Gravitricity Czech Republic
Gravitricity Czech Republic
Wonder if this actually gets built? Certainly seems like a deep mine with a 700m shaft, is 4MW (or is it 4MWh) good? I suppose better than not having it.
https://renews.biz/83986/gravitricty-pl ... zech-mine/
https://renews.biz/83986/gravitricty-pl ... zech-mine/
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
Oversees an 11kWp solar array at work
Re: Gravitricity Czech Republic
The agreement will see the two companies seek funding to transform the former decommissioned Darkov deep mine – which is located in the Moravian-Silesian region of the Czech Republic - into a 4MW / 2MWh energy store.
https://www.theengineer.co.uk/content/n ... ergy-store
https://www.theengineer.co.uk/content/n ... ergy-store
18.7kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 27MWh generated
6 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 520 m3
Ripple 6.6kW Wind + 4.5kW PV > 27MWh generated
6 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 520 m3
Re: Gravitricity Czech Republic
Ever tried to maintain a crane winch? Ridiculous concept. Should just pump water.
-
- Posts: 2079
- Joined: Wed Jun 02, 2021 6:10 pm
Re: Gravitricity Czech Republic
They will be doing that anyway... most mines need perpetual pumping just to keep them useable. Maybe the droppers will be so dense that the buoyancy and viscosity - or corrosivity - of the (flood) water won't matter?
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.
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
-
- Posts: 662
- Joined: Mon Mar 21, 2022 7:37 pm
Re: Gravitricity Czech Republic
Why 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.
Morso S11
FIT
16 Sharp PV panels facing WSW 4kW
Solarmax 4200S inverter
Non FIT
3 Canadian solar DC coupled 1.75kW facing SSE
Storage
Growatt SPA3000TL BL inverter ac coupled
Growatt GBLI6532 6.5kWh lithium phosphate battery
FIT
16 Sharp PV panels facing WSW 4kW
Solarmax 4200S inverter
Non FIT
3 Canadian solar DC coupled 1.75kW facing SSE
Storage
Growatt SPA3000TL BL inverter ac coupled
Growatt GBLI6532 6.5kWh lithium phosphate battery
-
- Posts: 2079
- Joined: Wed Jun 02, 2021 6:10 pm
Re: Gravitricity Czech Republic
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.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.
I know a large part of coalmine work was keeping the roadways open and safe to use.
2.0 kW/4.62 MWh pa in Ripples, 4.5 kWp W-facing pv, 9.5 kWh batt
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
30 solar thermal tubes, 2MWh pa in Stockport, plus Congleton and Kinlochbervie Hydros,
Most travel by bike, walking or bus/train. Veg, fruit - and Bees!
Re: Gravitricity Czech Republic
This is a specific solution that matches the topography and opportunities of the Czech Republic and they are trying to do something within that context, a bit like the UK opting primarily for wind (because we have so much of it) while trying, albeit at a small scale, for quite a few decades to harness the other great energy source we have in our coastal waters.
Given that largely untapped potential of tidal energy and the successful operational strides that have been made in that direction most recently the UK could be said to be less reliant on alternative types of stored energy options. That being said it is however an option that a few are pursuing in a number of countries and if it works as a private investment opportunity then all well and good - after all diversity is king when it comes to RE and energy storage.
I for one wish them good fortune and success.
Moxi
Given that largely untapped potential of tidal energy and the successful operational strides that have been made in that direction most recently the UK could be said to be less reliant on alternative types of stored energy options. That being said it is however an option that a few are pursuing in a number of countries and if it works as a private investment opportunity then all well and good - after all diversity is king when it comes to RE and energy storage.
I for one wish them good fortune and success.
Moxi
Re: Gravitricity Czech Republic
Exactly my point. They can't pump hydro since the geography needs to be just right and in any case takes years to build out. Once your done you can't dispatch all the energy quickly anyway.
Even if you make this magically almost free to operate it doesn't scale and costs too much. A simple exercise to imagine: test a cheaper version that mostly already exists e.g. a train on an existing trackside mountain. You still can't make the maths work even being given all those bits for free.
Would you put your own money into this? How about the classic "this will work but only if we raise 8x the funding!' pitch.
Even if you make this magically almost free to operate it doesn't scale and costs too much. A simple exercise to imagine: test a cheaper version that mostly already exists e.g. a train on an existing trackside mountain. You still can't make the maths work even being given all those bits for free.
Would you put your own money into this? How about the classic "this will work but only if we raise 8x the funding!' pitch.
Re: Gravitricity Czech Republic
Yes it feels like something that should be a Government backed scheme of last resort and when placed in that camp there are arguably better options.
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 wights 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
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 wights 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
-
- Posts: 646
- Joined: Mon May 31, 2021 7:16 pm
- Location: ville of spiky things
Re: Gravitricity Czech Republic
Or 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.
Blah blah blah