How to Choose Refrigerant?

When choosing refrigerants, many factors need to be considered to ensure the performance, safety, environmental protection and economy of the refrigeration system. Here are some key factors:

Excellent refrigeration performance: the refrigerant itself must have good refrigeration performance parameters, such as high refrigeration capacity, to meet the refrigeration needs under different working conditions.

High safety: The safety of refrigerants is directly related to the reliability of use, and it is necessary to consider the range of combustion and explosion parameters, toxicity level, and the safety of leak detection, storage and transportation.

Environmental protection: Choose refrigerants that have no damage to the ozone layer and low global warming potential, and avoid the use of early CFC and HCFC refrigerants.

Price economic and practical: consider the market price and source of refrigerant is stable, the cost is reasonable, to ensure economic practicality.

Good compatibility with materials: The refrigerant should be compatible with common equipment materials such as steel, copper, aluminum, plastic, etc., without corrosion reaction, and ensure system life.

Wide range of thermal physical property parameters: A wide range of thermal physical property parameters is conducive to the application of different working conditions, such as a wide boiling point range, suitable for both low temperature and room temperature.

Stability and life: The refrigerant needs sufficient chemical stability in normal use and storage to avoid decomposition and ensure a long enough service life.

Environmental acceptability: Considering ODP (ozone layer destruction potential) and GWP (global warming potential), choose refrigerants that do not damage the atmospheric environment.

The thermodynamic properties meet the requirements of use: including suitable pressure and pressure ratio in the working temperature range, large unit cooling capacity and unit volume cooling capacity, small specific work and unit volume compression work, high cycle efficiency, and the end temperature of isentropic compression is not too high.

In terms of migration properties, viscosity and density are as small as possible to reduce the flow resistance of refrigerant in the system and the amount of refrigerant charged; Large thermal conductivity, improve the heat transfer coefficient of heat exchange equipment, reduce the heat transfer area.

Physical and chemical properties: non-toxic, non-burning, non-explosion, safe to use; Good chemical and thermal stability; No damage to the atmospheric environment.

The source of raw materials is sufficient, the manufacturing process is simple, and the price is cheap: ensure the supply of refrigerants is stable and the cost is low.

To sum up, the selection of refrigerants needs to consider performance, safety, environmental protection, economic and other factors, according to the specific application scenarios and requirements.