Experimental Study on the Performance of a Savonius-Darrius Counter-Rotating Vertical Axis Wind Turbine

International Conference on Sustainable Energy and Green Technology 2018

能源学;生态环境科学

Didane, D.H.^1 ; Maksud, S.M.^2 ; Zulkafli, M.F.^2 ; Rosly, N.^2 ; Shamsudin, S.S.^2 ; Khalid, A.^3

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

86400, Malaysia^1

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

86400, Malaysia^2

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

84600, Malaysia^3

关键词: Average efficiencies;    Centrifugal blower;    Counter rotating;    Counter-rotating technique;    Extraction capability;    Individual performance;    Maximum Efficiency;    Vertical axis wind turbines;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/268/1/012060/pdf
DOI  :  10.1088/1755-1315/268/1/012060

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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 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 decreases 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% more efficiency in terms of torque.