[Beowulf] small cluster cooling / beer fridges
Lux, James P
james.p.lux at jpl.nasa.gov
Thu Sep 18 16:44:03 EDT 2008
> -----Original Message-----
> From: beowulf-bounces at beowulf.org
> [mailto:beowulf-bounces at beowulf.org] On Behalf Of Mark Kosmowski
> Sent: Thursday, September 18, 2008 12:19 PM
> To: beowulf at beowulf.org
> Subject: [Beowulf] small cluster cooling / beer fridges
> > Questions (same RGB asked):
> > What environmental conditions should such an office have?
> > 1.5ton A/C?
> > 4kW capable wiring?
> > Beer keg refrigerator?
> > How many air vent and drip holes on the walls, ceiling and windows?
> Assuming the physical dimensions work, would condensation (or anything
> else) be a problem if someone, say a crazy grad student in
> his non-AC basement, were to put a few desktop nodes in a
> used, cleaned refrigerator?
No big problem. The condensation will tend to be on the cold coils. However, refrigerators don't move very much heat though. A 100W lightbulb would probably overpower the refrigeration capacity. They're also optimized for a delta T of 30-40 degrees F (i.e. keep the insides at 40 when the room is at 75)
If you're buying, you're much better off getting a small airconditioner, especially one of the ones that has a hot air outlet duct you can shove in a window. Even small $100 room A/Cs move 5000 BTU/hr (1000 BTU is 1054 kJ... A 200W PC is dissipating 720 kJ/hr.. So a 5000 BTU/hr unit will just keep up with a 1kW load). Even better would be a "mini split" AC, which puts the hot part outside, but they're pretty pricey. The room AC is optimized for a smaller delta T, though.
For power into the fridge, a
> hole could be drilled into the hull and then filled in with
> closed cell foam once the cords are poked through.
Careful there.. They run wires and pipes in the walls, particularly on those 2-4 cu ft "dorm refrigerators" and kegerators. I did my part contributing to global warming by not knowing this. A better solution is to cut a slit/notch in the door gasket. The door is also usually less likely to have critical components imbedded in it.
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
More information about the Beowulf