Modeling and experimental investigation of asymmetric distance with magnetic coupling based on galloping piezoelectric energy harvester

Zhang, Huirong; Zhang, Leian; Wang, Yuanbo; Yang, Xiaohui; Song, Rujun; Sui, Wentao

doi:10.1088/1361-665x/ac6a2f

Cited by 19 publications

(10 citation statements)

References 61 publications

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“…Although the energy resources of sea waves and water flows are abundant on Earth, they are usually restricted by geographical factors and are challenging to use fully. In contrast, the wind is the most widely distributed clean energy (Gong et al, 2020;Ma and Zhou, 2022;Ren et al, 2021;Zhang et al, 2017Zhang et al, , 2022b. It is thus of great significance to develop wind energy technology.…”

Section: Introductionmentioning

confidence: 99%

VIV array for wind energy harvesting

Chen,

Wang,

Song

et al. 2024

Journal of Intelligent Material Systems and Structures

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Harvesting energy from flow using vortex-induced vibration (VIV) piezoelectric transducers has gained significant attention in recent decades due to their advantages, such as simple structure, blade-less layout, and low maintenance costs. However, most existing studies have focused on designing and analyzing a single piezoelectric energy harvester (PEH), without investigating the fluid-structure interaction and coupling of multiple PEH arrays. Here, we conducted an experimental study using a 2 × 2 PEH array to investigate its dynamic response under different wind speeds and spacings. Results show that the output voltage of the PEH array increases as the vertical spacing decreases, and the maximum average output voltage of 20.6 V per PEH is obtained when the minimum vertical spacing, maximum horizontal spacing, and resonance wind speed conditions are met. Compared to a single PEH, the 2 × 2 array arrangement increases the average output voltage by up to 168%. Additionally, the average output power under the resistance of 1 MΩ increases by 629% to 4.3×10−4 W per PEH, and the maximum output power increases by 792% to 5.3×10−4. Experiments indicate that the vortex shedding coupling can induce higher vibration in a well-defined array, which paves a new way for developing bladeless wind farms.

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Section: Introductionmentioning

confidence: 99%

VIV array for wind energy harvesting

Chen,

Wang,

Song

et al. 2024

Journal of Intelligent Material Systems and Structures

Self Cite

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“…The study [19] focuses on improving the energy harvesting performance of galloping systems through the use of magnetic coupling. Conversely, the work [20] presents modeling and experimental investigations of asymmetric distances using magnetic coupling based on a galloping piezoelectric energy harvester, aiming to enhance the stability of the generated power. In the articles [21,22], it has been demonstrated that incorporating nonlinear stiffness into the system can significantly increase its efficiency.…”

Section: Introductionmentioning

confidence: 99%

On Efficiency of Two-Degree-of-Freedom Galloping Energy Harvesters with Two Transducers

Sarbinowski,

Starosta

2024

Applied Sciences

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This paper examines the energy efficiency of three variations of the two-degree-of-freedom transverse galloping energy harvester. These variants differ in the number and placement of electromechanical transducers. By utilizing the harmonic balance method, the limit cycles of mathematical models of the devices were determined. Analytical expressions derived from the models were then used to formulate the efficiency of the systems. It was demonstrated that efficiency depends on flow speed and can be comprehensively characterized by the following criteria parameters: peak efficiency, denoting the maximum efficiency of the system, and high-efficiency bandwidth, which describes the range of flow speeds within which the efficiency remains at no less than 90% of peak efficiency. The values of these parameters are heavily reliant on two other parameters: the speed at which the system achieves peak efficiency, referred to as the nominal speed, and also the flow speed at which the system undergoes Hopf bifurcation, namely the critical speed. Comparative analysis revealed that only the device equipped with two electromechanical transducers can potentially outperform a simple one-degree-of-freedom system. For selected parameters, this gain reached nearly 10%.

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“…Zhou et al [ 21 ] designed a wind energy harvesting device consisting of a cantilever beam and a flexible extension structure by imitating the oscillation of leaves in the wind, and they studied the effect of the fan and the T-shaped extension shapes on wind energy harvesting performance. Zhang et al [ 22 ] designed a galloping energy harvester with an asymmetric structure. The cantilever beam was not placed in the middle of the bluff body.…”

Section: Introductionmentioning

confidence: 99%

The Design and Experiment of a Spring-Coupling Electromagnetic Galloping Energy Harvester

et al. 2023

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In order to improve the output characteristics of the electromagnetic energy harvester in a high-speed flow field, a spring-coupling electromagnetic energy harvester (SEGEH) is proposed, based on the galloping characteristics of a large amplitude. The electromechanical model of the SEGEH was established, the test prototype was made, and the experiments were conducted using a wind tunnel platform. The coupling spring can convert the vibration energy consumed by the vibration stroke of the bluff body without inducing an electromotive force into the elastic energy of the spring. This not only reduces the galloping amplitude, but it also provides elastic force for the return of the bluff body, and it improves the duty cycle of the induced electromotive force and the output power of the energy harvester. The stiffness of the coupling spring and the initial distance between the coupling spring and the bluff body will affect the output characteristics of the SEGEH. At a wind speed of 14 m/s, the output voltage was 103.2 mV and the output power was 0.79 mW. Compared with the energy harvester without a coupling spring (EGEH), the output voltage increases by 29.4 mV, with an increase of 39.8%. The output power was increased by 0.38 mW, with an increase of 92.7%.

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Modeling and experimental investigation of asymmetric distance with magnetic coupling based on galloping piezoelectric energy harvester

Cited by 19 publications

References 61 publications

VIV array for wind energy harvesting

VIV array for wind energy harvesting

On Efficiency of Two-Degree-of-Freedom Galloping Energy Harvesters with Two Transducers

The Design and Experiment of a Spring-Coupling Electromagnetic Galloping Energy Harvester

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