Argon

References

Equation of State

Ch. Tegeler, R. Span, and W. Wagner. A New Equation of State for Argon Covering the Fluid Region for Temperatures From the Melting Line to 700 K at Pressures up to 1000 MPa. J. Phys. Chem. Ref. Data, 28:779–850, 1999. doi:10.1063/1.556037.

Thermal Conductivity

E. W. Lemmon and R. T Jacobsen. Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. Int. J. Thermophys., 25(1):21–69, 2004. doi:10.1023/B:IJOT.0000022327.04529.f3.

Viscosity

E. W. Lemmon and R. T Jacobsen. Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. Int. J. Thermophys., 25(1):21–69, 2004. doi:10.1023/B:IJOT.0000022327.04529.f3.

Melting Line

Ch. Tegeler, R. Span, and W. Wagner. A New Equation of State for Argon Covering the Fluid Region for Temperatures From the Melting Line to 700 K at Pressures up to 1000 MPa. J. Phys. Chem. Ref. Data, 28:779–850, 1999. doi:10.1063/1.556037.

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

argon, ARGON, R740, Ar

Fluid Information

Parameter, Value  
General  
Molar mass [kg/mol] 0.039948
CAS number 7440-37-1
ASHRAE class A1
Formula \(Ar\)
Acentric factor -0.00219
InChI InChI=1/Ar
InChIKey XKRFYHLGVUSROY-UHFFFAOYAW
SMILES [Ar]
ChemSpider ID 22407
2D image http://www.chemspider.com/ImagesHandler.ashx?id=22407
Limits  
Maximum temperature [K] 2000.0
Maximum pressure [Pa] 1000000000.0
Triple point  
Triple point temperature [K] 83.806
Triple point pressure [Pa] 68892.4770798
Critical point  
Critical point temperature [K] 150.687
Critical point density [kg/m3] 535.6
Critical point density [mol/m3] 13407.4296586
Critical point pressure [Pa] 4863000.0
   

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/Argon.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/Argon1.png