Design and Development of a Gowind Composite VAWT System

• Main Authors: CHIN, YANG-CHIH, 秦揚智
• Other Authors: 張瑞榮
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/54519162917986496925

碩士 === 中華科技大學 === 機電光工程研究所碩士班 === 105 === This thesis presents design and development of a Gowind composite vertical axis wind turbine system. Primary target is to apply mobile impeller to substitute traditional one-way impeller. Blade can be applied efficiently on wind power and driver of wind direction after blown by wind. With this improved design, resistance generated by traditional impeller during operation can be reduced. By doing this, the mold shall be manufactured by 3D printing technique in the first place. After that, constant of structural condition and operability can be vertically integrated. Then, studying approach and procedure are able to be investigated for composite airfoil blade structure with double-sided type. The purpose of this method is to analysis pushing lift force of lift and resistance force type. Also, effect of efficiency for generator of wind turbine between these two structures will be studied based on single wind blade under various directions of blade surfaces. In the theory analysis and experimental measurement, finite analysis program ANASYS can be applied to analyze static reinforced structure. Also, bending failure testing for blade will be combined. Meanwhile, approach of displacement control will be implemented to acquire relation curve between loading and displacement of blade. As for structural strength of blade, spectrum percussion test which specified as non-destructive inspection will be applied. Also, modal analysis of ANASYS and identification of optimum elastic constants for composite material will be employed to find out natural frequency of blade and three optimum elastic constant parameters. However, test result shows that value between experiment and theory is really close. At the same time, blade element momentum method (BEM) shall be applied, and blade will be divided into multiple 2D sectional curvatures with coefficient of relatively resistance. In the end, tangential force of 3D blade, torque and overall mechanical energy performance can be all calculated for composite blade. In order to provide assurance on system structure of wind turbine generator applied for city and structure of tall building in the future, composite blade structure with double sided wing type implemented for system of generator shall be testified for safety and integrity. Keywords: Composite vertical axis wind turbine; Mobile impeller; 3D printing technique; Composite airfoil blade structure; Double-sided type; Lift and resistance force type; Blade element momentum method