Partager

Document IIF

Performance expérimentale d'un système de déshumidification à déshydratant liquide utilisant un échangeur de chaleur et de masse à contact indirect.

Experimental performance of a liquid desiccant dehumidification system using an indirect contact heat & mass exchanger.

Auteurs : DAS R. S., TRIPATHI S., JAIN S.

Résumé

Liquid desiccants can effectively and efficiently dehumidify air while operating on solar energy or any other low grade heat source. Electrical energy is required only for the operation of the pumps and blowers. If solar PV can be used for such small power generation, these systems can easily operate as standalone systems on renewable energy. Further, thermal energy can be stored in the form of regenerated (concentrated) desiccant. The cooling of desiccant is desirable as it assists the dehumidification process. However, one of the major concerns of liquid desiccant dehumidification process is the carryover of desiccant into the air when they come in direct contact in the packing. Low flow designs have been reported in the literature to reduce the carryover substantially. Several types of semi permeable micro porous membranes have been used for indirect contact exchanger such as polypropylene, cellulose acetate, hollow fiber membrane, composite liquid membrane etc. In this work, a double channeled indirect contact exchanger for air to liquid desiccant heat and mass transfer in a liquid desiccant dehumidification system has been employed. A special wetted paper has been used that separates the air from the liquid desiccant, due to its low lost. This arrangement minimizes the air to desiccant contact in the exchanger resulting in negligible carryover unlike other contactors viz. packed bed, spray towers, etc. where direct contact between air and liquid desiccant causes carryover of desiccant. Due to the introduction of a separating wall, there is an additional resistance to heat and mass transfer, which needs to be minimized.

Documents disponibles

Format PDF

Pages : 725-732

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 : Experimental performance of a liquid desiccant dehumidification system using an indirect contact heat & mass exchanger.
  • Identifiant de la fiche : 30001275
  • Langues : Anglais
  • Source : Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Date d'édition : 06/04/2011

Liens


Voir d'autres communications du même compte rendu (122)
Voir le compte rendu de la conférence

Indexation