Hydraulic Rock Storage an efficient system for large grid scale storage

Transcription

1 Hydraulic Rock Storage an efficient system for large grid scale storage Prof. Dr. Eduard Heindl, Heindl Energy GmbH, Stuttgart, Germany energy.com

2 About us Heindl Energy GmbH, Stuttgart, Germany Founder and main Shareholder: Professor. Dr. Eduard Heindl Main investor: Executive directors: HTG Ventures AG Prof. Eduard Heindl (CTO) Robert Werner (CFO) Founded in: 2013 Headquarter: Stuttgart, Germany Object of Heindl Energy is the development and conceptualizing of the Hydraulic Rock Storage. The company holds all patents on this system. Further information:

3 Technical Concept Hydraulic Rock Storage pushes storage of electricity in a new dimension of efficiency Func%onality: A piston of rock that has been exposed from its natural surroundings, is raised up using water pressure, and when power is needed, the water is released and routed to turbines. The concept of hydraulic hydro storage (HHS) offers an innovadve soludon because it can store large amounts of energy for a long Dme.

4 The physical basic principle Using gravity power The economical benefit: The storage capacity increases with the fourth power of the radius. The construcdon costs however only increase with the square of the radius. This means that the construcdon costs increase substandally more slowly than the storage capacity. mass~ r³ height~ r r storage capacity E = 2 π g ρ * r 4 E HRS = (2*ρ R -3/2*ρ W )* π*g*r 4 l = 2r Costs of construction: b ~ r² Costs per kwh ~ 1/r² h = r

5 The Competitive Advantage Doubling the radius.reduces the costs per kilowatt-hour to a quarter,.but increases the storage capacity by 16 times!

6 Construction Sequences of Construction The rock piston needs to be dismantled from its and he side walls will be cleared with rock cutting machines. All exposed surfaces will be sealed with geomembranes against environmental impacts and water. The piston wears a gasket, which is flexible. The storage can be constructed with approved technologies from mining and tunnel constructions. 1. Excavating access to bottom 2. Separating bottom of piston 3. Separating side walls by blasting (parallel to 1,2) 4. Sealing the surfaces 5. Installing sealing system 6. Installing pumps, turbines and generators etc.

7 Sealing Concept rolling membrane sealing Typical pressure at sealing: 40 Bar Forces are absorbed by steel cables Flexible towards fluctuating position of cylinder Self-centering No special surface needed Producing similar conveyors

8 Size variants at a glance HRS is to be built in different sizes once. From about 125 m diameter it corresponds to the storage capacity of today's major pumped storage. capacity [GWh] 0,20 1,0 2,1 3,2 8,0 124 radius, height [m] diameter [m] volume of water [1000 m³] pressure [Bar]

9 Location requirements Geology: Possibly compact, homogeneous rock with little tendency to fracture. The more compact, the cheaper the expansion. No mountains required! Hydrology: Proximity to a water supply and drainage, but no large-scale upper and lower basins necessary. Instead, only a single basin or an underground water reservoir is sufficient.

10 Possible Locations Large PV-Power Plants

11 Business model of the potential energy store in sunny countries thank you! Heindl Energy GmbH Wankelstrasse Stuttgart Germany phone:

12 Business Models Fundamental business models of large grid scale storage: 1. Trading: storing at low prices, sell at higher prices. 2. Market for system services: as a source of flexibility and security of supply. 3. Energy- intensive industries: shaving of peak loads and corresponding lower grid charges All three variants can be varied over: the number of cycles the design of the installed pump and turbine power

13 Construction costs of storage (without turbines, pumps, generators, machinery etc.!) Costs in 400,000,000 Costs per storage capacity 240 /kwh 300,000, /kwh 200,000, /kwh 100,000, /kwh 0 50 m 75 m 100 m 125 m Kapazität 1 GWh Radius 8 GWh 0 /kwh Quelle:

14 Current development and planning By the end of 2014: ü Feasibility studies with respect to geology, geo- mechanics and mining implementadon ü cost esdmates ü revenue scenarios ü Further developments of the sealing concepts Running: Search for locadons at home or abroad for pilot project. PresentaDon of the concept in the global energy and science community 2015: Start of planning a pilot project EsDmated Approval duradon: 2 years EsDmated construcdon Dme (highly dependent on size), min. 2 years

15 Advantage of Hydraulic Rock Storage ü Long duration time ü Economy: enormous scale with increasing radius ü Efficiency: 80% (~ comparable to pumped hydro) ü Construction in this combination is new, but respective technologies has long been tested (for example, in mining and tunneling) ü Low land footprint ü Less water requirement than pumped hydro power (~ 1/4) ü Black start capability ü Rotating masses

16 energy.com thank you! Heindl Energy GmbH Wankelstrasse Stuttgart Germany phone: