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Document IIF

Évaluation de couples de fluides actifs pour un cycle à absorption mono-étagé basé sur l’enthalpie libre en excès.

The evaluation of working pairs for single-absorption cycle based on excess Gibbs free energy.

Numéro : pap. n. 531

Auteurs : FANG Y., HUANG J., ZHOU Y., et al.

Résumé

The absorption cycle is one of the methods to use the waste heat. There are a series of absorption working pairs. Most researchers thought that the excess Gibbs free energy (GE) was one of potential scale to evaluate the working pairs. In this work, the published vapor-liquid equilibrium (VLE) data of halohydrocarbon working pairs were collected and tabled. The VLE data were correlated with the NRTL model, and average relative pressure deviations were within 2.51 %. The single-stage absorption cycle model was established, the circulation ratio (CR), and exergy efficiency (?) were evaluated. The results showed that the working pairs with negative GE had a better system performance. And the performance of the system increased with the ratio of extremum GE at absorbing temperature to extremum GE at generating temperature. The ratio was a potential scale to evaluate the potential for absorption working pairs.

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Pages : 8

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Détails

  • Titre original : The evaluation of working pairs for single-absorption cycle based on excess Gibbs free energy.
  • Identifiant de la fiche : 30026003
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0531

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