STENSEA Stored Energy in Sea The Feasibility of an Underwater Pumped Hydro Storage System Presentation IRES, 12 November 2012 Dr. Andreas Garg Christoph Lay Robert Füllmann 1
Market Status Quo and Forecasts Increase of renewable energy worldwide In 2011 renewable energy supplied 16.7% of final energy consumption and about 20.3% of electricity consumption globally In 2010 renewables accounted for 12.4% of the final energy consumption in the EU27 countries Renewable energy will exceed the EU s 20% target Increase of European offshore wind energy 4.3GW installed in June 2012 40GW installed capacity by 2020, equivalent to 4% of EU electricity demand 150GW by 2030, meeting 14% of EU electricity demand 100% GW 160 140 120 100 80 60 40 20 80% 60% 40% 20% EU electricity mix (share of total consumption) 0% 2005 2020 Hydro Tidal & wave CSP PV Geothermal Wind offshore Wind onshore Biomass Non-Renewable electricity Offshore wind power production in the EU Installed capacity and share of electricity demand 16% 14% 12% 10% 8% 6% 4% 2% 0 2012 2020 2030 Installed Capacity Share of electricity demand 0% 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 Need of energy storage Costs of short term storage, daily [ ct/kwh] with small costs high efficiency (approx. 80%) close to future wind parks with high degree of capacity utilization with minor environmental impact PSH AA-CAES D-CAES H2 Methan 0 2.5 5 7.5 10 12.5 15 17.5 Source: DB Research 2012 3
STENSEA Concept Overview 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 5
The STENSEA Joint Venture - Project Leader - in cooperation with Voith Hydro Prof. Dr. Horst Schmidt-Böcking Dr. rer. nat. Gerhard Luther - Pump-turbine Technology - - Idea and Patent Application - - Project Development - 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 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 STENSEA Target costs per kw installed power 1,238 /kw 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) 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 Is definitely an issue Could be an issue Should be no issue 9
STENSEA Concept Utilization HOCHTIEF Potential Energy Utility Engineering services Construction of the sphere Installation offshore Use of HOCHTIEF vessels Maintenance License fees for HOCHTIEF patent Network services Island and off-grid power supply Balancing Energy Stabilizing of conventional power supply Self-contained starting capability (aka. black start ) 10
Q4 Oct 2013 Q2 Apr Mar Q1 Feb Jan Dec 2012 Q4 Nov STENSEA Project - Next Steps Completion of the business plan (market and technical analysis) Talks with potential investors, cooperation partners and potential clients Decision for funding by BMU Start of project phase 1 (Technical feasibility) Start of project phase 2 (Mock-up 1:10 sphere) 11
Spongebob, we will visit you! Andreas.Garg@hochtief.de Christoph.Lay@hochtief.de Robert.Fuellmann@hochtief.de 12