成果報告書詳細
管理番号20130000000382
タイトル*平成24年度中間年報 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 次世代海洋エネルギー発電技術研究開発(水中浮遊式海流発電)
公開日2013/6/15
報告書年度2012 - 2012
委託先名東京大学大学院新領域創成科学研究科 株式会社IHI 株式会社東芝 株式会社三井物産戦略研究所
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Title: Research and Technical Developments on next generation Ocean Energy Generator (Ocean Current Generator in the Sea (Subsea floating Type))

Interval Report for 2012 Fiscal Year (Out of 2011 FY - 2014 FY Program)

By: University of Tokyo, IHI Corporation, Toshiba Corporation, Mitsui Global Strategic Studies Institute

Contents and Results
(1) Development of a turbine
Modification of shape of turbine has been carried out by numerical simulation and tank test in order to improve the hydrodynamic efficiency at the velocity condition of ocean current flow. Based on the calculated pressure distributions, load on the turbine have been investigated. Characteristics of material have been also investigated under the pressurized seawater condition.
(2) Development of a floating structure and mooring system
The floating balance of the structure has been investigated considering the weight of internal components, hydrodynamic forces and buoyancy on the structure. Basic configuration of the mooring line, anchor/sinker and cable for electric transmission has been investigated with the estimation of drag and tension on this mooring system.
(3) Development of a generator and power transmission system
 A direct-drive permanent magnet generator corresponding to the low rotating speed has been studied based on electromagnetic analysis. The drive train system for low maintenance ocean current generator has been investigated.
A configuration of power transmission system for ocean current generator has been investigated in consideration of advantages and disadvantages of AC and DC transmission systems. The control method of converter/inverter systems for twin turbine generators has been also studied.
(4) Development of the simulation technology
 A short term measurement of KUROSHIO current by an electromagnetic velocity meter has been carried out. A buoy system with ADCP has been installed off Miyake Island for long term measurement. A fully coupled computer code for estimating the twin type current turbine and its mooring system has been build. A model test in a towing tank was carried out. Using the test results, we validated the computer code.
(5) Preliminary Research on Methodology for evaluation of Generator and Feasibility
 We carried out preliminary calculations for cost of energy depends on size of the rotor power and scale of the farm. The cost exercise has been extended into examining the trends of cost predicted by the industry and some specific costs of energy that could be realized as arrays in the KUROSHIO Current.
(6) Feasibility of the ocean current generator
 Principle particulars and technical challenge of elemental components for oce
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