h a l f b a k e r y"My only concern is that it wouldn't work, which I see as a problem."
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Inspired by TheBamForth's and pocmloc's very clever
ideas
Use part of the turbine's power to pump air into the
storage
area above the piston, push the piston down into the
deep
well and when needed, let the water pressure at depth
push
the piston, and air back up to be used.
Cheaper
than storing the water in a tank or building a
diving
bell to store the air and you can increase the volume,
storage capacity and pressure as needed by going deeper
with your piston well. And unlike a simple diving bell
style tank, you're pretty much unlimited in how big this
thing could be. It could also be easily extended as
necessary.
See link for TheBamForth's and pocmloc's ideas this
evolved
from.
ADDENDUM: Piston could be charged either by an air
pump or simply pulling the piston down with cables.
The ideas this evolved from.
Hollow_20wind_20tur...ich_20store_20water
[doctorremulac3, Jun 09 2020]
A review of underwater compressed air storage
http://euanmearns.c...ressed-air-storage/
[xaviergisz, Jun 12 2020]
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Annotation:
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kdf, are you saying a piston exposed to the
open ocean and utilizing the ocean water pressure
as
the "spring" to store the energy has been done
before? I'm not seeing it in your link. It might be
there but I didn't see it at first glance. Seeing the
balloon as being proposed but not the exposed
piston. |
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If it HAS been proposed, gotta wonder why
nobody's done it. Storage of intermittent energy
generation systems like wind and solar is a big
issue. |
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That's fine, I appreciate it. I WANT to know if this
has
been suggested before. |
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Kind of surprised that it hasn't frankly. |
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By the way, see addendum for how the piston
would be filled. You could use an air pump, but,
you could also just have a motor pulling the piston
down. Very simple. |
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Then it wouldn't be a compressed air storage until
you let the piston go. |
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Mechanically moving a piston to displace sea water at high pressure would need to seal the upper air chamber at a considerable differential pressure - very difficult to do well. OTOH, an air pressure driven piston would only need to prevent/reduce diffusion at the air/water interface as the pressures would be the same. In any charge-discharge cycle, with time, such diffusion would reduce system efficiency. |
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It might be useful to compare the efficiency of an air turbine versus a piston engine - where the engine is made up of a series of bladder type pistons, sequenced via pneumatic valves. The attempt would be to minimized losses to those resulting from adiabatics. |
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I'm not seeing why you need the piston at all.
Compressed air will quite happily sit above water, so just
pump air into the open-bottom tube and let the seawater
find the balance. |
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Hey, [manwhojaped]; welcome aboard. |
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Use the return key for social distancing and sanitise your elbows
whem you've finished. ;-) |
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[manwhojaped] Welcome and I sincerely thank you for making me look up a word. |
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//just pump air into the open-bottom tube// That is what I suggested originally, and then improved by suggesting instead pumping water our of the top of said tube. |
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Yea, [manwhojaped]; welcome aboard. |
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Interesting annotation, that's what I come here for. |
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you people are awesome! you make me think - and I am grateful of the exercise. |
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[pocmloc]; so you did. I must have missed the last comments
there somehow.
So a big hole in the ocean; re-generate power by letting the
ocean fill it back up... |
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