MD4M#

References#

Equation of State#

M. Thol, M.A. Javed, E. Baumhoegger, R. Span, and J. Vrabec. Thermodynamic properties of dodecamethylpentasiloxane, tetradecamethylhexasiloxane, and decamethylcyclopentasiloxane. Fluid Phase Equilib., 2019.

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#

Tetradecamethylhexasiloxane, TETRADECAMETHYLHEXASILOXANE

Molecular Structure#

MD4M — 3D conformer (interactive: click and drag to rotate)

Fluid Information#

Parameter, Value

General

Molar mass [kg/mol]

0.45899328

CAS number

107-52-8

ASHRAE class

Formula

C14H42O5Si6

Acentric factor

0.800062145272709

InChI

InChI=1S/C14H42O5Si6/c1-20(2,3)15-22(7,8)17-24(11,12)19-25(13,14)18-23(9,10)16-21(4,5)6/h1-14H3

InChIKey

ADANNTOYRVPQLJ-UHFFFAOYSA-N

SMILES

C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

ChemSpider ID

7587

Limits

Maximum temperature [K]

655.0

Maximum pressure [Pa]

125000000.0

Triple point

Triple point temperature [K]

214.15

Triple point pressure [Pa]

\(6.91963303276842\times 10^{-07}\)

Critical point

Critical point temperature [K]

653.199999427594

Critical point density [kg/m3]

261.6262734506566

Critical point density [mol/m3]

570.0002262574662

Critical point pressure [Pa]

828558.7151384281

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/MD4M.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/MD4M1.png

Flash consistency (HEOS): 161 inconsistent, 0 exceptions, 0 bad-phase across 9 input pair(s).

Download full failure list (CSV)

Failing state points (sample, up to 20 per pair/class)

Pair

Class

Region

P [Pa]

T [K]

