What kind of refrigerant is 404A?
What kind of refrigerant is 404A?
Freon™ 404A (R-404A) is a blended hydrofluorocarbon (HFC) refrigerant comprised of R-125, R-134a, and R-143a. It was designed to replace R-502 and R-22 used in commercial refrigerator equipment for low and medium temperature ranges.
What are the important characteristics of a refrigerant?
Physical Properties of Refrigerants
- Low Freezing Point. Refrigerants should have low freezing point than the normal operating conditions.
- Low Condensing Pressure.
- High Evaporator Pressure.
- High Critical Pressure.
- High Vapor Density.
- High Dielectric strength.
- High Latent Heat of Vaporization.
- High Heat Transfer Coefficient.
What is the boiling point of R404A refrigerant?
-46.2
Physical Properties
| Property | Value |
|---|---|
| Chemical Notation | CF3CHF3, CF3CH3, CFcCH2F |
| Molecular Weight | 97.6 |
| Boiling Point (°C) | -46.2 |
| Freezing Point (°C) | Average -117.5 |
What should my superheat be for 404A?
Most heating and cooling systems should operate at a superheat of 10F at the evaporator and between 20F to 25F at the compressor. if your HVAC system has a thermostatic expansion valve (TXV), the subcooling should be between 10F and 18F.
How is R404A used in a refrigeration plant?
Refrigeration plants have two types of GHG emission – from the energy they consume and from refrigerants that leak. R404A has proved to be a convenient “interim” refrigerant, to help us replace the old ozone depleting refrigerants.
When did they start using HFC R-404A refrigerant?
R-404A began seeing usage in 1996 after the phase out of CFC R-502 due to it’s Ozone Depletion Potential. R-404A is a ternary refrigerant blend consisting of the HFC R-125 (forty-four percent), HFC R-143a (fifty-two percent), and HFC R-134a (four percent).
Which is better R-502 or R-404A refrigerant?
R-404A operated at comparable physical and thermodynamic properties that R-502 did which made transitioning to new systems or retrofitting older systems a much easier task. 404A is rated as an A1 from ASHRAE.
What is the GWP on the refrigerant R-404A?
The GWP on R-744 is one. The GWP on R-404A is nearly four-thousand. That number alone is why the world is pushing to get rid of R-404A as fast we can. Out of all of the HFCs R-404A is one of the absolute highest when it comes to GWP.