Trouble with hfc134a data

[op]

Hi users,

Attempting to plot lab data for hfc134a refrigeration cycles, but the database seems to be wrong. This is what I used to assess this. Am i doing something wrong here? Using python version.

import cantera as ct

ref = ct.Hfc134a()

ref.TQ=(273.15, 1)
print(ref.enthalpy_mass/1000)

This should print the specific enthalpy for hfc134a at the saturated vapor state at 0 degrees C (398.8 kJ/kg, source = https://www.freon.com/en/-/media/files/freon/freon-134a-si-thermodynamic-properties.pdf), but instead returns 198.4 kJ/kg.

Any advice would be appreciated

Thanks

[Andrius Ambrutis]

Hello,

I think if you will write ref() it should give entire list with parameters in that mechanism, maybe that parameter got another name.

[Ingmar Schoegl]

In thermodynamics, reference states are arbitrary, as they are eliminated once you calculate a difference of related properties. That means that it is not unusual to see discrepancies in tabulated data. For additional details on Cantera’s implementation, please refer to the documentation and the citation provided therein https://cantera.org/documentation/docs-3.0/doxygen/html/df/df3/classtpx_1_1HFC134a.html