Measuring and testing – Gas analysis – By thermal property
Patent
1999-06-29
2000-05-23
Williams, Hezron
Measuring and testing
Gas analysis
By thermal property
73 2903, 73 3002, 73 2503, 36452801, 36471606, G01N 900, G01N 2902, G01F 1504
Patent
active
060653280
ABSTRACT:
The instant invention relates to a method and apparatus to determine the thermodynamic properties of a gas medium without making a determination of gas composition. In the instant invention, the speed of sound of a gas medium in a vessel is determined at various temperatures and pressures based upon an isobaric process with estimated initial values of density, compressibility and numerical deriviative (dZ/dT) for the same gas medium. According to the preferred embodiment, this information may be measured at constant pressure or constant temperature. Once the physical information is determined, a routine is executed by which initial estimated parameters such as the compressibility and heat capacity of the gas medium will converge to accurate values. From these parameters, the thermophysical properties of the gas medium may be determined.
REFERENCES:
patent: 4262523 (1981-04-01), Stansfeld
patent: 4489592 (1984-12-01), Pacanowski et al.
patent: 4596470 (1986-06-01), Park
patent: 4663977 (1987-05-01), Vander Heyden
patent: 4872335 (1989-10-01), Tsuruoka et al.
patent: 5159843 (1992-11-01), Shakkottai et al.
patent: 5285675 (1994-02-01), Colgate et al.
patent: 5311447 (1994-05-01), Bonne
patent: 5329966 (1994-07-01), Fenimore et al.
patent: 5343758 (1994-09-01), Ingrain et al.
patent: 5693873 (1997-12-01), Thuries et al.
patent: 5932793 (1999-08-01), Dayton et al.
The Speed of Sound and Derived Thermodynamic Properties of Ethane at Temperatures between 220 K and 450 K and Pressures up to 10.5 MPa, by A.F. Estrada-Alexanders and J. P. M. Trusler, J. Chem. Thermodynamics 1997, pp. 29, 991-1015.
Fluid Properties from the Speed and Absorption of Sound, The Adam Hilgers Series on Measurement Science and Technology: Physical Acoustics and Metrology of Fluids. by J. P. M. Trusler, 1991, pp. 1-9.
The Speed of Sound and Derived Thermodynamic Properties of Methane at Temperatures Between 275 K and 375 K and Pressures up to 10 MPa, by J. P. M. Trusler and M. Zarari, J. Chem. Thermodynamics 1992, pp. 24, 973-991.
Determination of Thermodynamic properties from the Speed of Sound, by A.F. Estrada-Alexanders, J. P. M. Trusler, and M. P. Zarari, International Journal of Thermophysics, vol. 16, No. 3, 1995, pp. 663-673.
Thermodynamic Properties of Gaseous Argon at Temperatures Between 110 and 450 K and Densities up to 6.8 mol.circle-w/dot.dm.sup.-3 Determined from the Speed of Sound, by A. F. Estrada-Alexanders and J. P. M. Trusler, International Journal of Thermophysics, vol. 17, No. 6, 1996.
Beyerlein Steve
Dayton Troy
Goodwin Anthony R. H.
Savidge Jeffrey L.
Gas Research Institute
Wiggins J. David
Williams Hezron
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