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

[Ken Woods <kwoods@verio.net>]

If you've got a room full of 12000's and 7500's, then you don't need to be
asking questions about power consumption, you need to start your own power
company.

It's all about averages.
You take the AVERAGE power consumption of all the racks.
But you knew that.
Or, *ahem*, I hope you did.

Nevertheless, you don't (or, shouldn't) plan your power consumption with
amperage anyhow.  Use kva.

(8.334A= 1kva)

It's late.  Bed time.


On Wed, 8 Dec 1999, Dave Siegel wrote:

> > > Wouldn't 100A per rack be a good number? That's what I am using, then
> > > aggregating actual as we grow i.e. I'm not installing full load of
> > > 10 tonners everywhere, just half and adjusting as we fill an average
> > > of 50-80Ksq.f
> > 
> > What?
> > You've _got_ to be kidding.
> > 100A per rack?
> > Short of a small load bank, I don't know how you could do that.
> 
> A Cisco 12012 requires 2 -48VDC 60A circuits.  3 6509's require 6 20A 110VAC, 
> and would fit in a single rack.  Larger routers require even more current.
> 
> I'm not a web server guy, but I'd imagine that 32 1RU PII's would consume
> a fair amount of current oo.
> 
> 100A/rack seems like a reasonable specification.  It's cheaper to install
> lots of power at the offset than it is to retrofit and run additional
> power case by case after the facility is opened.
> 
> Dave
> 
> 

-- 
Ken Woods
kwoods@verio.net