Mintra Trongtorkarn1, Thanansak Theppaya2, Montri Luengchavanon This email address is being protected from spambots. You need JavaScript enabled to view it.3,4, and Shahariar Chowdhry3

1Energy Technology Program, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
2Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, 90110, Thailand
3Wind Energy and Energy Storage Systems Centre (WEESYC), Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
4Centre of Excellence in Materials Engineering (CEME), Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand


Received: November 20, 2021
Accepted: February 21, 2022
Publication Date: April 29, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Renewable energy sources are critical to reduce the use of fossil fuels that cause atmospheric Carbon dioxide (CO2) emissions. Wind power can be used to generate electricity as a green energy source. Horizontal Axis Wind turbine (HAWTs) installed in large power plants are complex and costly. Small scale low wind speed turbines can be used in the office, home or farm as a new idea to implement wind energy applications. Vertical Axis Wind turbine (VAWTs) and Permanent Magnet Synchronous Generator (PMSGs) can be used on a small scale to resolve starting torque limitations using the skewing magnet technique. VAWT blades were combined with Savonius and Darrieus rotors. Skewing magnets at 0-20 degrees reduced starting torque by 34.66%, temperature in the coils 7-8%, and electrical power 18.18%. The VAWT system cut-in at a wind speed of 1.75 m/s when operated in a wind tunnel with 1-8 m/s wind speed. A VAWT system was successfully developed for a low wind speed turbine.

Keywords: Wind tunnel, Starting torque, PMSG, Temperature, VAWTs, Low speed wind


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