成果報告書詳細
管理番号20120000000635
タイトル*平成23年度中間報告 風力等自然エネルギー技術研究開発 海洋エネルギー技術研究開発 海洋エネルギー発電システム実証研究(着定式潮流発電)
公開日2012/6/29
報告書年度2011 - 2011
委託先名川崎重工業株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:
1. 共同研究の内容及び成果等
1)想定海域における自然条件と社会条件の調査
1 実証候補地の選定調査 (担当:沖縄新エネ開発株式会社)
沖縄海域における実証候補地の選定について、再委託先である沖縄新エネ開発株式会社により、以下の調査を行った。
英文要約Title:R&D on natural energy technologies such as wind power/R&D on ocean energy technologies /verification studies on ocean energy power generation systems (foundation type Tidal Turbine Generator-TTG) (FY2011-2012) FY2011 Annual Report
In order to select a candidate site for demonstrating tidal current turbine generating systems in the Okinawa waters, data and information on regulatory and social conditions have been collected and candidate sites for verification tests have been narrowed down to 2 locations. During winter, detailed measurement surveys were conducted on the 2 sites covering each survey item for the tidal current, the ocean waves and the bottom sediment, the results of which were combined with the survey results on the grid and the generating capacity that can be arrayed at the proposed measurement survey waters sites to further narrow down the demonstration sits to 1 location.
For the purpose of estimating the cost on a commercial scale, a conceptual design of TTG has been completed. Specifically, determination of the basic specifications, study on base weight reduction methods for the gravity system, as one of the installation types, and a conceptual study on the equipment work have been implemented. As maintainability is essential to the seabed foundation TTG, the method of detaching the nacelle alone from the base structure, floating it on the water and then transferring it to the shore has been chosen.
For maintenance mechanism, the basic characteristics could be defined by implementing verification tests on the nacelle hoisting behavior as well as the nacelle towing tests, etc. using a reduced model in the water tank. Using the same reduced model in the atmosphere, another test on the mating section of the nacelle was conducted to define the allowable range of the mating section in actual subsea operation for fixing the nacelle to the seabed base.
Regarding the design of blades for TTG, the blade configuration was designed considering the hydrodynamic design factors/structural strength and its hydrodynamic performance has been evaluated through CFD analysis. Also, as part of the tests using the reduced model in the water tank, the blade performance test for TTG application was conducted and it was verified that the results basically conform to the designed performance.
Regarding the design of the TTG (drive train) used for the tidal current turbine generation, appropriate equipment has been selected (step-up gear, generator, etc.) in consideration of the pre-setup rated operating conditions, overload, over speed conditions, etc. The layout of respective equipment within the nacelle has been determined in consideration of ease of assembly and maintenance of the nacelle.
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