本文針對一新型多葉片垂直軸風力機進行理論效率推導與性能實驗之整合研究；首先藉由風車葉片之阻力分析推導而得到其數學模型，由此暸解本風車之理想的氣動性能，包括功率以及力矩特性。接著於高樓樓頂設計並建置一可拆式垂直軸風車開放實驗平台；實驗平台之資料擷取系統係利用National Instruments公司的資料擷取卡，將高樓平台的各種感測器與風力發電機之發電參數等類比訊號，轉成數位訊號傳送至電腦。並以圖形化程式語言LabVIEW撰寫一套能即時監測風場環境之自動化程式，能紀錄風力發電機所有之輸入與輸出實驗數據，並依風速分類存檔紀錄之；接著將測試資料藉撰寫完成之程式做資料處理與分析，並且以統計的概念驗證資料是否充足，以期獲得較為可信的實驗數據供分析與評估。
在完成建立風車之數學模型與測試平台後，於其上架設新型多葉片垂直軸風車進行實際測試實驗，以瞭解實際發電效率和理論的落差；並利用所推導出的風車數學模型做為實驗結果的對照組，發現實驗的趨勢皆符合物理現象，進而驗證了此測試平台系統的可信度。為進一步提昇風車之性能，規劃了風車的半徑與葉片數2個參數以探討其對風車之性能影響，在彙整各組實驗之量測結果分析可知，增加風車半徑能提高周速比、風能轉換效率、轉矩與輸出功率；而增加葉片數則能有效利用掃風面積以提昇功率係數，同時也有助於提升啟動性。综合來說本研究藉由增加風車之葉片數成功地將原型風車的氣動性能大幅提昇；在所取得的測試資料中，半徑1公尺之改良型風車的最高功率係數為5.5%，較半徑1公尺之原型風車的3.5%提昇了1.57倍。同時其最大輸出功率也有所提昇；在10米風時，從90瓦提高至150瓦，而當其半徑增大至1.5公尺後，輸出功率更達290瓦且最高功率係數進而提昇至7%，所對應之周速比也由0.3增加至0.36，顯示風車的整體氣動性能皆得到了提昇。

This analytic and experimental investigation is aimed to enhance the performance of an innovative small vertical axis wind turbine (VAWT). At first, a flexible experimental platform is designed and installed on a building rooftop for executing the performance evaluation of VAWT. By utilizing the data acquisition system (DAQ), environmental information and power data on the platform are recorded and transferred to the computer automatically. With the aids of a visual software programming within the framework of Labview, the real-time monitoring on the input/output parameters of generator and the wind condition on the rooftop can be carried out simultaneously. Afterwards, the data processing and in-depth analysis on the experimental outcomes are performed via the established computer program together with the statistic concept. Consequently, the actual performance of the wind turbine generator system is attained easily in an automatic and systematic manner.
Furthermore, an innovative multi-blade vertical axis wind turbine is constructed and installed for performance evaluation on this platform. The performance outcomes of original VAWT design indicate a consistent correlation with the physical interpretation and thus verify the reliability of this VAWT test system. Moreover, to enhance its performance, blade radius and number of this VAWT are varied for understanding their influence on turbine performance. Consequently, a bigger radius results in significant enlargements on TSR, torque and power coefficients, and total power output. Besides, an increasing blade number not only improves its aerodynamic characteristics, but also generates more torque for attaining better start-up ability under the low wind speed. In summary, the maximum power coefficient and power output are improved from 3.5% to 5.5% and 90W to 150W at wind speed of 10 m/sec for the case of 1m-radius VAWT, respectively. Also, the maximum power coefficient and power generation can be further upgraded to 7% and 290W at wind speed of 10m/sec for a 1.5m-radisu modified VAWT.

[1]“Climate Change Performance Index 2010,” Germanwatch, 2009.
[2]世界風能組織，http://www.wwindea.org/。
[3]經濟部能源局，http://www.moeaboe.gov.tw/。
[4]“挑戰2008：國家發展重點計畫”，行政院經濟建設委員會，2000年11月。
[5]98年全國能源會議，http://www.moeaboe.gov.tw/Policy/98Energy Meeting/MeetingMain.aspx?pageid=reason。
[6]“2010年能源產業技術白皮書”，經濟部能源局，2010年4月。
[7]美國風能協會，http://www.awea.org/。
[8]台灣電力公司 “台電新增電源計畫”，http://www.taipower.com.tw/
[9]Sandia National Laboratories Staff, “Vertical Axis Wind Turbines - The History of the DOE Program.”
[10]Blackwell, B. F., Sullivan, W. N., Reuter, R. C. and Banas, J. F. Engineering Development Status of the Darrieus Wind Turbine,” J. ENERGY, Vol. 1, No. 1, pp, 50-64, Jan. 1977.
[11]Sheldahl, R. E. and Bleckwell, B. F., “Free-Air Performance Test of a 5-Meter-Diameter Darrieus Turbine,” SAND77-1063, 1977.
[12]Blackwell, B. F. and Sheldahl, R. E., ”Selected Wind Tunnel Test Result for the Darrieus Wind Turbine,” J. ENERGY, Vol. 1, No. 6, Nov. - Dec. pp. 382-386, 1977.
[13]Sheldahl, R. E. and Blackwell, B. F., Wind Tunnel Performance Data for the Darrieus Wind Turbine with NACA0012 Blades, SAND76-0130, 1977.
