8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
1/24
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
2/24
Ocean Energy by Wave
D n nd th WECs
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
The Potential of Wave Energy
Denmarks consumption of electricity: 3,7 GW
Wave energy, Danish west coast (offshore):
Up to 25 MW/km
Average ~16 MW/km ~150 km available, ~2,4 GW
At North Atlantic European Coasts: 25 - 75MW/km
In the Mediterranean: 4 - 11 MW/km
Total potential off European coasts: ~320 GW
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
3/24
Ocean Energy by Wave
D d th WECs
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Principles for Utilisation of Ocean Energy
(Waves)
Oscillating Water Columns
Overtopping devices
Point absorbers
And many others
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
4/24
Ocean Energy by Wave
D d th WECs
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Oscillating Waver Columns
WaveGen, Islay Pico, Azores Energetech, AU
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
5/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Overtopping devices
Wave Dragon, Nissum Bredning SSG, Kvitsy
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
6/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Point absorbers
Wave Star AquaBuOY AWS, Portugal
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
7/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
And some of the others
Wave Rotor Pelamis, Orkney
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
8/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
State of the art
Rougly 10 prototype devices installed
First 3 commerciel units sold
European Wave Energy Organization formed
Technology verified
Technology currently relying on subsidies
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
9/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Wave energy in 10 20 years
EU will push the development until 10-20well functioning devices have been installed
The time scale (due to the large size of the
devices delays the development Energy price: 0.12-0.25 /kWh
A lot depends on political will the comingyears (ie. political stability in the Middle
East, Russia etc., price of oil) Security of supply is an important factor
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
10/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
The Wave Dragon Case
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
11/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Wave Dragonprinciple
Turbine outlet
Reservoir
Waves overtopping the
doubly curved ramp
The Wave Dragon is a slack-moored wave energy converter that can be
deployed alone or in parks wherever a sufficient wave climate and a water
depth of more than 25 m is found.
Climate Power production
24 kW/m 12 GWh/y/unit
36 kW/m 20 GWh/y/unit
48 kW/m 35 GWh/y/unitWave reflector
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
12/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Wave Dragon partners/subcontractors Lwenmark F.R.I, Inventor, Consulting Eng. (DK)
SPOK ApS, Project Management Cons. (DK) MT Hjgaard A/S, Construction Enterprise (DK)
Aalborg University Hydraulics & Coastal EngineeringLaboratory (DK)
Balslev A/S, Consulting Engineers - electrical andautomation systems (DK)
Niras as, Consulting Engineer, Wave forecasting models
(DK) Armstrong Technology Associates Ltd., Naval Architects
(UK) (Babcock Design & Technology)
VeteranKraft AB, Consulting Engineers - hydro turbinedesign (S)
Nhrlind Ltd, Research & Business strategy development(UK)
Technical University Munich, Hydro turbine testing andCFD modelling (D)
Kssler Ges.m.b.H., Manufacturer of hydro turbines (A)
ESBI Engineering Ltd. (IE)
Wave Energy Centre, Lisbon (PT)
Rozmerovy Nacrte (CS)
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
13/24
Ocean Energy by Wave
D d th WEC
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Nissum Bredning, DenmarkThe wave climate in scale 1:4.5 of the North Sea
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
14/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable Energies
ISET 9 10/2 2006
Measuring equipment Pressure transducers
Accelerometers Force transducers
Movement transducers
Strain gauges
Online monitoring
Performance, WebCams, weather
Wave Dragon
RTD activities
WD prototype fully equipped Turbines 1+6+3
Grid connected generators
Floating level control system
Two different test sites Close to Danish Wave Power
Association's test site
Further south-east where more
wave energy is available
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
15/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
First offshore wave energy converterproducing power to the grid, May 03
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
16/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Prototype overtopping measurements
0.0000
0.0005
0.0010
0.00150.0020
0.0025
0.0030
0.0035
0.0040
0.00 0.05 0.10 0.15 0.20
R*
[ - ]
Q* [-].
