Re: [PSUBS-MAILIST] New underwater breathing device

[Ray Keefer <psubs2001@yahoo.com>]

Hi,

I am curious, how much power would this system need?
The centifuge would have to be spun. Pumps? How does
it make sure the extracted gases have enough oxygen in
a healthy proportion. Is there a gas seperator and
mixer? Is there actual working hardware?

Regards,
Ray

--- drewacard@charter.net wrote:

> Alan Izhar-Bodner, an Israeli inventor, has
> developed a way for divers to breathe underwater
> without cumbersome oxygen tanks. His apparatus makes
> use of the air that is dissolved in water, just like
> fish do. 
> 
> 
> (From Breathe like a fish!) 
> The system uses the "Henry Law" which states that
> the amount of gas that can be dissolved in a liquid
> is proportional to the pressure on the liquid. Raise
> the pressure - more gas can be dissolved in the
> liquid. Decrease the pressure - gas dissolved in the
> liquid releases the gas. This is exactly what
> happens when you open a can of soda; carbon dioxide
> gas is dissolved in the liquid and is under pressure
> in the can. Open the can, releasing the pressure,
> and the gas fizzes out. 
> 
> Bodner's system apparently uses a centrifuge to
> lower pressure in part of a small amount of seawater
> taken into the system; dissolved gas is extracted.
> The patent abstract reads: 
> 
> 
> A self-contained open-circuit breathing apparatus
> for use within a body of water naturally containing
> dissolved air. The apparatus is adapted to provide
> breathable air. The apparatus comprises an inlet
> means for extracting a quantity of water from the
> body of water. It further comprises a separator for
> separating the dissolved air from the quantity of
> water, thereby obtaining the breathable air. The
> apparatus further comprises a first outlet means for
> expelling the separated water back into the body of
> water, and a second outlet means for removing the
> breathable air and supplying it for breathing. The
> air is supplied so as to enable it to be expelled
> back into the body of water after it has been
> breathed
> 
>
http://www.livescience.com/scienceoffiction/050606_breathe_underwater.html
> 
> looks amazing.
> Andy
> 
> 
> 
> 
>
************************************************************************
>
************************************************************************
>
************************************************************************
> 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
>
************************************************************************
>
************************************************************************
>
************************************************************************
> 
> 



		
__________________________________ 
Discover Yahoo! 
Get on-the-go sports scores, stock quotes, news and more. Check it out! 
http://discover.yahoo.com/mobile.html



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