Performance Enhancement of an Innovative Vertical-Axis Wind Turbine
| Autor: | Tai-Hsin Kuo, 郭岱鑫 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 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. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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