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Safe use of HCFC alternatives in refrigeration and air-conditioning: flammable refrigerants.

Utilisation sûre des substituts aux HCFC dans les domaines du froid et du conditionnement d'air : frigorigènes inflammables.

Auteurs : ONU Environnement (ex-PNUE)

Type d'article : Article de périodique

Résumé

With the advancing worldwide phase out of HCFCs, UNEP’s OzonAction Division of Technology has produced a series of factsheets on the safe use of the new alternatives. There are a number of flammable refrigerants – some old and some recently developed. Although there are many flammable refrigerants, the extent of their flammability varies quite widely. It can be seen that some substances have relatively low ‘lower flammability limits’ (LFLs). For example R290 has an LFLs of 38 g per m3. Other refrigerants have significantly higher LFLs, for example R1234yf has an LFL of 289 g per m3). There are other flammability characteristics such as minimum ignition energy, heat of combustion and burning speed that have an impact of the ease with which a substance can be ignited and the severity of the consequence following ignition.

Détails

  • Titre original : Safe use of HCFC alternatives in refrigeration and air-conditioning: flammable refrigerants.
  • Identifiant de la fiche : 30016505
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Date d'édition : 07/2015

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