[103318] in North American Network Operators' Group
Re: rack power question
daemon@ATHENA.MIT.EDU (Petri Helenius)
Tue Mar 25 16:38:17 2008
Date: Tue, 25 Mar 2008 22:36:11 +0200
From: Petri Helenius <petri@helenius.fi>
To: Paul Vixie <vixie@isc.org>
CC: nanog@merit.edu
In-Reply-To: <g3iqzahk4q.fsf@sa.vix.com>
Errors-To: owner-nanog@merit.edu
Paul Vixie wrote:
>
> this is a strict business decision involving sustainability and TCO. if it
> takes one watt of mechanical to transfer heat away from every watt delivered,
> whereas ambient air with good-enough filtration will let one watt of roof fan
> transfer the heat away from five delivered watts, then it's a no-brainer. but
> as i said at the outset, i am vexed at the moment by the filtration costs.
>
Have you made any calculations if geo-cooling makes sense in your region
to fill in the hottest summer months or is drilling just too expensive
for the return?
Pete
