back to the issue of cooling
hahn at physics.mcmaster.ca
Mon Apr 21 18:23:10 EDT 2003
> Sorry to keep kicking a dead horse guys, but the issue of increasing
> thermal efficiency in large clusters and data centers has been keeping
> me awake at nights.
wow. you need to get a cluster of your own to worry about ;)
> Has anyone tried to use a stirling engine or other
afaikt, this sort of thing depends on the presence of a substantial
temperature differential, not just a lot of energy. my machineroom
dissipates around 35 KW, but the return air isn't supposed to get
above about 30C (unlike today, when we hit 35.8 :( )
I have a vague recollection that the efficiency of heat engines is
strongly dependent on the temp differential, which would be only about 20C
assuming our chilled water stayed chilled...
> order to recover some of the heat energy that would simply be wasted at a
> large facility. Could this be economically viable?
I think it would be more effective to reduce at the source. for instance,
my ES40's have 2-of-3 redundant power supplies, which seem to dissipate
a lot more heat than another cluster which has 1-of-2. of course, the mere
fact that we're using Alphas is a declaration of war on coolness ;)
I hear those Opterons are pretty cool...
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