Production Projects
Floating Offshore Wind Turbine (FOWT)
- DOE AFLOWIR (DOE Mayflower Atlantic FOWT)
- UMaine NYSERDA NOWRDC Synthetic Mooring
- DOE ATLANTIS Scale Model Experiments for Co-Designed FOWTs Supporting a High Capacity (15-MW) Turbine
- Generation 2 Multi-turbine Semi-submersible Platform (Hexicon)
- Kincardine Project with Semi-Spar Platform, FEED and Detail Engineering (Terminated)
- Hexicon Dounrey Twin-turbine Semi-submersible Platform (Generation 1; Terminated)
- Floating Wind Concepts (Spar-type, Semi-submersible Platform-type, and TLP-type) for Offshore Korean
- Windfloat demonstration project for offshore Portugal
Ocean Stream Generator (OSG)
- Anadarko Petroleum Corporation (APC) developed the concept.
- Participated in 2009 and supported APC to complete ¼ scale model testing in 2017.
Ocean Thermal Energy Conversion (OTEC)
- Lockheed Martin started the OTEC project in 2009.
- Involved and supported LMT to wrap up the project in 2019
R&D Projects
FOWT Substructure Concepts for High-Capacity WTGs (Semi-Type & TLP-Type)
——Ultimate Goals: Low CAPEX, Low OPEX and Low Risk——–
Development Philosophies:
- Quayside integration capable (RNA/tower/hull installed at yard as an integrated platform)
- Vertically towing capable to the installation site & to a yard for major repairs if needed
- Efficient structure connection between tower base & hull structural arrangement
- Light hull steel weight
- Operability: low motion hub for WTG, moorings & power cable(s)
- Scalability: suitable for WTG from 5MW to 20MW or higher
- Adaptability: suitable for worldwide metocean criteria and water depth: ≥ 50m
- Industrialization: good constructability, transportability & installability
Hull Forms:
- Three Paired-Column Hull with three horizontal beams connecting inner columns and tower base equipped three mooring lines for Semi-Submersible option
- Three-Column Hull with Six Extended Base Structures installed 6 vertical moorings on the six said structure members for TLP option
Serial Developments of FOWTs for 5MW, 10MW and 20MW (Semi-Type)
Systematically investigating effects of:
- Various WTGs, Towers and Hub heights corresponding to 5MW, 10MW and 20MW
- Hull sizing (Semi-type) including stability with serial specified WTGs
- Mooring systems for seakeeping
- Potential benefits gained in term of reducing LCOE by adopting higher capacity WTG
- Challenges faced by implementing higher capacity WTG
Floating Substation Concepts for Small, Medium & Large Topsides Payloads (Semi-Type & TLP-Type)
Development Philosophies: focusing on entire life cycle values
- Quayside integration capable (minimizing offshore operations)
- Vertically towing capable to the installation site (avoiding horizontally towing and upending)
- Efficient connection between deck and hull
- Sufficient hull pontoon space for hosting import/export cables
- Light hull/deck steel weight
- Operability: motion and acceleration friendly for HVDC or HVAC
- Scalability: suitable for topsides payloads from 500 mt to 20,000 mt and import/export cables from 8 to 50.
- Adaptability: suitable for worldwide metocean criteria and water depth: ≥ 50m
- Industrialization: good constructability, transportability & installability
Hull Forms:
- Semi-Type: Three Paired-Column Hull and Four Paired-Column Hull
- TLP-Type: Three-Column Hull with Six Extended Base Structure Members
Critical Inputs:
- Topsides payloads
- Required deck area
- Import and export cables (counts, properties and layout)
- Constrains of motions and accelerations due to HVDC or HVAC
Categories of Topsides Payloads:
- Small topsides payloads: 500 mt to 1,500 mt
- Medium topsides payloads: 1,501 mt to 6,000 mt
- Large topsides payloads: 6,001 mt to 20,000 mt
Selection of Hull Forms:
- Small topsides payloads and few import/export cables: TLP-type or Semi-type (Three Paired-Column Hull)
- Medium topsides payloads and medium numbers of import/export cables: Semi-type (Three Paired-Column Hull or Four Paired-Column Hull)
- Large topsides payloads and large numbers of import/export cables: Semi-type (Four Paired-Column Hull)