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nebbian said..Paradox said..
There is no theory available to develop practical and cost effective methods of storing and then accessing energy on a scale large enough and repeatable enough to remove the need for.....yep...Coal, Gas, Hydro and Nuclear. We don't have it, and that is why the vast majority of the worlds power still comes from those sources and will for a long time to come.
*Ahem!*
energyvault.com/ Sure, great initiative, and I hope they work. Stuff like that in conjunction with renewables will help allievate some of the issues.
Note I mentioned they have to meet
cost and scale - ie any solution has to completely replace power stations and provide constant equivilant supply at a realistic cost....
People don't get the scale we are talking about. Lets do some very rough sums around replacing a 1GW power plant (medium size) that runs 24/7 with a solar and energy vault solution.
You would need 200 of those vaults operating at once to replace one power station in real time discharge. And thats at discharge so you need renewable supply to recharge that as well as operate during the day feeding power while they are recharging.
So lets say these vaults operate from 4pm to 8am when the sun isnt doing much, thats 16 hours, with the sun working for 8 hours via panels to recharge. That immediately forces us to double the vaults as they only discharge for around 8 hours. So now we have 400 vaults needed.
Typically a 1 GW solar farm would occupy 30 square kilometers and cost about $1billion...but now we need 3x as many solar panels as 2/3rds will be charging the vaults while the sun is shining....so thats 90 square kilometers of solar farm at around $3 billion to build.
So we need 400 of those vaults and 90 square kilometers of solar panels to replace one power station for
one day. I have no idea what one of those costs, but it's going to be in the millions each surely so lets say another billion for the 400 vaults.
So to replace a power station with solar and storage like that for one day, we are talking massive footprint, huge amounts of infrastructure and in excess of $4billion.
$4billion and we have not even looked at storage beyond
one day, Maintenance, reliability or any of that. If we want to store energy for a week you would need 4200 Energy vaults.....do those sums on cost...
Great idea to assist small scale renewable projects provide power 24/7, but its not a solution to replace power plants. We still need them.
$4billion will give us a Nuclear plant that goes for 30 years and take up one square kilometer....