COTS cooling

[Robert B Heckendorn]

We don't have to pay for the cooling but the cost of the installation
of cooling is being used as an argument to cut corners on the machine
itself.  :-( So I would love to get the cost of the installation of
cooling down.

One of the responses to my mail said:

"We just purchased ~150 dual AMDs, and are cooling them with 4 Fujitsu
ceiling-mounted air-conditioners: about 50kW of AC cost us about $25k,
which is about 10% of the cost of the machines."

This sounds like COTS cooling to go with our COTS machines.  :-) It
has the nice feature that if one AC goes out the others keep running.
It is also nice in that half a dozen 125KBTU/hr units in the ceiling
would seem to handle a fairly large load and all machines for the next
4 years of expansion.

450W/dualnode * 3.4BTU/hr/W * 400 nodes  = 612K BTU/hr

Does anyone else comments on this scheme (pros or con)?
Is anyone doing anything like this?



-- 
| Robert Heckendorn                        | We may not be the only
| heckendo at cs.uidaho.edu                   | species on the planet but
| http://www.cs.uidaho.edu/~heckendo       | we sure do act like it.
| CS Dept, University of Idaho             |
| Moscow, Idaho, USA   83844-1010          |