The New Energy and Industrial Technology Development Organization (NEDO) has decided on the recipients of the call for "development of next-generation technologies that will promote the adoption of floating offshore wind power generation methods". Among the companies involved in the construction, development topics from the Obayashi Corporation, Taisei Corporation, Toda Corporation, Kumagai Gumi, and others have been selected. We will identify, organize, and verify technical issues based on the viewpoints of weather and sea conditions, water depth, and social acceptance in the seas surrounding Japan, and aim to reach a stage where floating offshore wind power can be commercialized at an internationally competitive cost. The implementation period is expected to last until fiscal 2025.
Image of TLP hybrid floating object (from press release)A
According to the announcement of Obayashi Corporation, they proposed the topic of technology development related to TLP (a method of tying floating objects to a subsea foundation using the tension anchor method). We will strive to develop a "TLP-type floating offshore wind turbine support structure", develop technology that enables mass production and reduces the cost of TLP-type floating hulls, and conduct demonstration experiments with installed wind turbines. Prepare society for the deployment of TLP-type floating offshore wind power generation from 2030 onwards.
To date, we have been working on developing comprehensive technology for offshore wind power, targeting all types of foundation structures, both grounded and floating. The company installed Japan's first tension-moored TLP-type floating hull in an actual sea area and began demonstration testing in July.
According to Tokyo Electric Power Company (HD), Hokkaido Electric Power Company, and Taisei Corporation, the three companies have proposed “development of a compact semi-submersible floating hull technology made entirely of concrete and anchored in deep waters.” Various studies and evaluations will be conducted to resolve technical issues with semi-submersible floating hulls and tote mooring systems (an anchoring system that uses synthetic fiber ropes for most of the mooring lines). We will also conduct a regional acceptance survey to verify the technology in actual waters in the future.
TEPCO HD will be responsible for developing a low-cost mooring system that can be applied in deep water, and Hokkaido Electric Power Company will be responsible for regional acceptance studies. Taisei Corporation will continue to develop technology to solve design issues and rapid mass production technology for floating concrete hulls. We will work together on this project by leveraging our respective knowledge and contribute to the realization of a carbon-neutral (CN) society.
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