> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Mark Kosmowski > Sent: Thursday, September 18, 2008 12:19 PM > To: beowulf@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@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
