Partager

Document IIF

Régulation par vortex pour la modulation du débit moteur des systèmes éjecteurs au R744 transcritique.

Vortex control for motive flow rate modulation of transcritical R744 ejector systems.

Numéro : pap. 1143

Auteurs : ZHU J., ELBEL S.

Résumé

This paper presents results of a novel expansion device refrigerant flow control mechanism called vortex control. The key advantage of this control mechanism is being far less vulnerable to clogging than conventional expansion devices since the flow control is achieved without having to adjust the cross-sectional flow area in order to achieve the desired modulation effect. Vortex flow control is seen as particularly promising when applied to transcritical R744 ejectors, where flow control of the motive nozzle is known to substantially impact ejector and cycle efficiencies. Vortex control can potentially offer the advantage that overall ejector efficiency is less impacted than designs where a needle is used to modulate the motive nozzle flow. The effects of operating conditions were investigated experimentally. It is shown that vortex flow control appears to be feasible for two-phase ejectors using R744 and similar flow modulation ranges as with needle control were achieved.

Documents disponibles

Format PDF

Pages : 8

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 : Vortex control for motive flow rate modulation of transcritical R744 ejector systems.
  • Identifiant de la fiche : 30023508
  • Langues : Anglais
  • Source : 13th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
  • Date d'édition : 18/06/2018
  • DOI : http://dx.doi.org/10.18462/iir.gl.2018.1143

Liens


Voir d'autres communications du même compte rendu (177)
Voir le compte rendu de la conférence

Indexation