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A new look at multiphase Rachford-Rice equations for negative flashes

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Claude F. Leibovici and Dan Vladimir Nichita

Editorial: Elsevier, Fluid Phase Equilibria, 267 (2), p.127-132, 2008.

Rezumat:

The elegant method proposed by Michelsen [Comput. Chem. Eng. 18 (1994) 545-550] for solving multiphase Rachford-Rice equations as a bound constrained minimization is extended to the negative flash region; this method is definitely much more robust than any method based on equation solving. The problem is reformulated as an unbounded linearly constrained minimization. The feasible domain is limited by (only few of the) hyperplanes defined by equilibrium constants. The proposed method is applied to several three-phase cases. doi:10.1016/j.fluid.2008.03.006

Cuvinte cheie: multiphase equilibrium, Rachford-Rice equations, equilibrium constants, constrained optimization, negative flash // multiphase equilibrium, Rachford-Rice equations, equilibrium constants, constrained optimization, negative flash

URL: http://www.sciencedirect.com/science/journal/03783812