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Impact of oil presence on the evaporator enthalpy working with R1234ze(E) and R1234yf.

Impact de la présence d'huile sur l'enthalpie de l'évaporateur fonctionnant au R1234ze(E) et au R1234yf.

Auteurs : SUN Y., WEI Q., WANG J., WANG X., HE M.

Type d'article : Article de la RIF

Résumé

R1234ze(E) and R1234yf, as green refrigerants, have received more and more attention in recent years. To better understand the performance of the evaporator working with a refrigerant/lubricating oil mixture, the solubilities of R1234ze(E)/POE85 and R1234yf/POE85 were measured using the isochoric saturation method in the temperature range from 278.15 K to 348.15 K. The NRTL model was used to correlate the new data. Using the new data, the pressure-enthalpy-vapor quality diagram and superheat-non-evaporation diagram were presented. The results show that the enthalpies of refrigerant/lubricating oil are always lower than those of pure refrigerant. The critical vapor quality is related to the refrigerant/oil solubility and oil circulation mass ratio. The enthalpy change ratio is directly proportional to the superheat and inversely proportional to the oil circulation mass fraction. The non-evaporation quality decreases as the superheat increases and increases as the mass fraction of oil circulation increases.

Documents disponibles

Format PDF

Pages : 153-162

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 : Impact of oil presence on the evaporator enthalpy working with R1234ze(E) and R1234yf.
  • Identifiant de la fiche : 30028706
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - 129
  • Date d'édition : 09/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2021.05.004
  • Disponible à la bibliothèque de l'IIF

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