Quote:
Originally posted by eXtenz
Ya, i havn't made up my mind yet, im either gonna go with a upright chest freezer, about 5cu ft... or a mini fridge, or a ac unit =p as for the r134a, i was gonna see what i get, see how well it performs, if i like it enough ill keep it for the time beeing, if not then i will have it converted over to r22 or some shit =p, as to the methanol i dunno not real kin to it, i found some isopropyl, freezing point is much better then methanol but its not really a good heat transfer'er so im still thinkin about what to use... any ideas? other then isopropyl alcohol (91% alcohol 9% water) or methanol
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Water's one of the best heat transfer liquids in the running, so you want to have as much water in there as possible.
I'd suggest at least 50% water if you can get away with it. And keep in mind your isopropyl alcohol is probaby about 30% water.
It's not enough to keep the stuff from freezing, though. If it's too close to its freezing point, its viscosity will be pretty high, which means your water pump will be badly stressed.
And methanol's freezing point is slightly lower than isopropanol.
Methanol -98C
Isopropanol -88C
Alchemy