Re: Little Giant Pumps

["Gamble family" <dgamble1@bigpond.net.au>]

You can see the Toxic data sheets for Ethylene and Propylene Glycol at
http://www.atsdr.cdc.gov/tfacts96.html

According to http://www.dhmo.org/ Dihydrogen  monoxide can also be fatal in
quantities as little as 100 ml. I suspect Tom may have at least this amount
sloshing around in his cooling system!

----- Original Message -----
From: Lee John Droege <leejohndroege@hotmail.com>
To: <tdroege@veriomail.com>; <tass@listserv.wwa.com>
Sent: Monday, March 26, 2001 9:55 AM
Subject: Re: Little Giant Pumps


> from Lee John Droege--- Brother of Tom
>
> ETHYLENE GLYCOL:Lethal dose for man reported to be 100ml! Enough said.
>
> (SAX 1963)
>
>
> >From: Tom Droege <tdroege@veriomail.com>
> >To: tass@listserv.wwa.com
> >Subject: Little Giant Pumps
> >Date: Sun, 25 Mar 2001 16:40:27 -0600
> >
> >Sigh!  I have spent the last few hours with anti-freeze dripping off my
> >chin.  Everything is on the floor and I have to crawl around to fix the
> >water system.  I now have a bare trickle running through the system.  It
is
> >probably enough.  One does not need much.
> >
> >Let's see:
> >
> >Allow a 5 F rise through the system.  There is about 3 amps max drawn by
> >the TECs.  This is 36 watts.  One has to get rid of this plus the heat
> >pumped out of the cold side.  Let's guess 7 watts per camera.  That is
then
> >a total of 50 watts.  This is 170 btu/hr.  170btu/5F = 34 pounds per
> >hour.  At 8 pounds per gal this is 4 1/4 gal per hour.  Hmmm!  I wonder
> >what it is.
> >
> >OK, I measured it.  I am getting 2.2 gph.  So the temperature rise is
more
> >like 10 F.  This means that the down stream camera is seeing 5 F hotter
> >water than the upstream one.  This will cost 2.7 C over what I could get
> >with higher flow.  2.2 gph is really just a trickle.
> >
> >The problem is those nice self sealing disconnects that I use on the back
> >of the camera.  They do not have a very large orifice, and it tends to
get
> >clogged.  So take care.  I have reconnected the water filter even though
it
> >causes a pressure drop.
> >
> >I think I need a Medium Giant pump instead of a Little Giant.
> >
> >Tom Droege
> >
> >
>
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