Rack / Enclosure / Node Zero temperatures & cooling solutions

["Martyn Wendon" <martynwendon@xxxxxxxxxxx>]

Just thought I'd see what sort of temperatures people are experiencing in
their racks / enclosures / node zeros and what, if any, cooling systems are
in place.

I've just recently finished building a rack in my garage to move all my kit
from into (my office is soon being re-claimed as a bedroom).

The rack is about 900 * 800 * 2100 with 4 shelves (mdf with holes
cross-drilled for improved airflow.  150mm extractor fan sucking in cool
air
from the concrete garage floor at the bottom and 150mm extractor fan
sucking
out hot air at the top (ducted outside of garage through roof).  Fans are
controlled by a simple central heating style room thermostat wired in
reverse so that the fans come on when the temperature hits 28 deg C.

So far I'm getting:

20.35 deg C on garage floor
26.38 deg C at bottom of rack
34.19 deg C at top of rack

Temperature outside is currently 30 deg C and the extractor fans have been
on constantly pretty much all day.

Previously with all the kit in my office the temperature was hitting 36 deg
C plus last summer - and that was with one of those cheapie B&Q aircon
units
on pretty much constantly too!

Currently the office is sitting at 29 deg C with no aircon and just my main
PC with 2 * 21" monitors and UPS left in there.

So far I think the rack has been pretty successful as I'm saving bundles by
not having the aircon on 24/7.  I figure that if the maximum temperature
that the rack reaches is less than the maximum that my office was getting
to
last year then that's got to be better?!?!




Martyn





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