R401A table

[Acrisoft]

I have doubts about R401A table below:

http://mrmech.com/technical-references/refrigerant-info-and-properties/pressure-temperature-charts-refrigerant/r12-r134a-r401a-r401b

For example: For R12 at -15 degrees celsius I have 11.8PSI in sucction line.

I confuse because the table has 2 columns for the same refrigerant.

So what what be the correct equivalent for R401A, 16 ir 10 PSI ?


Moises

[The Viking]

Moises,

R401a is a Zeotropic blend, the components in it boils off at different temperatures/pressures.

Therefore the pressure will depend on if the refrigerant is in it's liquid phase or in it's gas phase. In your example above where you are looking at a suction line you therefore need to read the vapor pressure.

:cool:

.

[Acrisoft]

Thank you. So, is it correct to calculate the subcooling by the liquid column of the table and superheat by the gas column ?

[The Viking]

Yes.

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