Re: DATACENTER: Cooling and Cost Data for Web Hosting Data Centers

[Ken Woods <kwoods@verio.net>]

On Thu, 9 Dec 1999, Ken Woods wrote:

> uhh.....
> I'm not even gonna start.

Actually, now that I've had a few mins to wake up, I've changed my mind.

> On Thu, 9 Dec 1999, scott w wrote:
> > helps.  Got my flame-proof panties on just in case...  ;-)

ewww....
mental image.

> > 1.add up the total DC wattage

1. Why are you using DC?
Are you building a switch facility, or a colo/web hosting facility?
Most of "us" are building colo/hosting.  DC is evil.

> > 2.divide total DC Watts by 0.7 (1 divided by the square root of 2 ~= .7)

2. eh...... Blah.

> > 3.divide by 0.65 to cover for power factor and apparent power correction
> > (rough estimate)

3. See #1.  .65??  I'd say that was "rough".  I've seen as high as .95.  
Course, I've also seen as low as .55.  I guess I don't have a point, other
than to say "thanks" for the formula that I've known, disagreed with, yet
still used for X years.

> > 4.divide by 1000 to get KVA  

4. Yup.


-- 
Ken Woods
kwoods@verio.net
"mah shit work. do yours?"