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The Severn Estuary Forum is a key annual event in its eighth year and hosted by the Severn Estuary Partnership: an independent, estuary-wide initiative, involving all those interested in the management of the estuary, from planners to port authorities, fishermen to farmers. This year’s Forum was opened by the Lord Mayor of Gloucester and supported by CIWEM. It focussed on a number of diverse topics, including the upper estuary; renewable energy possibilities; a review of the Severn Estuary Flood Risk Management Strategy; an overview of the operations and maintenance of the Severn River Crossings; Local Enterprise Partnerships; The Bristol Deep Sea Container Terminal; proposals for a Severnside Airport and Fisheries amongst others. These engaging and exciting events are intended for all interested in learning about the latest research and policy developments dealing with the Severn Estuary and its future, and always guarantee a lively and informative day of presentations and talks. They offer a unique opportunity to learn from others, share ideas and participate in the management of the Severn Estuary.
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Bristol Channel Energy
A Balanced Technology Approach
Severn Estuary Partnership 17 October
Johnny Gowdy
South West Marine Energy Park
A physical and geographic zone with priority focus for marine energy technology development, energy generation projects and industry growth
3
Beyond 2020UK needs large scale renewable energy projects
Image courtesy of Parsons Brinckerhoff
Severn Tidal Power Study 2010
Cardiff to Weston Barrage
Bridgwater Bay Lagoon
Shoots Barrage
8,640MW 3,600MW 1,050MW
14.4 to 16.7TWh/a
5.6 to 6.9 TWh/a
2.6 to 2.8 TWh/a
Ebb only Ebb & Flood Ebb only
£211 £248 £228
Levelised Cost Of Energy Cost (£/MWh @10%)
Recent Barrage Proposals
Challenges
• New Turbine Technology
• Timelines
• Planning and legal risk
• Capital cost and finance
• Environmental Impact – habitat loss &
fish migration
• Impact on upstream ports and economy
• “transformational level of information ”
• Credibility and loss of goodwill
ECC Select Committee Report - June 2013Government response – September 2013
Balanced Technology Approach
Energy, Economy & Environment
A holistic energy system
Mixed technologies
Impacts and interdependencies
Incremental approach
New and proven technology
Invest - stimulating Welsh and South West economies
Export - global energy market
Energy, Economy and jobs
Environment and society
Series of Lagoons
Tidal StreamRelatively 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
New Concepts – Tidal Fences
New tidal technologies
Plus Wind and Wave Power
Energy Potential
5-14 GW
Technology
2-5 GW
2-4 GW
0.5 – 1.5 GW
3 + GW
And floating wind
• Marine & sub-sea operations
• Marine engineering and fabrication
• Design engineering
• Advanced manufacturing
• Aerospace and composites
• Electrical, hydraulics and power
systems
• Environmental sciences
• Consultancy and support services
Economic Opportunity for Wales and SW
Key Challenges
Confusion and mistrust – stakeholders and investors
Lack of understanding regarding costs and technology
Political focus on grand schemes
Tidal range does not have a priority
Economic valuation and financial models
Costs are still too high to support large scale projects
New strategy for Sustainable Severn
England & Wales
£ $ € ¥
Investors
• Governance structure
• Holistic marine spatial plan
• Long term energy strategy
• Technology development
• Industrial strategy
• Co-investment model
• Economic and technical evaluation
