WSJ: Big tech firms seeking power

Fri Jun 16 20:16:14 UTC 2006

> 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