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Document IIF

Analyse thermodynamique et numérique de la performance d’un éjecteur à des modes de fonctionnement hors conception.

Thermodynamic and numerical analysis of the ejector performance at off-design operation modes.

Numéro : pap. n. 170

Auteurs : CHEN G., VOLOVYK O., IERIN V., et al.

Résumé

The study provides the results of the numerical and thermodynamic analysis of the ejector performance at off-design operation modes. The CFD modeling is used to reveal the phenomena of the mixing process at different parts of the ejector and to study the effect of operating conditions on its performance. A thermodynamic method for the determination of the optimal adjustment range of three operating parameters is described. The results show that the changing in even one operating parameter negatively affects the ejector efficiency. The back pressure affects the ejector performance more than the generator pressure and the evaporator pressure.
From the analysis it follows that the ejector has a lot of double-choking modes of operation with its maximum efficiency, but not only one mode as usually is stated in literature. It is found that double-choking condition for the constant geometry ejector depends on the combination of the operating parameters of the flows.

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Pages : 8

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Détails

  • Titre original : Thermodynamic and numerical analysis of the ejector performance at off-design operation modes.
  • Identifiant de la fiche : 30026393
  • 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.2019.0170

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