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Transfert de chaleur et chute de pression de l’écoulement de R1123/R32 dans des tubes micro-ailetés horizontaux en phase de condensation et d'évaporation.

Heat transfer and pressure drop of R1123/R32 flow in horizontal microfin tubes during condensation and evaporation.

Numéro : pap. 2164

Auteurs : KONDOU C., KOYAMA S.

Résumé

In this study, the heat transfer coefficient (HTC) and pressure drop of the new low global warming potential refrigerant mixture R1123/R32 (40/60 mass%) in a 6.0 mm OD horizontal microfin tube during condensation at 40 °C and evaporation at 10 °C are experimentally quantified. The data are then compared to the component R32. Both the condensation HTC and pressure drop of R1123/R32 (40/60 mass%) are somewhat lower than those of R32. Similarly, the pressure drop of R1123/R32 during the evaporation process at 10 °C is somewhat lower than that of R32. However, the evaporation HTC is comparable to that of R32. The lower surface tension of R1123/R32 can enhance the nucleate boiling and compensate the heat transfer degradation based on the difference in volatility.

Documents disponibles

Format PDF

Pages : 8

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Heat transfer and pressure drop of R1123/R32 flow in horizontal microfin tubes during condensation and evaporation.
  • Identifiant de la fiche : 30024431
  • Langues : Anglais
  • Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 09/07/2018

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