Partager

Document IIF

Processus de transfert dans un thermosiphon utilisant des nanofluides d’oxyde de graphène et de silice.

Transfer processes in the thermosyphon employing graphene oxide and silica nanofluids.

Numéro : pap. n. 254

Auteurs : WLAZLAK A., ZAJACZKOWSKI B., KROLICKI Z., et al.

Résumé

Thermosyphons, as passive heat transfer devices, often assist heat pumps and refrigeration systems. Employing nanoadditives enhance their heat transfer capabilities and in consequence improve performance of thermal systems. Here, we analyse thermal resistances and time-dependent boiling characteristics of devices filled with water-based silica and graphene oxide nanofluids, known to enhance heat transfer capabilities of water/glycol solutions. The experimental campaign in this work encompassed source temperatures 40-85°C. Nanofluids reduced thermal resistance of the device at low heat loads. The impact of nanoadditives was restricted to the evaporator section and correlated with the formation of porous layer on the heater's surface. Additionally, nanofluid affected a pseudo-steady state geyser boiling. The frequency and intensity of geyser events depended on the type of nanofluid, surfactants, and temperatures of heat sources.

Documents disponibles

Format PDF

Pages : 10

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 : Transfer processes in the thermosyphon employing graphene oxide and silica nanofluids.
  • Identifiant de la fiche : 30025974
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0254

Liens


Voir d'autres communications du même compte rendu (632)
Voir le compte rendu de la conférence

Indexation