A self-tunable wind energy harvester utilising a piezoelectric cantilever beam with bluff body under transverse galloping for field deployment

Lim, Yee Yan; Padilla, Ricardo Vásquez; Unger, Andreas; Barraza, Rodrigo; Thabet, Ahmed Mostafa; Izadgoshasb, Iman

doi:10.1016/j.enconman.2021.114559

Cited by 27 publications

(6 citation statements)

References 53 publications

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“…Xin et al [28] and Lu et al [29] utilized the piezoelectric composite cantilever and different shaped bluff body to scavenge multi-directional wind energy through galloping. Lim et al [30] designed a self-tuneable gallopingbased wind energy harvester with a rotating base and vane to scavenge energy from multiple incident directions, but the results indicated that the rotating base configuration caused a higher cut-in speed, which was possibly due to the dampening effect during the angular movement of the base and adversely affected the energy harvesting potential. A similar structural configuration with extra accessories can be found in Tang et al [31], which introduced a wind vane and PVDF film in the harvester to harvest the multi-directional wind energy and an impact stick was utilized to amplify the output performance.…”

Section: Introductionmentioning

confidence: 99%

A multi-directional and multi-modal galloping piezoelectric energy harvester with tri-section beam

Xia,

Yang,

Tang

et al. 2024

Smart Mater. Struct.

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A traditional wind energy harvester based on galloping can only scavenge wind energy from one specific direction, which fails to work efficiently in a natural erratic environment. In this study, we propose a galloping-based piezoelectric energy harvester that can collect energy from wind flow in a wide range of incident directions with multiple vibrational modes being excited. The proposed harvester is composed of a tri-section beam with bonded piezoelectric transducers and a square bluff body with splitters. Finite element analysis of the tri-section beam structure is first performed and confirms the clustered natural frequencies that ease the excitation of different modes. Then, the aerodynamic characteristics of various bluff bodies is conducted through CFD to compare the capability of galloping. Finally, the wind tunnel experiment is carried out to test the wind energy harvesting performance by utilizing the harvester's multi-modal characteristics. The results demonstrate that the proposed harvester can scavenge wind energy in multiple directions with the capability of galloping in multiple vibrational modes, and superior performance is achieved when the second bending mode is triggered. The novel design of the harvester from this work provides a viable solution for harvesting wind energy in a natural environment with varying wind conditions.

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Section: Introductionmentioning

confidence: 99%

A multi-directional and multi-modal galloping piezoelectric energy harvester with tri-section beam

Xia,

Yang,

Tang

et al. 2024

Smart Mater. Struct.

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“…today is the use of environmentally friendly, clean, and renewable energy to power low-power electronic gadgets. At this stage, the more commonly used energy sources mainly include rotational mechanical energy [4,5], solar energy [6], wind energy [7,8], etc. The energy harvesting device can convert the above environmental energy into electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Pendulum type magnetically coupled rotary piezoelectric energy harvester

Liu,

Yan,

Zhong

et al. 2024

Smart Mater. Struct.

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This research proposes a rotary motion-based non-contact pendulum piezoelectric energy harvester (P-PEH). The working region of the piezoelectric vibrator can be maintained in a magnetically coupled system at all times by means of a motion conversion mechanism. The combination of the motion conversion mechanism and the magnetic coupling system not only reduces the loss of the piezoelectric material, but also improves the output performance of the piezoelectric vibrator. The paper investigates the effects of the excitation distance L, the radius of the base circle R, and the number of excitation magnets N on the output performance of the P-PEH. When the input speed of 600 rpm, L = 10 mm, R = 21 mm, and N = 1, the peak-to-peak voltage (Vpp ) is 58.75 V. At this parameter, the output power of the device with an external 20 kΩ load is 0.0187 W. The viability of P-PEH was finally demonstrated through several application testing. P-PEH can easily light up 63 LEDs while its output energy can keep the temperature and humidity sensor in use. In summary, P-PEH can effectively collect external rotational energy for power storage and supply, and supply electricity to wireless sensor networks and microelectronic devices with further studies.

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“…Lim et al [20] proposed a self-regulating wind energy harvester using a rotating base. Compared with the static base, the rotating base structure can reduce the impact of natural wind instability and obtain higher output power.…”

Section: Introductionmentioning

confidence: 99%

Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

Zheng,

Li,

Zhang

2024

Energies

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Galloping-based piezoelectric energy harvesting systems are being used to supply renewable electricity for low-power wireless sensor network nodes. In this paper, a W-shaped bluff body is proposed as the core component of a piezoelectric wind energy harvester. Experiments and simulations have shown that the W-shaped bluff body can improve harvesting efficiency at low wind speeds. For the W-shaped structure, the finite element simulation results indicate that the structure can help improve the aerodynamic performance to obtain high aerodynamic force. The experimental results demonstrate that compared with the traditional bluff bodies, the piezoelectric wind energy harvester with the W-shaped bluff body (WEHW) can generate higher output voltages and has a lower cut-in speed. When the length L is 30 mm and the rear groove angle β is 30°, the W-shaped structure can induce the best harvesting performance. When an external load resistance of 820 KΩ is connected and the wind speed is 5 m/s, the WEHW generates an average output power of 0.28 mW.

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A self-tunable wind energy harvester utilising a piezoelectric cantilever beam with bluff body under transverse galloping for field deployment

Cited by 27 publications

References 53 publications

A multi-directional and multi-modal galloping piezoelectric energy harvester with tri-section beam

A multi-directional and multi-modal galloping piezoelectric energy harvester with tri-section beam

Pendulum type magnetically coupled rotary piezoelectric energy harvester

Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

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