A water-proof magnetically coupled piezoelectric-electromagnetic hybrid wind energy harvester

Zhao, Lingmin; Zou, Hong‐Xiang; Yan, Ge; Liu, Fengwei; Tan, Ting; Zhang, Wen Ming; Meng, Guang

doi:10.1016/j.apenergy.2019.02.006

Cited by 199 publications

(48 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on vortex-induced motions, the mechanism of generating device can be divided into piezoelectric [42][43][44], electromagnetic, and electrostatic [45][46][47], among which, piezoelectric type is used and valued the most. Most piezoelectric energy harvesters use a cantilever beam of one or two piezoelectric ceramic layers [48].…”

Section: Physical and Mathematical Modelsmentioning

confidence: 99%

Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Jin

Wang

et al. 2019

Complexity

View full text Add to dashboard Cite

Since the energy demand increases, the sources of fluid energy such as wind energy and marine energy have attracted widespread attention, especially vortex-induced vibrations excited by wind energy. It is well known that the lock-in effect in vortex-induced vibration can be applied to the piezoelectric energy harvester. Although numerous researches have been conducted on piezoelectric energy harvesting devices in recent years, a common problem of low bandwidth and harvesting efficiency still exists. In order to increase the response amplitude and decrease the threshold wind speed of vortex-induced vibration, a bionic attachment structure is proposed based on the experimental method. In the present work, twelve models are designed according to the size of pits and hemispheric protrusions which are added to the surface of a flexible smooth cylinder. Compared with the smooth cylinder which is taken as a carrier, the harvester with the bionic structure shows stronger energy capture performance on the whole. As the threshold speed decelerates from 1.8m/s to 1 m/s, the bandwidth, on the contrary, increases from 39.3% to 51.4%. Particularly, for the 10 mm pits structure with 5 columns, its peak voltage can reach 47 V, and its peak power can reach 1.21 mW with a resistance of 800 kΩ, 0.57 mW higher than that of the smooth cylinder. Comparatively speaking, the hemispherical projections structure figures with a much more different energy capturing characteristic. Starting from the column, the measured voltage of the hemispherical bionic harvester is much smaller than that of the smooth cylinder, with a peak voltage less than 15 V and a reducing bandwidth. However, compared with the smooth cylinder, hemispheric projections with 3 columns have a better energy capture effect with a measured voltage of 35V, a resistance of 800kΩ, and a wind speed of 3.097 m/s. Besides, its output power also enhances from 0.48 to 0.56 mW.

show abstract

Section: Physical and Mathematical Modelsmentioning

confidence: 99%

Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Jin

Wang

et al. 2019

Complexity

View full text Add to dashboard Cite

show abstract

“…Small‐scale wind energy harvesters are cheap and easy to produce and maintain due to their simple mechanism 10,11 . Based on their structure and working principle, wind energy‐harvesting methods are generally categorized into two main groups: (I) wind induced beam vibration and (II) blade rotation driven by wind 12 . In the first group, flow phenomena such as galloping, 1,13 vortex shedding, 14,15 and flutter 6,16 are used to induce beam vibration.…”

Section: Introductionmentioning

confidence: 99%

“…In the first group, flow phenomena such as galloping, 1,13 vortex shedding, 14,15 and flutter 6,16 are used to induce beam vibration. A variety of mechanisms such as piezoelectricity, 4,14 triboelectricity, 11,16 and electromagneticity 6,12,15 have been proposed in the literature to convert mechanical energy from beam vibrations into useful electrical energy. Among these mechanisms, the one based on piezoelectric method is the most appealing candidate, because piezoelectric harvesters are simple, easy to manufacture, economic, and capable of generating greater power density 17 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical and numerical fluid–structure interaction study of a microscale piezoelectric wind energy harvester