In1

Val1

In2

Val2

Error

DmolarHmolar

INCONSISTENT

1phase

4.69514e-05

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

2.02395e-05

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

8.72471e-06

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

3.76099e-06

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

4.69514e-05

226.526

Dmolar

2084

Hmolar

-264452

DmolarHmolar

INCONSISTENT

1phase

1.62126e-06

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

2.02395e-05

226.526

Dmolar

2084

Hmolar

-264452

DmolarHmolar

INCONSISTENT

1phase

0.000252666

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

0.000252666

226.526

Dmolar

2084

Hmolar

-264452

DmolarHmolar

INCONSISTENT

1phase

0.000252666

237.801

Dmolar

2059.65

Hmolar

-256627

DmolarHmolar

INCONSISTENT

1phase

0.000108917

215.25

Dmolar

2108.57

Hmolar

-272058

DmolarHmolar

INCONSISTENT

1phase

0.0013597

226.526

Dmolar

2084

Hmolar

-264452

DmolarP

INCONSISTENT

1phase

0.0913458

215.25

Dmolar

2108.57

P

0.0913458

DmolarP

INCONSISTENT

1phase

0.0013597

249.077

Dmolar

2035.48

P

0.0013597

DmolarP

INCONSISTENT

1phase

1.62126e-06

215.25

Dmolar

2108.57

P

1.62126e-06

DmolarP

INCONSISTENT

1phase

8.72471e-06

215.25

Dmolar

2108.57

P

8.72471e-06

DmolarP

INCONSISTENT

1phase

0.000252666

237.801

Dmolar

2059.65

P

0.000252666

DmolarP

INCONSISTENT

1phase

0.000586132

226.526

Dmolar

2084

P

0.000586132

DmolarP

INCONSISTENT

1phase

0.000586132

237.801

Dmolar

2059.65

P

0.000586132

DmolarP

INCONSISTENT

1phase

0.000252666

215.25

Dmolar

2108.57

P

0.000252666

DmolarP

INCONSISTENT

1phase

0.00315423

226.526

Dmolar

2084

P

0.00315423

DmolarP

INCONSISTENT

1phase

0.00731715

226.526

Dmolar

2084

P

0.00731715

DmolarP

INCONSISTENT

1phase

0.0169743

215.25

Dmolar

2108.57

P

0.0169743

DmolarP

INCONSISTENT

1phase

0.00731715

260.353

Dmolar

2011.45

P

0.00731715

DmolarP

INCONSISTENT

1phase

0.0013597

215.25

Dmolar

2108.57

P

0.0013597

DmolarP

INCONSISTENT

1phase

0.0013597

237.801

Dmolar

2059.65

P

0.0013597

DmolarP

INCONSISTENT

1phase

0.491571

294.179

Dmolar

1939.93

P

0.491571

DmolarP

INCONSISTENT

1phase

0.211903

282.904

Dmolar

1963.7

P

0.211903

DmolarP

INCONSISTENT

1phase

0.0393767

271.628

Dmolar

1987.53

P

0.0393767

DmolarP

INCONSISTENT

1phase

0.0913458

271.628

Dmolar

1987.53

P

0.0913458

DmolarP

INCONSISTENT

1phase

0.0169743

260.353

Dmolar

2011.45

P

0.0169743

DmolarP

INCONSISTENT

1phase

0.0393767

260.353

Dmolar

2011.45

P

0.0393767

DmolarSmolar

INCONSISTENT

1phase

0.000108917

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

4.69514e-05

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

2.02395e-05

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

8.72471e-06

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

0.000108917

226.526

Dmolar

2084

Smolar

-719.26

DmolarSmolar

INCONSISTENT

1phase

3.76099e-06

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

4.69514e-05

226.526

Dmolar

2084

Smolar

-719.26

DmolarSmolar

INCONSISTENT

1phase

0.000252666

237.801

Dmolar

2059.65

Smolar

-685.555

DmolarSmolar

INCONSISTENT

1phase

1.62126e-06

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

2.02395e-05

226.526

Dmolar

2084

Smolar

-719.26

DmolarSmolar

INCONSISTENT

1phase

0.000252666

226.526

Dmolar

2084

Smolar

-719.26

DmolarSmolar

INCONSISTENT

1phase

0.000252666

215.25

Dmolar

2108.57

Smolar

-753.697

DmolarSmolar

INCONSISTENT

1phase

0.0013597

226.526

Dmolar

2084

Smolar

-719.26

DmolarT

INCONSISTENT

1phase

1.62126e-06

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

1phase

3.76099e-06

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

2phase

7.98494e-07

215.15

Dmolar

2108.79

T

215.15

DmolarT

INCONSISTENT

1phase

8.72471e-06

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

1phase

2.02395e-05

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

2phase

7.98494e-07

215.15

Dmolar

4.33619e-10

T

215.15

DmolarT

INCONSISTENT

1phase

4.69514e-05

226.526

Dmolar

2084

T

226.526

DmolarT

INCONSISTENT

1phase

4.69514e-05

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

1phase

0.000252666

226.526

Dmolar

2084

T

226.526

DmolarT

INCONSISTENT

1phase

0.000252666

237.801

Dmolar

2059.65

T

237.801

DmolarT

INCONSISTENT

1phase

2.02395e-05

226.526

Dmolar

2084

T

226.526

DmolarT

INCONSISTENT

1phase

0.000252666

215.25

Dmolar

2108.57

T

215.25

DmolarT

INCONSISTENT

1phase

0.000108917

226.526

Dmolar

2084

T

226.526

DmolarT

INCONSISTENT

2phase

0.000117848

238.153

Dmolar

2058.89

T

238.153

DmolarT

INCONSISTENT

1phase

0.0013597

226.526

Dmolar

2084

T

