Partager

Document IIF

Mesure des propriétés thermodynamiques de sels d'ammoniac et simulation thermodynamique de système de refroidissement à résorption.

Measurement of thermodynamic properties of ammoniated salts and thermodynamic simulation of resorption cooling system.

Auteurs : SHARMA R., ANIL KUMAR E.

Type d'article : Article, Article de la RIF

Résumé

The adsorption and desorption pressure-concentration isotherms (PCIs) of ammonia on NaBr and MnCl2 salts are measured at different temperatures. Significant hysteresis is observed between adsorption and desorption PCIs. From PCI data, van't Hoff plots are constructed to estimate the enthalpies of formation for different ammonia concentrations. Substantial variation in reaction enthalpy during adsorption and desorption is noticed from beginning to the end of the processes. The average values of ?H for NaBr and MnCl2 are -28.59?kJ?mol-1 and -60.17?kJ?mol-1 respectively for adsorption and 29.16?kJ?mol-1 and 65.62?kJ?mol-1 respectively for desorption. The resorption cooling system is thermodynamically analyzed using measured equilibrium data. The coefficient of performance (COP) and specific cooling power (SCP) of resorption system is evaluated to be 0.31 and 52?W?kg-1 at refrigeration, regeneration and ambient temperatures of -15?°C, 170?°C and 25?°C respectively at a mass ratio of 4. About 49.18% decrease in COP is noticed in comparison with maximum theoretical COP in which 32.78% and 16.36% reductions are due to hysteresis effect and thermal capacity of metallic mass respectively.

Documents disponibles

Format PDF

Pages : 54-68

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 : Measurement of thermodynamic properties of ammoniated salts and thermodynamic simulation of resorption cooling system.
  • Identifiant de la fiche : 30017757
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 67
  • Date d'édition : 07/2016

Liens


Voir d'autres articles du même numéro (36)
Voir la source

Indexation