# R134a¶

## References¶

### Equation of State¶

Reiner Tillner-Roth and Hans Dieter Baehr. A International Standard Formulation for the Thermodynamic Properties of 1,1,1,2-Tetrafluoroethane (HFC-134a) for Temperatures from 170 K to 455 K and Pressures up to 70 MPa. J. Phys. Chem. Ref. Data, 23:657–729, 1994. doi:10.1063/1.555958.

### Thermal Conductivity¶

Mark O. McLinden, Sanford A. Klein, and Richard A. Perkins. An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures. Int. J. Refrig., 23:43–63, 2000. doi:10.1016/S0140-7007(99)00024-9.

### Viscosity¶

Marcia L. Huber, Arno Laesecke, and Richard A. Perkins. Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a. Ind. Eng. Chem. Res., 42:3163–3178, 2003. doi:10.1021/ie0300880.

### Surface Tension¶

A. Mulero, I. Cachadiña, and M. I. Parra. Recommended Correlations for the Surface Tension of Common Fluids. J. Phys. Chem. Ref. Data, 41(4):043105–1:13, 2012. doi:10.1063/1.4768782.

## Aliases¶

R134A

## Fluid Information¶

Parameter, Value
General
Molar mass [kg/mol] 0.102032
CAS number 811-97-2
ASHRAE class A1
Formula $$C_{2}F_{4}H_{2}$$
Acentric factor 0.32684
InChI InChI=1/C2H2F4/c3-1-2(4,5)6/h1H2
InChIKey LVGUZGTVOIAKKC-UHFFFAOYAU
SMILES C(C(F)(F)F)F
ChemSpider ID 12577
2D image
Limits
Maximum temperature [K] 455.0
Maximum pressure [Pa] 70000000.0
Triple point
Triple point temperature [K] 169.85
Triple point pressure [Pa] 389.563788562
Critical point
Critical point temperature [K] 374.21
Critical point density [kg/m3] 511.899951696
Critical point density [mol/m3] 5017.053
Critical point pressure [Pa] 4059280.0
Reducing point
Reducing point temperature [K] 374.18
Reducing point density [mol/m3] 4978.830171

## REFPROP Validation Data¶

Note

This figure compares the results generated from CoolProp and those generated from REFPROP. They are all results obtained in the form $$Y(T,\rho)$$, where $$Y$$ is the parameter of interest and which for all EOS is a direct evaluation of the EOS

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.

## Consistency Plots¶

The following figure shows all the flash routines that are available for this fluid. A red + is a failure of the flash routine, a black dot is a success. Hopefully you will only see black dots. The red curve is the maximum temperature curve, and the blue curve is the melting line if one is available for the fluid.

In this figure, we start off with a state point given by T,P and then we calculate each of the other possible output pairs in turn, and then try to re-calculate T,P from the new input pair. If we don’t arrive back at the original T,P values, there is a problem in the flash routine in CoolProp. For more information on how these figures were generated, see CoolProp.Plots.ConsistencyPlots

Note

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.