View Single Post
Unread 05-06-2006, 07:19 PM   #4
Ice Czar
Cooling Neophyte
 
Join Date: Sep 2001
Location: High Altitude Lab
Posts: 94
Default Re: Dielectric Coolants

you want this

not sure where the charts are if they are anywhere still (they generally escape even the internet archive)

http://forums.procooling.com/vbb/pri...2&page=1&pp=25

most of your "cold" range heat transfer fluids are going to be hydrocarbon based
I did considerable research into this about 4 years ago (which is about as old as that thread cited )
the expensive Perfluorocarbons are really the best solution, but as you have mentioned, sealing against them, the expense is tough, I actually have some pics of the stainless steel plumbing on the Cray that used to be up at NCAR. Unfortunately they are on a RAID array that is currently offline.

Methanol's drawbacks as both flammable and toxic require nearly the same level of plumbing and precautions that make the flurocarbons such a pain, I came to the conclusion - in for a dime in for a dollar

there are also brine solutions but not as low as your talking about
methanol is a solution but with different tradeoffs

expand your searching to spray cooling
and dual phase change microchannels
that might be the justification youd need to go back to Perfluorocarbons

the trick is finding a pump, getting the plumbing done and making it a totally closed system that doesnt have evaporative issues.
__________________
LurkyLoo

Last edited by Ice Czar; 05-06-2006 at 07:39 PM.
Ice Czar is offline   Reply With Quote