R32¶

References¶

Equation of State¶

R. Tillner-Roth and A. Yokozeki. An international standard equation of state for difluoromethane (R-32) for temperatures from the triple point at 136.34 K to 435 K and pressures up to 70 MPa. J. Phys. Chem. Ref. Data, 26(6):1273–1328, 1997. doi:10.1063/1.556002.

Thermal Conductivity¶

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.

Viscosity¶

Ian H. Bell and Arno Laesecke. Viscosity of refrigerants and other working fluids from residual entropy scaling . In 16th International Refrigeration and Air Conditioning Conference at Purdue, July 11-14, 2016. 2016.

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.

Fluid Information¶

Parameter, Value
General
Molar mass [kg/mol]	0.052024
CAS number	75-10-5
ASHRAE class	A2
Formula	CF₂H₂
Acentric factor	0.2769
InChI	InChI=1S/CH2F2/c2-1-3/h1H2
InChIKey	RWRIWBAIICGTTQ-UHFFFAOYSA-N
SMILES	C(F)F
ChemSpider ID	6105
Limits
Maximum temperature [K]	435.0
Maximum pressure [Pa]	70000000.0
Triple point
Triple point temperature [K]	136.34
Triple point pressure [Pa]	47.999893876059375
Critical point
Critical point temperature [K]	351.25500044943203
Critical point density [kg/m3]	423.99996998830204
Critical point density [mol/m3]	8150.083999467593
Critical point pressure [Pa]	5782645.093949692

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.

Superancillary Plots¶

The following figure shows the accuracy of the superancillary functions relative to extended precision calculations carried out in C++ with the teqp library. The results of the iterative calculations with REFPROP and CoolProp are also shown.

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.