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From: Larry N. Brown (no email)
Date: Thu Apr 19 2007 - 19:07:28 EDT
> "...so there's no "breathing" thru the vents which means no
> condensation...."
>
> Not so......blocking up a tank vent will not eliminate internal
> condensation.
> It's due to moisture already within the tank air condensing when outside
> temperatures change rapidly. It's more likely to make it worse.
>
> It's one reason gas line antifreeze is recommended for cars at the start
> of
> the cold season when temperatures plummet.
>
> Rob Brueckner
> Hatteras YF
Since several of the hoary, hairy dog threads - 30/10/2 micron Racors,
endless dink advantages/disadvantages, AC vs. DG gensets, single vs. twin
discussions, how many amp-hours can dance on the head of a pin?- allow me to
resurrect a thread, long dead, that is germane to this issue. I shall do so
by paraphrasing two posts and the list can go from there. By the way,
whatever happened to Alex?
(1) Was it Paul Krug, the fellow who was in charge of all the diesel
equipment for Cape Canaveral, who said to give him any "spoiled" diesel you
had? He'd take it, polish it and use it in his boat. He'd go to remote
launch monitoring sites in Asia and Africa, taking GCF F-1's and plenty
rolls of Bounty paper towels. These sites were neglected for years and he'd
go through a case or two of paper towels and fire up the generators. They
always ran fine.
(2) I also recall a sprightly thread on the hygroscopic nature of diesel
oil. As I recall the discussion, diesel generates far more water in a tank
by hygroscopic action than by condensation. That is to say, if you have a
full tank, there's a lot more mass of fuel to operate as a hygroscopic
"pump" than if the tank is nearly empty. The nearly empty tank will surely
produce more condensation but that's not the point. The point is how much
water gets to the bottom of the tank to allow "bugs" to react with the fuel.
Now here's a basis for a lively thread.
Hygroscopically yours,
Regards,
Larry & Teri Brown
MV Cigano, 47' Prairie Sundeck
Still glued to the dock in Covington, LA
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