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Author Topic: Gravity Energy Storage - The New Stone Age  (Read 284 times)

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Re: Gravity Energy Storage - The New Stone Age
« on: May 23, 2018, 11:09:17 pm »
Check these german guys out http://www.sun-orbit.de/  They have pretty much realized all my best ideas on synergistic greenhouse energy systems.  They are all combined power solar thermal systems based on low speed high volume stirling engine systems.

To RE: About that gravity system you are pondering - check this out

If this is applied on a somewhat smaller scale, it will work better than a tower mechanism, simply because it is less exposed to the elements:

January 18, 2018

Spiegel / Heindl Energy
German company plans large-scale power storage using massive rock block

Southern German company Heindl Energy proposes to overcome one of the energy transition’s central challenges – how to store renewable electricity on a large scale – with a pumped hydro system that does not require mountains, reports Ralph Diermann for Spiegel Online.

The company wants to use a massive rock piston with a diameter of at least 100 metres, which is lifted hydraulically using electrical pumps powered by renewable energy. Storage experts told the author that the idea is valid in principle, but many technical hurdles will have to be overcome. Heindl Energy, which has received support from a venture capital investor, is currently in negotiations to build a pilot project with a diameter of 20 metres in Saudi Arabia.

About Gravity Storage

Gravity Storage is a concept with which unprecedentedly large quantities of power can be stored for a long time of 6-14 hours, and can be made available again.

The fundamental principle is based on the hydraulic lifting of a large rock mass. Using electrical pumps, as already used today in pumped storage power plants, water is pumped beneath a movable rock piston, thereby lifting the rock mass.

During times of insufficient generation of renewable power, the water which is under high pressure from the rock mass, is routed to a turbine, as in conventional hydroelectric plants, and generates electricity using a generator.

The capacity of energy storage reaches 8 GWh or more  , comparable to large Pumped Hydro Storage.

The rock piston should have a diameter of at least 100 meters in order to be competitive with pumped storage power plants. The real costs will vary for each site. But we calculate with costs of about 200 USD/kWh capacity at a size of 250-meter diameter.



This is the principle.  Good find AG.  The difference in efficiency between going down into the ground versus going up is not going to be very significant.  For a big system, it's necessary because building any tower you could haul up that much mass with would be prohibitively expensive, not to mention not very safe.

I think more on the small scale for the individual or small community.  Big storage plants like this would be run by the Big Energy companies as the shift is made from FFs as a profit center for the elite.

In most cases, it would be impractical and too expensive to dig the big hole deep enough to fit your mass.  You could much more easily weld together a TeePee frame from steel pipe with a hexagonal patern of supports that could handle pulling up a Ton into the air 20" high.  Or you could split the difference and dig your hole 10' deep and have the tower lift the mass 10' more than that.  You also are not restricted to just one of these storage units, you could build several of them, one for each of your banks of PV Panels or Wind Turbines.  There are 100's of millions of Car & Truck alternators available you could reconfigure to work with your system.  All DIY stuff, no fancy chemical processing necessary.  The whole system can be tested out first on a very small scal in the backyard  with much less weight, probably 500 lbs would be a good size to start with.  Scale it up once you empirically determine how well it works.

The lifting weight can be just about anything reasonably Dense, Sandbags or 55 Gal barrels of water for instance.  Your mechanical transmission as I mentioned could come from any off-road bike designed for trail riding that has a really low gear.  Buy that on the used market cheap also.  You can even buy a wrecked one (many of those after any race) for pennies.  All the rest of the hardware available at your local Home Depot.

It would be interesting to see how big a system you would need for a renewable array the size of the one DB runs.  Time for a new project DB! 

Rob not the poor, because he is poor: neither oppress the afflicted in the gate:
For the Lord will plead their cause, and spoil the soul of those that spoiled them. Pr. 22:22-23


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