Partager

Document IIF

Extending the range.

Auteurs : POWELL R. L.

Résumé

With the commissioning of large production plants around the world HFC 134a is now replacing CFC 12 in major refrigerant and air conditioning applications. But what will follow it? Various blends based on HFC 32, HFC 125, HFC 143a and 134a are already being supplied as replacements for HCFC 22 and R502. In contrast to the CFC and HCFC refrigerants some compositions are zeotropes showing modest temperature glides in condensers and evaporators. Initial misgivings about possible differential leakage and poor heat transfer with zeotropes appear to be unfounded in practice. Indeed, small, but useful, gains in energy efficiency have been observed, quickening the interest in specifically designing blends with large temperature glides. This may require the introduction of refrigerants with properties different from those of the major CFCs and HCFCs. Drawing on his chemical knowledge the author will describe the range of compounds from which such future refrigerants might be drawn and criteria for selecting them.

Documents disponibles

Format PDF

Pages : p 11-19

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 : Extending the range.
  • Identifiant de la fiche : 30034019
  • Langues : Anglais
  • Sujet : Environnement
  • Source : CFCs, the Day After.
  • Date d'édition : 1994
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

Liens


Voir d'autres communications du même compte rendu (95)
Voir le compte rendu de la conférence

Indexation