Jacket Installation Vessel

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Jacket Installation Vessel

Challenges in installation of offshore wind in

the future

6 th Blue Conference 2011

SPEAKER: Michael Paulsen, A2SEA A/S

Date: 2 December 2011


A2SEA

SEA ENERGY

2002

SEA POWER

2002

• Started 1 st July 2000

• 100% dedicated offshore wind

• 4 (5) vessels, 260 employees,

>120 mio Euro turnover

• Owned by Dong Energy Power and: 51%

Siemens Wind Power: 49%

• Installed >750 turbines, >340 foundations

SEA JACK

2007

SEA WORKER

2008

WIND

2011

SEA INSTALLER

2012

SEA SERVER

2013?

Crew boats

HR2/Walney 1

2


SEA POWER

SEA ENERGY

• Self propelled

• Leg suspended crane vessels

• Semi jack-ups

• Converted in 2001/02

Installation of turbines, met masts

• Service

• Change of main components

3


SEA POWER

SEA ENERGY

• 32 m legs, water depth: 4.5-24 m

• Feeder vessel

• 2-3 turbines of

2.3MW – 3.0MW size

• 1 turbine of 3.6MW size

4


SEA WORKER

• Modern jack-up barge built 2007

• FAVCO PC 300 crane, 400 t

• 73 m legs, water depth: 4-40 m

• Air-cooled jacking

– dry out locations

• Major upgrade for wind 2008

• 2 turbines of 3.0MW-3.6MW size

• Monopiles 250 t

5


SEA JACK

• Purpose built for offshore

wind 2002

• Manitowac 1200 crane,

500-1000 t

• 50 m legs, water depth: 5-30 m

• 2500 m 2 deck space

• 2 turbines of 5-6MW size

3 turbines of 3.6MW size

5 turbines of 3.0MW size

• Monopiles 5-600 t

Jackets, tripods

6


MV WIND

Chartered service jack-up for

maintenance work

• Self propelled DP jack-up,

built 1996/2010

• 55.8 m legs, water depth: 4 - 35 m

• Liebherr Crane LTR 11200 superstructure

on fixed pedestal

• Crane capacity: 30 tons @ 30 m radius @

100 m height

• Accommodation: 23 single cabins

7


Crew boats

Crew boat operation and

management

• Crewing

• Technical management

• Newbuilding

- Project management

8


SEA INSTALLER

• Ordered Mid-2010 – Cosco

Shipyard, China

• Year of delivery 2012

• Self-propelled jack-up vessel

• Crane: 800 t

• 6.5-45 m of water depth

(depending on tide, penetration)

• 10 x Vestas 3.0MW

8 x Siemens 3.6MW

5 x Repower 6MW

• Self-propelled, DP2, Speed: 12 knots

• Charterers’ Accommodation: 35 single cabins

9


Project Portfolio

Frederikshavn

Robin Rigg

Walney 1 Ormonde (2011)

Horns Rev 2 Sprogø

Burbo Bank

Horns Rev 1

Arklow Bank

Sheringham Shoal

Rødsand 2

(2011) Nysted

Scoby Sands

Anholt (2012/13)

Lillgrund

Baltic 1

Greater Gabbard

Gunfleet Sands

Kentish Flats

Prinses Amalia

Egmond an Zee

London Array (2011/12)

Thanet

Since 2002:

‣ 775 turbines

‣ 325 foundations

10


Water Challenges in Denmark

Site

Water

depths

Sea bed

conditions

Horns

Rev 1 +

2

Nysted /

Rødsand

II

Sprogø

Samsø,

Tunø

Middelgrund

Anholt

Kriegers

Flak K 1

Kriegers

Flak K 2

7 -17 m 6 -12 m 6 -16 m 2-13 m 14-17 m 20-25 m 19-32 m

Hard /

sand

Hard /

clay

Hard /

clay

Varying

Ordinary

/ soft

Varying

Varying

Current 1 kn < 1 kn < 1 kn < 1 kn < 1 kn ≈ 1 kn ≈ 1 kn

Typical

wave

heights

(HS)

1-3 m 0-1 m 0-1 m 0-1 m 0-1 m 0-1.5 m 0-1.5 m

11


Water Challenges Abroad

Site

Water

depths

Sea bed

conditions

UK

Irish Sea

RIII

UK

Horn

Sea

RIII

UK

East

Anglia

RIII

UK

Dokker

Bank

RIII

D

Hohe

See

F

Deux

Cote

26 -74 m 24 -59 m 5 -73 m 18-63 m 39-40 m 9-24 m

Varying Varying Varying Varying Sand Varying

Current 2-3 kn 1-2 kn 1-2 kn 1-2 kn 1-2 kn 2-3 kn

Typical wave

heights (HS) 1-2 m 1-3 m 1-3 m 1.5-3 m 1-3 m 1-3 m

Tide 6-9 m 4 m 4 m 2 m 2-3 m 5-7 m

12


The Challenge

• Maximum weight 5.000t

• Maximum footprint of

35m x 35m

• Maximum monopile length

90m

• Maximum foundation

height 60m

13


Keystone is an Innovative Jacket

14


Jackets, Tripod, Tripile

Bard Offshore 1

Approx. 30

tripiles per June

2011

Alpha Ventus

6 jackets

Ormonde

30 jackets

Alpha Ventus

6 tripods

Bard

15


MBD Sucket Bucket Monopile is Simpler to Install

16


Is floating installation an option?

