02-12-2010

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First Power Production Results from theWave Star Roshage Wave Energy Converter

Laurent Marquis, Head of Development , Wave Star A/SMorten Kramer, R&D engineer, Wave Star A/S

Peter Frigaard, Head of Civil Engineering Department, Aalborg University

3rd International Conference on Ocean Energy, 6 October, Bilbao

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The Wave Star machinesThe Wave Star machines

Test machine at Aalborg University• Deployment: 2004-2005• Scale: 1/40• Float diameter: 0.25 m

Test machine at Nissum Bredning• Deployment: 2006-2010• Scale: 1/10Scale: 1/10 • Float diameter: 1.0 m

Test section at RoshageTest section at Roshage• Deployment: 2009->• Scale: 1/2• Float diameter: 5.0 m

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Wave Star make use of a unique conceptWave Star make use of a unique concept

• 2 rows with10 floats, 20 floats total• The floats are mounted on a machine which is founded on the seabed• All the moving parts are located above the waterlineg p• Hydraulic fluid is pumped from each float to a hydraulic motor, which drives a generator• The Wave Star machine can lift the floats out of the water into safety position

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Wave Star scale 1:40 Aalborg University, Denmark

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Normal operation

Storm protection mode

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More than 4 years in operationand 15 storms without damage

Wave Star scale 1:10 Nissum Bredning, Denmark

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The location for the test section (photo taken before deployment)

6Energy Supply Chain June 20096

Roshage Pier, location for the Wave Star scale 1:2 test sectionHanstholm, Denmark

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The machine was built in Gdansk and towed to Denmark in August 2009

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The jacking system was tested in dry dock in Frederikshavn, Denmark

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The machine was installed on 18 September 2009

Vid

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Video:Installation

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The 19th of September 2009 the installation was finalizedand the machine was placed in storm protectionp p

Video:Storm protection

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A bridge was built during the autumn 2009,and the first guests visited the plant during COP15and the first guests visited the plant during COP15.The machine has been supplying electricity to the grid since February 2010.

Video:Operation

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The Roshage test unit is a sectionof the complete machineof the complete machine

Parameter Roshage test unit Commercial Wave Star C5-600 kWNumber of floats 2 20Float diameter Ø5 m Ø5 mA l th 10 10Arm length 10 m 10 mWeight 1000 Tons 1600 TonsNominal electrical power 110 kW 600 kW

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Power measurements fromPower measurements fromthe Roshage test unit

Measured September 2010 (Control generation 3)

Measured June 2010 (Control generation 2)

30 30

( g )

Measured May 2010 (Control generation 1)

Simulation, Control generation 3

15

20

25

r(kW

)

15

20

25

r(kW

)5

10

15

Pow

er

5

10

15

Pow

er

Notes:

0 0.5 1 1.5 2 2.5 30

Significant wave height (m)

0 2 4 6 8 10 12 14 16

0

Wave power (kW/m)

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Notes:• Power is 10 minute average values of harvested power from one float (hydraulic power leaving one cylinder)• The same data are shown in the figures, only the x-axis is different• A typical wave period for the Roshage location is used for the simulated curve

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Power measurements fromPower measurements fromthe Roshage test unit

Measured September 2010 (Control generation 3)Measured June 2010 (Control generation 2)

30 30

Measured May 2010 (Control generation 1)Simulation, Control generation 3ForskVE Limit Curve

15

20

25

r(kW

)

15

20

25

r(kW

)5

10

15

Pow

er

5

10

15

Pow

er

Notes:

0 0.5 1 1.5 2 2.5 30

Significant wave height (m)

0 2 4 6 8 10 12 14 16

0

Wave power (kW/m)

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Notes:• Power is 10 minute average values of harvested power from one float (hydraulic power leaving one cylinder)• The same data are shown in the figures, only the x-axis is different• A typical wave period for the Roshage location is used for the simulated curve

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Approved byApproved byIf the measured production is above the limit,

b idi i d f E iN t

EnergiNet is a non-profit enterprise owned by the Danish Climate and Energy Ministry

Example of measured data from the Roshage test unit (10 min average values):

Measured production Limit for subsidiessubsidies are recieved from EnergiNet

PLC_Datetime AllDataValid Hs Tmean P_TwoFloats ForskVE_limit AboveLimit[%] [m] [s] [kW] [kW] [True/False]

21/09/10 09:20 100 2.08 4.72 48.98 34.24 True21/09/10 09:30 100 1.91 4.31 37.50 28.71 True21/09/10 09:40 100 1.94 4.10 38.02 29.80 True21/09/10 09:50 100 2.01 3.95 33.69 32.07 True21/09/10 10:00 100 2 03 4 47 39 91 32 85 True21/09/10 10:00 100 2.03 4.47 39.91 32.85 True21/09/10 10:10 100 2.17 4.23 42.91 37.42 True21/09/10 10:20 100 2.01 4.39 38.94 32.04 True21/09/10 10:30 100 2.01 4.14 39.84 32.02 True21/09/10 10:40 100 2.10 4.27 40.97 35.12 True21/09/10 10:50 100 2.03 4.01 41.76 32.55 True21/09/10 11:00 100 1.83 4.13 32.29 26.21 True21/09/10 11:10 100 1.97 4.28 37.60 30.71 True21/09/10 11:20 100 1.89 3.91 36.32 28.19 True21/09/10 11:30 100 1.97 4.34 36.78 30.64 True21/09/10 11:40 100 1.93 4.29 40.44 29.50 True21/09/10 11:50 100 1 96 4 34 38 75 30 35 True

15Power numbers in kW are measured harvested power (hydraulic power leaving the two cylinders).Wave climate is calculated using wave measurements at the location.

