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Appl. Sci. 2017, 7(2), 116; doi:10.3390/app7020116

A Piezoelectric Energy Harvester with Bending–Torsion Vibration in Low-Speed Water

1
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
2
School of Mechatronics Engineering, Shandong University of Technology, Zibo 255049, China
*
Author to whom correspondence should be addressed.
Academic Editor: Chien-Hung Liu
Received: 9 December 2016 / Revised: 9 January 2017 / Accepted: 17 January 2017 / Published: 25 January 2017
(This article belongs to the Section Energy)
View Full-Text   |   Download PDF [2818 KB, uploaded 26 January 2017]   |  

Abstract

This paper presents a piezoelectric energy harvester using an eccentric cylinder undergoing bending–torsion vibration in low-speed water. It can harvest energy from water using vortex-induced vibration (VIV). A distributed parameter beam model with respect to the motion of the piezoelectric beam was established based on Euler–Bernoulli beam theory. The governing coupled equations of the harvester system were derived by Lagrange’s equations. The optimal configurations and work conditions of harvesters were numerically analyzed according to the above mathematical models. Experiments were designed and performed to verify the numerical results. The numerical results were in good agreement with the experiment results, which verifies the validity of the mathematical models. The harvester with bending–torsion vibration generated an output power of 0.3978 mW, which is 1.99 times of that of the harvester with a solid-cylinder tip undergoing bending only. View Full-Text
Keywords: vortex-induced vibration; piezoelectric energy harvester; bending–torsion vibration; eccentric cylinder; low-velocity water vortex-induced vibration; piezoelectric energy harvester; bending–torsion vibration; eccentric cylinder; low-velocity water
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shan, X.; Deng, J.; Song, R.; Xie, T. A Piezoelectric Energy Harvester with Bending–Torsion Vibration in Low-Speed Water. Appl. Sci. 2017, 7, 116.

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