Transcript Severn Tidal Power Feasibility Study

Severn Tidal Power Feasibility Study
1. Call for Proposals
2. Initial Assessment of Options
3. Next Steps
19 September 2008 – Severn Estuary Partnership, Penarth
Peter Kydd
Director of Planning & Environment
Parsons Brinckerhoff
Severn Estuary Tidal Energy
PB BV Consortium
Consortium led by Parsons Brinckerhoff appointed by
BERR on 28th April 2008 to undertake the Assessment of
Options and Strategic Environment Assessment
The consortium is jointly managed by Parsons Brinckerhoff (PB)
and Black & Veatch (B&V) and includes over 10 different
specialist engineering, cost and environmental consultancies.
Severn Estuary Tidal Energy
Route Map – Assessment of Options
Call for Information
SDC Report
Call for Proposals
Long-List of
Potential Options
SEA Reasonable
Alternatives
SEA Scoping &
Early Research
Strategic Locations
SEA Scoping Report
Fair Basis Estimation of
Costs, Programme and
Energy Yield
Assessment
Framework
Optimised Designs,
Detailed Assessment of
Costs, Programme and
Energy Yield
Short-List of
Potential Options
Public
Consultation
SEA Research, Consultation
and Assessment
Preferred Option
Environmental Report and
Appropriate Assessment
Severn Estuary Tidal Energy
Route Map – Assessment of Options
SDC Report
Call for Proposals
Long-List of
Potential Options
Strategic Locations
Fair Basis Estimation of
Costs, Programme and
Energy Yield
Assessment
Framework
Severn Estuary Tidal Energy
Potential Options
Ref
Option Name
B1
Outer Barrage from Minehead to Aberthaw
B2
Middle Barrage from Hinkley to Lavernock Point
(As B3 but lands at Hinkley)
B3
Middle Barrage from Brean Down to Lavernock
Point (Cardiff to Weston Barrage)
B4
Inner Barrage (Shoots Barrage)
B5
Beachley Barrage
F1
Tidal Fence Proposal
L2
Lagoon Enclosure on the Welsh Grounds (Fleming
Lagoon)
L3
General Tidal Lagoon Proposals
R1
Tidal Reef Proposal
U1
Severn Lake Scheme
Severn Estuary Tidal Energy
Initial Options – Minehead to Aberthaw
Ref
Option Name
B1
Outer Barrage – 25TWh per year (conventional Barrage)
F1
Tidal Fence Proposal – 3.5TWh per year (an array of tidal stream turbines
proposed by Pulse Tidal))
R1
Tidal Reef Proposal – 20TWh per year ( a new technology – Rotating
turbine modules using 2 m head) – proposed by Evans Engineering
Severn Estuary Tidal Energy
Initial Options – Cardiff to Weston (and
variants)
Ref
Option Name
B3
Lavernock Point to Brean Down – 17TWh per year (conventional Barrage)
F1
Tidal Fence Proposal – 3.5TWh per year (an array of tidal stream turbines)
B2
Variant of B3 that runs to Hinkley Point rather tha Brean Down (improved
flood defence and grid connections) – proposed by Shawater
U1
Variant of B3 that employs a 1km wide causeway and adds land, leisure
and wave energy developments – Severn Lakes proposal
Severn Estuary Tidal Energy
Initial Options – Upper Estuary Options
Ref
Option Name
B4
Shoots Barrage – 2.77TWh per year (conventional Barrage)
B5
Beachley Barrage – smaller than B4 but avoids blocking the Wye
L2
Welsh Grounds – 3TWh/a Tidal Impoundment proposed by Fleming Energy
L3
Tidal Lagoons – various onshore and offshore locations including options
proposed by Tidal Electric extending throughout the estuary.
Severn Estuary Tidal Energy
Initial Options – Combinations and Modes of
Operation
Potential Combinations
Modes of Operation
Tidal Lagoons + Smaller Barrage
Ebb only
Multiple Tidal Lagoons
Ebb and Flood
Tidal Fence + Smaller Barrage
Pump Assisted
Others subject to further study
Multiple Basins
Severn Estuary Tidal Energy
Fair Basis Cost and Energy Estimates
Application of same principles to all options
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Costs
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Energy Yield
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Applies a consistent energy yield methodology across all options
Construction Programme
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Breaks each option down into a set of Principal Quantities
Applies consistent rates to principal quantities across all options
Applies the same start date to each option and common assumptions on
programme length
Operations
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Common approach to operational costs, maintenance costs and “outage”
assumptions.
Severn Estuary Tidal Energy
Assessment Framework for Initial Options
Initial Screen
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Technical Feasibility
Quantitative
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Energy Outputs and CO2 savings
Levelised Costs
Qualitative
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Environmental Effects
Social / Regional and Economic Effects
Sensitivity Testing
Iterative Approach
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Review and Updating of Options during assessment
Severn Estuary Tidal Energy
Next Steps
To confirm short-list of options:
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Continued dialogue with Proposers to confirm technical data
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Conclusion of technical analysis
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Application of Assessment Framework
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Submission of Conclusions for review by BERR
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Ministerial Review and Public Consultation on Proposed Short-List
Severn Estuary Tidal Energy