[PSUBS-MAILIST] venting batteries

[Vance Bradley]

Hank,
Any low cost hydrogen vent system will leak. I've seen perfectly tight systems tested with nitrogen that leak like sieves when charged with dive gas. And if you have a leaky system then you have no system. Even a little hydrogen can ruin your whole day.
Vance

Sent from my iPhone

> On Mar 11, 2014, at 4:03 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
> 
> Vance,
> I get that for sure, it just seems logical to vent the battery directly.  What am I missing here?  Why vent the Hydrogen into  a space then vent the space, makes no sense.
> Hank
> 
> 
> On Tuesday, March 11, 2014 10:19:53 AM, Vance Bradley <VBra676539 at AOL.com> wrote:
> Hank,
> The vent system should be used for half an hour prior to charging to clear the keel, then throughout the charge and finally for another half to one hour afterward. What the maintenance log does not say is that somebody forgot to turn on the LP supply air during a charge. It happened once on Delta, too. Bang! Her deck plates all have a slight upward bulge as a result. Oops.
> Vance
> 
> Sent from my iPhone
> 
>> On Mar 11, 2014, at 8:43 AM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>> 
>> Steve,
>> I am thinking interior of the hull.  Gamma has interior batteries sealed in a box.  There is an air system to purge the box after charging.  When I was reading the daily service reports, I read about an instance where the box had an explosion due to a faulty cable connection.  I was thinking of going one step further and drilling in vent tubes in the sealed caps to carry the hydrogen away.  I am not sure if this is a good idea or not, seems simple and effective. 
>> Hank
>> 
>> 
>> On Tuesday, March 11, 2014 6:09:52 AM, Steve McQueen <psub101 at indy.rr.com> wrote:
>> Hank, in this scenario are the batteries interior to the hull or exterior in pods?
>> Steve
>> 
>> 
>> On Mon, Mar 10, 2014 at 5:09 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>> Does anyone have an opinion on drilling in vent tubes  to each battery, and seal off the original vent holes.   Run the vent tubes to a manifold and purg.  Keep the vent tubes going up hill all the way.
>> Hank
>> 
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