Refrigerants Used In Cooling System
What Are The Required Properties Of Refrigerants?
During evaporation, liquids draw heat from the surrounding environment, which results in a decrease in the temperature of the heat absorbed medium as a result of the evaporation of liquid from the environment. As a result of this process, the reduction of temperature is called cooling. Previously, ammonia and carbon dioxide were used in cooling systems. Nowadays, Freon is generally used in cooling systems.
- Be able to work with low powers.
- Compressors using refrigerants do not always operate at high power ratings.
- The costs must be low.
- Since it is the material used in cooling systems, it is advantageous to have low budget.
- It should be easily available.
- Easy accessibility in case of sudden breakdowns will provide positive results for problem solving.
- It should not corrode the pipe or system through which it passes.
- Such a reason leads to a failure of the cooling system.
- Evaporation temperature should be low.
- Refrigerants with low evaporation temperatures provide the best cooling efficiency.
- Be able to evaporate and liquefy under applicable pressures.
- It is important to ensure the continuity of the system.
- Should not react on contact with metal surfaces.
- Reaction is undesirable as it will cause corrosion on surfaces.
Cooling Fluids Used in Freon Cooling Systems
|R401A||R401A is a zeotropic mixture of R22, R124 and R152a (52/33/15% by weight respectively) which is considered an alternative to R12. Since it contains HCFC, it is not a final alternative and can be used until 2030.|
|R402A||R402A is a zeotropic mixture of R22, R125 and R290 (38/60/2% by weight respectively), which is considered an alternative for R502. Since it contains HCFC, it is not a final alternative and can be used until 2030.|
|R404A||R404A is a zeotropic mixture of R125, R134a and R143a (44/4/52% by weight respectively), which is considered an alternative for R502. Since it contains HCFC, it is not a final alternative and can be used until 2030.|
|R410A||R410A is a near azeotropic mixture of R32 and R125 (50/50% by weight) which is considered an alternative to R22. Theoretical thermodynamic properties are not as good as R22. However, the heat transfer property is quite good. R22 - R410A conversion system needs to be redesigned.|
|R500||R500 is an azeotropic mixture of R500, R12 and R152a. The mixing ratio was 73.9% by weight R12, 26.2% by weight R152a. It is used as an alternative to low R12. It has a better COP value than R12 and 10 - 15% higher volumetric cooling capacity.|
|R502||R502 is an azeotropic mixture of R502, R22 and R115. The mixing ratio is 48.8 wt.% R22, 51.2 wt.% R115. It is mostly used in cold transportation and commercial refrigerators. Since it contains CFC, it has stopped production. It has high volumetric cooling capacity at low temperatures.|
|R507||R507 is an accepted alternative to R502 consisting of R507, R125 and R134a (50/50% by weight).|
Tags: Technical Information