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WIND FARM THORNTON BANK PHASE I Hydrographic Society Benelux – Dordrecht 05 maart 2008

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Wind Farm Thornton Bank Phase I. Dordrecht, 5 maart 2008

TRANSCRIPT

Page 1: DEME, Dredging International

WIND FARM THORNTON BANK PHASE I

Hydrographic Society Benelux – Dordrecht 05 maart 2008

Page 2: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

Project

Page 3: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 3

Project

Page 4: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 4

Project

The Project THORNTON WIND FARM

Phase 1 6 WTG’s, 1x 150kV marine cable to be operational in 2008

Phase 2 18 WTG’s, offshore trafo platform to be operational in 2010

Phase 3 18 WTG’s, 1 x 150 kV marine cable to be operational in 2011

Phase 4 18 WTG’s to be operational in 2012

Page 5: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 5

Phase 1

Phase 2

Phase 3

Phase 4

Trafo

Phases

Page 6: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 6

60 wind turbines 5 MW

Installed capacity 300 MW

Annual generation 1000 GWh

Annual consumption of 600.000 inhabitants

Avoided CO2 emission: 450.000 tonnes/year ~ forest 90.000 ha

C-Power NV is a Belgian company established for the development and implementation of a farshore wind farm on the Thorntonbank.

Page 7: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 7

Client

Page 8: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 8

Shareholders:

Project Lenders: Owner’s Engineer: Certification Bodies:

The Client: C-POWER

Page 9: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 9

Objective

Page 10: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 10

In the context of the world climate conferences and the Kyoto declaration, Belgium has accepted the obligation to reduce greenhouse gasses emissions with 7.5% by 2010 compared to the 1990 emissions level.

source: Belgium’s Greenhouse Gas Inventory (1990-2004) – April 2006

Green House Gas emissions contribution by sector in 2004

Industry (Energy)20,1%

Transport18,5%

Other (energy)21,8%

Fugitive emissions0,4%

Agriculture7,7%

Solvent and Other Product Use

0,2%

Energy Industries20,1%

Waste1,1%

Industries (processes)

10,2%

Page 11: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 11

Evolution Green House Gas emissions for the period 1990-2004

source: Belgium’s Greenhouse Gas Inventory (1990-2004) – April 2006

In the context of the world climate conferences and the Kyoto declaration, Belgium has accepted the obligation to reduce greenhouse gasses emissions with 7.5% by 2010 compared to the 1990 emissions level.

Page 12: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 12

primaryenergy need

100%

objective2010: 12%

share1999: 6%

renewable energy

EU objective renewable energy

In accordance with the Kyoto agreement and the world climate conferences, a European Directive (EU/77/01) was issued on 27 September 2001. The EU target aims at generation from renewable energy sources corresponding to 12% of primary energy requirements by 2010.

Page 13: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 13

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Source: EWEA

Renewable Energy Production: %/ 1997

EU Renewable Energy Production Objective: %/ 2010

The graph below shows that Belgium (and Luxembourg) has been given the lowest target in absolute terms (6%).Since there are so few renewable forms of energy installed here, in relative terms Belgium has to achieve the greatest increase (x6) in renewable forms of energy in the whole European Union.

Page 14: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 14

At present wind energy is capable of making the most economical and realistic contribution towards achieving this desired increase in renewable energy sources.

European wind energy increase

0

10000

20000

30000

40000

50000

60000

1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006

Source: EWEA

0

1000

2000

3000

4000

5000

6000

7000

8000

Installed wind power capacity (MW)

Yearly increase (MW)

Page 15: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 15

At present wind energy is capable of making the most economical and realistic contribution towards achieving this desired increase in renewable energy sources.

Global cumulative installed capacity 1995-2007

4800 6100 7600 1020013600

1740023900

31100

39431

47620

59322

74133

94122

-5000

5000

15000

25000

35000

45000

55000

65000

75000

85000

95000

1995 1997 1999 2001 2003 2005 2007

Source: EWEA

MW

Page 16: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 16

1980 1995 2000 20041985 1990

50 KWh 24mØ 15m

100 KWØ 20m

500 KWØ 40m

600 KWh 43m Ø 50m

2.000 KWh 80mØ 80m

5.000 KWh 114mØ 124m

h= hightØ= rotor diameter

Source: EWEA

Moreover, a worldwide trend can be perceived towards larger installed capacities.

Page 17: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 17

Source EWEA / Make Consulting

The development of offshore wind

Page 18: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 18

0%

1%

2%

3%

4%

5%

6%

7%

2004 2006-2008 2010

objective

c-power contribution

existing

To meet the European target for renewable energy, Belgium aims to generate 6% of its electricity from renewable energy sources by 2010. In this way it can fulfil the European target for Belgium.