[14]Fujisawa, N., “On the Torque Mechanism of Savonius Rotors,” Wind Eng. Ind. Aerod., Vol. 40, No. 2, pp. 77–92, 1992.
[15]楊淳宇，“大尺度渦漩模擬在垂直軸風力發電機之應用”，臺灣科技大學機械工程研究所碩士論文，2007年。
[16]黃鴻鈞，”旋轉中的垂直軸風力發電機葉片性能之數值分析”，臺灣科技大學機械工程研究所碩士論文，2008年。
[17]Mertens, Sander, “Wind Energy in Urban Areas: Concentrator Effects for Wind Turbines Close to Buildings,“ Refocus, Volume 3, Issue 2, pp. 22-24, 2002.
[18]Mertens, Sander, “The Energy Yield of Roof Mounted Wind Turbines,“ Journal of Wind Engineering, Vol. 27, No. 6, pp. 507-517, 2003.
[19]Celik, A. N. “Energy Output Estimation for Small-Scale Wind Power Generators Using Weibull-Representive Wind Data,” Journal of Wind Engineering and Industrial Aerodynamics, Vol. 91, pp. 693-707, 2003.
[20]van Bussel, G. J. W., Mertens, S., Polinder, H., and Sidler, H. F. A., “TURBY: Concept and Realization of a Small VAWT for the Built Environment," Proceeding of EAWE/EWEA conference 2004, Delft, Netherlands, April 19-21, 2004.
[21]周辰穎，”陣風效應對風力發電之影響”，國立中央大學土木工程系研究所碩士論文，2005年。
[22]Rogers, A. L. and Manwell, J. F., “Wind Turbine Acoustic Noise,” A White Paper, Renewable Energy Research Laboratory, Department of Mechanical and Industrial Engineering University of Massachusetts at Amherst , pp. 8-12, 2006.
[23]Dayan, E., “Wind Energy in Building,” ReFOCUS, pp. 35-38, March/April 2006.
[24]Grant, A., Johnstone, C., and Kelly, N., “Urban Wind Energy Conversion: the Potential of Ducted Turbines,” Renewable Energy, Vol. 33, pp. 1157-1163, 2008.
[25]Mithraratne, N., ”Roof-Top Wind Turbines for Microgeneration in Urban Houses in New Zealand,” Energy and Buildings, Vol. 41, pp. 1013-1018, 2009.
[26]王世宇，“風力發電機於大樓屋頂之流場分析”，台灣科技大學機械工程研究所碩士論文，2010年。
[27]David, R. and Gerald, M., “Wind Energy System” Proceedings of the IEEE, Vol. 81, No. 3, pp. 378-389, March 1993.
[28]中央氣象局網站，http://www.cwb.gov.tw/。
[29]英國Garrad Hassan公司，http://gl-garradhassan.com。
[30]朱佳仁，“風工程概論”，科技圖書，2006年。
[31]牛山泉，“風能技術”，科學出版社，2009年。
[32]Stevens, M. J. M and Smulders, P. T., “The Estimation of the Aramenters of the Weibull Wind Speed Distribution for Wind Energy Utilization Purposes”, Wind Engineering, Vol. 3, No. 2, pp. 132-145, 1997.
[33]工研院風能網站，http://wind.itri.org.tw/wind.html。
[34]台灣地區基本風能分佈，能資所技術報告，技資編號06390N033，1991年12月。
[35]“中華民國95年台灣能源統計手冊”，經濟部能源局，2007年7月。
[36]新坡國小網站，http://library.taiwanschoolnet.org/。
[37]美國Green Energy systems公司，http://greenenergysystemsinc.com /wind-energy-technologies.php。
[38]http://b2museum.cdstm.cn/ancmach/machine/ja_14.html
[39]http://www.solar-i.com/wh2.htm
[40]http://en.wikipedia.org/wiki/Charles_F._Brush
[41]歐州風能協會，http://www.ewea.org/。
[42]加拿大梅根動力公司，http://www.magenn.com/。
[43]美國風能協會，http://www.awea.org/。
[44]英國quietrevolution公司，http://www.quietrevolution.co.uk/。
[45]荷蘭turby公司，http://www.turby.nl/。
[46]日本loopwing株式会社，http://www.loopwing.co.jp/index.html。
[47]瑞典homeenergy公司，http://www.homeenergy.se/vindkraft.aspx。
[48]美國Bluenergy公司，http://www.bluenergyusa.com/。
[49]Paraschivoiu, Ion, “Wind Turbine Design, with Emphasis on Darrieus Concept”, Ecole Polytechnique de Motreal, 2002.
[50]Wolff, Ben and Hans, Meyer, Wind Energy, The Franklin Institute Presss, 1978.
[51]Hau, E., “Wind Turbines Fundamentals, Technologies, Application, Economics,” Springer, 2000.
[52]Lysen, E., “Introduction to Wind Energy,” CWD, (formerly SWD), PO Box 85, Amersfoort, The Netherlands, 1983.
[53]Hoerner, S. F., “Fluid-Dynamic Drag,” Hoerner Fluid Dynamics, Brick Town, NJ, pp. 7-2, 1965.
[54]IEC Wind turbine standards, IEC 1400-1-D, Dec. 1993.
[55]http://zh.wikipedia.org/zh-hk/File:Normal_distribution_and_scales.gif