D4

References

Equation of State

Monika Thol. Empirical Multiparameter Equations of State Based on Molecular Simulation and Hybrid Data Sets. PhD thesis, Ruhr-Universität Bochum, 2015.

Surface Tension

A. Mulero and I. Cachadiña. Recommended Correlations for the Surface Tension of Several Fluids Included in the REFPROP Program. J. Phys. Chem. Ref. Data, 43:023104–1:8, 2014. doi:10.1063/1.4878755.

Aliases

Octamethylcyclotetrasiloxane, OCTAMETHYLCYCLOTETRASILOXANE

Fluid Information

Parameter, Value

General

Molar mass [kg/mol]

0.29661576

CAS number

556-67-2

ASHRAE class

UNKNOWN

Formula

\(C_{8}H_{24}O_{4}Si_{4}\)

Acentric factor

0.5981248267987835

InChI

InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3

InChIKey

HMMGMWAXVFQUOA-UHFFFAOYSA-N

SMILES

C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C

ChemSpider ID

10696

2D image

 http://www.chemspider.com/ImagesHandler.ashx?id=10696

Limits

Maximum temperature [K]

1200.0

Maximum pressure [Pa]

180000000.0

Triple point

Triple point temperature [K]

290.25

Triple point pressure [Pa]

73.06609963813099

Critical point

Critical point temperature [K]

586.5

Critical point density [kg/m3]

309.37023768

Critical point density [mol/m3]

1043.0

Critical point pressure [Pa]

1347215.3560904593

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/D4.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/D41.png