Refrigerants and The Environment

[US Iceman]

As you say, this is the hard part. The pumps would have to boost the pressure to a fairly high pressure, so that the flash gas formed during the expansion process would be able to provide defrost gas above 0C, right?

[Andy]

As you say, this is the hard part. The pumps would have to boost the pressure to a fairly high pressure, so that the flash gas formed during the expansion process would be able to provide defrost gas above 0C, right?

Pressure is about 6 to 8 deg c from memory, although it is highly superheated, I suppose you could use a lower saturation pressure, say -5 deg c, but you would need very large volumes of highly superheated vapour to perform any sort of defrost.

Kind Regards. Andy