An equal area method for determining dew and bubble points of fluid mixtures
- Texas A&M Univ., College Station, TX (United States)
The measurement of mass flow rates depends upon knowledge of the number of phases present, the states of those phases and their densities at the pressure and temperature of the measurement both upstream and downstream. A new Gibbs energy minimization method was developed by us in 1994; based upon the well-known Maxwell Equal Area Rule (MEAR) for pure-component system. MEAR is both simple and faster to convergence than previous procedures (e.g., tangent plane) Here we apply this new method to the determination of dew and bubble points for multicomponent fluid mixtures, especially those found in the production and processing of petroleum, petrochemicals and natural gases. A Peng-Robinson equation of state (PR/EOS) is used to model the fluid mixtures and ultimately to provide the phase densities. Mixing rules are generally of the Wong-Sandler types although conventional van der Waal rules may be easily substituted. MEAR is shown to be particularly advantageous as the number of components is increased. Its graphical nature lends to the use of interactive computer graphics when multi-dimensional searches become necessary to find the fluid state of the system.
- OSTI ID:
- 443928
- Report Number(s):
- CONF-950391-; CNN: Grant CTS-9317812; TRN: 96:005694-0047
- Resource Relation:
- Conference: 3. international symposium on fluid flow measurement, San Antonio, TX (United States), 20-22 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the fluid flow measurement; PB: 837 p.
- Country of Publication:
- United States
- Language:
- English
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