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

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Listed:
  • Kan, Junwu
  • Wang, Jin
  • Meng, Fanxu
  • He, Chenyang
  • Li, Shengjie
  • Wang, Shuyun
  • Zhang, Zhonghua

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.

Suggested Citation

  • Kan, Junwu & Wang, Jin & Meng, Fanxu & He, Chenyang & Li, Shengjie & Wang, Shuyun & Zhang, Zhonghua, 2023. "A downwind-vibrating piezoelectric energy harvester under the disturbance of a downstream baffle," Energy, Elsevier, vol. 262(PA).
    • Handle: RePEc:eee:energy:v:262:y:2023:i:pa:s0360544222023118
    DOI: 10.1016/j.energy.2022.125429
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    References listed on IDEAS

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    1. Kan, Junwu & Fu, Jiawei & Wang, Shuyun & Zhang, Zhonghua & Chen, Song & Yang, Can, 2017. "Study on a piezo-disk energy harvester excited by rotary magnets," Energy, Elsevier, vol. 122(C), pages 62-69.
    2. Wang, Shuyun & Yang, Zemeng & Kan, Junwu & Chen, Song & Chai, Chaohui & Zhang, Zhonghua, 2021. "Design and characterization of an amplitude-limiting rotational piezoelectric energy harvester excited by a radially dragged magnetic force," Renewable Energy, Elsevier, vol. 177(C), pages 1382-1393.
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    1. Zhang, Li & Kan, Junwu & Lin, Shijie & Liao, Weilin & Yang, Jianwen & Liu, Panpan & Wang, Shuyun & Zhang, Zhonghua, 2024. "Design and performance evaluation of a pendulous piezoelectric rotational energy harvester through magnetic plucking of a fan-shaped hanging composite plate," Renewable Energy, Elsevier, vol. 222(C).
    2. Kan, Junwu & Zhang, Li & Wang, Shuyun & Lin, Shijie & Yang, Zemeng & Meng, Fanxu & Zhang, Zhonghua, 2023. "Design and characterization of a self-excited unibody piezoelectric energy harvester by utilizing rotationally induced pendulation of along-groove iron balls," Energy, Elsevier, vol. 285(C).
    3. Wang, Hao & Yi, Minyi & Zhang, Zutao & Zhang, Hexiang & Liu, Jizong & Zhu, Zhongyin & Wang, Qijun & Yuan, Yanping, 2023. "A wind-solar energy harvester based on airflow enhancement mechanism for rail-side devices," Energy, Elsevier, vol. 283(C).

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