Re: [PSUBS-MAILIST] L.S.S.-Life Support System

["Sean T. Stevenson" <cast55@telus.net>]

Carsten, how is airflow managed in your sub?  Did you model the airflow, just 
as you would when designing ventilation for a building?  Does your scrubber 
intake only from an area near the scrubber, or is there ductwork for inflow 
and outflow to ensure consistent CO2 concentration everywhere in the interior 
space?

You also mentioned the temperature dependence of cabin pressure.  I wonder 
also about the moisture content.  Scrubbers work most effectively when the 
air to be scrubbed is dry - do you use a dehumidifier?  How much heat, and 
how much moisture is expelled per person per hour?  Is this insignificant 
compared to heat loss to the outside?

-Sean


On December 14, 2004 12:40, Carsten Standfuss wrote:
> And this loss of pressure can open an automatic barometric oxygen-vale..
> ..very simple control. Self-leveling. But not undepentable of the
> temperation of the cabin air.
>
> Better is also to meassure the PO2 pressure in the cabin. And maybe the
> PCo2.
>
> I have a question for all - in the "Seehund" world war two two man
> submarines they use the oxygen-flow from the oxygen pressure bottle via
> a injector nozzel (venturi nozzel with side entrance) to flow the cabin
> air (in mixture with the oxygen) to pass the scrubber. No fan. My
> impression is that this can not work because the oxygen flow is to low -
> but obviously some of the boats stay two days underwater.. Any idears
> how to calculate or explain how it works ?
>
> regards Carsten



************************************************************************
************************************************************************
************************************************************************
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
************************************************************************
************************************************************************
************************************************************************