Technology Innovation for the Bristol Channel - Regensw
Technology Innovation for the Bristol Channel 5th Bristol Tidal Energy Forum Bristol City Hall 1 October 2013
Ian Godfrey
2/12
A Multi-technology Approach… …rather than a single technology solution. A holistic, incremental approach that addresses the complex mix of economy, environment and energy aspects of the Bristol Channel System. Leadership and governance required to develop and manage the opportunity.
Technology innovation required to deliver projects.
Tidal Range
Tidal Stream
Wave
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Wind
3/10
Image courtesy of Sustainable 1 October 2013 Severn
5th Bristol Tidal Energy Forum
4/12
A Multi-technology Approach… …rather than a single technology solution. A holistic, incremental approach that addresses the complex mix of economy, environment and energy aspects of the Bristol Channel System. Leadership and governance required to develop and manage the opportunity.
Technology innovation required to deliver projects.
Tidal Range
Tidal Stream
Wave
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Wind
5/12
Energy from the Bristol Channel Challenges Technology
Potential Solutions
Finance
Tidal Lagoons
Economy
Tidal Fences
Environment
Tidal Stream
Leadership
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Tidal Lagoons Lagoon wall structures – maximise enclosed area and minimise wall length. Reduce wall structure costs through innovation in construction - geotech bags (Swansea Bay Lagoon), modular, concrete caissons (Parsons Brinckerhoff). Mode of operation – multiple bays and phasing to increase system capacity factor. Pumped storage for operation in conjunction with other schemes. Turbines – bi-directional, lower head, fish friendly turbines. Images courtesy of Tidal Lagoon Swansea Bay, Atkins and Parsons Brinckerhoff (top to bottom) 1 October 2013
5th Bristol Tidal Energy Forum
6/12
7/12
Tidal Lagoons Turbines Continued…
Images courtesy of Parsons Brinckerhoff and Pentair Nijhuis (left to right) 1 October 2013
5th Bristol Tidal Energy Forum
Pentair Nijhuis
Tidal Fences Turbines – the tidal fence approach is well suited to cross-flow type turbines with a rectangular swept area: Ocean Renewable Power Company SeaPower Gen Kepler Energy Rotor design and configuration challenge - controlling rotor speed and ‘runaway’ with fixed pitch blades, wake interaction across rotor. Foundations and installation. Images courtesy of Ocean Renewable Power Company, Kepler Energy Ltd and SeaPower Gen (top to bottom) 1 October 2013
5th Bristol Tidal Energy Forum
8/12
Tidal Fences Dynamic head modelling – creating and balancing a dynamic head difference across the turbines is a complex and sensitive task relationship to channel width and blockage, flow speed around the ends and through gaps in the fence, navigation, fish and cetacean migration, sediment transport. Benefit from exceeding the Betz limit. Images courtesy of IT Power Ltd and Giles, J., Myers, L., Bahaj, A, Colclough, B. & Paish, M. (2011) The commercialisation of foundation-based flow acceleration structures for marine current energy converters, EWTEC, Southampton 1 October 2013
5th Bristol Tidal Energy Forum
9/12
Tidal Stream
10/12
Relatively shallow 20 - 35 m with velocities in the order of 2.0 – 2.5 m/s
Map layers courtesy of Junqiang Xia, Roger A. Falconer, Binliang Lin,UKApplied Energy, Volume 87, Issue 7, July 2010, Pages 2374–2391 and ABPmer Marine Energy Atlas 1 October 2013
5th Bristol Tidal Energy Forum
Tidal Stream Turbines - Adjusting the economics to make smaller machines economically viable. Simpler and more robust – fixed pitch blades, passive adaptive blade design, direct drive (no gearbox), seawater lubrication. Turbine developers exploring and demonstrating this approach include: Schottel Tocardo Verdant Power Images courtesy of Verdant Power, Tocardo and Schottel 1 October 2013
5th Bristol Tidal Energy Forum
11/12
Tidal Stream Foundation design - novel foundation structures – multi-turbine structures, surface accessible, gravity foundations, bridge structure mounted. BlueTEC, Tidal Energy Ltd, Tidal Stream, Tocardo, MCT and more exploring foundation options. Turbine layout – exploiting resources like the Bristol Channel will require careful array layout optimisation through numerical modelling and tank testing. Get it right and there is a significant global market. Images courtesy of Tidal Energy Ltd, Tidal Stream and Blue Water 1 October 2013
5th Bristol Tidal Energy Forum
12/12
Conclusions Technology Innovation
Cross cutting themes
Tidal Lagoons Wall construction Mode of operation Low head turbines
A platform for innovation A better understanding of the complex regional balance of environment, economy, energy
Tidal Fences Turbine design Modelling blockage
Supply chain value
Tidal Stream Cost reduction and simplicity Foundation design Turbine layout optimisation 1 October 2013
Leadership and governance
5th Bristol Tidal Energy Forum
Thank you for listening [email protected] Ian Godfrey
1 October 2013
5th Bristol Tidal Energy Forum
Ian Godfrey
2/12
A Multi-technology Approach… …rather than a single technology solution. A holistic, incremental approach that addresses the complex mix of economy, environment and energy aspects of the Bristol Channel System. Leadership and governance required to develop and manage the opportunity.
