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Author Topic: Gravity Energy Storage - The New Stone Age  (Read 5 times)

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AGelbert

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Gravity Energy Storage - The New Stone Age
« on: January 18, 2018, 11:22:04 pm »


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.

READ MORE:

https://www.heindl-energy.com/technical-concept/
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