Re: rack power question

this has been, to me, one of the most fascinating nanog
threads in years.

at the moment my own datacenter problem is filtration.  isc
lives in a place
where outside air is quite cool enough for server inlet
seven or more months
out of the year.  we've also got quite high ceilings.  a 2HP
roof fan will
move 10000 cubic feet per minute.  we've got enough make-up
air for that.
but, the filters on the make-up air have to be cleaned
several times a week,
and at the moment that's a manual operation.

mechanical systems, by comparison, only push 20% make-up
air, and the filters
seem to last a month or more between maintainance events. 
i'm stuck with the
same question that vexes the U S Army when they send the
M1A1 into sandstorms,
or that caused a lot of shutdowns in NYC in the days after
9/11: what kind of
automation can i deploy that will precipitate the
particulates so that air
can move (for cooling) and so that air won't bring grit
(which is conductive)?
-- 
Paul Vixie

> what kind of automation can i deploy that will 
> precipitate the particulates so that air can move (for

> cooling) and so that air won't bring grit (which is
conductive)?

Have you considered a two-step process using water in the
first
step to remove particulates (water spray perhaps?) and then
an
industrial air-drier in the second step?

Alternatively, have you considered air liquifiers like
those
used in mining (Draegerman suits) which produce very cold
liquid
air? The idea would be to spray the liquid air inside the
data 
center rather than blowing in the gaseous form.

Of course, I don't know if the economics of this work out,
although
there are people working on increasing the efficiency of
air
liquification
so there is quite a bit of price variation between older
methods and
newer ones.

--Michael Dillon

This thread begs a question - how much do you think it'd be
worth to do
things more efficiently?




Adrian

$5


Adrian Chadd wrote:
> This thread begs a question - how much do you think
it'd be worth to do
> things more efficiently?
>
>
>
>
> Adrian
>   

That would be pretty good. But seeing some of the disastrous
cabling
situations it'd have to be made pretty idiot proof.

Nice double sealed idiot proof piping with self-sealing
ends..

--
Leigh


--
Leigh

Alexander Harrowell wrote:
> I still think the industry needs to standardise water
cooling to popularise
> it; if there were two water ports on all the pizzaboxes
next to the RJ45s,
> and a standard set of flexible pipes, how many people
would start using it?
> There's probably a medical, automotive or aerospace
standard out there.
>
> On Tue, Mar 25, 2008 at 12:23 PM, Leigh Porter
<leigh.porterukbroadband.com>
> wrote:
>
>   
>> $5
>>
>>
>> Adrian Chadd wrote:
>>     
>>> This thread begs a question - how much do you
think it'd be worth to do
>>> things more efficiently?
>>>
>>>
>>>
>>>
>>> Adrian
>>>
>>>       
>
>   

Once upon a time, Dorn Hetzel <dhetzelgmail.com> said:
> Of course, my chemistry is a little rusty, so I'm not
sure about the
> prospects for a non-toxic, non-flammable,
non-conductive substance with
> workable fluid flow and heat transfer properties 

Fluorinert - it worked (more or less) for the Cray Triton.
-- 
Chris Adams <cmadamshiwaay.net>
Systems and Network Administrator - HiWAAY Internet
Services
I don't speak for anybody but myself - that's enough
trouble.