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Zilvinas
25-09-2016, 02:44 PM
Hello guys,

I would like to design refrigeration system of 1,5 kW cooling capacity. If take to account new f-gas regulation I decided to design system wich will run on R290. To consider compressor is easy, there is a lot of them designed to operate with propane.
My question, is there any special requirement for heat exchangers if I use propane as refrigerant?

Rob White
28-09-2016, 02:04 PM
.

NO, evaporators are fine but be careful with the fans.
The fans need to be X rated so they don't spark.

Rob

1.3.2 TYPE Ex de – FLAMEPROOF MOTORS WITH
INCREASED SAFETY TERMINAL BOX
(according to EN/IEC 60079-1 and EN/IEC 60079-7)
Ex de motors differ from Ex d motors only on the configuration
of terminals and terminal box. The terminal box with increased
safety terminals prevents from any ignition

.