21/09/10 11:50 100 1.96 4.34 38.75 30.35 True/ /

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Power measurements fromPower measurements fromthe Roshage test unit

Measured September 2010 (Control generation 3)

Measured June 2010 (Control generation 2)

4

4.5

80

90

( g )

Measured May 2010 (Control generation 1)

Simulation, Control generation 3

2 5

3

3.5

4

wid

th (m

)

50

60

70

80

dth

ratio

(%)

1

1.5

2

2.5

Cap

ture

w

20

30

40

50

Cap

ture

wid

Notes:

0 2 4 6 8 10 12 14 160.5

1

Wave power (kW/m)

0 2 4 6 8 10 12 14 16

10

20

Wave power (kW/m)

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Notes:• Power is 10 minute average values of harvested power from one float (hydraulic power leaving one cylinder)• The same data are shown in the figures, only the y-axis is different• A typical wave period for the Roshage location is used for the simulated curve

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Power matrix for a singlegWave Star C5 600 kW machine with 20 floats

Values inside the table are average electrical power to grid in kW.

Wave height Hm0 (m)

Wave period T0,2 (s)

2 - 3 3 - 4 4 - 5 5 - 6 6 - 7 7 - 8 8 - 9 9 - 10 10 - 11 11 - 12 12 - 13 0.0 - 0.5 0 0 0 0 0 0 0 0 0 0 0 0.5 - 1.0 0 49 73 85 86 83 78 72 67 63 59 1.0 - 1.5 54 136 193 205 196 182 167 153 142 132 1231.0 1.5 54 136 193 205 196 182 167 153 142 132 1231.5 - 2.0 106 265 347 347 322 294 265 244 224 207 193 2.0 - 2.5 175 429 522 499 457 412 372 337 312 288 267 2.5 - 3.0 262 600 600 600 600 540 484 442 399 367 340

3.0 - Storm protection

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Perspectives: Wave Star C5Perspectives: Wave Star C5 performance at different sites in Europe

Site Belmullet, IRNominal Power 1200 kWStorm protection Hs > 5 mAnnual production 4.29 GWh

Site EMEC,UKNominal Power 1200 kWStorm protection Hs > 5 mAnnual production 2.88 GWh

Site Wave Hub, UKNominal Power 1200 kW

Site Horns Rev 2,DKNominal Power 600 kWStorm protection Hs > 3 mAnnual production 1.41 GWh

Storm protection Hs > 5 mAnnual production 2.64 GWh Site SEM-REV, F

Nominal Power 1200 kWStorm protection Hs > 5 mAnnual production 2.37 GWh

Site Pilot Zone, PNominal Power 1200 kWStorm protection Hs > 5 mAnnual production 2.87 GWh

Site BIMEP, ES

Nominal Power 1200 kWStorm protection Hs > 5 mAnnual production 2.21 GWh

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C5 Wave Star and C10 Wave Star

• C5• 70 m long • 20 floats of Ø 5 m

•C10•140 m long •20 floats of Ø10 m

• ~ 10-15 m of water depth• 500 kW @ 2.5m Hs

•~ 20-30 m of water depth•6 MW @ 5.0m Hs

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Double size = 11 times more power

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Road Map for Cost of Energy for Wave Star WECBased on average wave energy potential at European sites

1.0

1.1

Based on average wave energy potential at European sites(WEC lifetime: 20 years, Interest of investment: 9%)

Development factorsEnergy production: 1.0Total investment: 1.0Maintenance: 1 0

0.7

0.8

0.9Maintenance: 1.0

0.5

0.6

€/kW

h

0.2

0.3

0.4 Development factorsEnergy production: 1.1Total investment: 0.5Maintenance: 0.8

Development factorsEnergy production: 1.5Total investment: 0 1

0.0

0.1

2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021

Total investment: 0.1Maintenance: 0.5

2020

2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021Year

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Activities in Wave Star at presentActivities in Wave Star at present

• The Roshage test section will actively be used as test platform for Power Take-Off optimization, test of other component/parts, and for gettingTake Off optimization, test of other component/parts, and for getting maintenance data.

• Improvement of the structural design of the C5-machine, and optimization and reduction of systems for future machinesand reduction of systems for future machines

• Focus on reducing production and development cost for the next projects: Expertise from similar industries

• Focus on increasing the Power Take-Off efficiency: In collaboration with innovative companies and universities

A t ith tilit• Agreement with utility company

• Find subsidiaries

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Wave Star cracks the nuts!Wave Star cracks the nuts!

To stay in the sea Take energy out of waves Cost decreasing More efficient PTO

The storm protection strategy effectively protects the Wave Star machines

The Roshage WEC is connected to the grid, and it has produced energy since

The energy costs for the first full WEC will not be competitive to other

The first test results have shown challenges in ensuring a high efficiency ofthe Wave Star machines.

The Roshage WEC has survived several storms with no severe damages and no service afterwards.

has produced energy since January 2010.

The measurementsfits the expected power curve.

competitive to other conventional sources of energy.

The calculated costs has already been decreased b 30 % b t f th t

ensuring a high efficiency of the complete power transmission to the electrical grid.

Projects on improvements i ithby 30 %, but further cost

reduction is needed.are on-going with universities.

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Please visit our website and get updated !updated !

2323www.wavestarenergy.com