Re: cooling door

[John Curran <jcurran () mail com>]

At 3:17 PM +0000 3/29/08, Paul Vixie wrote:
> page 10 and 11 of <http://www.panduit.com/products/brochures/105309.pdf> says
> there's a way to move 20kW of heat away from a rack if your normal CRAC is
> moving 10kW (it depends on that basic air flow), permitting six blade servers
> in a rack.  panduit licensed this tech from IBM a couple of years ago.  i am
> intrigued by the possible drop in total energy cost per delivered kW, though
> in practice most datacenters can't get enough utility and backup power to run
> at this density.

While the chilled water door will provide higher equipment
density per rack, it relies on water piping back to a "Cooling
Distribution Unit" (CDU) which is in the corner sitting by your
CRAC/CRAH units.  Whether this is actually more efficient
depends quite a bit on the (omitted) specifications for that
unit...    I know that it would have to be quite a bit before
many folks would: 1) introduce another cooling system
(with all the necessary redundancy), and 2) put pressurized
water in the immediate vicinity of any computer equipment.

/John