Page 19: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 19

Location

Page 20: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 20

Page 21: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 21

The international borders and the outline of the Belgian Continental Shelf

(BCS)

Due to the relatively small area of Belgian territorial waters and the large number of limiting factors, the range of possible locations for offshore wind power parks is severely limited.

Page 22: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 22

Due to the relatively small area of Belgian territorial waters and the large number of limiting factors, the range of possible locations for offshore wind power parks is severely limited.

The location of the Thorntonbank

Page 23: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

Due to the relatively small area of Belgian territorial waters and the large number of limiting factors, the range of possible locations for offshore wind power parks is severely limited.

Major international shipping routes

Page 24: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 24

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

The various mile zones

Page 25: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 25

Sand reclamation areas

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 26: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 26

The military zones

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 27: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 27

Gas pipes and telecom cables

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 28: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 28

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Wildlife preservation areas

Page 29: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 29

Radar range

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 30: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 30

The Flemish sandbanks outside the 12 NM zone

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 31: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

Dedicated area for offshore wind turbines

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 32: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

Wind Farm construction in the North Sea: current project proposals

A number of other uses have already been licensed within the BCS.The area available for new wind farms is therefore severely limited.

Page 33: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

Detail of the Thornton Bank showing all current user functions

Page 34: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

The C-Power land area concession

Detail of the Thornton Bank showing all current user functions

Page 35: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

The C-Power land area concession

The wind turbine configuration within the land area concession

Detail of the Thornton Bank showing all current user functions

Page 36: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 36

0

5

10

15

20

25

30

0 5 10 15 20 25 30

Average distance to the coastt (km)

Avera

ge d

epth

(m

)

Project

Capacity (MW)km

offshore

depthm

year of constructio

nnumbe

rcapacity total

Vindeby (DK-Balt zee) 11 0.45 4.95 1.5 2-5 1991

Lely (NL-Noordzee) 4 0.5 2 0.8 5-10 1994

Tunö Knob (DK-Balt zee) 10 0.5 5 6 3-5 1995

Dronten (NL-Noordzee) 28 0.6 16.8 0.02 5 1996

Bockstigen (S-Balt zee) 5 0.55 2.75 4 5-7 1997

Blyth (UK-Noordzee) 2 2 4 1 8.5 2000

Between 1990 and 2000 the first trial projects for wind turbine parks at sea were built. These were characterised by wind turbines with low power and they were installed in very shallow waters close to the coast.

Page 37: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 37

 Project

Capacity (MW)km

offshoredepth

mYear of

constructionnumber capacity total

Middelgrunden (DK-Balt Sea) 20 2 40 2-3 3-6 2000

Yttre Stengrund (S-Balt Sea) 5 2 10 7 8-10 2001

North Hoyle (UK-North Sea) 30 2 60 7-8 12 2003

Scroby Sands (UK-North Sea) 30 2 60 2,5 2-10 2004

Q7 (NL-North Sea) 60 2 120 23 20-25 2007

Robin Rig (UK-North Sea) 60 3 180 9 3-21 2008

0

5

10

15

20

25

30

0 5 10 15 20 25 30

Average distance to the coast (km)

Avera

ge d

epth

(m

)

From 2000 on nearshore multi-megawatt projects were developed in Europe.

Page 38: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 38

200515-208-10992.7536Noorzeewind (NL-Noordzee)

20036-9.59-141582.272Nysted-Rödsand (DK-Balt Zee)

20026-1414-20160280Hornsrev (DK-Noordzee)

200212-184-8232.310Samsø (DK-Balt Zee)

20007-10810.51.57Utgrunden (S-Balt zee)

totalcapacitynumber

Year of constructio

n

depth m

km offshor

e

Capacity (MW) Project

0

5

10

15

20

25

30

0 5 10 15 20 25 30

Average distance to the coast (km)

Avera

ge d

epth

(m

)

From 2000 on nearshore multi-megawatt projects were developed in Europe. C-Power’s partner and shareholder DEME is through her group companies involved in the offshore construction works of five of these projects.

Page 39: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 39

The Thorntonbank project will serve as a pioneering farshore project in Europe in terms of:

distance from the coast

average water depth

installed capacity

0

5

10

15

20

25

30

0 5 10 15 20 25 30

Average distance to the coast (km)

Ave

rage

dep

th (m

)

Page 40: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 40

Projects where C-Power partner and shareholder Dredging International and its sister companies of the DEME group were involved.

Utgrunden, Sweden

Page 41: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 41

Projects where C-Power partner and shareholder Dredging International and its sister companies of the DEME group were involved.

Samsø, Demark

Page 42: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 42

Projects where C-Power partner and shareholder Dredging International and its sister companies of the DEME group were involved.

