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研究生: 莊紫晴
Chuang, Tzu-Ching
論文名稱: 浮體式平台與錨鍊系統之實驗研究
Experiment Study of the Motion of the Floating Offshore Turbine
指導教授: 陳陽益
Chen, Yang-YI
共同指導教授: 楊瑞源
Yang, Ray-Yeng
學位類別: 碩士
Master
系所名稱: 工學院 - 水利及海洋工程學系
Department of Hydraulic & Ocean Engineering
論文出版年: 2016
畢業學年度: 104
語文別: 中文
論文頁數: 58
中文關鍵詞: 離岸風能半潛式浮動式平台模型試驗
外文關鍵詞: floating platform, wind energy, mooring, semisubmersible
相關次數: 點閱:112下載:41
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  • 近年來,隨著綠色能源需求日益增大,風力發電從陸上發展到離岸,再
    由淺水往深水發展,故深水區的風力發電是目前的發展重點。深水區適合使
    用浮體式基座來乘載風機,若是使用固定式基座,其成本會隨著水深而驟
    增,因此浮體式基座是一個較具經濟效益的選擇。本論文的研究重點在於浮
    體式基座與錨鍊系統的運動研究,藉由實驗來分析其運動情況,並且自製了
    一條防水LED 錨鍊系統,加上水下攝影與影像分析技術,即可得到錨鍊系統
    在水下運動的時序列情況。
    本文之實驗模型為半潛式浮體平台並符合福祿數1:50 之縮尺,風機模型
    則是參考NREL 5MW,計算其受風情況下之推力,並縮尺成等效圓盤作為模
    擬風推力,而實驗是於成大水工試驗所之風波流水槽完成。在實驗中,共有
    四種不同的錨鍊條件—無錨鍊系統、鎖鏈式錨鍊系統、彈簧式T2 錨鍊系統以
    及彈簧式T3 錨鍊系統,而實驗的內容包含自由衰減試驗、規則波作用下之運
    動反應、風波作用下運動反應,以及判斷是否有瞬荷載的發生。

    This research focuses on the motion of a floating wind turbine with a mooring system in the deep water. Experiment tests in a water flume were conducted at National Cheng Kung University, Tainan Hydraulics Laboratory (THL). The model is a 1:50 scaled semi-submersible platform and the turbine is scaled down from the NREL 5MW. There are four types of mooring system were simulated— No mooring, Chain’s mooring, Spring tension with a pretention T2, and Spring tension with a pretension T3. A waterproof LEDs were mounted on the mooring line, which allows us to catch the time-series motion of mooring line during the experiment. Various frequencies of periodic waves with the same wave height of 5 cm were generated to test the seakeeping. The measured parameters include three degree of freedom motion of the platform, natural period, and tension force at the fairlead. Three tests were designed to isolate the effect of wave and wind, which are— Free decay, pure regular wave, and combined regular wave and wind. The data of the test can offer boundary conditions for the numerical model verification.

    圖目錄 .............. III 表目錄 ............. VII 第一章 緒論 ............ 1 1.1 研究動機 ............ 1 1.2 文獻回顧 ............ 1 1.2.1 離岸式風力發電發展現況與趨勢 ....... 1 1.2.2 台灣發展近況及優勢 ......... 3 1.2.3 縮尺模型實驗 ........... 4 1.2.4 數值模擬實驗 ......... 6 1.2.5 錨鍊系統 .......... 7 1.3 本文架構及目標 .......... 8 第二章 研究方法 ............ 10 2.1 實驗與儀器設備 .......... 10 2.2 參數測量............ 16 2.2.1 自由衰減量測 ......... 16 2.2.2 RAO 量測 .......... 17 2.2.3 錨鍊系統張力值 ......... 17 2.2.4 塔柱上與水下 LED 追蹤系統 ...... 18 第三章 實驗條件率定與模型介紹 ......... 19 3.1 模型介紹與縮尺 .......... 19 II 3.2 錨鍊系統之縮尺 .......... 23 3.3 實驗條件及配置圖 .......... 23 3.4 實驗流程............ 27 第四章 實驗結果 ............ 30 4.1 自由運動衰減試驗 .......... 30 4.1.2 自由衰減試驗結果 ......... 33 4.2 規則波作用下之平台運動反應 ....... 35 4.2.1 純波作用下之平台運動反應 ...... 35 4.2.2 風波交互作用下之運動反應 ...... 38 4.2.3 純波與風波作用下 RAO 之比較 ...... 40 4.3 張力值與浮體平台關係之探討 ....... 43 4.3.1 張力平均值與 Ka 值之關係 ........ 44 4.3.2 張力平均值與飄移量之關係 ...... 45 4-4 水下錨鍊追蹤系統與成果 ........ 46 4-5 瞬荷載 (Snap Load) .......... 47 第五章 結論與建議 ........... 49 5.1 結論 ............. 49 5.2 未來展望與建議 .......... 50 參考文獻 .............. 51 附錄 .............. 53

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