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Essais comparatifs sur les performances et limites de fonctionnement d’unités de condensation utilisant plusieurs frigorigènes.

Test of condensing units’ performance and operating limits using different refrigerants.

Numéro : 2412

Auteurs : HADDAD E., SAAB S., ZOUGHAIB A.

Résumé

The European regulation has set a series of limitation to reach the objective of reducing the Global Warming Potential (GWP) emissions. Among these limits, the ban of Hydrofluorocarbons (HFC) refrigerants having a GWP higher than 2500 starting 2020. To replace these refrigerants, a new family of refrigerants was invented: hydro-fluoro-olefins (HFOs), also new systems were developed using CO2. In this paper, we present the outcome of a testing campaign aiming to compare the performance, operating range and cost of two condensing units of a rated capacity of 8kW cooling a secondary glycol loop. One of these machines, initially operated with R-404A, is operated with low GWP blends containing HFO while the other is using CO2. The comparison includes traditional HFC refrigerant (R-404A), 3 different commercial HFOs containing blends and transcritical CO2. The comparison is made using different ambient temperatures to have a fair comparison. A special focus is done analysing the glide impact on the condensing unit behaviour and performance. The glide matching blend (R-454C) shows an increased performance while the other refrigerants are penalized. Finally, HFOs containing blends were found more efficient and capable of operating at a wider temperature range compared to CO2.

Documents disponibles

Format PDF

Pages : 9

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 : Test of condensing units’ performance and operating limits using different refrigerants.
  • Identifiant de la fiche : 30028477
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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