odorless, colorless, tasteless plus deadly and silent--given the wrong
circumstances.
Hi,
"whiff of hydrogen"?
I had always assumed you couldn't smell hydrogen. Does
anyone know one way or the other?
Thanks,
Ray
--- "Dan H." <jmachine@adelphia.net> wrote:
> Steve,
>
> I'm not a battery expert and wasn't going to respond
> to this thread but since your life may hang in the
> balance, I'll respond. :-)
>
> Most of the hydrogen produced from batteries is
> produced on charging. Some is produced on
> discharging, but not much. No matter whether
> charging or discharging, there is always hydrogen
> present at the top of each cell within the battery
> and it oozes out.
>
> It's best to keep the batteries away from anything
> that could possible ignite it, or in a safe place
> incase they do go off. That's one advantage of
> having them in a separate pod. The other advantage
> is the room it frees up in the hull. The
> disadvantages are, some method of venting while
> charging has to be provided for and a battery in a
> pod isn't as easily gotten to for service. Also
> there are weight factors and the expense of a
> separate pressure pod etc. etc.
>
> There are Hydrocaps available which absorb the
> hydrogen, and convert it to water I believe, but
> they have their flaws too. I don't know of a
> scrubber for a battery pod, but it sounds plausible.
>
>
> My batteries are in pods, and don't have Hydrocaps
> but I have pod vent caps I open while charging. The
> vents vent into the hull so I can charge while in
> the water but I must leave the sub hatch opened.
> While in use, the vents are capped off with heavy
> pipe caps. The end of each battery pod on my sub
> are made so an explosion will blow the pod end off,
> and hopefully not impact the hull.
>
> One thing I've noticed is, I don't get a whiff of
> hydrogen when I open my pod vents after use and
> before charging. So I assume what I was told about
> most of the hydrogen being produced during charging,
> and not while in use, is true.
>
> Damn I'm long winded, but hey, if it could save a
> life, I'll talk! ;-)
>
> Take care, Dan H.
>
>
> ----- Original Message -----
> From: Stephen Pearce
> To: personal_submersibles@psubs.org
> Sent: Wednesday, April 12, 2006 4:51 AM
> Subject: [PSUBS-MAILIST] Hydrogen Build-up
>
>
> G-day all
>
>
>
> From the material I have been reading and what I
> remember Hydrogen gas is formed in lead acid
> batteries when charging and dischrgeing. My
> understanding is that if you ventilate the battery
> compartment with the atmosphere when running on the
> surface and the air in the pressure hull when
> submerged this can stop a BIG BANG!
>
>
>
> Can anyone suggest the amount of Hydrogen as a %
> of the Subs atmosphere is required for an explosion
> to occour? Is there such a thing as a Hydrogen
> Scrubber? Is hydrogen produced more readerly when
> charging or discharging the batteries.
>
>
>
> By contributing to this string the life you save
> could be mine<J
>
>
>
> Regards
>
>
>
> Steve P
>
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