成果報告書詳細
管理番号20110000000992
タイトル*平成22年度中間年報 新エネルギー技術研究開発 次世代風力発電技術研究開発 基礎・応用技術研究開発
公開日2011/10/12
報告書年度2010 - 2010
委託先名独立行政法人産業技術総合研究所
プロジェクト番号P07015
部署名新エネルギー部
和文要約・複雑地形の数値流体力学(CFD)シミュレーション及び風洞実験技術の高度化では、風特性のCFDシミュレーションを実施し、風洞実験及び実計測データとの比較において地形データの解像度に大きく依存しない等の知見を得た。また、複雑地形におけるウインドファーム後流モデルの開発・評価のため、風洞実験によりアクティブ乱流格子の有効性を検証した。
・取得した複雑地形の風データを解析し、CFDシミュレーション、風洞実験の検証用比較データを作成した。風速計の違いによる乱流強度への影響については、標準乱流モデル(NTM)を評価する上では影響が小さいことを確認した。また、空力荷重解析により実際の風車設計に与える影響を評価し、改訂したNNTMを再評価した。これらにより、IEC国際標準へ提案する複雑地形・台風要因風特性モデル案を策定した。。
・IEA風力国内委員会において、IEA Windの各種Taskミーティングの途中経過を報告した。また、小形風車ラベリングに係るTaskでは、データ提供等積極的に参加した。
・風速のリモートセンシング機器であるLIDAR(Laser Imaging Detection and Rangingの略。)及びSODAR(SOnic Detection And Rangingの略。)を複雑地形に設置し、従来の風速計測手法(風計測マスト+カップ式風速計)と同時計測を実施しすることで、精度・信頼性の評価を行った。また、CFDシミュレーション技術を援用し、複雑地形におけるリモートセンシング技術の誤差要因を解明した。
・小形風車の設計要件及び性能評価手法の確立に向け、建物屋上及び複雑地形における風条件を想定した予備的なCFDシミュレーションを実施し、課題を抽出した。
英文要約Title: New Energy Technology Research and Development / Research and Development of Next-Generation Wind Power Generation Technology / Research and Development of Basic and Applied Technologies (FY2008-2012) FY2010 Annual Report
The height of the meteorological mast in Otsuki was increased and the highly reliable cup anemometers were installed more on the meteorological mast in Ichikikushikino to clarify the detailed wind characteristics over complex terrain. Wind tunnel experiments and CFD (Computational Fluid Dynamics) simulations of wind characteristics over complex terrain were conducted with variable resolutions of digital topographical maps, various sizes of computational domain and various inflow boundary conditions. An active turbulence generators for wind tunnel experiments was developed in order to evaluate wake effects and wind farm turbulence in complex terrain, and it was found that turbulence generated by the active turbulence generator was effectively convected in test section keeping its intensity. The dependency of turbulence intensities on various indices of terrain complexity were evaluated and Normal Turbulence Model (NTMs) developed in the last fiscal year and other wind conditions for wind turbine design were reassessed by load calculations for an imaginary 5MW wind turbine. The draft of the new wind condition models and parameters for wind turbine design were drawn up in cooperation with other NEDO projects.
A LIDAR and a SODAR were installed near coastline in Kamisu and the reliability of them at the sites with flat terrain was examined by comparison with wind speed data measured simultaneously by cup anemometers mounted on a meteorological mast. The LIDAR and the SODAR were transferred to the measurement site in Otsuki, and the reliability evaluation of remote sensing techniques was started in the sites with complex terrain. Error factors of remote sensing techniques were investigated numerically, and it was found that the small errors in the vertical component of wind vectors cause significant amount of errors in horizontal component of wind vectors.
The Committee was continuously established in order to involve not only the contractors of this project but also many other stakeholders for the discussion of strategic activities in IEA Wind implementing agreement and for drawing up proposals to IEC TC88 based on the outcome of this project.
Feasibility study on test methods and design requirements for small wind turbine was carried out to clarify problems to be solved for safety and reliability of small wind turbines installed in sites with complex terrain and on the rooftop of buildings and for vertical axis small wind turbines. The details of demonstration tests for the verification of the various tests methods for small wind turbines in accordance with the current IEC standards or the domestic standards adapted in certification/labeling systems in other countries were specified for the next fiscal year’s demonstration test. Wind conditions, acoustic noise conditions and other external conditions were evaluated at the promising test sites and a few sites were selected for tests of small wind turbines. A committee for establishment of certification/labeling system for small wind turbines was organized and certification/labeling systems in other countries were surveyed in order to draw up standards for test methods and criteria of certification/labeling.
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