Effect of side streams on supersonic gas separations

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Supersonic gas separators are converging-diverging nozzles with side streams that remove condensed phases. Computational fluid dynamics is often used for the analysis and mechanical design of such units because of the detailed data it provides, thanks to the many grid points that sample fluid behavior within the equipment. Less common is the use of models with simpler geometric assumptions but rigorous evaluations of the thermodynamic properties of the flowing fluid. Such models are useful for preliminary design if they capture the essential features of the phenomena that occur within the nozzle. This article presents a one-dimensional flow model for supersonic nozzles with side streams under continuous, steady-state operation. The procedure involves several steps, which require solving of isentropic and isenthalpic flash problems and predicting the thermodynamic sound speed. These calculations use rigorous algorithms and thermodynamic properties evaluated with the Peng-Robinson equation of state. Nonetheless, the procedure is general and allows the use of other equations of state. The results are in good agreement with experimental data from the literature. In addition, a parametric sensitivity study shows that the model predicts meaningful trends. The set of results indicates that the model is potentially useful for the conceptual design of supersonic separators.

Original languageEnglish
Pages (from-to)299-308
Number of pages10
JournalJournal of Natural Gas Science and Engineering
Volume35
DOIs
Publication statusPublished - 1 Sep 2016

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Nozzles
Gases
Separators
Equations of state
Thermodynamic properties
Fluids
Conceptual design
Computational fluid dynamics
Acoustic waves
Thermodynamics

Keywords

  • Equation of state
  • Natural gas
  • Separation
  • Side stream
  • Supersonic

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

Cite this

Effect of side streams on supersonic gas separations. / Castier, Marcelo.

In: Journal of Natural Gas Science and Engineering, Vol. 35, 01.09.2016, p. 299-308.

Research output: Contribution to journalArticle

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