1. Tidal Energy
Gen4Wave
Joury Van Gijseghem
19/11/2013
All and any copyrights and other intellectual and industrial property rights, with regard to these files
shall remain the sole property of DEME Blue Energy. Nothing in these files, nor the ideas incorporated
in these, can be used, disclosed or copied without All andprior written consent of the proprietor. rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
the any copyrights and other intellectual and industrial property
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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2. CONTENT
 Introduction
 DEME
 DEME Blue Energy
 What is Tidal Energy
 Resource
 Tidal barrage
 Tidal current
 DBE’s involvement
 DBE’s Tidal Energy Projects in the UK
 Summary
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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3. INTRODUCTION
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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4. DEME – DREDGING ENVIRONMENTAL & MARINE ENGINEERING
6 AXES OF ACITIVITIES FOR TOTAL SOLUTIONS
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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5. DEME ACTIVITIES
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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6. COMPANY PROFILE - DBE
 DBE (DEME Blue Energy) = Member of the DEME Group
(DEME = Dredging, Environmental and Marine Engineering)
 Shareholders DBE:
- 70% DEME
- 30% PMV (Participatie Maatschappij Vlaanderen)
 Focus on the Blue Energy Sector – mainly tidal and wave energy devices
 Supplying services for Blue Energy Projects such as:
- Promotion and Development
- Support in Project Financing
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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7. WHAT IS TIDAL ENERGY?
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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8. RESOURCE
Tides = rise and fall of sea levels
Oceans and seas are acted upon by the
• Gravitational forces of the sun and moon
• Rotation of the earth
Other influences such as wind and barometric
pressure changes, resulting in storm surges,
can also affect the sea water level
Tides vary daily (ebb – flood), monthly (spring – neap)
and can also have a seasonal variability
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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9. * In case of semidiurnal tide (most common)
RESOURCE
Daily stages of tides:
Flood tide
High tide
Ebb tide
Low tide
Sea level rises over several hours, covering the intertidal zone
The water rises to its highest level
Sea level falls over several hours, revealing the intertidal zone
The water stops falling
2x/
day
*
Water levels continuously change as a consequence of moving water masses.
This implies water streams (currents, magnitude is bathymetry dependent)
In this context two main harvesting principles are applied:
Tidal barrage
Tidal current
Main advantage for capturing the resource is its predictability
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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10. TIDAL BARRAGE
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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11. TIDAL BARRAGE
A basin fills and empties according the
tidal stages. This basin can be a lagoon
(natural or constructed) or river mouth
(estuary).
Two ways of using the tidal barrage
turbines:
Ebb Generation
•
•
Flood tide
First hours of ebb tide
•
Remaining ebb hours
filling of basin
sluices are closed in order
to build up hydrostatic head
sluices open
(electricity generation)
e.g. La Rance, France
Two-way Generation
Electricity generation in both ebb en flood tide direction
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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12. TIDAL CURRENT
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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13. Available power
TIDAL CURRENT
Principle
𝑃=
1
𝜌 𝑤𝑎𝑡𝑒𝑟 A 𝑣 3
2
kinetic energy of tidal flow used to drive a tidal turbine
applicable in both ebb and flood tide
direction (yaw system or pitch control)
Turbine types
Most common
 Horizontal axis
 Ducted (horizontal) axis
 Vertical axis
Other
 Oscillating hydrofoil
 Helical screw
 Tidal kite
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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14. TIDAL CURRENT
TEC foundation types
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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15. POWER CURVE AND ENERGY PRODUCTION
nominal
power
cut-in
speed
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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16. Average current speed [m/s]
TIDAL POTENTIAL
<1
1 – 1,5
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
> 1,5
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17. KEY TECHNOLOGY SUPPLIERS
MCT Siemens
Andritz Hammerfest
ARC
Openhydro
Voith
TGL Alstom
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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18. TECHNOLOGY EVOLUTION
Concept
First
Prototype
~300 kW
Lab
Testing
Upscaled
Prototype
~600 kW
First Commercial
Device
~1000 kW
Example MCT:
MCT = Marine Current Turbines (Siemens)
Next Steps:
Arrays (~10 MW)
Farms (~30 – 100 MW)
(Similar to
Offshore Wind)
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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19. OFFSHORE RENEWABLE ENERGY
Offshore wind
Commercial
maturity
Tidal Energy
Wave Energy
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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20. CHALLENGES
 Need for advanced stage technologies of Tidal Energy Converters (TECs):
development of technology towards mature and industrial products
 Installation of TEC components in harsh site conditions (current velocity,
wave/wind interaction)
 Operation and maintenance friendly devices
 Survival in storm conditions (wave interaction)
 Electrical grid: interconnection, grid integration & balancing
 adequate and stable regulations & permissions concerning:
site assesment, environmental aspects & maritime spatial planning
 Economics:
funding (support with Blue Certificates?), financing & insurance
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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21. STATUS TODAY
Only single units, grid connected. E.g. MCT Seagen S 1.2 MW
MCT Technology - SeaGen
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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22. DBE’S INVOLVEMENT
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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23. DBE – TIDAL PROJECTS IN THE UK
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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24. * Figures are currency EUR-GBP dependent
WHY UK?
• Good tidal stream resources
• Political Support (UK Marine Energy Programme)
• Economical support:
 CURRENT support system
o
o
o
Renewable Obligation Certificates (ROCs):
 Tidal projects receive 5 ROCs / MWh
 ROCs can be traded separately from the electricity
 ROC prices are variable according to renewable energy production
Levy Exemption Certificates (LECs): £ 4.85 / MWh
Grey electricity price: highly variable since market dependent
Total varying income = ROCs + LECs + grey electricity price = € 340/MWh
(for 20 years if operational before 2017)
 NEW support system (draft proposed ‘strike price’, June 2013)
fixed feed-in tariff = € 365 per MWh (guaranteed for 15 years)
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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25. WAVE VS. TIDAL ENERGY IN BELGIUM
Available average wave power up to
6,5 kW/m
Limited potential for wave energy
converters for a moderate wave climate
Available average tidal power up to
238 W/m²
no potential for tidal energy
converters
source: OPTIEP – BCP, Optimalisering van de basiskennis over het energiepotentieel op het Belgisch Continentaal Plat (2010)
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Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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26. SUMMARY
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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27. SUMMARY
• Tidal energy has the potential to become the next generation of
offshore renewable energy: it can help to meet the climate change
targets and will bring social & economic benefits
• OEMs (Original Equipment Manufacturers) are getting organized for
further development and supply
• Incentives by governments and Europe are there to launch the
first tidal arrays (e.g. 7th Framework Programme, Horizon 2020,
Feed-in tariffs, etc.)
• First tidal projects are in the pipeline in Europe
• If challenges can be met and first projects prove to be economical
viable, this new industry is ready for commercialization
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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28. QUESTIONS?
All and any copyrights and other intellectual and industrial property rights, with regard to these files shall remain the sol e property of DEME Blue Energy.
Nothing in these files, nor the ideas incorporated in these, can be used, disclosed or copied without the prior written consent of the proprietor.
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