Ok, using this resource as a base I found out a couple of interesting things that can help out my testing.
http://www.ashland.com/pdfs/technica...sh%20Point.pdf
(Color coded to make things a little easier on the eyes)
Liquid in the Cooler
Liquid in the Loop
90% Alcohol / 10% Water: Freezes @ -57C
70% Ethylene Glycol / 30% Water: Freezes @ -64C
The Alcohol / DICE in my cooler was pretty much a frozen paste and the anti-freeze in the loop ended up as a frozen slush. So the above specs do make some sense in my real world tests.
90% Alcohol / 10% Water: Freezes @ -57C
50% Methanol / 50% Water: Freezes @ -54C
60% Methanol / 40% Water: Freezes @ -71C
Methanol / Water may be worthy of a test run. Just need to make sure I have a fire extinguisher ready
I could also test a lower grade Alcohol which would raise the freezing point. That would help keep the cooling medium from freezing and still be sub-zero.
70% Alcohol / 30% Water: Freezes @ -29C
50% Ethylene Glycol / 50% Water: Freezes @ -34C
Might run the latter test today....or tomorrow.
OCM
