Partager

Document IIF

Remplacement du R-404A/R-23 par du R-448A, un frigorigène alternatif à plus faible PRP dans un congélateur à très basse température (ULT).

Retrofit of lower-GWP alternative R448A into an R404A/R23 ULT freezer.

Numéro : 1120

Auteurs : GIMÉNEZ-PRADES P., NAVARRO-ESBRÍ J., UDROIU C-M., BARRANGAN-CERVERA A., FORÉS-PALANQUES A., MOTA-BABILONI A.

Résumé

This work proposes an experimental assessment of R448A as a lower-GWP alternative to R404A in the hightemperature stage of a R404A/R23 ULT two-stage cascade refrigeration system. Furthermore, the use of capillary tubes and electronic expansion valves is compared. First, the pull-down performance starting from three ambient temperatures (15, 20, and 25 °C) down to –80 °C is analysed. Then, the hysteresis operation with set freezer temperatures of –80, –70, –60, and –50 °C is studied. The pull-down time was higher (38 to 55 min slower) using the capillary tubes compared to the electronic expansion valves. Also, the energy consumption of the hysteresis operation was higher (up to 32.3% higher) using the capillary tubes. A comparable energy consumption and cooling capacity were obtained with R404A/R23 and R448A/R23 using the electronic expansion valves. The highest COP was achieved by R448A/R23 (up to 10.2% higher than R404A/R23). Therefore, the suitability of R448A as a replacement for R404A in ULT refrigeration is confirmed.

Documents disponibles

Format PDF

Pages : 10 p.

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 : Retrofit of lower-GWP alternative R448A into an R404A/R23 ULT freezer.
  • Identifiant de la fiche : 30034174
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : 1st IIR International Conference on Refrigeration Adapting to Rising Temperatures
  • Date d'édition : 08/2025
  • DOI : http://dx.doi.org/10.18462/iir.adaptation.2024.1120

Liens


Voir d'autres communications du même compte rendu (45)
Voir le compte rendu de la conférence

Indexation