the compressor can also be reduced accordingly.
3. The critical temperature of the refrigerant should be high and the freezing point should be low
The critical temperature is high, which is convenient for the refrigerant to condense and become a liquid at ambient temperature; the freezing point is low, and a lower temperature can be obtained, which expands the use temperature range of the refrigerant, reduces throttling loss, and improves the refrigeration coefficient.
4. The viscosity and density of the refrigerant should be as small as possible
The low viscosity and density can make the flow resistance of the refrigerant cycle in the system small, reduce the cycle power consumption, appropriately reduce the pipe diameter, and allow the pipe to have a smaller bending radius (and this is useful for reducing the pressure loss of the evaporator Is very important), it can also reduce the impact of the refrigerator on the valve group in the compressor and prolong the service life of the compressor.
5. The thermal conductivity and heat release coefficient of the refrigerant should be high
The high thermal conductivity and heat release coefficient can appropriately reduce the structure of the heat exchanger in the refrigeration system and improve the heat exchange efficiency of the heat exchanger.
6. Requirements for other aspects of refrigerant
Non-flammable, non-explosive, non-toxic, non-corrosive, affordable, easy to buy, etc.
If a low-quality refrigerant is selected, it will not only cause a poor cooling effect but also may cause corrosion to the refrigeration equipment, so we must consider the above precautions when choosing. If you still have doubts about the choice of refrigerant after reading the above content, you can get a professional solution by contacting us.
As a professional manufacturer of refrigerants and fluoropolymers, we have accumulated rich manufacturing experience in this field. We have a professional production team that strictly implements each link of production in accordance with the standards, and is also equipped with a strict quality inspection system to provide customers with high-quality and safe products. We always put the needs of customers first, and can provide customers with thoughtful one-stop services and develop effective solutions. If you are interested in our refrigerants, please contact us immediately!