Re: Little Giant Pumps

["Lee John Droege" <leejohndroege@hotmail.com>]

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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