multi-purpose floating structures · 2018-11-05 · large floating coastal structures rational...
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MULTI-PURPOSE FLOATING STRUCTURESØyvind HellanVice President Research, SINTEF Ocean
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Singapore
• Land area: 722 km2
• Population: 5.5 + 1 million • 7796 persons per km2
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Norway
• Total land area: 385 180 km2• Total population: 5.2 millions • 13.7 persons per km2
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Oslo + Bærum + Asker
• Total land area: 750 km2• Total population: 850 000• 1 130 persons per km2
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Singapore
Need for space!
Ambitions development plans:Land reclamationUp in the airUnder groundInto the sea
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Wide apart - yet common interests
Singapore• Support growth and
national development
• Creating space:Moving infrastructure from land to sea
• Oil & Gas Storage• Strategic storage • LNG terminals• Port development • Industrial lands• Housing and residential areas• Recreational areas
Norway• Support growth and
national development
• Connecting people and businesses
• New coastal highway E39: Floating bridges, Submerged bridges
• Port development• Coastal development
Driving directions: 14 313 km189 hours
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Sub-sea tunnels
Large rock caverns –Gjøvik hall
R&D partner: Nanyang University
PartnershipSINTEF – Tritech – Multiconsult 10 years > 100 mill NOKProject Management and Technical review
Background – Norwegian Underground Technology
PartnershipSINTEF – Tritech – Multiconsult 10 years > 100 mill NOKProject Management and Technical review
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Jurong Rock Caverns – Underground subsea hydrocarbon storageFrom research to completed project
Caverns are here– under the water
Client:Consortium: • SINTEF, Tritech and MulticonsultAssignment• Project management• Design review and approval• Technical advisor to JTC
Progress: 2003 NTNU-NTU-SINTEF
initial discussions 2004 SINTEF and Tritech
site investigations2006 STM contract awarded 2008 Basic Engineering
Design completed 2009 Access shafts completed2015 Caverns opened 2019 Project completed
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Water Reclamation Plant10 specified usages in underground rock cavern • Technical and operational feasibility • September 2008 – June 2009
SINTEF – Tritech - Multiconsult
Awarded best strategic planning project 2009
URC- Underground Rock Cavern Usage Feasibility Study, Singapore
Total Vol. : 7,844,690 m3
Cavern Vol. : 5,937,500 m3 (76%)Shaft +Tunnel Vol. : 1,907,190 m3 (24%)
Production Capacity: 800,000 m3 per dayNEWater Plant at 556,000 m3 per day
Underground science city
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MULTI-PURPOSE FLOATINGSTRUCTURES
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Collaborative R&D project to investigate use of sea area• JTC (Jurong Town Corporation)• NUS (National Universty of Singapore)• SINTEF• NTNU (advisory role)• National Research Foundation Singapore
Four main tracks• Floating hydrocarbon storage• Floating bridges | coastal structures• Floating modular multi-purpose structures• Design guidance
Multi-purpose Floating Structures
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Multi-purpose Floating Structures
Phase A: Concept Study A1 Concept evaluation and development A2 Foundation and Mooring systemsA3 Structural SolutionsA4 Materials selection, development
and testingA5 Construction, installation
and marine operationsA6 Model testing and concept qualification
Phase B: Development and verificationB1 Structural design
for prototypingB2 Concept verification and prototyping
(test-bedding in real environment)
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Modular multi-purpose floating structures
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Design issues
• Modular, inter-connected structure• Articulated, w/rigid and flexible joints• Long service lifetime• High tidal variations• Moderate waves
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• Large structure compared to wave length• Non-uniform bathymetry• Non-uniform environmental
actions across the structure• Possible hydro-elastic effects
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Norwegian R&D project on design and verification of large floating coastal structures
• Recommendations to design guidelines
• Methods and numerical tools
• Hydro-elastic effects• In-homogeneous environmental conditions • In-homogeneous bathymetry
Large Floating Coastal Structures
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Large Floating Coastal Structures
Rational description model of inhomogeneous environmental conditions
Rational evaluation models of wave/wind/current loads under inhomogeneous environments
Improved methods for hydro-elastic response, applicable to combined rigid, elastic and/or articulated structures.
Improved methods for mooring and position
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Large Floating Coastal Structures
Review phaseMap and evaluate technology gaps
Planning phaseDefining and targeting R&D activities
Development phaseDevelopment of numerical models and toolsCase studiesSensitivity studies
Verification phaseHigh-fidelity model tests
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Model tests in SINTEF's Ocean Basin
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Model tests in SINTEF's Ocean Basin
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