Computer Programs for the Calculation of Thermodynamic Properties of Cryogens and other Fluids

Lemmon, Eric W.; Jacobsen, R. T.; Penoncello, Steven G.; Beyerlein, Steven

doi:10.1007/978-1-4615-2522-6_231

Cited by 11 publications

(7 citation statements)

References 25 publications

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“…The Inversion Curve of Carbon Dioxide. Predicted JTICs for carbon dioxide from the LK, BACK (with parameters taken from the TRC compilation 25 ), and Soft-SAFT (with the parameters given in the previous section) equations are shown in Figure 1, together with values generated from the multiparameter equation by Span-Wagner 36 and the Ely et al equation implemented in the ALLPROPS computer package (Lemmon et al 37 ). Also shown are the experimental values interpolated from Vukalovich and Altunin's interpolation of data of Price, given in Perry's handbook.…”

Section: Resultsmentioning

confidence: 99%

Predictions of the Joule−Thomson Inversion Curve for the n-Alkane Series and Carbon Dioxide from the Soft-SAFT Equation of State

Colina

Turrens

Gubbins

et al. 2001

Ind. Eng. Chem. Res.

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In this work, we use a molecular based equation of state, the Soft-SAFT equation, to predict complete Joule−Thomson inversion curves for carbon dioxide and the n-alkane series, including heavy n-alkanes up to octatetracontane (n-C48H98). Comparisons with available experimental and correlation data, for carbon dioxide and the lighter n-alkanes, show good quantitative agreement. We observe a strong dependence of the inversion curve on the set of molecular parameters used in the calculations, especially near the inversion point and in the high-temperature region. The equation is able to predict the general trend of inversion curves even for extreme conditions, with reduced pressure, P r = P/P c, values up to 40, and reduced temperatures, T r = T/T c, of almost 5.

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Section: Resultsmentioning

confidence: 99%

Predictions of the Joule−Thomson Inversion Curve for the n-Alkane Series and Carbon Dioxide from the Soft-SAFT Equation of State

Colina

Turrens

Gubbins

et al. 2001

Ind. Eng. Chem. Res.

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“…Four EOS developed specifically for carbon dioxide are used here. These are the Bender 16 equation as reported by Reynolds, 17 the equations by Pitzer and Sterner 5 and by Span and Wagner 3 already mentioned, and the Ely et al 18 equation implemented in the ALLPROPS computer package (Lemmon et al 19 ). Predicted third virial coefficients are shown in Figure 3 together with values generated from the DeSantis-Grande and Orbey-Vera correlations.…”

Section: Third Virial Coefficients: Prediction From Equations Of Statementioning

confidence: 99%

Predicted Inversion Curve and Third Virial Coefficients of Carbon Dioxide at High Temperatures

Colina

Olivera-Fuentes

2001

Ind. Eng. Chem. Res.

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The shape of the Joule-Thomson inversion curve of a fluid at high temperatures is shown to be directly related to its second and third virial coefficients. Experimental values and empirical correlations of the third virial coefficient of carbon dioxide are used to resolve a previously observed conflict between inversion curves obtained from different equations of state for this fluid. In particular, third virial coefficients predicted from the Pitzer-Sterner equation of state are shown to be in error, resulting therefore in an incorrect inversion curve.

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“…Molar densities were calculated using the same form of equation of state as that for helium. 10 Using the argon data for all modes, for all temperatures, and for pressures > 3 MPa, the average value for the first dielectric virial coefficient from the current work is (4.137 ( 0.009) cm 3 ‚mol -1 . At pressures < 3 MPa, the dielectric constants are very close to unity, and the scatter in the calculated first dielectric virial coefficient becomes large.…”

Section: Argon As a Test Fluidmentioning

confidence: 69%

“…The first dielectric virial coefficient, A , was taken as 0.517 248 cm 3 ‚mol -1 (Weinhold 8 ), and the second dielectric virial coefficient as 0.13 cm 6 ‚mol -2 (White and Gugan 9 ). The helium molar densities were obtained from an equation of state developed by Lemmon et al, 10 which gives helium densities to (0.1%.…”

Section: Discussionmentioning

confidence: 99%

Static Dielectric Constants for Liquid Water from 300 K to 350 K at Pressures to 13 MPa Using a New Radio-Frequency Resonator

2000

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A stainless steel reentrant cavity with primary resonances at three frequencies has been constructed and used to make dielectric constant measurements on liquid water between 300 K and 350 K, at pressures to 13 MPa. At the frequencies of this study (25 MHz to 250 MHz), there is no evidence of frequency dependence in the water data. Three methods have been used to convert resonant frequencies to dielectric constants. Using a lumped-parameter model recommended recently by NIST investigators, the dielectric constants from the current work agree within 0.1 with the best data available from other recent investigations. Temperature and pressure derivatives of the dielectric constant are nearly identical using all three methods, and they are found to be in reasonable but not perfect agreement with the best available correlation of previous results. A waveguide model approach resulted in dielectric constants about 0.3 higher than accepted values, likely due to uncertainties in geometry and materials properties. A second lumped-parameter approach also failed, likely due to its dependence on measured resonant frequency half widths with water occupying the cavity.

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Computer Programs for the Calculation of Thermodynamic Properties of Cryogens and other Fluids

Cited by 11 publications

References 25 publications

Predictions of the Joule−Thomson Inversion Curve for the n-Alkane Series and Carbon Dioxide from the Soft-SAFT Equation of State

Predictions of the Joule−Thomson Inversion Curve for the n-Alkane Series and Carbon Dioxide from the Soft-SAFT Equation of State

Predicted Inversion Curve and Third Virial Coefficients of Carbon Dioxide at High Temperatures

Static Dielectric Constants for Liquid Water from 300 K to 350 K at Pressures to 13 MPa Using a New Radio-Frequency Resonator

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