Scientia Iranica

Scientia Iranica

Hybrid numerical-experimental study of an offshore piezoelectric energy harvesting from water waves

Document Type : Research Article

Authors
Seyed Behnam Hosseini
Mohammad Mostafa Mohammadi
Jafar Ghazanfarian
Mechanical Engineering Department, Faculty of Engineering, University of Zanjan, Zanjan, Iran.
10.24200/sci.2024.61609.7404
Abstract
A novel cantilever piezoelectric energy harvester with a modified structure of tilting beam has been designed to harness energy from water waves. New suggestions are presented for analysis of the interaction of the nonlinear waves with the beam surface using a hybrid theoretical/experimental approach. The experimental tests are conducted to investigate the e ect of di erent design parameters such as the longitudinal distance of the cantilever beam from the wave-maker, the shape of the oar-like tip of the beam, the angle of spatial orientation, the strength of the waves, the material of the piezo-harvester, and the depth of the beam below the free surface on the output voltage. Numerical simulations are conducted based on the beam deformation captured by a high-speed camera. It is found that adding the torsional moment led to the generation of about 13% and 50% higher Root Mean Square (RMS) and peak-to-peak voltages in comparison to the pure bending case, respectively. By increasing the indentation from 3 cm to 6 cm, about an 18be captured in the produced voltage. These results can be used to train a model for a control system to keep the optimum angle between the water waves and the beam.
Keywords
Water waves
Energy harvesting
Piezoelectric effects
Free-surface flows
Direct energy conversion
Subjects
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Scientia Iranica
Volume 32, Issue 20
Transactions on Mechanical Engineering
November and December 2025 Article ID:7404

  • Receive Date 07 January 2023
  • Revise Date 31 January 2024
  • Accept Date 29 May 2024