Selection Skills of Refrigerant Gas

Refrigerant is a working substance that continuously circulates in the refrigeration system and changes its state to achieve refrigeration. The refrigerant absorbs the heat of the cooling medium (water or air, etc.) in the evaporator and vaporizes, and transfers the heat to the surrounding air or water in the condenser to condense.

The choice of refrigerant is a relatively complex technical and economical issue, and many factors need to be considered. The selection should be based on the specific circumstances, and the overall technical analysis.

1. Consider the requirements of environmental protection.

Use refrigerants that comply with national environmental protection regulations.

2. Consider the requirement of cooling temperature.

Depending on the refrigerant temperature and cooling conditions, high temperature (low pressure), medium temperature (medium pressure), and low temperature (high pressure) refrigerants are selected. The standard evaporation temperature of the refrigerant usually selected is 10°C lower than the refrigeration temperature. The choice of refrigerant should also consider the cooling conditions of the refrigeration device, the use environment, etc. The condensing pressure in operation should not exceed the specified value for the safe operating conditions of the compressor. Automobile air conditioners can only use outside air as the cooling medium, and the factors such as temperature, wind speed, solar radiation, thermal radiation, and other factors that affect them change frequently. Its operating conditions determine that it can only use high-temperature (low-pressure) refrigerants. Most use R134a.

3. Consider the nature of the refrigerant.

According to the thermal properties, physical properties, and chemical properties of the refrigerant, those that are non-toxic, non-explosive, and non-combustible are selected; the refrigerant should be selected for good heat transfer, low resistance, and good compatibility with the materials used in the refrigeration system.

4. Consider the type of compressor.

Different refrigeration compressors work differently. Volumetric compressors increase the pressure by reducing the volume of the refrigerant vapor and generally use refrigerants with a large cooling capacity per unit volume, such as R134a, R22, etc. There are many types of refrigerants. With the advancement of science and technology, new refrigerants continue to appear to be suitable for different refrigeration devices.

Henan Fonsum Refrigerant Co., Ltd specializes in the R&D and production of various refrigerant gas. If you are interested in our products, please leave messages online or send an email to fonsum@fonsumrefrigerant.com.