TRI-FLOATER FLOATING OFFSHORE WIND...
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TRI-FLOATER FLOATING OFFSHORE WIND TURBINE DESIGN FOR EFFICIENT MANUFACTURING, INSTALLATION AND O&M ROTTERDAM, 15 JUNE 2016
Transcript of TRI-FLOATER FLOATING OFFSHORE WIND...
TRI-FLOATERFLOATING OFFSHORE WIND TURBINEDESIGN FOR EFFICIENT MANUFACTURING, INSTALLATION AND O&MROTTERDAM, 15 JUNE 2016
Indicative cost curves for bottom founded and floating offshore wind turbines
WHY FLOATING?WATER DEPTH
0 50 100 150 200
Co
sts
Water depth [m]
fixed foundations
floating foundations
CAPEX of floating offshore wind turbines
Reference: Carbon Trust, 2015
FLOATING WINDTECHNICAL FEASIBILITY PROVEN, CHALLENGE TO REDUCE COSTS
Statoil Hywind, 2009
Principle Power, 2011 Fukushima Forward, 2013
GOTO FOWT, 2013
0
2
4
6
8
Prototype Pilot farm Commercial
CA
PEX
m€
/MW
Proven semi-submersible technology
Low acceleration levels
Low steel weight
Efficient manufacturing, installation, O&M
GustoMSC Tri-Floater
TRI-FLOATERSEMI-SUBMERSIBLE FLOATING WIND TURBINE FOUNDATION
Hub height above SWL 90 m
Rotor diameter 126 m
Radius to column center 36.0 m
Column diameter 8.0 m
Design draft 13.2 m
Transit draft 7.5 m
Steel structure 1800 t
Outfitting 150 t
Wind turbine 560 t
Water ballast 970 t
Static mooring load 150 t +
Total displacement 3630 t
Reference: Huijs et al, EWEA Offshore 2013
TRI-FLOATERPARTICULARS FOR 5 MW REFERENCE WIND TURBINE
Length scaling factor 1:50
Time scaling factor 7
10-min mean wind velocity 21 m/s
Turbulence intensity 6 %
Significant wave height 7 m
Wave peak period 12 s
Reference: OMAE2014-23217
TRI-FLOATERMODEL TESTS
Demonstrators
Mitsui (Fukushima Mirai)
Mitsubishi (Fukushima Shimpuu)
University of Maine (Volturnus)
Principle Power (WindFloat)
3-COLUMN SEMIPROVEN TECHNOLOGY
Flat steel plating with stiffeners
No bracing
Automated welding
Standardized blocks
Proven structural design similar to GustoMSC designed semi-submersibles
MANUFACTURINGBLOCKS AND FLAT STEEL PLATING
Assembly of blocks on pier
Float-out using own buoyancy
Wind turbine installation with onshore crane
GustoMSC Tri-Floater assembly on a pier
FLOAT-OUTNO DRY-DOCK NEEDED
Installation phase
Cable lay/trenching vessel
Subsea support (multiple)
Seabed preparation
Feeders
Tugs
Foundation installation vessel
Turbine installation vessel
AHTS
Operation & maintenance
Crew supply vessel
O&M vessel (small and large)
(air) dive support
Tugs
INSTALLATIONBOTTOM FOUNDED WIND TURBINES
Installation phase
Cable lay/trenching vessel
Subsea support (multiple)
Seabed preparation
Feeders
Tugs
Foundation installation vessel
Turbine installation vessel
AHTS
Operation & maintenance
Crew supply vessel
O&M vessel (small & large)
(air) dive support
Tugs
INSTALLATIONTRI-FLOATER
Void structure, no active (ballast) systems
No bracing connections
Fatigue sensitive spots all above water level
Two boat landings
Tow back to port possible
GustoMSC Tri-Floater designs 2002 and 2016
MAINTENANCEEASY ACCESS FOR INSPECTION AND MAINTENANCE
Left: Principle Power WindFloat, Portugal, 2011
Vestas 2.0 MW wind turbine
Right: GustoMSC Tri-Floater, artist impression
7 MW wind turbine
FLOATER CONCEPTSSEMI-SUBMERSIBLE