226.526

DmolarT

INCONSISTENT

1phase

0.000108917

215.25

Dmolar

2108.57

T

215.25

DmolarUmolar

INCONSISTENT

1phase

0.000108917

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

4.69514e-05

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

2.02395e-05

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

8.72471e-06

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

0.000108917

226.526

Dmolar

2084

Umolar

-264452

DmolarUmolar

INCONSISTENT

1phase

3.76099e-06

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

4.69514e-05

226.526

Dmolar

2084

Umolar

-264452

DmolarUmolar

INCONSISTENT

1phase

0.000252666

237.801

Dmolar

2059.65

Umolar

-256627

DmolarUmolar

INCONSISTENT

1phase

1.62126e-06

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

2.02395e-05

226.526

Dmolar

2084

Umolar

-264452

DmolarUmolar

INCONSISTENT

1phase

0.000252666

226.526

Dmolar

2084

Umolar

-264452

DmolarUmolar

INCONSISTENT

1phase

0.000252666

215.25

Dmolar

2108.57

Umolar

-272058

DmolarUmolar

INCONSISTENT

1phase

0.0013597

226.526

Dmolar

2084

Umolar

-264452

HmolarP

INCONSISTENT

2phase

7.98494e-07

215.15

Hmolar

-272124

P

7.98494e-07

HmolarSmolar

INCONSISTENT

1phase

0.000108917

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

8.72471e-06

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

0.000108917

226.526

Hmolar

-264452

Smolar

-719.26

HmolarSmolar

INCONSISTENT

2phase

0.142592

284.158

Hmolar

-222462

Smolar

-554.471

HmolarSmolar

INCONSISTENT

1phase

4.69514e-05

226.526

Hmolar

-264452

Smolar

-719.26

HmolarSmolar

INCONSISTENT

1phase

1.62126e-06

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

3.76099e-06

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

2phase

7.98494e-07

215.15

Hmolar

-272124

Smolar

-754.006

HmolarSmolar

INCONSISTENT

1phase

2.02395e-05

226.526

Hmolar

-264452

Smolar

-719.26

HmolarSmolar

INCONSISTENT

1phase

2.02395e-05

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

2phase

1.83883

307.161

Hmolar

-204477

Smolar

-493.623

HmolarSmolar

INCONSISTENT

2phase

7.98494e-07

215.15

Hmolar

-176914

Smolar

-311.479

HmolarSmolar

INCONSISTENT

1phase

0.000252666

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

0.000586132

226.526

Hmolar

-264452

Smolar

-719.26

HmolarSmolar

INCONSISTENT

2phase

0.000117848

238.153

Hmolar

-256380

Smolar

-684.517

HmolarSmolar

INCONSISTENT

1phase

0.000586132

237.801

Hmolar

-256627

Smolar

-685.555

HmolarSmolar

INCONSISTENT

1phase

0.0013597

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

4.69514e-05

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

0.000586132

215.25

Hmolar

-272058

Smolar

-753.697

HmolarSmolar

INCONSISTENT

1phase

0.0013597

226.526

Hmolar

-264452

Smolar

-719.26

PSmolar

INCONSISTENT

2phase

7.98494e-07

215.15

P

7.98494e-07

Smolar

-754.006

SmolarT

INCONSISTENT

1phase

1.62126e-06

215.25

Smolar

-753.697

T

215.25

SmolarT

INCONSISTENT

1phase

8.72471e-06

215.25

Smolar

-753.697

T

215.25

SmolarT

INCONSISTENT

1phase

0.0169743

249.077

Smolar

-652.577

T

249.077

SmolarT

INCONSISTENT

1phase

0.0169743

260.353

Smolar

-620.313

T

260.353

SmolarT

INCONSISTENT

1phase

0.00731715

249.077

Smolar

-652.577

T

249.077

SmolarT

INCONSISTENT

1phase

0.00315423

249.077

Smolar

-652.577

T

249.077

SmolarT

INCONSISTENT

1phase

2.02395e-05

215.25

Smolar

-753.697

T

215.25

SmolarT

INCONSISTENT

1phase

0.0169743

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

0.00731715

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

0.00315423

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

0.0013597

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

4.69514e-05

226.526

Smolar

-719.26

T

226.526

SmolarT

INCONSISTENT

1phase

3.76099e-06

215.25

Smolar

-753.697

T

215.25

SmolarT

INCONSISTENT

1phase

0.000586132

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

0.000252666

237.801

Smolar

-685.555

T

237.801

SmolarT

INCONSISTENT

1phase

0.0013597

249.077

Smolar

-652.577

T

249.077

SmolarT

INCONSISTENT

1phase

0.00731715

260.353

Smolar

-620.313

T

260.353

SmolarT

INCONSISTENT

1phase

0.000586132

226.526

Smolar

-719.26

T

226.526

SmolarT

INCONSISTENT

1phase

0.0169743

226.526

Smolar

-719.26

T

226.526

SmolarT

INCONSISTENT

1phase

0.00731715

226.526

Smolar

-719.26

T

226.526

Superancillary Plots#

The following figure shows the accuracy of the superancillary functions relative to extended precision calculations carried out in C++ with the teqp library. The results of the iterative calculations with REFPROP and CoolProp are also shown.

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/MD4M2.png