2020

View full text Add to dashboard Cite

In this paper, an analytical approach and two numerical models have been developed to study an energy-harvesting device for micropower generation. This device uses wind energy to oscillate a cantilevered beam attached to a piezoelectric layer for generating electric energy output. The analytical approach and the first numerical model consider the fluid-structure interaction phenomenon in the harvester performance.The equations governing beam oscillations and airflow have been coupled to a set of four differential equations in the analytical approach. This set of equations has been solved to determine the beam deflection and the air pressure variation with time.The numerical methods have been conducted by employing a commercial software.The results of the analytical method and the first numerical model have been compared in different working conditions, and their credibility has been discussed. In the second numerical model, the electromechanical performance of the piezoelectric material has also been incorporated in the harvester device analysis. This model has been verified against experimental data for the output voltage and power of the device available in the literature. Finally, the effect of different geometrical parameters has been studied on the harvester performance, and suggestions have been made to improve the harvester efficiency. K E Y W O R D Sanalytical and numerical approaches, fluid-structure interaction, microscale, piezoelectric wind energy harvester | INTRODUCTIONMicroelectronic and micromechanical systems such as wireless sensor networks, biomedical implantable devices, and health monitoring systems have gained extensive interest for various applications in the research community and industrial field. 1,2 These systems normally use batteries to provide electrical energy required for their operation. However, the need for regularly replacing or recharging batteries makes their application costly and cumbersome. Due to these concerns, technologies capable of generating electrical power by harvesting environmental energy have been considered as a promising alternative for batteries, especially for autonomous devices operating for long periods with no human intervention, 3-6 and various types of such technologies have been developed for harvesting energy from different sources like solar power, thermal gradients, mechanical vibrations, and air and water flows. 7,8 Airflow or wind is a renewable and green energy source widely available in many situations where microsystems are installed like heating, ventilation and air conditioning systems, road and mining tunnels, and moving objects. In a comprehensive study, Watson et al. provided an expert view of emerging technologies within the wind energy sector considering their potential, challenges, and applications. For each technology, an

show abstract

“…In addition, many wind-induced vibration energy harvesters have been proposed [12]. Lots of studies proved that it is feasible to harvest wind-induced vibration energy through piezoelectric materials [28][29][30][31][32][33][34]. However, improving the electromechanical conversion efficiency and power density for wind-induced vibration energy harvesters is an urgent problem to be solved.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shape and Piezoelectric-Patch Length on Energy Conversion of Bluff Body-Based Wind Energy Harvester

et al. 2020

View full text Add to dashboard Cite

The technology of scavenging ambient energy to realize self-powered of wireless sensor has an important value in practice. In order to investigate the effects of piezoelectric-patch length and the shape of front bluff body on energy conversion of the wind energy harvester by flow-induced vibration, the characteristics of a piezoelectric wind energy harvester based on bluff body are experimentally studied in this work. Four different section shapes of the bluff body, including triangular cylinder, trapezoidal cylinder, reverse trapezoidal cylinder, and square cylinder, are tested. The piezoelectric patch is attached on the leeward side of the bluff body. The lengths of piezoelectric patch are considered as 1.0D–1.4D (D is the characteristic length of the bluff body). It is found that the length of the piezoelectric patch and the shape of the front bluff body play a vital role in improving the performance of wind energy harvester. For the reverse trapezoidal cylinder and square cylinder, the back-to-back vortex-induced vibration (VIV) and galloping phenomenon can be observed. In addition, the energy harvesting performance of the reverse trapezoidal cylinder piezoelectric harvester is the best. The maximum average peak voltage of 1.806 V and the output power of P=16.3 μW can be obtained when external resistance and the length of piezoelectric patch are 100 KΩ and 1.1D, respectively.

show abstract

A water-proof magnetically coupled piezoelectric-electromagnetic hybrid wind energy harvester

Cited by 199 publications

References 47 publications

Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Analytical and numerical fluid–structure interaction study of a microscale piezoelectric wind energy harvester

Influence of Shape and Piezoelectric-Patch Length on Energy Conversion of Bluff Body-Based Wind Energy Harvester

Contact Info

Product

Resources

About