CompositesWorld

NOV 2018

CompositesWorld

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7 CompositesWorld.com Bottom-fixed foundations are simply not feasible in these areas. Floating wind has moved beyond niche status and initial pilot and demonstration projects in Norway, Portugal, Scotland and Japan. Floating offshore wind substructures are defined by their type of stabilization. A buoyancy-stabilized floating wind turbine platform consists of a barge base with catenary mooring lines. Examples of this include Principle Power's semisubmers- ible substructure, Ideol's floater and Japanese semisubmersibles from Mitsui and Mitsubishi, deployed off the Fukushima coast. Statoil's Hywind floating wind turbine uses a ballast-stabilized spar buoy with catenary mooring and drag-embedded anchors. e third type is the tension leg platform (TLP), well known from the oil and gas industry. e platform is stabilized by the forces from tensioned mooring lines and buoyancy in the platform. What all three technologies have in common is the need for mooring systems: the other major opportunity for composites and advanced material suppliers. e most common approach is to use large chains for mooring these types of substructures. However, there is currently only a handful of companies worldwide that can manu- facture such large chains. Floating substructure technology providers have therefore identified the availability of mooring chains as a major supply chain bottleneck. As a result, some of the next demonstrator units will experiment with synthetic fiber mooring lines, in addition to chains, to compare and verify the impact from tension, corrosion, snap loads and wear. Developers and suppliers of synthetic fiber lines, and comparable technologies, have a long-term market opportunity if they engage with floating wind technology developers now. While it will be another 5-7 years until we see a large-scale floating wind farm of 50-plus turbines, the technology is likely to go mainstream. Floating substructures offer better economies of scale, as only one substructure design is required for a wind farm project; wind farms that use bottom-fixed foundations require multiple foundation designs to accommodate the seafloor variations within a project zone. ese variations are handled by adjusting the mooring line lengths of floating wind turbines. Offshore Wind Annette Bossler is owner and managing director of Main(e) International Consulting LLC, a firm specializing in international marketing and business development, based in Maine, US. She is a market expert on deepwater offshore wind and the author of numerous market reports on floating offshore wind substructures in Europe, the US and Japan. More projects, more composite components With more and more offshore wind projects around the world, the demand grows for other related components such as those for crew transfer vessels, like this one used to service the Fukushima Forward floating offshore wind project in Japan. Source | Annette Bossler Can Your Strain Gage or Thermocouple Do This? lunainc.com/odisi • Millimeter Resolution • Validate Models • Create Smart Parts • Measure & Characterize: • Complex Structures • Interlaminar Stress • Multi-Material Joining Advanced Measurements for Advanced Materials High-Definition Fiber Optic Strain and Temperature Sensing

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