Water

References

Equation of State

W. Wagner and A. Pruβ. The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use. J. Phys. Chem. Ref. Data, 31:387–535, 2002. doi:10.1063/1.1461829.

Thermal Conductivity

M. L. Huber, R. A. Perkins, D. G. Friend, J. V. Sengers, M. J. Assael, I. N. Metaxa, K. Miyagawa, R. Hellmann, and E. Vogel. New International Formulation for the Thermal Conductivity of H2O. J. Phys. Chem. Ref. Data, 41(3):033102–1:23, 2012. doi:10.1063/1.4738955.

Viscosity

M.L. Huber, R.A. Perkins, A. Laesecke, D.G. Friend, J.V. Sengers, M.J Assael, I.M. Metaxa, E. Vogel, R. Mareš, and K. Miyagawa. New International Formulation for the Viscosity of H2O. J. Phys. Chem. Ref. Data, 38(2):101–125, 2009. doi:10.1063/1.3088050.

Melting Line

IAPWS. 2011 Revised Release on the Pressure along the Melting and Sublimation Curves of Ordinary Water Substance. 2011.

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

water, WATER, H2O, h2o, R718

Fluid Information

Parameter, Value  
General  
Molar mass [kg/mol] 0.018015268
CAS number 7732-18-5
ASHRAE class A1
Formula \(H_{2}O\)
Acentric factor 0.3442920843
InChI InChI=1/H2O/h1H2
InChIKey XLYOFNOQVPJJNP-UHFFFAOYAF
SMILES O
ChemSpider ID 937
2D image http://www.chemspider.com/ImagesHandler.ashx?id=937
Limits  
Maximum temperature [K] 2000.0
Maximum pressure [Pa] 1000000000.0
Triple point  
Triple point temperature [K] 273.16
Triple point pressure [Pa] 611.654800897
Critical point  
Critical point temperature [K] 647.096
Critical point density [kg/m3] 322.0
Critical point density [mol/m3] 17873.7279956
Critical point pressure [Pa] 22064000.0
   

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/Water.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/Water1.png