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Optimisation de la composition d'un mélange de gaz dans un cycle Joule-Thomson.

Optimization of the composition of a gas mixture in a Joule-Thomson cycle.

Auteurs : KEPPLER F., NELLIS G., KLEIN S. A.

Type d'article : Article

Résumé

Mixed gas working fluid can be used within Joule-Thomson devices to achieve a greater refrigeration effect than is possible with a pure substance. Lower temperatures and higher cooling powers can be obtained with appropriate mixtures, resulting in lower operating pressures and mass flow rates. This paper describes a computational tool that allows the composition of gas mixtures to be optimized for a particular operating condition. Automated optimization algorithms are described, evaluated, and validated for two- and three-component mixtures consisting of nitrogen and various hydrocarbons. A genetic optimization algorithm was found to be the most robust and reliable technique and was adapted to this application. Subsequently, the optimization space was extended to a larger number of components for a range of load temperatures and operating pressures. The performance of optimized hydrocarbon gas mixtures is compared with that of nonflammable hydrofluorocarbon mixtures for a range of load temperatures and supply pressures.

Détails

  • Titre original : Optimization of the composition of a gas mixture in a Joule-Thomson cycle.
  • Identifiant de la fiche : 2004-2822
  • Langues : Anglais
  • Source : HVAC&R Research - vol. 10 - n. 2
  • Date d'édition : 04/2004
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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