thinking outside the box here
I don't know if the room is on a wall where this could work, but you may
want to take a look at the coolerado systems (www.coolerado.com). I
haven't used these, but they claim to get the energy efficiency of a swamp
cooler without adding humidity to the air (~450 W of power for ~36000 btu
of cooling), it actually works more efficiently with higher temperature
incoming air, but it does use water as well.
it is also a much simpler unit (no compressor needed), but you have a
significant amount of ducting needed to get the air moved around.
you may want to talk to them, since you are needing to cool the
datacenter, it may be that the right thing to do is to put one of these
units in the server room and duct the hot, moise air out from there (and
have a good filter on the source of the replacement air that will then get
sucked into server room)
David Lang
On Tue, 23 Aug 2011, Jason Healy wrote:
We're a school with a small server room that we're trying to keep cool (about 4
racks, plus some telco gear). We have a dedicated AC unit in the room right
now, but it isn't able to keep up with the load in the space we have (the
airflow isn't great). Room is hovering around 75 F with AC on full blast 24/7.
On hot days it gets worse, and if the unit were to fail we'd go over temp
pretty quickly.
Called in a few vendors like APC and Leibert, and they're pitching an in-row or
wall-mount unit, but it's pretty pricey. Meanwhile, our regular AC vendor is
pitching another wall-mount unit similar to what we have in the room already:
http://www.e-comfortusa.com/products/mitsubishi-pkaa24ka4--puya24nha4-mr-slim--wall-mounted-mini-split-ac-cooling-only-system--24000-btu/5543
On the one hand, the "normal" unit is much cheaper. However, it lacks a few
nice features (SNMP reporting on errors, for example, should a pump fail). Given that
the unit we have can't keep up, I'm not sure if I want another of the same type.
Meanwhile, APC/Leibert are telling me that I'm crazy to consider another
"comfort" unit in this space, as they're not rated for this kind of use. The
units they sell are pretty and shiny, but are 5x the price (plus installation). I feel
like the in-row form factor might help us, as it would suck more hot air from the back of
the rack rather than let it mix into the room.
I need a little help cutting through the FUD on this one. Is "comfort" cooling so much
worse that it's worth the extra $$$ for a data-center unit? Since we're a school, I need to save
where I can (I'm also trying to get some better UPS in this room, so money I save on cooling can go
towards power). Since the space isn't a "proper" data center (no hot/cold aisle, no
raised floor, etc), I'm not sure where I should prioritize my funding.
Any thoughts for cooling on a tight budget?
Thanks,
Jason
--
Jason Healy | [email protected] | http://www.logn.net/
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