Design and research of a water energy piezoelectric energy harvester that changes the linear arrangement of magnet

Lipeng He, Shuangjian Wang, Renwen Liu, Baoyu Sun, Junlei Wang and Jieqiong Lin

Energy, 2023, vol. 284, issue C

Abstract: In this paper, a water energy piezoelectric energy harvester (W-PEH) with altered linear arrangement of magnets is proposed and investigated. By changing the linear arrangement of magnets, the vibration frequency of piezoelectric patch is improved. The bottom magnet maintains the magnetic field balance of the entire magnetic coupling system, ensure the smooth running of the prototype. Piezoelectric patch is mounted at a reasonable angle to further enhance the output efficiency. Theoretical modeling and simulation explain the main factors affecting the output performance of W-PEH (the number of magnets arranged linearly and the installation angle of piezoelectric patch). To study the variables above and influence to the output performance, an experimental test system is built. Simulation and experiment show that the maximum output voltage and power of W-PEH are 8V and 1.25 mW respectively when the magnet is arranged linearly at 3 and the piezoelectric patch is installed at 30°. In the application experiment, W-PEH can successfully light up 72 light emitting diodes (LEDs), and real-time hydrological monitoring is possible. Therefore, W-PEH can greatly improve the efficiency of transmitting hydrological monitoring data through self-powered technology. Meanwhile, it provides a new solution for improving the output performance of water energy piezoelectric energy harvester.

Keywords: Energy harvester; Linear arrangement; Frequency increase; Water energy (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:284:y:2023:i:c:s0360544223027706

DOI: 10.1016/j.energy.2023.129376

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