City Research Online

Abstract

To extract power from the wind, the high enough velocity of the wind is a key factor. However, winds with high enough velocities are not available in most areas; therefore, finding a method to enhance the velocity potential of the low-speed winds remains a serious challenge in wind engineering. In this study, a hollow duct with a specific con guration, called Multi-Stage Inducing Duct, is presented which is capable of significantly enhancing the velocity pro le of low-speed winds, enough to start most of the small horizontal wind turbines. For example, a three-stage inducing duct can increase the wind velocity from 3 m/s to 9.3 m/s on average at the rst-stage throat of the duct, which equals the increase rate of 29 times in wind potential power. This configuration of the duct was introduced and numerically simulated. Moreover, the effects of its di erent geometrical parameters were investigated. The impact of wind velocity and the number of the stages on the duct performance were investigated. Finally, a study of the relative e ectiveness of adding each of the stages was carried out to help decide where the upper limit for the number of the stages is.

Publication Type:	Article
Additional Information:	© 2022 Sharif University of Technology. All rights reserved.
Publisher Keywords:	Wind energy, Multi-stage inducing duct, Inducing suction effect, Wind power augmentation, Low-speed winds
Subjects:	T Technology > TD Environmental technology. Sanitary engineering T Technology > TJ Mechanical engineering and machinery
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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