[PSUBS-MAILIST] bellows add

[Sean T. Stevenson via Personal_Submersibles]

Space requirements aside, I think your coffee roaster is going to be a huge battery draw... ;-)

Sean


On October 6, 2014 4:19:48 PM MDT, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>I agree Hank,I think you should email Phil & warn him:)I have thought
>that if there was an air leak in to the cabin the bellows add
>systemwould stop adding O2. They have a manual system integrated into
>the bellows addunit & a continual feed of O2 regardless of the belows.
>They would have O2 monitorswith set point alarms if the O2 % was too
>high or low but how they would address analarm issue I don't know.I
>like Cliff's method of having a set volume flowing in (as per DW) & O2
>addition generatedby O2 measurements opening an O2 solenoid valve via a
>PLC. This is similar to arebreather & James Cameron's system on the
>Deepsea Challenger.Don't get me going on the coffee issue. I buy green
>beans & roast them. Would growthem if we had the climate. My side of
>Auckland had power. Hugh lives on the Dark side.Alan
>
>From: hank pronk via Personal_Submersibles
><personal_submersibles at psubs.org>
> To: personal_submersibles at psubs.org 
> Sent: Tuesday, October 7, 2014 10:07 AM
> Subject: [PSUBS-MAILIST] bellows add
>   
>I have been pondering the idea of a bellows add system for Gamma.  I am
>not sure how the DW deals with pressure change due to temperature
>change.  When I am diving Gamma the temperature swing is huge causing a
>big negative pressure inside.  A bellows add system would be dumping O2
>in like mad.  Does the DW have an automatic O2 over ride or an
>automatic air release to compensate. Does the pilot manually add air to
>avoid O2 build up.
>When I surface after a dive without the scrubber or O2 feeding in, I
>have to open my hatch vent valve for what seems like forever to
>equalize the sub to open the hatch.  It is getting better with the air
>temps dropping.  I can't wait to go for a dive when it is snowing. 
>Hank
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