[42444] in North American Network Operators' Group
generator cooling (Re: Re[2]: telehouse - 25 broadway)
daemon@ATHENA.MIT.EDU (E.B. Dreger)
Sun Sep 16 12:23:53 2001
Date: Sun, 16 Sep 2001 16:23:10 +0000 (GMT)
From: "E.B. Dreger" <eddy+public+spam@noc.everquick.net>
To: Alex Rubenstein <alex@nac.net>
Cc: Sean Donelan <sean@donelan.com>,
"nanog@merit.edu" <nanog@merit.edu>
In-Reply-To: <Pine.WNT.4.33.0109161144500.1280-100000@neon>
Message-ID: <Pine.LNX.4.20.0109161546060.6403-100000@www.everquick.net>
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Errors-To: owner-nanog-outgoing@merit.edu
> Date: Sun, 16 Sep 2001 11:45:26 -0400 (Eastern Daylight Time)
> From: Alex Rubenstein <alex@nac.net>
>
> From what I've heard from 32 Old Slip, the reason for thier
> generators to fail was that the intake filters were clogged from
> the concrete dust in the air.
Hmmmm.... although this situation is far from one's typical
power outage, maybe one should not rely on the radiator.
Ass-u-ming that one has a steady supply of water:
s/radiator-cooled water/external water supply/
It works the same. The only purpose of the radiator is to
facilitate cooling _without_ an external water supply, to reuse
the existing water.
Yes, a contastly-flowing external water supply is wasteful. So
we make it "emergency only". Note that the numbers represent
thermostat temperatures in degrees Fahrenheit[1], and the arrows
signify flow direction (check valves and water pump omitted for
simplicity):
~~~~~~
supply
~~~~~~
|
V
+------<------+
| |
V |
+--------+ |
| engine | ^
+--------+ |
| |
V |
+-----+ |
| 165 | ^
+-----+ |
| |
V |
+----------+ |
| radiator | ^
+----------+ |
| |
V | +-----+
+------>------+--->----| 195 |
+-----+
|
V
~~~~~
drain
~~~~~
[1] Apologies to the standards-abiding, metric-loving people out
there. I just don't feel like converting right now. :-)
Save for the high-temp thermostat and the external water supply,
it looks remarkably like a standard system with overflow. The
big disadvantage to this design is that, if one runs out of
water, this _will_ overheat. But overheating is imminent when
the high-temp thermostat opens (a prerequisite for running out
of water), so we were SOL anyway.
> -- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben --
> -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
Eddy
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