development of a tlp substructure for a 6mw wind turbine ...eigen frequencies – mass participation...
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Development of a TLP substructure for a 6 MW wind turbine – use of steel concrete composite material
A cooperation between industry and research institu tions
Frank AdamEERA DeepWind'2016 – 20.01.2016 - Trondheim
© SIEMENS © EnBw© Baltic Taucher
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Floating foundations for offshore - wind turbines
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 2
2009
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2011
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© WindPower Offshore
2014/15
© Mitsubishicorp
2008
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Spar-Buoy Tension Leg BargePlatform (TLP)
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Preliminary GICON-TLP for wind turbines
Components of the platform:
• Cylindrical buoyancy bodies (BB)• Horizontal pipes (HP)• Vertical pipes (VP)• Cantilever beam (CB)• Transition piece (TP)• Ice-breaking Cone (IC)
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 3
Dimensions(L x B x H)
32 m x 32 m x 28 m
TLP Weight incl. sec. Steel
≈ 742 t
Total weight incl. WT ≈ 1062 t
min. # of Anchor points
4
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Objectives for floating offshore wind sub-structures
• Economical solution→ Mass as low as possible
• LCOE as low as possible
• Steel is not the cheapest material
• Steel-concrete composite material wouldbe an alternitve:
• Tension?• Life time?• Surface qualtiy?
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 4
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TLP for OWT
Steel-concretecomponents
Economicalaspects
Pre-design 6MW
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TLP for OWT
Steel-concretecomponents
Economicalaspects
Pre-design 6MW
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Examples for TLPs or TLBs
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 7
Iberdrola
Tank tests 2012
Vertical ropes
TRL 4
IFE
Tank tests 2013
Angled ropes
TRL 3
Glosten
Tank tests 2013
Vertical ropes
TRL 4
GICON®-TLP
Tank tests 2012-14
Vertical and angled ropes
TRL 4
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Path of development
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 8
Mass in t ca. 2000 2214 1790 742
Width in m 70 68 50 32
High in m 25 24 39 28
→ These values are for a 2.3 MW wind turbine (~ 320 t/MW )
© Element 79
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Preliminary Design of a 6 MW substructure
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 9
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TLP for OWT
Steel-concretecomponents
Economicalaspects
Pre-design 6MW
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Pre-Stressed Steel-Concrete shell elemets – state of the art
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 11
Source: T. Utsunomiya (2015). “Design and Installation of a Hybrid-Spar Floating Wind Turbine Platform”. In: Proc. OMAE2015
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Pre-Stressed Steel-Concrete shell elemets – state of the art
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 12
Advantages:
• Modular system• External fabrication –
independently from the yard• Transport via truck or ships
Challenges:
• Lifetime• Tightening
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Centrifugally spun concrete pile
Advantages:
• Modular system• External fabrication –
independently from the yard• Simple pre-fabrication• Good surface via centrifugal
force
Challenges:
• Lifetime• Pre-tensioning• Tightening
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 13
Source: DBZ Deutsche Bauzeitschrift
Source: Europoles
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TLP for OWT
Steel-concretecomponents
Economicalaspects
Pre-design 6MW
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Offshore CapEx breakdown
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 15
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Substructure mass – one economical driver
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 16
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LCOE for the presented design
• First results show the technicalfeasibility of the 6 MW system
• The system will be an economically viable solution
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 17
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TLP for OWT
Steel-concretecomponents
Economicalaspects
Pre-design 6MW
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Requirements for the 6 MW sub-structure
Mass (incl. sec. steel) ≤ 1200 t
Floating stability for the sub-structure and anchor incl. wind turbine
Fabrication – 1 ½ sub-TLPs/week
Aim: 80 TLPs/year
Economical solution for waterdepths ≥ 30/35 m – comparablewith fixed sub-structures
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 19
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Calculation
• ANSYS AQWA for the floating stability
• Analysis → FEM
• Using ULS interface forces for thepre-design (no coupled calculation):
− Normal Force – 7300 kN− Shear Force – 2400 kN− Overturning Moment – 210000 kNm− Torsional Moment – 25000 kNm
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 20
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Mass (incl. sec. steel) ≤ 1200 t
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 21
ConcreteSteel-Concrete-Composite PipesSteel nodes
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Floating stability incl. Wind Turbine
Angle ofAttack X Y Z RX RY180 -0,616 -0,155 -3,014 0,058 0,716135 0,385 -0,495 -2,799 0,078 0,85590 -0,017 -0,661 -2,716 0,164 -7,97045 -0,384 -0,496 -2,801 0,040 0,7360 0,617 -0,155 -3,017 0,098 4,268
DeviationMaximumAcceleration (ms^-2) Rotation(Degree)
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 22
Angle ofAttack X Y Z RX RY180 -0,705 -0,101 -3,281 0,104 11,971135 -0,411 0,590 -3,205 0,105 12,23290 0,002 -0,717 -3,246 0,556 -0,48745 0,408 0,591 -3,209 0,043 12,4260 0,705 -0,101 -3,282 0,013 11,979
DeviationMaximumAcceleration (ms^-2) Rotation(Degree)
Mass 5000t
WaveFreq 0.1Hz
WaveHeight 2m
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Pre-design Maximum von Mises
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 23
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Eigen frequencies – mass participation factors
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 24
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Conclusion
• Coupled simulations
• Basic design of the new steel-concrete components
• Solving logistical issues
• Development of high performance concrete
• Cooperation with the certification body
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 25
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Quellen
WPC Wind Power Construction GmbH Rostock | Carl-Hopp-Straße 4a 18069 Rostock | Dr.-Ing. Frank Adam | 20.01.2016 26
Acknowledgment:
We like to express our special gratitude to the German Federal State of Mecklenburg-Vorpommern, for the financial support provided to the ESG GmbH, a member of the GICON group (project number: V-630-1-260-2012/103).
Prepared by:Dr.- Ing. Frank AdamWPC Wind Power Construction GmbHCarl-Hopp-Straße 4a18069 RostockPhone +49 (0) 174 3236545