Re: WSJ: Big tech firms seeking power

["Alexei Roudnev" <alex () relcom net>]

I used very raw estimation (which is not well correct but dont make too much
of errors)  - to remive 1 KW out of building, yiou spend extra 1 KW.

But anyway, 450,000 servers have a great power consumption - you can use
river or a lake to cool them, but you still need 45,000 KW of power to make
them work. So, to say 60,000KW - 100,000KW will nopt be a big mistake (total
power consumption).

Of course, if you build data center inside the the power plant dam, then you
have both, enough cooling and enough power. -:)


----- Original Message ----- 
From: "Matthew Crocker" <matthew () crocker com>
To: <nanog () merit edu>
Sent: Friday, June 16, 2006 1:16 PM
Subject: Re: WSJ: Big tech firms seeking power


> > I wonder just how much power it takes to cool 450,000 servers.
>
> 450,000 servers * 100 Watts/Server = 45,000,000 watts / 3.413 watts/
> BTU = 13.1 Million BTU / 12000 BTU/Ton = 1100 Tons of cooling
>
> A 30 Ton Liebert system runs about 80 amps @ 480 volts or 38400
> watts,  you'll need at least 40 or them to cool 1100 tons which is
> 1536 Kw * 24 hours * 7 days * 4.3 weeks = 1,110,000 KwH/month * $0.10/
> KwH = $111,000 /month in cooling.
>
> I think my math is right on this...
>
> --
> Matthew S. Crocker
> Vice President
> Crocker Communications, Inc.
> Internet Division
> PO BOX 710
> Greenfield, MA 01302-0710
> http://www.crocker.com