Hald & Frigaard (2001)
WD-NB 05-15.12.03
)40exp(025.0 ** RQ *Q
LgH
sq
s
op
3
2=
R* =2
op
s
cs
H
R
Bulk overtopping data:
Wave directionality, limitedweather vaning
Dummy turbines notincluded
Spilling and leakage
Conclusion:In ordinary, well controlled,operational conditions, theovertopping rates are
as expected indicationsof even higher rates undercertain circumstances.
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
17/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Power Take Off
Propeller turbine PM Generator Frequency inverter
Optimal turbine/generator speed found from turbine characteristics based onmeasured head
PLC controls frequency inverters to obtained optimal speed
Frequency inverters reports generator and net data back to PLC
Turbines:
Propeller
Cylindergate
Efficiency ~90 %
Low-head
Variable speed
PMGs:
2.5 kW each
Directly axle-
connected to turbines
Suitable for frequent
start/stop
PMG and grid
frequency inverters:
Downscaled 250 kW
wind turbine inverters
230/400VAC/50Hz
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
18/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Energy production, example041213_WD_133:
Hs = 0.621 m
FL = 0.454 m Crest level ratio: 0.73 Ave. flow: 1.036 m3/s Ave. Act. Power: 0.92 kW (3.3 %) Ave. Est. power: 2.47 kW (8.9 %) Ave. Hydr. Power: 4.41 kW (15.9 %) Turbine utilization:
2 4 5 8 9 10:99 91 71 40 29 22 [%]
Working near full capacity
0
2000
4000
6000
8000
10000
12000
14000
16000
0 200 400 600 800 1000 1200 1400 1600 1800
Time [s]
Po
wer[W]
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Flow[m^3/s]
PowerProd [W ]hydPowerProd [W ]EstPowerProd [W]Flow [m^3/s]
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
19/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
PTO experiences
No PTO turnkey solution initially available for WD WD PTO designed and installed
A working WD PTO is now a reality
Child deceases pointed out solvable, but requiresengineering
It is not trivial to take known and proven technology to anew environment
Since it is unlikely that all problems have been seen yet,further testing at reduced scale and in real seaenvironments is needed
Long term testing still required in order to provide reliabledata for formulation of O&M procedures
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
20/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Availability May 2003- Jan. 2005Power production Test Down time Re-construction
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
May 03 Aug. 03 Nov. 03 Feb. 04 May 04 Aug. 04 Nov. 04
Continuous product ion Test ingRe-co ns tru ct io n Ou t of o pera tio n
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
21/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Further developmentsModification of shoulder connection:
Reduction of forces and movements. Hydraulic power take-off to reduce wear.
Improvement of efficiency by refinement of:
Geometrical design.
Control algorithms for turbine and power take-off operation.
Control algorithms for device stability.
Wave-by-wave forecasting for regulation of turbines.
Floating level adjustment.
Conservative estimates of effect
of refinements (10 15 % on eachitem) justify the stated long term
power production rates
Wave climate 36 kW/m
Width 300 m
Yearly production 20 GWhEfficiency 21 %
Installed capacity 7 MW
Load factor 33 %
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
22/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
Next step Multi MW Wave Dragon prototype: Wales
Research part EU funded: FP6 (STREP)
Welsh objective one funding for deployment in Wales
Venture company found (KP Renewables), contract signed
Design work ongoing
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
23/24
Ocean Energy by WaveDragon and other WECs
ECPE seminar on Renewable EnergiesISET 9-10/2-2006
The Wave Dragon Vision
Seen from 100 feet above sea level and at a distance of 3 miles
Two years operational experience
Wave energy absorption performance verified
Offshore wave energy is a reality
8/8/2019 Tema Eu Ocean Energy Ressource Utilisation
24/24
Ocean Energy by WaveECPE seminar on Renewable Energies
Thank you for your attention!
Top Related