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INNWIND.EU DTU Contributions to WP4.2Offshore wind energyTechnology, ecomony, trends and research
Henrik BredmoseThomas Buhl
DTU organization
2
DTU Wind EnergyTechnical University of Denmark
• Fluid mechanics• Composite and material mechanics• Metallic materials• Meteorology
Sections:• Aeroelastic design• Wind Turbines• Wind energy systems• Test and measurements
Who am I?
Henrik Bredmose
2011- Associate prof. Offshore Wind Energy, DTU Mech. Engng. /DTU Wind Energy
2009-2010 Assistant prof. Offshore Wind Energy, DTU Mech. Engng.
2003-2008 Research engineer, DHI Post doc, Bristol University
2002 PhD from DTU in Wave Hydrodynamics
Loads and structural response of offshore wind turbines
Who am I?
Henrik BredmoseAssociate prof. in offshore wind energyDTU Wind [email protected]
Loads and structural response of offshore wind turbines
Current trends
The North Sea development
Economy as driverfor technology
Future developments
Soil
Facts on offshore wind energy market
Installed capacity
The European offshore wind industry key trends and statistics 2012 (EWEA)
Installed capacity
The European offshore wind industry key trends and statistics 2012 (EWEA)
Market share – wind farm owners
The European offshore wind industry key trends and statistics 2012 (EWEA)
Cumulative 2012
Installed capacity / Work carried out in 2012
The European offshore wind industry key trends and statistics 2012 (EWEA)
Danish tender announced 2013
Danish tender announced 2013
Current trends
The North Sea development
Economy as driverfor technology
Future developments
Soil
Annual investment in offshore wind farms
The European offshore wind industry key trends and statistics 2012 (EWEA)
Investment in offshore wind farms
0
0,5
1
1,5
2
2,5
3
Midd
elgru
nden
Horns R
ev I
Samsø
North
Hoy
le
Nyste
d
Scrob
y sa
nds
Kentic
h Flat
Burbo
Lill g
rund
en
Robin
Rigg
Mill
.€/M
W
Source: Lemming, Morthorst and Clausen: Offshore wind power experiences. Potential and key issues for deployment, Risø-R-1673(EN), Jan 2008
Cost development
Depth and distance to shore
The European offshore wind industry key trends and statistics 2012 (EWEA)2012 average: 22m; 29km
Foundations
Electrical infrastructure
O&M
Why increased?
Offshore wind challenge: Cost of Energy
From the Megavind Strategy for Offshore Wind Research, December 2010
Upscaling?
This requires material development and new designs
28 Risø DTU
Alpha Ventus
The 12 wind turbines at Alpha Ventus are6 Areva Multibrid M5000 6 Repower 5 MW
Areva Multibrid THM 244 t
Repower 5M
THM 430 t
DCAMM 201130
The Enercon wind turbine (gearless)
Enercon
THM 400-500 t
The monopile foundation
Gerrad Hassan and Partners Ltd.
Horns Reef I (Denmark), depth 10-14m
The monopile: Steel tube and transition piece
Applied at depths up to 45mSimple to construct and installCost-efficientDiameter up to 6mDriven up to 30m into the sea bed
Connection of transition pieceAarsleff Bilfinger Berger Joint Venture
DNV
Current trends
The North Sea development
Economy as driverfor technology
Future developments
Soil
Depth and distance to shore
The European offshore wind industry key trends and statistics 2012 (EWEA)2012 average: 22m; 29km
Jacket foundations
Alpha Ventus (Germany)
Gerrad Hassan and Partners Ltd.
Jacket foundations
Gerrad Hassan and Partners Ltd.
Applicable at large depth (e.g. 70 m)StiffVulnerable to fatigueThree- and four legged versionsTransition piecePiled into sea bed
Carbon Trust – Winning concepts 2010
www.carbontrust.co.uk
The suction bucket monotower
Universal Foundations: Suction bucket monotower
The suction bucket monotower
Universal Foundations: Suction bucket monotower
Up to 55m depthCost efficientBehaves like gravity base foundationInstallation by suctionNo rocks (few)Easy removal
Carbon Trust – Winning concepts 2010
www.carbontrust.co.uk
Floating wind turbinesThe Hywind conceptInstalled by Statoil April-June 2009Siemens 2.3 MW wind turbineCatenary moored spar buoy
RISØ offshore course 8-11 November 201042 Risø DTU
Offshore installation 2003
Nysted
72 x 2.3 MW- on a nice day
160.9m x 49m - Jackup on 75m water
Crane capability of 1,200 t
Room for 111 people
Current challenges
The North Sea development
Economy as driverfor technology
Future trends
Soil
WAsP 10 - Google Earth
Optimal wind farm layout?
Cost model
FB=WP−1− psf C 1 rc1−r i
N L
XN L
− psf C 1 rc2−r i
N A
XN A
,
C=CFCICTCE CM
Foundation cost
Electrical infrastructure costCivil engineering infrastructure cost
Installation cost
Maximize Finance balance
Maximize power production (WP)
Minimize cost Minimize
foundation cost Minimize cable
cost Minimize
maintenance
Maintenance cost
Optimal design of substructures
Hot spots in jacket node
Transition piece
Loads and structural response of offshore wind turbines
Current trends
The North Sea development
Economy as driverfor technology
Future developments
SoilHenrik BredmoseAssociate prof. in offshore wind energyDTU Wind [email protected]
