Hywind Scotland Pilot Park Click to edit Master text ... Scotland –Technip’s Packages...
Transcript of Hywind Scotland Pilot Park Click to edit Master text ... Scotland –Technip’s Packages...
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Yngve Børstad, Project Manager
Subsea Operations Conference 2016 – Haugesund 11.08.2016
Hywind Scotland Pilot Park – Marine Operations
Agenda
2
Introduction to Hywind
Substructure Transport
Operations at Stord
Towing
Operations at Hook-up
location
Other marine operations
Hywind Demo - 2009
Technip fabricated and installed Hywind
DEMO in 2009
Substructure and mooring EPCI
WTG & Tower delivered by Siemens/Statoil
Subsea cable by Nexans
Assembly at Karmøy
..and now we have been asked to do it again
Hywind Demo
Medium park – Hywind Scotland
Technological Focus
Cost Focus
Market Focus
Model test
Concept & theory
Onshore connected parks
2001
2005
2009
2017
The path from idea to commercial concept
Ref.
Hywind Scotland - Project objectives
Test multiple units in park-configuration
Verify up-scaled design
Optimize assembly and installation
Verify reliability and availability of optimized
multi-turbine concept
Mobilize supply chain
5
Statoil: Demonstrate cost-efficient and low risk solutions for commercial scale parks
Hywind Demo Hywind Scotland
Dimension Hywind Demo Hywind
Scotland
Mass 5300 tons ~11500 tons
Hub height ~65 m ~100 m
Draught 100 m ~75 - 80 m
Diameter of sub-
structure
8.3 m ~14 - 15 m
Water depth 220 m ~95 - 120 m
Rotor diameter ~85 m 154 m
Capacity 2.3 MW 6.0 MW
Hywind Scotland – Technip’s Packages
Substructure transport
Upending
Ballasting
Mating
Commissioning
Tow to field
Anchor installation
Hook-up
Deliveries by others*:Substructure Design - Aibel
Substruture Fabrication - Navantia
Tower Fabrication - Navacel
Wind turbine - Siemens
Anchor Fabrication - Global
Mooring Chain - Vicinay/MacGregor
Tower assembly - Norsea Group
Tower mating - Saipem
Umbilical fabrication - Nexans
Umbilical installation - Subsea 7
*Others – with interfaces connected to Techips marine operations
7
5 off Substructures (CPI) from Spain to Stord
Evaluated 2 alternatives
Semi-sub transport
Normal towing
Operational Synergies:
- SPAR technology and transport methods
- Operational analysis
Montecarlo weather simulations indicated 16 days WOW for the towing
VS.
Substructure transport from Spain
9
Length Substructure: 198 m (~220 m incl protruding pipes)
Diameter: 50 m
..coming soon to a harbour near you..
Aasta Hansteen SPAR
VS.
10
Upending by pumping ~5000Te seawater into each substructure
to achieve required draft
Two phases:
Upending
Final ballasting
Operational Synergies:
- Experience from Hywind Demo
- Operational analysis and 3D simulations
Stability simulations performed with
HydroD (DNV Sesam Software)
Static configuration
Dynamic configuration
Substructure Upending at Stord
11
Pre-installed inshore mooring arrangement
Single barge arrangement for pre-mating activities (upending and solid
ballasting)
Optimisation of assembly siteStord
Floating Quay Setup – Phase I
Operational Synergies:
- Local experience from offshore fabrication
- Personnel working at height
- Use of conventional barges
12
Stord Base Location
Issues with current loads on barge and mooring lines
Alternative locations evaluated
Operational Synergies:
- Contact with Havforskningsinstituttet and MET office
- Local experience from Stord
Floating Quay Setup – Phase I - Solid Ballasting
14
Ballasting water to be replaced with
Magnadense rock
Rock installed by Boskalis
Combined rock installation and water
pumping to maintain constant draught
R
O
C
K
Ballast water
Example of potential location at
Stord
Accommodate mated WTG’s
Commissioning and prepare for towing
Floating Quay Setup – Phase II
17
Analysis of 4 barge solution
Analysis is performed in Diodore
Wind and waves from metocean design basis
Different wind turbulence models used for
calculating the wind forces acting on the wind
turbines
Very high mooring forces are shown, even
before attaching the substructures
4 barge solution considered not viable due to
mooring forces exceeding barge capacity
Operation split to 3 barge solution
Operational Synergies:
- FE Analysis for offshore mooring combined with landbased wind loads
- Internal knowledge of wave and current forces, and tight interface with wind technology
20
Towing spread
4 days tow from Stord to field
Tow analysis in Orcaflex
Tow simulation by Marintek
Survey of the fjord
VIM Concern
Towing test in Trondheim
Tow wire length & chain dimension changed
Less tugs will lead to different vibration modes
Contingency procedures
Operational Synergies:
- Use of Orcaflex for towing simulations
- Experience from towing Hywind Demo and Spars
Towing to Field
21
Anchor installation
Pretensioning of anchors and chains
Final hook-up with MacGregor Pusnes Fairlead Chain Stopper system
Hook-up – mooring systems
Operational Synergies:
- Anchor design and selection method
- AHV chain operations by experienced subcontractors
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Umbilical installation
Operational Synergies:
- Conventional lazy wave configuration for umbilical installation
- Landfall drilling experience