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=1/CH2F2/c2-1-3/h1H2
InChIKey RWRIWBAIICGTTQ-UHFFFAOYAC
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] 47.9998938761
Critical point  
Critical point temperature [K] 351.255
Critical point density [kg/m3] 424.00000123
Critical point density [mol/m3] 8150.0846
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