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

\(CF_{2}H_{2}\)

Acentric factor

0.2769

InChI

InChI=1S/CH2F2/c2-1-3/h1H2

InChIKey

RWRIWBAIICGTTQ-UHFFFAOYSA-N

SMILES

C(F)F

ChemSpider ID

6105

2D image

http://www.chemspider.com/ImagesHandler.ashx?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]

351.255

Critical point density [kg/m3]

424.00000123039996

Critical point density [mol/m3]

8150.084599999999

Critical point pressure [Pa]

5782000.0

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.

../../_images/R32.png

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.

../../_images/R321.png