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Passage en revue des fluides pour les applications de conditionnement d’air.

Overview of fluids for AC applications.

Auteurs : LARMINAT P. de

Type d'article : Article

Résumé

The landscape of fluids used in refrigeration and air conditioning is changing rapidly. Fluids that have some potential to deplete the ozone layer are on the way to being banned. But concerns are also raised about the high global warming potential (GWP) of some of their potential alternatives. When seeking simultaneously no ozone-depleting substances (ODS) and low GWP, remaining options are often flammable (such as hydrocarbons) or mildly flammable such as new generation HFOs R-1234ze and yf, the formerly existing HFCs such as R-32, or blends thereof. For these reasons, there is growing interest in the use of flammable or mildly flammable fluids. It is also acknowledged that there should be no compromise on energy efficiency when implementing environment friendly fluids. A difficulty is that many of the potential replacement fluids are zeotropic blends, whose performance depends greatly on the architecture of the system where they are used. Therefore, it is complex to make apple-la-apple performance comparisons between flu ids, while a large number of blends are being proposed. This article is the first part of such a study proposing methodology to compare the properties of various fluids with a wide range in properties. Including zeotropic blends based on theoretical cycle calculations.

Détails

  • Titre original : Overview of fluids for AC applications.
  • Identifiant de la fiche : 30025208
  • Langues : Anglais
  • Source : ASHRAE Journal - vol. 59 - n. 2
  • Date d'édition : 02/2017

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