Partager

Document IIF

Prédiction de l’excès d’enthalpie pour les systèmes à absorption à base de liquide ionique.

Excess enthalpy prediction for ionic liquid based absorption systems.

Numéro : pap. TP-0092

Auteurs : WANG M., INFANTE FERREIRA C.

Résumé

Excess enthalpy is crucial in investigating absorption refrigeration and heat pump cycles. Apart from a direct measurement, it can be estimated from vapor-liquid equilibrium (VLE) data by using thermodynamic models. Models which can be used are equation-of-state (EOS) based model, activity-coefficient based methods, and generic Clausius-Clapeyron relation. This paper assesses the performance of different models in the excess enthalpy prediction of natural refrigerants/ILs pairs for absorption cycles. First, the fundamental theories on excess enthalpy prediction with different thermodynamic models are introduced. Then, the VLE data of two working pairs are fitted and used to estimate excess enthalpy by these models. The predicted results are compared with measured ones for the pair H2O/[emim][DMP]. The influence of fitted parameters on the excess enthalpy prediction is also discussed. The assessment reveals the predicted excess enthalpies have quite large deviations compared with the measured values. UNIFAC and Redlich-Kwong EOS models perform best with relatively smaller errors.

Documents disponibles

Format PDF

Pages : 9

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 : Excess enthalpy prediction for ionic liquid based absorption systems.
  • Identifiant de la fiche : 30021605
  • Langues : Anglais
  • Source : 5th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants.
  • Date d'édition : 23/04/2017
  • DOI : http://dx.doi.org/10.18462/iir.tptpr.2017.0092

Liens


Voir d'autres communications du même compte rendu (84)
Voir le compte rendu de la conférence

Indexation