Horns Rev, Denmark

Page 43: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 43

Projects where C-Power partner and shareholder Dredging International and its sister companies of the DEME group were involved.

Nysted Rødsand, Denmark

Page 44: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 44

Projects where C-Power partner and shareholder Dredging International and its sister companies of the DEME group were involved.

Beatrice Windfarm, Scotland

Page 45: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 45

Windfarm related projects

Belgium, Westhinder 1993Piling works for the installation of a new meteostation in the North Sea.

UK, Lynn and Inner dowsing 1998Meteomast installation in the North Sea near Skegness

Sweden, Utgrunden 2000Monopile foundation and turbine installation.

Denmark, Horns Rev 2002Erosion protection works around windfarm monopiles

Denmark, Samsoe 2002Design, supply and installation of monopile foundations + wind turbines.

Belgium, Radartower Oostdijkbank 2002Construction & delivery of radar, transmission equipment, heli-platform & accommodation.

Denmark, Rodsand 2003Installation of offshore transformer station

Holland, Egmond aan Zee2003Foundation and installation of metomast.

Belgium, Thorntonbank 2004Soil investigation campaign incl. drilling, sampling, pressiometer testing & CPT testing.

UK, Greater Gabbard 2004Soil investigation campaign. Drillings up to 35 m below seabed.

UK, London Aray 2004Soil investigation campaign. Drillings and CPT’s to 50 m below seabed.

Scotland, Beatrice Field 2006Installation of windmill foundation and turbines.

UK, Gunfleets Sands 2007Soil investigation campaign. Drillings and CPT’s to 35 m below seabed.

Page 46: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 46

Wind Turbines

Page 47: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 47

Rated power: 5 MW Rotor diameter: 126 m Hub height offshore: 94 m

Rated power: 5 MW Rotor diameter: 126 m Hub height offshore: 94 m

Page 48: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 48

Nacelle weight: 315 tons dimensions: 18 x 6 x 6 m

Nacelle weight: 315 tons dimensions: 18 x 6 x 6 m

Page 49: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 49

Tower section (2 parts) weight (each): 120 tons dimensions: 37,5 x 6 diam.

Tower section (2 parts) weight (each): 120 tons dimensions: 37,5 x 6 diam.

Page 50: DEME, Dredging International

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2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 50

Rotor Blade weight: 17.8 tons width: 4.6 m length: 61.5m

Rotor Blade weight: 17.8 tons width: 4.6 m length: 61.5m

Page 51: DEME, Dredging International

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2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 51

Rotor Blade Static test: max. deformation 17 m

Rotor Blade Static test: max. deformation 17 m

Page 52: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 52

18

4 m

10

2 m

184m

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2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 53

Next slide >>>

Page 54: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 54

Design and manufacturing at Karlskrona

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

Marine High Voltage Cable

Page 55: DEME, Dredging International

1. Project

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3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 55

ABB (Sweden):

Design and manufacturing of the marine cables

1 x 38.000 m of 150 kV cable

(diam 22 cm, weight 81 kg/m)

6 x 500 m of 33 kV cable

(diam 13,6 cm, weight 26 kg/m)

Page 56: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 56

Construction phase

Page 57: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 57

THV SEAWIND (Belgium):Marine and Electrical Infrastructure

Non integrated Joint Venture with Dredging International NV as JV sponsor/leader

Page 58: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 58

Marine Infrastructure (Dredging International NV)

Soil investigation DI/GeoSea

Design GBF’s COWI

Construction of GBF’s CFE/MBG

Dredging activities DI

Installation GBF foundation layer Tideway

Marine Installation of GBF’s DI/SCALDIS

Backfill/ Infill of GBF’s DI/BDC/DBM

Scour protection around GBF’s DI/DBM

Lifting & installation Wind Turbines GeoSea

Page 59: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 59

Construction phase

Soil investigation

Page 60: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 60

Page 61: DEME, Dredging International

1. Project

2. Client

3. Objective

4. Location

5. Wind Turbines

6. Marine High Voltage Cable

7. Construction phase

8. Planning

9. Questions

10/04/2023 61

Page 62: DEME, Dredging International

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Construction phase

Design GBF’s:

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10/04/2023 64

Physical modelling at DHI (Danish Hydrological Institute)

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10/04/2023 65

Detail of a lifting lug

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10/04/2023 66

Construction phase

Construction of GBF’s:

- Construction of the gravity based foundations

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 67

NOORDZEE

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10/04/2023 68

Construction of GBF’s: Halve Maan Oostende

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10/04/2023 69

• Total weight GBF: 2.800 ton• Height: between 38,5 and 44 m • Diameter foot: 26 m