Technology innovation required to deliver projects.
Tidal Range
Tidal Stream
Wave
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Wind
3/10
Image courtesy of Sustainable 1 October 2013 Severn
5th Bristol Tidal Energy Forum
4/12
A Multi-technology Approach… …rather than a single technology solution. A holistic, incremental approach that addresses the complex mix of economy, environment and energy aspects of the Bristol Channel System. Leadership and governance required to develop and manage the opportunity.
Technology innovation required to deliver projects.
Tidal Range
Tidal Stream
Wave
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Wind
5/12
Energy from the Bristol Channel Challenges Technology
Potential Solutions
Finance
Tidal Lagoons
Economy
Tidal Fences
Environment
Tidal Stream
Leadership
Images courtesy of Marine Energy Matters 1 October 2013
5th Bristol Tidal Energy Forum
Tidal Lagoons Lagoon wall structures – maximise enclosed area and minimise wall length. Reduce wall structure costs through innovation in construction - geotech bags (Swansea Bay Lagoon), modular, concrete caissons (Parsons Brinckerhoff). Mode of operation – multiple bays and phasing to increase system capacity factor. Pumped storage for operation in conjunction with other schemes. Turbines – bi-directional, lower head, fish friendly turbines. Images courtesy of Tidal Lagoon Swansea Bay, Atkins and Parsons Brinckerhoff (top to bottom) 1 October 2013
5th Bristol Tidal Energy Forum
6/12
7/12
Tidal Lagoons Turbines Continued…
Images courtesy of Parsons Brinckerhoff and Pentair Nijhuis (left to right) 1 October 2013
5th Bristol Tidal Energy Forum
Pentair Nijhuis
Tidal Fences Turbines – the tidal fence approach is well suited to cross-flow type turbines with a rectangular swept area: Ocean Renewable Power Company SeaPower Gen Kepler Energy Rotor design and configuration challenge - controlling rotor speed and ‘runaway’ with fixed pitch blades, wake interaction across rotor. Foundations and installation. Images courtesy of Ocean Renewable Power Company, Kepler Energy Ltd and SeaPower Gen (top to bottom) 1 October 2013
5th Bristol Tidal Energy Forum
8/12
Tidal Fences Dynamic head modelling – creating and balancing a dynamic head difference across the turbines is a complex and sensitive task relationship to channel width and blockage, flow speed around the ends and through gaps in the fence, navigation, fish and cetacean migration, sediment transport. Benefit from exceeding the Betz limit. Images courtesy of IT Power Ltd and Giles, J., Myers, L., Bahaj, A, Colclough, B. & Paish, M. (2011) The commercialisation of foundation-based flow acceleration structures for marine current energy converters, EWTEC, Southampton 1 October 2013
5th Bristol Tidal Energy Forum
9/12
Tidal Stream
10/12
Relatively shallow 20 - 35 m with velocities in the order of 2.0 – 2.5 m/s
Map layers courtesy of Junqiang Xia, Roger A. Falconer, Binliang Lin,UKApplied Energy, Volume 87, Issue 7, July 2010, Pages 2374–2391 and ABPmer Marine Energy Atlas 1 October 2013
5th Bristol Tidal Energy Forum
Tidal Stream Turbines - Adjusting the economics to make smaller machines economically viable. Simpler and more robust – fixed pitch blades, passive adaptive blade design, direct drive (no gearbox), seawater lubrication. Turbine developers exploring and demonstrating this approach include: Schottel Tocardo Verdant Power Images courtesy of Verdant Power, Tocardo and Schottel 1 October 2013
5th Bristol Tidal Energy Forum
11/12
Tidal Stream Foundation design - novel foundation structures – multi-turbine structures, surface accessible, gravity foundations, bridge structure mounted. BlueTEC, Tidal Energy Ltd, Tidal Stream, Tocardo, MCT and more exploring foundation options. Turbine layout – exploiting resources like the Bristol Channel will require careful array layout optimisation through numerical modelling and tank testing. Get it right and there is a significant global market. Images courtesy of Tidal Energy Ltd, Tidal Stream and Blue Water 1 October 2013
5th Bristol Tidal Energy Forum
12/12
Conclusions Technology Innovation
Cross cutting themes
Tidal Lagoons Wall construction Mode of operation Low head turbines
A platform for innovation A better understanding of the complex regional balance of environment, economy, energy
Tidal Fences Turbine design Modelling blockage
Supply chain value
Tidal Stream Cost reduction and simplicity Foundation design Turbine layout optimisation 1 October 2013
Leadership and governance
5th Bristol Tidal Energy Forum
Thank you for listening [email protected] Ian Godfrey
1 October 2013
5th Bristol Tidal Energy Forum
