Method for providing robustness to the solution of the cubic...

Details Method for providing robustness to the solution of the cubic... Method for providing robustness to the solution of the cubic...

2003-07-08

2008-03-25

Raymond, Edward (Department: 2857)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Pressure

C702S022000, C324S353000, C073S861080

Reexamination Certificate

active

07349819

ABSTRACT:
The cubic equations of state (CEOS) relate pressure, temperature and molar volume of a mixture. The deviation of the physical properties of a mixture from ideality is expressed by the compressibility factor. The compressibility factor is calculated from the CEOS. There is described a solution to the CEOS which provides a continuous solution for compressibility factors over the entire range of operating conditions. This solution avoids the non-unique roots, trivial roots and singularities that are present in the prior art solutions of the CEOS.

REFERENCES:
patent: 2004/0260497 (2004-12-01), DiFoggio et al.

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