Oil will expand and contract with a change in temperature. So if the
battery storage was filled at the surface on a warm day with warm oil and
then spent an hour or so in cold water, then you'd have a vacuum
until you gave it time to warm back up. Right?
Doug J
In a message dated 2/2/2005 12:18:46 PM Central Standard Time,
SFreihof@aol.com writes:
Don't
get confused. A barrel of oil, with no air, will not sink to the
Titanic. Oil is lighter than water and will float, not
sink.
Hydrocaps are a catalyst which should not change the pressure in
the battery pod. The catalyst simply combines hydrogen gas and oxygen
gas to form water, without the explosion characteristic of this exothermic
reaction. I suggested to you that another reaction may be causing the
pressure drop. I suspect some oxygen (O2) is being tied up in PbO2:
Pb +
O2 ---> PbO2
but that's a guess.
Relevant chemical
reactions:
Pb + 2H2SO4 + PbO2 <---- Charging 2PbSO4 +
2H2O
Discharging---->
Hydrolysis: 2H2O ----> 2H2 +
O2
I'm not sure why a vacuum happens, but knowing that it happens
enables you to plan for it if you intend to use
hydrocaps.
Stan
In a message dated 2/1/2005 12:59:16 AM Eastern
Standard Time, "Akins" <lakins1@tampabay.rr.com>
writes:
>Thanks for correcting me on that Stan. For some reason I
interpreted writings here as meaning the water floated atop the acid in a
seperate layer. Good to know my first notion was correct after
all.
>
>I already understood that the oil filled pod stopped any
water pressure as in your baloon analogy below. Learned that a long time ago.
Drop a barrel totally filled with oil and no air into the ocean and it will
sink to the titanic with no water pressure
>
>affecting it.
Water-uncompressable. Oil-uncompressable. Ergo--no water pressure effect on
totally oil filled container.
>
>But what I do not understand and
need help on is this....
>
>How EXACTLY does that vacuum that
Vance and others mentioned form in a battery pod if you are using hydrocaps?
If the hydrocaps are having to rob the ambient air in the pod for oxygen to
create water because there is not enough oxygen from the original seperation
of the water into hydrogen and oxygen for them to totally recombine again,
then where did that originally seperated oxygen go and whereever it went, what
is it doing?
>
>I believe someone mentioned it somehow formed an
oxide? But they only briefly mentioned it and did not elaborate. Is this
correct? If it is, then what happens to make the oxygen bond and get trapped
making an oxide so that it can't recombine with the hydrogen? Does ALL of the
oxygen that was seperated go into making an oxide, or is any of it left to
recombine with the hydrogen? I have to know this before I can understand why
the vacuum forms.
>
>Thanks Stan.
>Kindest
Regards,
>Bill Akins.
>
>
> ----- Original
Message -----
> From: SFreihof@aol.com
> To:
personal_submersibles@psubs.org
> Sent: Tuesday, February 01, 2005
4:11 PM
> Subject: Re: [PSUBS-MAILIST]
Psubs-for-Dummies
>
>
> Hang in there Bill, you were
right before...
>
> The water and the acid are mixed... They
do not form separate layers in the battery. When I refer to the water in
the battery, I am referring to dilute sulfuric acid. Water mixes with
the acid and dilutes it.
>
> In an oil-filled lead acid
battery, the oil floats on the dilute acid....
>
> This is
not a complex concept. Take a balloon and fill it with air. Take
it 10 feet underwater. The balloon will shrink because the water
pressure compresses the air inside until the air pressure inside the balloon
equals the water pressure outside. Boyle's law, pressure and volume of a
gas: since the pressure is more, the volume is less. Now take an
identical balloon and fill it with water. Submerge it 100 feet
underwater and it doesn't get any smaller because the increased pressure
doesn't compress the water.
>
> Now, instead of a balloon,
think of a battery box...filled with lead, acid, and oil, all non-compressible
materials...
>
>
Stan
>
>
************************************************************************
************************************************************************
************************************************************************
The
personal submersibles mailing list complies with the US Federal
CAN-SPAM
Act of 2003. Your email address appears in our database
because
either you, or someone you know, requested you receive messages
from our
organization.
If you want to be removed from this mailing list simply
click on the
link below or send a blank email message to:
removeme-personal_submersibles@psubs.org
Removal of your email address
from this mailing list occurs by an
automated process and should be
complete within five minutes of
our server receiving your
request.
PSUBS.ORG
PO Box 311
Weare, NH
03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************
|