Study on a piezo-windmill for energy harvesting

Kan, Junwu; Fan, Chuntao; Wang, Shuyun; Zhang, Zhonghua; Wen, Jianming; Huang, Leshuai

doi:10.1016/j.renene.2016.05.055

Cited by 79 publications

(27 citation statements)

References 17 publications

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“…Despite all of these efforts, the efficiency of piezoelectric wind harvesters still needs to be enhanced, and methods to improve the performance of the developed piezoelectric harvesters are still key technologies 27 . Accordingly, in this paper, analytical and numerical approaches are developed to study and improve the performance a piezoelectric wind energy harvester proposed in Clair et al 28 A schematic of this device is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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

2020

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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

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Section: Introductionmentioning

confidence: 99%

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

2020

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“…Using renewable macroenergy harvesting systems like solar energy [1][2][3][4][5][6] or wind energy [7][8][9][10] has become popular over the past few decades. In recent years, the advancement of new methods and applications of wireless networks drives the demand on microenergy harvesting for continuous power supply [11].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations

et al. 2019

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Harvesting electricity from low frequency vibration sources such as human motions using piezoelectric energy harvesters (PEH) is attracting the attention of many researchers in recent years. The energy harvested can potentially power portable electronic devices as well as some medical devices without the need of an external power source. For this purpose, the piezoelectric patch is often mechanically attached to a cantilever beam, such that the resonance frequency is predominantly governed by the cantilever beam. To increase the power generated from vibration sources with varying frequency, a multiresonant PEH (MRPEH) is often used. In this study, an attempt is made to enhance the performance of MRPEH with the use of a cantilever beam of optimised shape, i.e., a cantilever beam with two triangular branches. The performance is further enhanced through optimising the design of the proposed MRPEH to suit the frequency range of the targeted vibration source. A series of parametric studies were first carried out using finite-element analysis to provide in-depth understanding of the effect of each design parameters on the power output at a low frequency vibration. Selected outcomes were then experimentally verified. An optimised design was finally proposed. The results demonstrate that, with the use of a properly designed MRPEH, broadband energy harvesting is achievable and the efficiency of the PEH system can be significantly increased.

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“…Karami et al [32] proposed a piezoelectric transducer using bistable piezoelectric bimorphs for low speed wind energy harvesting. Kan et al [33] presented a piezo-windmill that is excited by rotating magnets to harvest low and wide range wind speed. Fu and Yeatman [34] developed a rotational harvester with bi-stability and frequency up-conversion to harness low rotation speed kinetic energy with a wide bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…However, rare work has been proposed by combining multiple nonlinear mechanisms together for rotation energy harvesting, which is supposed to exhibit better performance. In order to optimize the structure and enhance the performance of the rotational energy harvester in [33], a magnetic axial coupling structure with an optimized magnetic frequency up-conversion mechanism is proposed in this paper. Therefore, a magnetic-coupled buckled beam piezoelectric rotational energy harvester (MBBP-REH) is designed for low speed rotational energy harvesting with a wide response bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Investigation of a Piezoelectric Rotation Energy Harvester Using Bistable and Frequency Up-Conversion Mechanisms

et al. 2018

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Harvesting energy from rotational motion for powering low-power electrical devices is attracting increasing research interest in recent years. In this paper, a magnetic-coupled buckled beam piezoelectric rotation energy harvester (MBBP-REH) with bistable and frequency up-conversion is presented to harvest low speed rotational energy with a broadband. A buckled beam attached with piezoelectric patches under dynamical axial load enables the harvester to achieve high output power under small excitation force. The electromechanical coupling dynamical model is developed to characterize the MBBP-REH. Both the simulations and experiments are carried out to evaluate the performance of the harvesters in various conditions under different excitations. The experimental results indicate that the proposed harvester is applicable for low speed rotation and can generate stable output power under wideband rotating excitation. For the harvester with two magnets that produce attractive forces with the center magnet of the buckled beam, the average power is 682.7 μW and the maximum instantaneous power is 1450 μW at 360 r/min.

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Study on a piezo-windmill for energy harvesting

Cited by 79 publications

References 17 publications

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

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

Performance Enhancement of a Multiresonant Piezoelectric Energy Harvester for Low Frequency Vibrations

Design and Experimental Investigation of a Piezoelectric Rotation Energy Harvester Using Bistable and Frequency Up-Conversion Mechanisms

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