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Energies 2014, 7(11), 7773-7793; doi:10.3390/en7117773

System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

1
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan
2
Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101, Taiwan
3
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
4
Centre for Energy Sciences, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
*
Author to whom correspondence should be addressed.
Received: 5 August 2014 / Revised: 30 October 2014 / Accepted: 14 November 2014 / Published: 21 November 2014
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Abstract

In designing a horizontal-axis wind turbine (HAWT) blade, system integration between the blade design and the performance test of the generator is important. This study shows the aerodynamic design of a HAWT blade operating with an axial-flux permanent magnet (AFPM) generator. An experimental platform was built to measure the performance curves of the AFPM generator for the purpose of designing the turbine blade. An in-house simulation code was developed based on the blade element momentum (BEM) theory and was used to lay out the geometric shape of the turbine blade, including the pitch angle and chord length at each section. This simulation code was combined with the two-dimensional (2D) airfoil data for predicting the aerodynamic performance of the designed blades. In addition, wind tunnel experiments were performed to verify the simulation results for the various operating conditions. By varying the rotational speeds at four wind speeds, the experimental and simulation results for the mechanical torques and powers presented good agreement. The mechanical power of the system, which maximizes at the best operating region, provided significant information for designing the HAWT blade. View Full-Text
Keywords: wind turbine; horizontal-axis wind turbine (HAWT); axial-flux permanent magnet (AFPM) generator; blade element momentum (BEM) theory; airfoil; wind tunnel experiment wind turbine; horizontal-axis wind turbine (HAWT); axial-flux permanent magnet (AFPM) generator; blade element momentum (BEM) theory; airfoil; wind tunnel experiment
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bai, C.-J.; Wang, W.-C.; Chen, P.-W.; Chong, W.-T. System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator. Energies 2014, 7, 7773-7793.

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