First installations done

• Greater Gabbard

• Sheringham Shoal

• Ormonde

• Alpha Ventus

• Thornton Bank / Rødsand II / Nysted

– Piles / TP’s

– Piles / TP’s

Jackets

Jackets

– Gravity foundations

17


Monopile and J-Tube arrangement for substation lifted

by floating crane

Photo: Per Aarsleff A/S

Photo: Per Aarsleff A/S

18


Floating Vessel Types

• DP vessels from O&G

sector for piling

operations

• Floating heavy lift

cranes & shear leg

cranes

19


Jacket Installation Vessel

Use of a large size Aframax DP shuttle tanker and convert it to a Jacket Installation

Vessel (JIV).

Why ?

• Reduced cost

• Conversion of existing tonnage

• Minimize the installation time per jacket

• Reduce tug requirement

• Increase flexibility

• Robust to tidal variations

• Not dependent on soil conditions on the

seabed

• Various size and types of jackets

• Increase capacity

• Use of large vessel

(246 m long, 42m wide, 6500m2 deck space)

• Dynamic positioned

• Weather robust

• Space and capacity in top class

20


Jacket Installation Vessel

21


From Oil to Wind

22


Tower

Tons

Today’s Offshore Turbines

800

350

700

300

600

250

500

200

400

REpower 6M

150

Nacelle

Tons

300

200

100

Siemens 3.6M

Vestas 112V

Multibrid 5M

100

50

0

Vestas 90V

Siemens 2.3M

0

23


Offshore Turbines

2-3 MW 4-5-6-7MW 10MW

Vestas 2.0 3.0 7.0

Siemens 2.3 3.6 6.0

REpower 5.0 6.0

AREVA Wind 5.0

Gamesa 4.5 5.0 7.0

GE 4.0

BARD 5.0 6.5

Nordex 4.0+ 6.0

2B 5.0

Clipper 10.0

XEMC Darwind 5.0

3-4 Chinese

exporters

24


The Challenge – Nacelle Weights

200-400 t?

130-350 t

150-350 t

100 t

70 t

2000 2005 2010 2015 2020

25


The Challenge – Rotor Diameters

Wembley Stadium

Football Pitch

135 – 165 m

???

m

120 m

25 m

50 m

80 m

90 m

1990 1995 2000 2005 2010 2015

2020

26


The Challenge – Hub Heights

70 m

80 m

90 m

100 m 120m?

2000 2005 2010 2015 2020

27


New Vessels for Offshore Wind

A2SEA: SEA INSTALLER

RWE: Friedrich Ernestine / Victoria Mathias

Van Oord

MPI: Adventurer / Discovery

Fred Olsen Windcarrier: Bold Tern / Brave Tern

28


New Vessels for Offshore Wind

HGO Infra Sea Solutions

Swire Blue Ocean

Swire Blue Ocean

29

Seafox 5


Other vessels will be required as well…

• Cable laying vessels

• Personnel transfer vessels

• Tugs

• Hotel ships

Totally 52 different vessels involved in Horns Rev II.

Totally up to 30 different vessels on the site at a time.

30


Challenges on foreign markets - Authorities

• Approvals

• Which rules apply

• Which authorities are involved

• Who are to / are able to / will approve

• TTT = Things Takes Time

• Local contacts

• Trade associations

• Guidelines

• Experience gained / kept

Photo: Mike Page


• Decide the logistic flow for;

• Foundation installation

• Turbine installation

• Cable Installation

• Cost / Time

• Contingency

• Storage

• Risk (delivery / handling /

damage)

• Safety

Challenges on foreign markets - Logistic

32


Conclusions:

• Exchange know-how

• Co-operation

• Industrialisation

• Standard design

• Foundations

• Turbines

• More efficient harbours

• Loading time / waiting time

• Year-round Operation

• Lower charter rate

• Utilizing facilities

• Larger & faster vessels

• Loading capacity

• Shorter installation time

• Shortening mobilisation /

demobilisation time

• Less wasted time between projects

• Less weather downtime

• More installation time

• Experienced crew

• Efficiency

Offshore Wind Installation

• Done at lower cost per installed MW

• Delivery on time

33


Any questions?

Thank you for listening

Photo: Tony West/Vattenfall

34

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