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10/04/2023 70

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10/04/2023 71

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10/04/2023 72

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10/04/2023 73

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10/04/2023 75

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10/04/2023 76

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10/04/2023 80

Status GBF’s

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10/04/2023 82

Construction phase

Dredging activities

Dredging and foundation w orks

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 83

Dredging of the loose sand layer (-24.0 TWA) by a TSHD

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10/04/2023 84

removal of spill and sedimentation just before placing GBF foundation layer

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10/04/2023 85

Construction phase

Installation GBF’s foundation layer

Dredging and foundation w orks

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 87

Fall pipe with ROV (remote operated vehicle)To place the stones within the required tolerancex

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10/04/2023 88

Construction phase

Marine Installation of GBF’s

Marine Installation of GBF’s

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 89

by shear leg floating crane RAMBIZ

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10/04/2023 90

Transport & installation of the gravity foundations

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10/04/2023 91

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10/04/2023 92

Construction phase

Backfill/Infill of GBF’s

Backfill / Inf ill of GBF’s

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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Multi purpose pontoon Thornton I

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Backfill

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Infill

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10/04/2023 96

Vlaanderen XXI

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10/04/2023 97

Construction phase

Scour protection

Scour Protection

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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Scour protection

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10/04/2023 99

-Filter layer 0.6mArmour layer 0.7m

Dumping grid

Multi purpose pontoon Thornton 1 using fall pipe facilities DP DT operated

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10/04/2023 100

Construction phase

Lifting & installation Wind Turbines

Lifting & installation Wind Turbines

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 101

Lifting of tower section

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Lifting of nacelle

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Lifting of nacelle

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Rotor Installation

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Construction phase

Electrical Infrastructure

Electrical Infrastructure

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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10/04/2023 106

OFFSHORE (Dredging International NV)

Prelay dredging (Vaargeul 1) DI

Crossing existing PEC cable GeoSea/DEC

Landfall/ Dunecrossing (HDD) GeoSea

Cable laying & posttrenching Tideway

ONSHORE (Fabricom-GTI)

Cable laying & trenching FAB-GTI

Grid connection FAB-GTI

Electrical Infrastructure

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Construction phase

Electrical Infrastructure

Landfall/ Dunecrossing (HDD)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

Landfall/ Dunecrossing (HDD)

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Landfall/ Dunecrossing (HDD)

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10/04/2023 109

Landing of the h-v cable will take place by means of directional drilling (30m below dune surface)

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Construction phase

Electrical Infrastructure

Crossing existing cable

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 1/10/2008

2007 2008

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Prelay dredging (Scheur) with TSHD

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Crossing existing PEC cable

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Cable laying & trenching OFFSHORE

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10/04/2023 115

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10/04/2023 117

For submarine transportation the cables are buried in the sea bed.Consequently no high-voltage pylons will be built for the C-Power wind farm.

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10/04/2023 118

HubRotor Bearings

GearboxConverter

Onboard-Crane

Transformer

Generator

Yaw System

In the wind turbine the power that is generated is transformed to a voltage level of 33,000 volts (33kV).The electric components of the REPOWER 5MW turbine are located in the rear part of the nacelle.

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Between the wind turbines a 33 kV cable network is laid for transportation of the power that is generated to the offshore transformer platform.

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On the offshore transformer platform step-up transformation takes place to transform the power that has been collected to a higher voltage (150 kV). This is necessary to limit wastage when transporting power over longer distances. The total distance from the transformer station at sea to the grid injection point on land is approximately 40km.

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The TWO submarine cables (150kV) between the offshore transformer platform and the public 150kV grid on land are responsible for transporting the power that has been generated. For the submarine part of the route (about 36 km) the cables are buried in the sea bed.

22 cm

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Planning

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2007Site “Halve Maan”

• soil improvement works• foundation slabs and beams

Dune crossing (HDD)

Design of the GBF’sConstruction of the GBF’s Installation of the land cables

2008Finishing of the GBF’s

Installation of the appurtenances (boat landing, ladders)

Weighing and transport on land of the GBF’s

Transport on sea and installation of the GBF’s

Backfill / Infill of the GBF’s

Installation of the scour protection

Installation of the marine cables

Grid connection

Installation and commissioning of the WTG’s

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ONSHORE ACTIVITIES- Construction of the gravity based foundations

- Execution beach and dune crossing

- Installation of the cable onshore betw een

the Godtschalckstraat and HV station Slijkens

OFFSHORE ACTIVITIES- Installation of the gravity based foundations

- Supply and installation of the cables offshore

- Installation of the w indturbines offshore

COM M ISSION AND START UP OF PHASE I 1/10/2008

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

2007 2008

Overall planning

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10/04/2023 125

Investment Cost Phase 1 (6 WTG): € 152.8 million Development/

EngineeringInsurance

Finance

Contingency

Cable connection

Foundation

Windturbines

Cost

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Questions

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