New reduced parameters for flash calculations based on two-parameter BIP formula

Seyhan Emre Gorucu, Russell Taylor Johns

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Phase equilibrium calculations constitute a significant percentage of computational time in compositional simulation, especially as the number of components and phases increase. Reduced methods address this problem by carrying out phase equilibrium calculations using a reduced number of independent parameters. These methods have shown to speed up flash calculations, decrease simulation times, and also improve convergence behavior. In this paper, we present new reduced parameters using the two-parameter binary interaction parameter formula originally proposed by Li and Johns (2006). The new reduced parameters are applied to solve two-phase flash calculations for five different fluid descriptions. The results show a significant reduction in the number of iterations required to achieve convergence compared to the Li and Johns original approach. The improved method is also shown to converge more often than other flash calculation methods for the cases studied. We further compare computational times with the new reduced approach to conventional flash calculations based on the minimization of Gibbs energy using an optimized compiler.

Original languageEnglish (US)
Pages (from-to)50-58
Number of pages9
JournalJournal of Petroleum Science and Engineering
Volume116
DOIs
StatePublished - Apr 2014

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phase equilibrium
Phase equilibria
simulation
Gibbs free energy
calculation
parameter
fluid
Fluids
energy
method
calculation method
speed

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

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abstract = "Phase equilibrium calculations constitute a significant percentage of computational time in compositional simulation, especially as the number of components and phases increase. Reduced methods address this problem by carrying out phase equilibrium calculations using a reduced number of independent parameters. These methods have shown to speed up flash calculations, decrease simulation times, and also improve convergence behavior. In this paper, we present new reduced parameters using the two-parameter binary interaction parameter formula originally proposed by Li and Johns (2006). The new reduced parameters are applied to solve two-phase flash calculations for five different fluid descriptions. The results show a significant reduction in the number of iterations required to achieve convergence compared to the Li and Johns original approach. The improved method is also shown to converge more often than other flash calculation methods for the cases studied. We further compare computational times with the new reduced approach to conventional flash calculations based on the minimization of Gibbs energy using an optimized compiler.",
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New reduced parameters for flash calculations based on two-parameter BIP formula. / Gorucu, Seyhan Emre; Johns, Russell Taylor.

In: Journal of Petroleum Science and Engineering, Vol. 116, 04.2014, p. 50-58.

Research output: Contribution to journalArticle

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