成果報告書詳細
管理番号20120000000896
タイトル*平成23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2012/8/9
報告書年度2011 - 2011
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
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
振動水柱型空気タービン方式発電( Oscillating Water Column System for Wave Power Conversion)において、従来に比べて効率を向上させるために、多重共振振動水柱型空気タービン方式発電(Multiple Resonance Oscillating Water Column System for Wave Power Conversion)を採用し、そのプロセスの机上検討、変換効率の確認試験、及び実証試験時の安全性(安定性)の検証試験を実施した。
英文要約Demonstration research on Power Generation System using Ocean Energy --- Wave Power Generation System with Oscillating Water Column (OWC) ---
(FY2011-FY2012)
FY2011 Annual Report
Summary:
This research started in FY 2011 under the financial support from NEDO, and was conducted by a research consortium, which is composed of six companies/institutions. Those are Mitsubishi Heavy Industry Bridge and Steel Structures Engineering Company Ltd (MBE), Toa Corporation, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Port and Airport Research Institute (PARI), Saga University and Nihon University.
Recently, various technologies are developed in the field of the Ocean Renewable Energy System. Among them, wave energy utilization is one of the most poplar systems. Oscillating Wave Column (OWC) has been developed as a typical energy extraction system. The OWC system usually has an air-chamber. Wave energy is once converted into air flow, and then this air flow turns turbine to generate electric power. After the recent development and research accumulation on OWC, it seems almost the time for us to go out to the actual field for the practical application. Field demonstration needs to conduct for the commercial viability.
NEDO set two targets on the study projects, one is about cost and another system reliability. We have to show it feasible to attain power generation with unit price of 40yen per kWh. We are also expected to conduct a field experiment to provide practical proof that the generation system is sustainable and socially acceptable.
In order to attain the targets, we first analyzed cost structure. Then, we started asking
a).how we can improve energy extraction efficiency from incident waves, and
b). how we can cut down total expenses with marinating the structural stability.
For energy extraction, hydraulic experiments and aerodynamic researches were conducted. A new design-concept of Multiple Resonance OWC system was examined applying projecting walls at each side of the water area in front of the opening. This system was found effective to reduce/remediate heavy frequency-dependency of the efficiency after hydraulic experiments. Impulse-type turbine was analyzed from aerodynamics point of view and tried to adopt for the reciprocating air current to smooth power generation. For cost cutting, a unit-type fabrication system of the generation facility was noticed. Supposing a demonstration site and its wave climate, we conducted hydraulic flume experiments for the structural stability of the facility.
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