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Old 11-07-2018, 11:22 PM   #1 (permalink)
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Renewable energy storage scheme.

Here is a storage scheme that parallels the idea of using excess renewable energy to lift large bricks and use the resultant potential energy later.

https://www.fastcompany.com/90261233...edium=referral

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Old 11-08-2018, 06:41 AM   #2 (permalink)
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Same concept as using rail cars.

https://s3.amazonaws.com/siteninja/m...S_-_101217.pdf


Central storage areas would work for highly populated areas.

Outside of populated areas, individual systems could be developed.

For instance, a chimney like structure could be added to a home with a
winch-motor-generator and a large weight. (Concrete or water)

Many years ago, I think it was Popular Science. Had a article that proposed putting a large concrete flywheel in the basement of a home for energy storage.


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Old 11-08-2018, 08:05 AM   #3 (permalink)
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Quote:
Originally Posted by RustyLugNut View Post
Here is a storage scheme that parallels the idea of using excess renewable energy to lift large bricks and use the resultant potential energy later.

https://www.fastcompany.com/90261233...edium=referral
Frictional losses verses evaporation of reservoirs or cost of water towers?

I learned about the below a few months ago, similar to as described in the article I suspect.

Ludington Pumped Storage Power Plant
https://en.wikipedia.org/wiki/Luding...ge_Power_Plant
Quote:
At night, during low demand for electricity, the turbines run in reverse to pump water 363 feet (111 m) uphill from Lake Michigan into the reservoir. The plant takes advantage of the natural steep sand dune landform of eastern Lake Michigan. During periods of peak demand water is released to generate power.
The below is new to me as well, it is interesting.

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Originally Posted by redneck View Post
The cost of land would have a serious affect on that system, as much as geography has on the earth berm reservoir systems.

Yea, the original concept posted offers a lot of advantages.
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Last edited by kach22i; 11-08-2018 at 08:11 AM..
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Old 11-08-2018, 11:02 AM   #4 (permalink)
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The trouble is in sheer mass that is needed to be transported. Lets say you want to make a cup of tea. To heat cup of water you need Q=cmdT, having m=0,2 kg; dT=85'C;c=4200 kJ/kg'C gives amount of 71400 Joules. Thats equivalent of rising 1 ton concrete block into height of 7 meters!

For any practical implementation you need to literally move mountains. Real time.

Last edited by seifrob; 11-08-2018 at 02:53 PM.. Reason: grammar
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Old 11-08-2018, 12:04 PM   #5 (permalink)
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Space elevator and energy storage-

When excess power is generated, reel the space elevator in a bit with an electric motor. To get the power back out, the centrifugal force will spin the generator as the elevator unwinds.
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Old 11-08-2018, 01:49 PM   #6 (permalink)
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Very simple physics math tells us this isn't really useful, unless you have something the size of a lake.
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Old 11-08-2018, 03:57 PM   #7 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
Very simple physics math tells us this isn't really useful, unless you have something the size of a lake.
Which makes it quite impressive to compare to the energy content of modern batteries or a gallon of gasoline.
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Old 11-09-2018, 09:50 AM   #8 (permalink)
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Hasn't PGE been doing this for forever at Huntington lake just north of FRESNO?

The lake is full at dinnertime, perhaps 5 ft lower at dawn
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Old 11-09-2018, 01:29 PM   #9 (permalink)
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Quote:
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The lake is full at dinnertime, perhaps 5 ft lower at dawn
Not quite the same: they just adjust the rate at which water flows out through the generators, rather than pumping it back up. (At least as far as I could find.) This is done to some extent with most dams.
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Old 11-11-2018, 10:20 AM   #10 (permalink)
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Quote:
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Not quite the same: they just adjust the rate at which water flows out through the generators, rather than pumping it back up. (At least as far as I could find.) This is done to some extent with most dams.
... What is clever actually. Let the Sun do the actual pumping! (well, and the Rain too...)

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