🚀 go-pugleaf

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I think you might all enjoy this


Original Post (to sci.energy and sci.physics)

OK Dudes try this...
 I've figured out a desalination system that could GENERATE energy while
extracting fresh water from the ocean
Ha! knew you'd choke on that one
But don't jump to conlusions - this ain't no perpetual Motion machine
It's actually rather simple. - no fancy knowledge required...
Here is one more clue to start you off
It's particularly suited to suppling japan with its future water needs
A Gold star and achievement badge to the first to get it...

John Cook

P.S. I'll tell all when you've squirmed enough ;)


John Cook wrote:
> Gil Rood wrote:
> > John Cook wrote:
> > > Gil Rood wrote:
> > >> Oh, NO... Not another reverse osmosis system based on
> > >> the desinty differences between fresh water and
> > >> sea water.
> > >Yeah Gil!!!!!!  The WINNER.
> > >Want to explain it to them or will I?
> > >John Cook
> > Go ahead but where are you going to get water deep
> > enough outside the Marianas Trench (sp?)
> Why, just off the coast of Japan Sir.
> John Cook
> PS I want someone ELSE to explain it
> PPS Geeze I'm lazy this morning...

Must take this oportunity to cheer *B.Alan Guthrie* for placing a creditable
second CLOSE behind our champion *Gil Rood*

Here is the plan...

Imagine a long tube reaching from the surface to the bottom of the japan
trench.  It's bottom end is a reverse osmosis filter unit.  It is filled with
fresh water. 
The water outside the tube is salty and weighs around 1028 kg/cu mt - the
water inside the tube is fresh and weighs 1000 kg/cu mt.  This causes a
pressure diferential across the osmotic membrane of about 2 to 3% of the
external water pressure. 

Thats it.  Sufficient depth of water WILL cause a flow through the membrane
and up the tube.

Such a device will sit there for'ever' emiting a fountain of fresh water.

Kewl?

I think the energy comes from slightly lowering the potential energy of the
salt in the ocean. Am I right about this?


John Cook

PS of course you could put the membrane only 500 or 1000 ft down and Pump the
water up.
Not quite so fancy (I love physics that looks like magic) But it would use
only around 30% of the energy of conventional reverse osmosis plants (no need
to compress the flow-by water) not to mention no containment pressure vessel
and hence the membranes don't have to be so compact to be cramed into pressure
vessels so they would be cheaper etc etc etc.


-- 
John, Tui, Jesse & Rhea Cook
A is A - Aristotle
Reality is Hard & Beautiful - Me