[Beowulf] 96 cores in silent and small enclosure

Lux, Jim (337C) james.p.lux at jpl.nasa.gov
Wed Apr 7 07:41:38 PDT 2010

For electronics cooling..
Mineral oil, usually with a oxidation inhibitor.  Shell Diala AX is what I use.  For HV, dry and clean is important.
If your hardware isn't oil compatible, then a variety of silicones (e.g. Fluorinert) are used (at substantially higher cost).
For really high power density, fluorinert in an ebullient cooling (boiling) mode is used (either by reducing the pressure in the vessel or choosing a coolant with a suitable boiling point (e.g. 40-50C)).  This is a tricky design, though, because though the bubbles rising helps circulation, you have to worry about film formation, etc.

On 4/7/10 7:13 AM, "Hearns, John" <john.hearns at mclaren.com> wrote:

sry for another post but i just got an idea. im not sure if you have
seen that you tube video of a guy who put his whole setup in a fish tank
and was using cooking oil i believe to cool everything. would be
interesting to see the 2nd cluster put into a big enough tank and cooled
with oil.

These systems look to have rotating platter hard drives in them.
substitute for solid state drives and you probably have a better chance
of liquid cooling.

I'd guess having vats of cooking oil in an office environment is a no-no
- what oil do radio hams etc. use for cooling dummy loads for high power
RF work?

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