STENSEA
Stored Energy
in Sea
The Feasibility of an Underwater
Pumped Hydro Storage System
Dr. Andreas Garg
Christoph Lay
Robert Füllmann
Presentation IRES, 12 November 2012
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
1
Market Status Quo and Forecasts
Increase of renewable energy worldwide
EU electricity mix (share of total consumption)
Hydro
•
In 2011 renewable energy supplied 16.7% of final energy consumption
and about 20.3% of electricity consumption globally
100%
Tidal & wave
CSP
80%
PV
60%
•
In 2010 renewables accounted for 12.4% of the final energy
consumption in the EU27 countries
Geothermal
40%
Wind offshore
Wind onshore
20%
•
Renewable energy will exceed the EU’s 20% target
Biomass
0%
2005
Non-Renewable
electricity
Offshore wind power production in the EU –
Installed capacity and share of electricity demand
Increase of European offshore wind energy
GW
•
4.3GW installed in June 2012
•
40GW installed capacity by 2020, equivalent to 4% of EU electricity
demand
•
2020
150GW by 2030, meeting 14% of EU electricity demand
160
16%
140
14%
120
12%
100
10%
80
8%
60
6%
40
4%
20
2%
0
0%
2012
Installed Capacity
One roof – all solutions.
Dr. Andreas Garg
|
2020
7th IRES Conference 12-14 November 2012
2030
Share of electricity demand
2
Market Outlook
Storage capacity will be required to compensate for the fluctuating supply of wind
and solar power generation systems, especially on the power transmission level
•
Required storage capacity worldwide is expected to triple and current capacity to increase
four times by 2030
•
Worldwide investments in new pumped-storage power plants, air compressors or large
batteries to around € 208 billion by 2030
•
A number of wind parks with floating devices in deep water have been planned in countries
such as Norway, Spain, France, Portugal and Italy
Costs of short term storage,
daily [€ct/kWh]
Need of energy storage
PSH

with small costs

high efficiency (approx. 80%)

close to future wind parks

with high degree of capacity utilization

with minor environmental impact
AA-CAES
D-CAES
H2
Methan
0
2.5
5
7.5
10
12.5
15
17.5
Source: DB Research 2012
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
3
STENSEA Concept Overview
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
4
Case Study: Norwegian Trench with approx. 1000 km² of Suitable Water Depth
Offshore Grid
Possible
Connection
to the Grid
Existing power lines and ENTSO-E 10 year network development plan, converter stations und wind parks
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
5
The STENSEA Joint Venture
- Project Leader -
in cooperation with Voith Hydro
- Pump-turbine Technology -
One roof – all solutions.
Prof. Dr. Horst
Schmidt-Böcking
Dr. rer. nat.
Gerhard Luther
- Idea and Patent Application -
Dr. Andreas Garg
|
- Project Development -
7th IRES Conference 12-14 November 2012
6
STENSEA Project Milestones
Project phase 1: Technical feasibility
•
•
•
•
Construction of the sphere
Construction of the electro-mechanical equipment
Installation and maintenance concept
Cost Efficiency
Project phase 2: Mock-up
•
•
•
•
•
Hollow sphere with an inner diameter of 2.86m
Wall thickness approx. 30cm
Storage volume 12m³ at a water depth of 20m
Connection to the power grid
Risk analysis, EIA
Project phase 3: Pilot project
•
•
•
•
•
Hollow sphere with an inner diameter of approx. 30m
Wall thickness approx. 300cm
Storage volume 12000m³
Multi-stage pump-turbine with a capacity of approx. 5-6MW
Storage capacity of 20MWh at a water depth of up to 700m
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
7
STENSEA Target Costs
Construction Target Costs
Concreting costs including formwork and reinforcement
225 €/m³
2,065 T€/piece
413 €/kW
Installation of each unit
1,500 T€/piece
300 €/kW
Pump-turbine with electro-mechanical equipment
2,625 T€/piece
525 €/kW
1,238 €/kW
STENSEA Target costs per kW installed power
Note: Associated cabling costs are not considered at this point.
Comparison with conventional pumped-storage power plants:
 Current total costs of approx. 1,300 €/kW installed power
(location dependent)
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
8
STENSEA Acceptability
Specific conflicts in gaining approval for pumped-storage power plants
Conventional
STENSEA
Safety and security aspects
Alteration of existing landscape
Flora-fauna-habitat compatibility
Species protection
Aquatic organism protection
Water quality deterioration
Water level and temperature constraints
Could be an issue
Is definitely an issue
One roof – all solutions.
Dr. Andreas Garg
|
Should be no issue
7th IRES Conference 12-14 November 2012
9
STENSEA Concept Utilization
Potential Energy Utility
HOCHTIEF
•
Engineering services
•
Network services
•
Construction of the sphere
•
Island and off-grid power supply
•
Installation offshore
•
Balancing Energy
•
Use of HOCHTIEF vessels
•
Stabilizing of conventional power supply
•
Maintenance
•
License fees for HOCHTIEF patent
One roof – all solutions.
•
Dr. Andreas Garg
|
Self-contained starting capability
(aka. black start )
7th IRES Conference 12-14 November 2012
10
Nov
Mar
Talks with potential investors,
cooperation partners
and potential clients
Decision for funding by BMU
Apr
Feb
Completion of the business plan (market and technical analysis)
Start of project phase 1 (Technical feasibility)
Oct
Q2
Q4
2013
Q1
Jan
Dec
Q4
2012
STENSEA Project - Next Steps
Start of project phase 2 (Mock-up 1:10 sphere)
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
11
Spongebob, we will visit you !
Andreas.Garg@hochtief.de
Christoph.Lay@hochtief.de
Robert.Fuellmann@hochtief.de
One roof – all solutions.
Dr. Andreas Garg
|
7th IRES Conference 12-14 November 2012
12