[90840] in North American Network Operators' Group
Re: WSJ: Big tech firms seeking power
daemon@ATHENA.MIT.EDU (Matthew Crocker)
Fri Jun 16 16:16:53 2006
In-Reply-To: <63ac96a50606152326j43f41ad8gbeabd121d612e543@mail.gmail.com>
From: Matthew Crocker <matthew@crocker.com>
Date: Fri, 16 Jun 2006 16:16:14 -0400
To: nanog@merit.edu
Errors-To: owner-nanog@merit.edu
> 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
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