A downwind-vibrating piezoelectric energy harvester under the disturbance of a downstream baffle

Junwu Kan, Jin Wang, Fanxu Meng, Chenyang He, Shengjie Li, Shuyun Wang and Zhonghua Zhang

Energy, 2023, vol. 262, issue PA

Abstract: Wind energy harvesting using piezoelectric transduction is becoming a promising alternative for battery-free wireless electronics. To offer a promising solution for low structure reliability of Piezoelectric Wind-induced Vibration Energy Harvesters (PWVEHs) under fairly high wind speed, a Downwind-Vibrating Piezoelectric Energy Harvester under the disturbance of a downstream baffle (DVPEH) is proposed in this paper. Unlike the most existing PWVEHs of which the bluff body swung against the wind, the structure reliability of energy harvester was improved with the downstream structure of the DVPEH. A downstream baffle was introduced to adjust the working characteristics of DVPEH to avoid the disadvantage of small amplitude of downwind structure. Meanwhile, the dynamic and electrical characteristics of the DVPEH under the disturbance of a downstream baffle was explored to enhance the power generation capacity. To prove the structural feasibility and ascertain the influence of the downstream baffle, theoretical investigation, simulation, fabrication and experimental testing were conducted. The results showed that the interaction of vortex-induced vibration and galloping was induced by the downstream baffle to accelerate the oscillation of the bluff body. Besides, the distance-diameter ratio, width-diameter ratio and length ratio brought significant effects on the performance in terms of electric output and cut-in wind speed. A maximum power of 0.42 mW was achieved at the optimal load resistance of 100 kΩ with the wind speed of 16 m/s and 20 blue LEDs in series was successfully driven by the DVPEH. It was expected that this study could provide a reference for improving the structure reliability and electric output of traditional PWVEHs.

Keywords: Wind energy harvester; Piezoelectric transduction; Downwind bluff body; Downstream baffle; Structure reliability (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222023118
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:262:y:2023:i:pa:s0360544222023118

DOI: 10.1016/j.energy.2022.125429

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().