L'utilisation des hydrocarbures dans les conditionneurs d'air présente-t-il des risques ? (en anglais)

Une équipe de GIZ Proklima a évalué le risque lié à l'utilisation du R600a et du R290 dans des conditionneurs d'air bi-blocs et des réfrigérateurs domestiques.
The use of flammable refrigerants, such as HC-290 (propane) as an alternative to HCFC-22 in room split air conditioners (SACs) and domestic refrigerators (DR) is spreading.

Responding to security concerns, a team from GIZ Proklima used quantitative risk assessment tools to estimate the severity and frequency of ignition HC-600a (iso-butane) and HC-290 SACs and DRs. Parameters such as leak rates and frequencies, flammable volumes, potential sources of ignition were taken into account.

The calculated ignition frequency of both appliances was found to be extremely low (less than one ignition event per million DR over a ten-year period or one event per 100 million SACs in 10 years. The frequency of secondary fires was found to be 10 times lower than that of ignition) which goes to show that the risk associated with large-scale application of R290 in SACs is negligible.

Comparative risk assessment of hydrocarbon refrigerant in a refrigerator and split air conditioner, D. Colbourne
This paper was presented during the recent Gustav Lorentzen Conference (GL2014) in China.
It can be downloaded in Fridoc database (free for IIR members within their free download quota):http://www.iifiir.org/clientBookline/service/reference.asp?INSTANCE=exploitation&OUTPUT=PORTAL&DOCID=IFD_REFDOC_0012160&DOCBASE=IFD_REFDOC_EN&SETLANGUAGE=EN
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