Partager

Document IIF

Analyse thermodynamique et impact des masses thermiques sur les cycles à adsorption en utilisant les couples Maxsorb III/R245fa et SAC-2/R245fa.

Thermodynamic analysis and impact of thermal masses on adsorption cycles using MaxsorbIII/R245fa and SAC-2/R245fa pairs.

Auteurs : SEO S., KAWAKAMI H., MIKSIK F., TAKATA N., THU K., MIYAZAKI T.

Type d'article : Article de la RIF

Résumé

Adsorption cycles have been gaining significant interest in waste-heat recovery and renewable energy utilization. Adsorption isotherm data and the equilibrium cycle analysis are crucial steps in evaluating a typical adsorbent + adsorbate pair. In this paper, the performance of Maxsorb III + R245fa and spherical activated carbon, SAC-2 + R245fa were studied for adsorption cooling and adsorption heat transformer (AHT) cycles. Adsorption isotherms of these pairs were measured using the constant-volume-variable-pressure apparatus for temperatures ranging from 30 °C to 60 °C, and fitted with the Dubinin–Astakhov (D–A) and the Tóth isotherm model. An improved equilibrium model was developed, accounting the effects of thermal masses. The specific cooling energy (SCE) and the coefficient of performance (COP) of the adsorption cooling cycle were evaluated for various thermal mass to adsorbent mass ratios. It is observed that SAC-2 + R245fa pair offers better SCEs (20 kJ kg−1and 160 kJ kg−1 at 60 °C and 90 °C, respectively) when compared to that of Maxsorb III + R245fa. The impact of thermal mass is found to be significant for all regeneration temperatures for Maxsorb III + R245fa while the deterioration of COP in SAC-2 + R245fa is notable for high regeneration temperatures (> 75 °C). When employed in the AHT cycle, Maxsorb III offers a slightly higher useful heat while SAC-2 provides a better Quh/QQR albeit by a small margin. The Quh/QQR values for both studied pairs are more than 0.6 for all regeneration temperatures for the heat extraction at 120 °C.

Documents disponibles

Format PDF

Pages : 52-62

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 : Thermodynamic analysis and impact of thermal masses on adsorption cycles using MaxsorbIII/R245fa and SAC-2/R245fa pairs.
  • Identifiant de la fiche : 30028166
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 123
  • Date d'édition : 03/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.12.005

Liens


Voir d'autres articles du même numéro (19)
Voir la source

Indexation