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Essai préliminaire sur le transfert d’humidité d’un système de déshumidification membranaire à feuille plate.

Preliminary test on moisture transfer of flat sheet membrane-based dehumidification system.

Numéro : 2298

Auteurs : CHO H. J., CHEON S.-Y., LEE S. J., JEONG J. W.

Résumé

Recently, membrane-based dehumidification systems have been suggested as the next generation dehumidification systems for energy-efficient buildings. This study aims to experimentally investigate the water vapor transfer performance of a flat-sheet membrane module commonly used for building moisture treatment systems such as liquid desiccant dehumidification systems and energy recovery ventilators. We fabricated a membrane module consisting of a polytetrafluoroethylene (PTFE) sheet with 0.16 m2 of surface area. We then experimentally examined the characteristics of water vapor transfer in the flat-sheet membrane module under various operating conditions, including fluid temperature, partial water vapor pressure, and flow rate, which flowed to the feed and permeate sides of the membrane sheet, respectively. In general, the water vapor transfer resistance in the membrane module takes into account three regions: the membrane layer, the feed boundary layers, and the permeate sides. In this study, the water vapor transfer resistance of the membrane was then obtained by subtracting the resistances on the boundary layers from the overall resistance. The overall moisture transfer resistance was determined based on the dehumidification rate measured in the experiments. The moisture transfer resistance on the boundary layers was estimated using the prediction correlation of the Sherwood number. From the test data, it was observed that the permeance of the selected membrane ranged from 2,179 to 2,729 gas permeation unit (GPU) accordance with the operating conditions of the feed and permeate fluids.

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Pages : 9 p.

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Détails

  • Titre original : Preliminary test on moisture transfer of flat sheet membrane-based dehumidification system.
  • Identifiant de la fiche : 30033186
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2024 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 17/07/2024

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