Comments on: Validating Some Power/Cooling Cost Assertions http://www.douglasgourlay.com/blog/2010/02/validating-some-powercooling-cost-assertions/ Data Centers, Virtualization, and Cloud Computing Sun, 02 May 2010 01:04:25 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Danny http://www.douglasgourlay.com/blog/2010/02/validating-some-powercooling-cost-assertions/comment-page-1/#comment-326 Danny Thu, 08 Apr 2010 18:49:55 +0000 http://www.douglasgourlay.com/blog/?p=202#comment-326 Interesting blog. Enterprises should buy a few of these http://mysolar.cat.com/cda/layout?m=177311&x=7. Just an idea... Also, I looked at some of the older polls. Don't you need a "Cowboy Neal" option? I thought that is how these tech sites were supposed to roll. But what does a mechanical engineer know of such things... Interesting blog. Enterprises should buy a few of these http://mysolar.cat.com/cda/layout?m=177311&x=7. Just an idea…

Also, I looked at some of the older polls. Don’t you need a “Cowboy Neal” option? I thought that is how these tech sites were supposed to roll. But what does a mechanical engineer know of such things…

]]> By: PHY Guy http://www.douglasgourlay.com/blog/2010/02/validating-some-powercooling-cost-assertions/comment-page-1/#comment-288 PHY Guy Tue, 02 Mar 2010 17:29:15 +0000 http://www.douglasgourlay.com/blog/?p=202#comment-288 Sorry if I'm simply restating the math you've already done, but it might help to approach this from a "how many kWh are there in a {month, year, ...}" angle. A 1kW load draws 1kWh of energy every hour (duh!), or 720 kWh in a 30-day month. If electricity costs about $0.10/kWh (that's in the ballpark for my residential bill), then your 1kW load consumes $72 of electricity per month, without cooling. If you factor in cooling, that $155/month/kWh is totally within the ballpark. Another neat corrolary is that at $0.10/kWh, each Watt of power running continuously costs you about a dollar per year to run. (365 * 24 is close enough to 10k hours, so a 1kW load running 24/7 all year long consumes 10k kWh, or $1k worth of electricity -- each Watt costs you a buck. So your always-on TiVo probably slurps up $100/year in electricity! Sorry if I’m simply restating the math you’ve already done, but it might help to approach this from a “how many kWh are there in a {month, year, …}” angle.

A 1kW load draws 1kWh of energy every hour (duh!), or 720 kWh in a 30-day month. If electricity costs about $0.10/kWh (that’s in the ballpark for my residential bill), then your 1kW load consumes $72 of electricity per month, without cooling. If you factor in cooling, that $155/month/kWh is totally within the ballpark.

Another neat corrolary is that at $0.10/kWh, each Watt of power running continuously costs you about a dollar per year to run. (365 * 24 is close enough to 10k hours, so a 1kW load running 24/7 all year long consumes 10k kWh, or $1k worth of electricity — each Watt costs you a buck.

So your always-on TiVo probably slurps up $100/year in electricity!

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