Tidal Power Technology Review
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Transcript of Tidal Power Technology Review
1 Solway Firth Technical Feasibility Study
Tidal Power; Technologies ReviewSolway; Stakeholder Presentation
Presented by: Dr Malcolm Balls
Date: 28th October 2009
04/24/232 Solway Firth Technical Feasibility Study2 Solway Firth Technical Feasibility Study
The Technologies
• Tidal Barrage:• Arrangement• Equipment• Mode of operation
• Tidal Lagoons:• Land connected• Isolated
• Tidal Reef• Tidal stream• Tidal Fence
04/24/233 Solway Firth Technical Feasibility Study3 Solway Firth Technical Feasibility Study
Tidal Energy Barrage
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La Rance tidal barrage, Brittany
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Arrangement
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•Equipment; TurbinesNote depth of water required for turbines.
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Equipment; Sluices
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Barrage modes of operation; Ebb-generation
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Barrage operation; Ebb-generation with pumping
04/24/2310 Solway Firth Technical Feasibility Study10 Solway Firth Technical Feasibility Study
Barrage operation; 2-way generation
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Comparison of operating modes
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Barrage operation; ebb-generation effect on basin water levels
04/24/2313 Solway Firth Technical Feasibility Study13 Solway Firth Technical Feasibility Study
Tidal Lagoons; Land Connected or Isolated
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Tidal Reef – a low-head barrage arrangement.
04/24/2315 Solway Firth Technical Feasibility Study15 Solway Firth Technical Feasibility Study
Tidal Power Reefs:
• Technology unproven• Design solutions not evident for many features• Reliable estimates of energy yield not available• Large turbines required in large numbers• Operational effects appear more environmentally
acceptable (e.g. larger part of tidal range retained)
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Tidal Stream
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Requirements for tidal stream development
• Current velocity >circa 4m/s• Significant depth of water to submerge turbine at low water• Space to set up array of machines
Advantages:• Small scale & piecemeal development possible• Effect on tidal regime minimized
Challenges:• Turbine design and deployment as yet at prototype stage• Large numbers of machines required for substantial output
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Tidal Fence
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Tidal Fence
• Technology unproven• Design solutions not evident for many features• Reliable estimates for energy yield not available• Large turbines required in large numbers• Operational effects appear more environmentally
acceptable (e.g. larger part of tidal range retained)