Not sure I'd be too keen using a plate hx. I did think about it at the beginning but discarded the idea due to the pressures involved. The other thing to bear in mind is the velocity the gas travelles through the system - I've no idea what that is mind, but reading anything written re refrigerants and they frown upon anything that impedes refrigerant flow.
I did start looking for a titanium or stainless steel hx designed for use with refrigerant/water but in the end opted for my own design. There are a few Chinese manufacturers but I didn't find any supplier of sensibly priced units.
Why not put a cheap pressure release valve in the water circuit to prevent over pressure or make the body out of some steel tube - a fire extinguisher or gas bottle springs to mind.
Nigel
|