[Beowulf] Innovative liquid cooling

Jörg Saßmannshausen j.sassmannshausen at ucl.ac.uk
Fri Mar 1 15:27:35 PST 2013


On Freitag 01 März 2013 Prentice Bisbal wrote:
> On 03/01/2013 02:00 PM, Mark Hahn wrote:
> >> For future reference, I just looked up these thermal conductivities:
> >> 
> >> Air : 0.024 W/m-k (at 298K)
> >> Water:  0.58 W/m-k (at 300K)
> >> Mineral oil: 0.162 W/m-k
> >> 3M Novec 7000:  0.075 W/m-k
> > 
> > H2 is 0.168 at 25C.  *that* is what we should all be cooling our
> > clusters with!
> 
> Think of how much we'd save by not needing to reinforce the raised
> floors. Heck, we wouldn't even need raised floors, just some tie-downs.
> 
> Mercury is even better. It's a nice round "8" and it's really easy to
> clean up when it spills, too.

As somebody who is a Chemist and have worked with Mercury I can tell you the 
cleaning up of spilled Mercury is not that easy. Zinc-dust or Sulfur, that is 
the question, but the mess is the same.
Besides, it is heavy and toxic. So not a good choise. :D

Jörg

> 
> >> Sources:
> >> http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html
> > 
> > yeah - weird collection.  salmon and silver; raw potato and portland
> > cement.
> > 
> >> I went with the 3M Novec because it looked like "7000" was written on
> > 
> > good spotting!
> > 
> > thanks, mark.
> 
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-- 
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Jörg Saßmannshausen
University College London
Department of Chemistry
Gordon Street
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WC1H 0AJ 

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