成果報告書詳細
管理番号20150000000127
タイトル*平成26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 海洋エネルギー発電システム実証研究 (空気タービン式波力発電)
公開日2015/9/1
報告書年度2014 - 2014
委託先名三菱重工鉄構エンジニアリング株式会社 東亜建設工業株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Demonstration research on Power Generation System using Ocean Energy
---Wave Power Generation System with Oscillating Water Column (OWC) ---
(FY2011-FY2014)

FY2014 Annual Report

Summary:

Six private companies and research institutes & universities jointly started a consortium research for practical use of the oscillating water column system (OWC) in 2011. Hydraulic experiments with small and large scales (S:1/25 -- 1/7) were conducted to improve the primary conversion from wave to air flow. Projecting-walls (PW), installed both side of the opening, were found out to make frequency dependency reduced. At the same time, hydraulic experiment for the single OWC facility installed on the line of breakwater showed sudden drop down of the efficiency of the primary conversion against a certain wave period . This occurred due to the interposition with reflection waves from the ambient surface of breakwater.  Reduction of wave reflection improved this drop significantly.
In 2014, the consortium strengthened its design and construction power by welcoming two new members of expert. The consortium tried a new application of PW-OWC system to the existing coastal embankment in the Sakata Port. The line of this embankment shows no bad effect of reflection waves, as the embankment has a series of two air chambers in front-back direction inside to reduce wave-reflection. Its front chamber is expected to behave as PW and its back chamber as the water-air column (OWC). Numerical analysis was applied to this embankment to examine the response of the primary conversion against incident wave. Appropriate size of the turbine and generator was selected through the combined analysis with the primary and secondary conversions. An experiment facility of wave power conversion was finally installed on this embankment in December, 2014. After the official safety inspection by METI, the field experiment was started to obtain the data of waves and generated electricity since January, 2015.
The PW-OWC system installed on the existing facility is expected a possible design of the practical application
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