Partager

Document IIF

Mouillage et transfert de chaleur et de masse sur des plaques d'échangeur de chaleur verticales structurées pour des pompes à chaleur à absorption compactes.

Wetting and heat and mass transfer at structured vertical heat exchanger plates for compact absorption heat pumps.

Numéro : 0957

Auteurs : LEX T., SCHWEIGLER C.

Résumé

To investigate different structures of heat exchanger plates for application in absorption heat pumps, a test rig has been developed and applied for an experimental study. The test rig consists of a pair of heat exchanger plates, placed in a vacuum tight plexiglass chamber. The transparent chamber allows visual observation of the wetting behavior of the falling film on the heat exchanger plate at subatmospheric pressures. The test rig can either be operated with water for the investigation of the two heat exchanger sections operating as evaporator and condenser, or with water/lithium bromide solution for operation as generator/absorber. In the first set of experiments, two horizontally structured plates have been examined and referenced to an unstructured plate. The experiments reveal that especially the 0.5 mm capillary structure improves the wetting behavior of the test plate and achieves a relatively high heat transfer coefficient in the magnitude of 1.8 kW/m² K, even at low distribution rates.

Documents disponibles

Format PDF

Pages : 12

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 : Wetting and heat and mass transfer at structured vertical heat exchanger plates for compact absorption heat pumps.
  • Identifiant de la fiche : 30031477
  • Langues : Anglais
  • Sujet : Technologie
  • Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Date d'édition : 21/08/2023
  • DOI : http://dx.doi.org/10.18462/iir.icr.2023.0957

Liens


Voir d'autres communications du même compte rendu (491)
Voir le compte rendu de la conférence

Indexation