Performance analysis of the deflector integrated cross axis wind turbine. (August 2019)

• Record Type: Journal Article
• Authors: Chong, Wen-Tong; Muzammil, Wan Khairul; Ong, Hwai-Chyuan; Sopian, Kamaruzzaman; Gwani, Mohammed; Fazlizan, Ahmad; Poh, Sin-Chew
• Is Part Of: Renewable energy. Volume 138(2019)
• Page Start: 675
• Page End: 690
• Publication Date: 2019-08
• Subjects: Wind energy -- Cross axis wind turbine -- Renewable energy -- Urban energy system -- Efficiency; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2019.02.005
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Wind turbines in the context of integration in an urban environment are considered as one of the most promising technologies for the efficient diffusion of renewable energy sources. However, situations such as low wind velocity, highly turbulent and skewed wind flow conditions are commonly encountered in this environment. This misaligned flow could affect the horizontal axis wind turbine performance. The vertical axis wind turbine (VAWT) is more suitable to operate under these unfavorable conditions. Nevertheless, the conventional VAWT has low efficiency and poor self-starting characteristics. Therefore, a novel design of deflector integrated cross axis wind turbine (CAWT) is proposed. Tests were carried out to harness wind energy from both the horizontal and vertical components of the skewed flow induced by the deflectors. A semi-empirical approach was also developed to analyse the performance of the CAWT. The aerodynamic behaviour of the CAWT was determined by combining the blade element momentum (BEM) model and double multiple streamtube theory (DMST). The approach showed notable agreement between the experimental and theoretical results (9.8%–14.2% difference). In conclusion, the findings from the experiment and the model showed that the concept has very good potential in the renewable energy industry. Manuscript Highlights: A cross axis wind turbine (CAWT) is designed and studied with a novel approach. The CAWT incorporates airfoil-shaped struts to enhance wind energy output. The CAWT extracts energy from horizontal and vertical components of skewed wind. The proposed approach accounts for the vertical and horizontal blades of the CAWT. The theoretical investigation showed good agreement with experimental data.