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Run-around energy recovery system for air-to-air applications using crossflow exchangers coupled with a porous solid desiccant. II. Results and performance sensitivity.

Système de récupération d'énergie pour les applications air-air utilisant des échangeurs à écoulements croisés couplés à un déshydratant solide poreux. II. Résultats et sensibilité à la performance.

Auteurs : LI M., SIMONSON C. J., BESANT R. W., et al.

Type d'article : Article

Résumé

The model for the run-around energy recovery system was developed and verified for sensible and latent energy transfer in Part I (see this Bulletin, reference 2010-0054). In this paper, the sensible, latent, and overall effectiveness are investigated in each exchanger as well as the run-around exchanger. The overall effectiveness of the run-around energy recovery system is dependent on the airflow rate, the solid desiccant flow rate, the desiccant properties, specific surface area, the size of each exchanger, and the inlet air operating conditions. The run-around system can achieve a high overall effectiveness when the flow rates and exchanger's properties are properly chosen. Comparisons between the solid desiccant and salt solution run-around system effectiveness show they are in agreement. In a sensitivity study, the thickness of desiccant on the fiber is investigated in the solid run-around system. It was found that a good performance is obtained with very thin desiccant coatings (1 or 2 microm). During the practical use of this system, a desiccant-coated fiber could be inserted into very porous balls or cages, protecting the desiccant-coated fiber from mechanical wear. The performance sensitivity for this kind of run-around system is demonstrated.

Détails

  • Titre original : Run-around energy recovery system for air-to-air applications using crossflow exchangers coupled with a porous solid desiccant. II. Results and performance sensitivity.
  • Identifiant de la fiche : 2010-0055
  • Langues : Anglais
  • Source : HVAC&R Research - vol. 15 - n. 3
  • Date d'édition : 05/2009

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