Novel hybrid piezoelectric harvesters based on a nonlinear x-structure for ocean wave energy harvesting

Meng Li, Xingjian Jing

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A novel hybrid ocean wave energy harvesting (WEH) system is investigated in this study based on an X-shaped structure coupled with piezoelectric harvesters of special arrangements. In this system, the X-shaped structure not only acts as a supporting structure that transfers the mechanical energy from the base excitation, but also as a master and tunable structure. This enables the resonant harvesting frequency of the harvesters to match the ambient ocean wave whose frequency is usually below 5 Hz. The piezoelectric harvesters are specially installed on the X-shaped structure to explore potential benefits that the X-shaped structure could provide. Each piezoelectric beam has two layers composed of a PVC (Polyvinyl chloride) base patch and a MFC (Micro fiber composite) patch. Two types of special mounting configurations (horizontal and vertical) of the beam harvesters are designed, and the beam harvesters are mounted on the X-shaped structure through auxiliary horizontal and vertical leverages respectively. The results indicate that, the energy harvesting performance of the piezoelectric harvesters can be enhanced especially in low-frequency range by the proposed novel arrangements, compared with simple cantilevered piezoelectric harvesters. The X-structure based generators can enable piezoelectric materials to harvest power from ocean wave energy which is at low frequency range, and the harvesting systems demonstrate beneficial nonlinear properties and/or features by employing the X-structure, without a risk of losing stability. Also, several structural parameters can be easily adjusted to achieve tunable and ultra-low resonant harvesting frequency and wider energy harvesting bandwidth. The design and results would provide an innovative solution and insight to improve the energy harvesting efficiency in small-scale ocean wave energy harvesting to power wireless sensor networks for multiple offshore applications.

Original languageEnglish
Title of host publication25th International Congress on Sound and Vibration 2018, ICSV 2018
Subtitle of host publicationHiroshima Calling
PublisherInternational Institute of Acoustics and Vibration, IIAV
Pages4847-4852
Number of pages6
ISBN (Electronic)9781510868458
Publication statusPublished - 1 Jan 2018
Event25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018 - Hiroshima, Japan
Duration: 8 Jul 201812 Jul 2018

Publication series

Name25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling
Volume8

Conference

Conference25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018
Country/TerritoryJapan
CityHiroshima
Period8/07/1812/07/18

Keywords

  • Ocean wave energy harvesting
  • Offshore wireless sensor networks
  • Piezoelectric harvesters
  • Tunable ultra-low dynamic stiffness
  • X-shaped structure

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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