Re: Gravitricity Czech Republic
Posted: Thu Feb 23, 2023 9:55 am
Some info on undersea compressed air technologies here,
https://theliquidgrid.com/marine-clean- ... y-storage/
https://theliquidgrid.com/marine-clean- ... y-storage/
Renewable energy and sustainability discussions
https://camelot-forum.co.uk/phpBB3/
https://camelot-forum.co.uk/phpBB3/viewtopic.php?f=18&t=1900
Of course it is not my idea to store air under water at constant pressure, as Nowty has pointed out it can be done under sea but our continental shelf means it is not deep enough. I like the idea as it lends itself to small scale isothermal compression rather than have to store heat to use again while the air is expanded, some heat again is needed else it will be very cold after the expansion, which may be a useful thing.AE-NMidlands wrote: ↑Thu Feb 23, 2023 8:05 am
That is a really good idea, as long as they are stable enough and not so rough (with steel support beams and suchlike) which would wreck the bladders.
I know a large part of coalmine work was keeping the roadways open and safe to use.
OMG ! I just had a eureka moment the house of commons is an energy storage system, after all its full of gas bags all spouting lots of hot air !spread-tee wrote: ↑Thu Feb 23, 2023 9:46 amOr airbags under the sea?openspaceman wrote: ↑Wed Feb 22, 2023 11:04 pmWhy not pump the bottom galleries dry, fit air tight bladders in them, allow them to flood a few hundred metres deep and use them to store compressed air at constant pressure?AE-NMidlands wrote: ↑Wed Feb 22, 2023 10:09 pm
Back to the first point: there are precious few places where pumped hydro can be put. Which is why we haven't seen any for half a century or more now.
going back to this thread and the deafening silence about storage and on-shore wind in our "government's" latest "green plan" (not) It seems to me that nothing will happen on storage in the UK for several reasons:Moxi wrote: ↑Thu Feb 23, 2023 9:38 am I liked your train analogy, here in North Wales we have a lot of slate workings where the old haul roads are still evident with slopes typically 1 in 3 - they would be very easy to re rail and install winches' and weights with a generator and you would have a reproducible small scale system that could address the Grids rapid response requirements.
As far as I can see no one is doing anything with this ideal infrastructure - most likely because its not profitable but the the opportunity is there should it become financially viable at a later date
Moxi
The energy dome concept really intrigues me.openspaceman wrote: ↑Thu Feb 23, 2023 11:38 amOf course it is not my idea to store air under water at constant pressure, as Nowty has pointed out it can be done under sea but our continental shelf means it is not deep enough. I like the idea as it lends itself to small scale isothermal compression rather than have to store heat to use again while the air is expanded, some heat again is needed else it will be very cold after the expansion, which may be a useful thing.AE-NMidlands wrote: ↑Thu Feb 23, 2023 8:05 am
That is a really good idea, as long as they are stable enough and not so rough (with steel support beams and suchlike) which would wreck the bladders.
I know a large part of coalmine work was keeping the roadways open and safe to use.
The compressing CO2 to 80 bar, to store as a liquid, is similar but needs a rather large balloon to store it after it is expanded. Again there is a requirement to store heat to turn it back into a gas and then apply more heat so that when it is expanded through an engine it exhausts at ambient temperature at least.
Yes, I wonder if we will see them.smegal wrote: ↑Sat Apr 01, 2023 9:15 am
The energy dome concept really intrigues me.
Looks like they do use a thermal store.
[media]https://energydome.it/wp-content/upload ... ry_Def.mp4[/media]
I think all the ones which rely on compressed gas have to, otherwise half the energy is wasted. I think the compressed air one SW of Manchester has a sodium acetate phase-change thermal store - can that be right? I have just looked it up and there is no reference to that bit that I can find, but it must need some way of supplying heat to the expanding air if the whole thing is not to freeze up.smegal wrote: ↑Sat Apr 01, 2023 9:15 am The energy dome concept really intrigues me. Looks like they do use a thermal store.
[media]https://energydome.it/wp-content/upload ... ry_Def.mp4[/media]