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Évaluation de modèles d'équilibre liquide-vapeur pour les paires fonctionnant avec du liquide ionique dans les cycles à absorption.

Assessment of vapor–liquid equilibrium models for ionic liquid based working pairs in absorption cycles.

Auteurs : WANG M., BECKER T. M., INFANTE FERREIRA C. A.

Type d'article : Article, Article de la RIF

Résumé

This paper assesses the performance of vapor–liquid equilibrium (VLE) models in ionic liquid based absorption cycles with natural refrigerants. Frequently used equation-of-state (EOS) based models, activity coefficient based models, and generic Clausius–Clapeyron relations are evaluated. Working pairs considered are H2O/[emim][DMP] and NH3/[bmim][BF4]. Firstly, experimental VLE data of those working pairs are correlated by using the models. Mixing enthalpies are then estimated using the models and corresponding correlated parameters. Performances of the different models in reproducing VLE data and estimating mixing enthalpies are compared with each other. Subsequently, total enthalpies and thermodynamic performances of absorption refrigeration cycles are predicted based on the different models. The assessment reveals that the RK-EOS and the NRTL model perform best in reproducing VLE data. In addition, the RK-EOS and the UNIFAC model show the best performance in estimating mixing enthalpies. Hence, the RK-EOS is recommended in correlating VLE data and estimating mixing enthalpies in absorption cycles.

Documents disponibles

Format PDF

Pages : 10-25

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Assessment of vapor–liquid equilibrium models for ionic liquid based working pairs in absorption cycles.
  • Identifiant de la fiche : 30023875
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 87
  • Date d'édition : 03/2018
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.09.021

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