Volume 44, Issue 12 pp. 9309-9316
SPECIAL ISSUE RESEARCH ARTICLE

Performance investigation of a small Savonius-Darrius counter-rotating vertical-axis wind turbine

Djamal Hissein Didane

Corresponding Author

Djamal Hissein Didane

Department of Thermofluid Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor, 86400 Malaysia

Correspondence

Djamal Hissein Didane, Department of Thermofluid Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor 86400, Malaysia.

Email: [email protected]

Search for more papers by this author
Siti Masyafikah Maksud

Siti Masyafikah Maksud

Department of Aeronautical Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor, 86400 Malaysia

Search for more papers by this author
Mohd Fadhli Zulkafli

Mohd Fadhli Zulkafli

Department of Aeronautical Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor, 86400 Malaysia

Search for more papers by this author
Nurhayati Rosly

Nurhayati Rosly

Department of Aeronautical Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor, 86400 Malaysia

Search for more papers by this author
Syariful Syafiq Shamsudin

Syariful Syafiq Shamsudin

Department of Aeronautical Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Parit Raja, Johor, 86400 Malaysia

Search for more papers by this author
Amir Khalid

Amir Khalid

Department of Mechanical Engineering Technology, Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, EDU Hab Pagoh, Parit Raja, Johor, 84600 Malaysia

Search for more papers by this author
First published: 09 September 2019
Citations: 15

Summary

This paper describes the study of a small vertical-axis wind turbine (VAWT) with a combined design of Darrius and Savonius counter-rotating rotors. The main purpose of this study is to improve the extraction capabilities of a single-rotor VAWT by using two distinct rotor designs while adopting the counter-rotating technique. Given that the conversion capabilities and operational speed of the existing wind turbines are still limited, the current technique is used to enhance the efficiency and expand the operating wind speed range of the VAWT. The Darrius and Savonius counter-rotating rotors were exposed to a similar upstream wind speed using a centrifugal blower. It was found that the Savonius-Darrius counter-rotating rotor was able to operate effectively, particularly at the low-speed wind. By looking at the individual performance of the rotors, it was observed that the conversion efficiency of the H-type rotor increases as the wind speed increases. However, in the case of the S-type rotor, it is higher at lower wind speed and tends to decrease as the operating speed increases. Thus, the maximum efficiency of the S-type rotor was achieved at low speed, whereas the H-type rotor has achieved its maximum efficiency at the highest operating wind speed. The average efficiency of the present Savonius-Darrius counter-rotating rotor has been improved to reach almost 42% and 30% more efficiency in terms of torque and power, respectively.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.