What are the thermodynamic properties of refrigerants?

What are the thermodynamic properties of refrigerants?

Reliable thermodynamic properties of refrigerants such as pressure, temperature, specific volume, enthalpy and entropy, are required for refrigeration equipment selection and design.

What is the boiling point of R404A refrigerant?

-46.2
Physical Properties

What is hp62 refrigerant?

R-404A is a near ozeotropic blend of R-125, R-143a and R-134a refrigerants. R-404A is a non-ozone depleting replacement most closely matched to the properties of CFC-502 refrigerant.

How are thermodynamic properties classified?

Thermodynamic properties are divided into two broad types: intensive properties and extensive properties. An extensive property is any property that depends on the size (or extent) of the system under consideration. Volume is an example.

Why work is not a thermodynamic property?

Work and heat are not thermodynamic properties, but rather process quantities: flows of energy across a system boundary. Systems do not contain work, but can perform work, and likewise, in formal thermodynamics, systems do not contain heat, but can transfer heat.

Is R-404A illegal?

The commonly-used high GWP refrigerants R404A and R507A are also included in a list of 24 refrigerants which will be deemed unacceptable for use in new retail food refrigeration (refrigerated food processing and dispensing equipment) from January 1, 2021.

Can R-404A still be used?

While virgin R404A can no longer be used in new equipment, recovered or reclaimed R404A can be used until the end of 2030. After that point, all replacement R404A will be banned.

What should superheat be for 404A?

System Specifications It is an R-404A system. With an evaporator temperature of -13 degrees and the system having 40 degrees compressor superheat, the temperature of the refrigerant coming into the compressor would be 27 degrees (-13 degrees plus 40 degrees).

Is R-404A heavier than air?

The vapors are heavier than air and can cause asphyxiation by the displacement of air. Contact with the liquid can cause frostbite. Prolonged exposure to fire or intense heat may cause the containers to rupture violently and rocket.

Can you mix 404A and 134a?

Thread: Accidentally mixed R404A with R134a Vacuum is not necessary because R404a consists of R134a. It will never work and your TEV or capillary is not designed for this refrigerant. If you want to destroy your compressor, let it run this way.

Is R404A refrigerant still available?

Commonly-used high GWP refrigerants R404A and R507A are among a number of refrigerants to be banned in new retail food refrigeration from as early as January 1, 2021, with both also being banned in new cold storage warehouses from January 1, 2023.

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.

What happens if you mix R-404A with air?

Note that if 404A is pressurized after being mixed with air the chance of flammability increases. You should never mix 404A with air under. R-404A is heavier then air and will displace oxygen in a room if a large enough quantity is leaked.

Why was the CFC R-502 replaced by the 404a?

404A was originally implemented as a replacement option for the now banned CFC R-502. R-502 was widely used throughout all of the applications we mentioned above until 1995/1996 when it was phased out entirely due to it’s Ozone Depletion Potential (ODP).