[PSUBS-MAILIST] K350 motors and housings - available

Tue Apr 2 11:53:59 EDT 2019

 Heat Index Equation

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Heat Index Equation

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https://www.weather.gov/safety/heat-index

Sean see links above. This is sometimes called the "feels like temperature".  It accounts for two variables, the relative humidity and the ambient temperature.  As RH goes to zero, Heat Index or Feels link temp goes to ambient temperature.
Yes, you do need to get out of Canada more often.  People in south Texas pay a lot of attention to heat index for safety reasons.
As to dumping condensate into VB tank, on my boat I have removed my VBT and now use removable ballast at CG of boat much like a diver weights up for a dive.  To overboard condensate, I would need a small PD pump, SS internals that could overcome maximum ambient pressure. It would need to be something like the pump Alan has for his VB system.
Best Regards
Cliff

    On Tuesday, April 2, 2019, 10:05:46 AM CDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 1) The concept of being too warm on a dive blows my mind. I obviously need to travel more.
2) Can you explain "heat index"?
3) Rather than build an AC unit with an integral reservoir for the condensed water, one might consider simply pumping any condensate to your VBT, if so equipped.

Sean

Sent from ProtonMail mobile

-------- Original Message --------
On Apr 2, 2019, 08:06, Cliff Redus via Personal_Submersibles < personal_submersibles at psubs.org> wrote:

 To me AC on personal subs is an interesting topic.  As the Psub community frequently dives off Islamorada Florida, it is a relative thread.Below is a graph taken from flight recorder on the R300 during a Psub dive off the coast of Islamorada in August of 2017.

 It got very hot and humid during the 4.5 hour dive.  Note that the cabin temperature reached 96 F, the relative humidly reached 85% and the heat index reached 146 F.  To say that I could have used small AC unit in the boat is an understatement!  One of the implications of this cabin environment was that I could not keep the viewport clear.  I soaked the towels I had on board very quickly trying to clear the viewport.  As a consequence, is was hard to see.  
There are challenges in designing a AC system for small subs.  Ideally, it would be self contained and easily removed for service.  The unit is going to have a reservoir for capturing quite a bit of condensed water extracted over say a 6 hour design mission time.  For my boat the unit would need to be small and compact.  Would be nice if we could find a OTS small compact AC unit that was DC powered. 
If any one knows of a small compact AC unit, send me the link.  I would like to test in my boat.
Cliff

    On Monday, April 1, 2019, 3:26:25 PM CDT, Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 And it occurred to me, while we discussed air conditioning systems on our personal subs, we were likely the only three people on the planet having that conversation. 'Tis a small collection of fellow adventurers.

Brian 
Owner of Harold, the wonder K350 and
Maude, the Porta Bote extraordinaire

Yes, Harold and Maude ....   

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