Harvest wind energy from a vibro-impact DEG embedded into a bluff body

Lai, Zhihui; Wang, Junlei; Zhang, C.L.; Zhang, G.Q.; Yurchenko, Daniil

doi:10.1016/j.enconman.2019.111993

Cited by 95 publications

(38 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Marine Renewable Energy Laboratory (MRELab) further developed the VIVACE to harvest the hydrokinetic power using the electromagnetic transduction. In recent years, energy harvesting technologies such as electromagnetic, 16 dielectric, 17,18 and triboelectric [19][20][21] have been reported by researchers, besides which piezoelectric energy harvesting has been studied widely because of its high voltage output, high power density, and ease of miniaturization. [22][23][24][25][26][27][28][29][30] Dai et al 31 presented a theoretical model for a linear VIV-based piezoelectric energy harvester (VIVPEH), where the wake oscillator model was employed to formulate the vortexinduced aerodynamic force acting on the cylinder.…”

Section: Discussionmentioning

confidence: 99%

Equivalent circuit representation of a vortex‐induced vibration‐based energy harvester using a semi‐empirical lumped parameter approach

et al. 2020

View full text Add to dashboard Cite

Summary Small‐scale wind energy harvesting from vortex‐induced vibrations (VIV) has been introduced in recent years as a renewable power source for microelectronics and wireless sensors. Previous studies have focused on modeling and optimizing the VIV‐based piezoelectric energy harvester (VIVPEH) structures and simplified the complicated interface circuits as pure resistors with an alternating current (AC) output. In practice, an AC output is required to be transformed into a direct current (DC) followed by further regulations before being used for real applications. Incorporating the rectification and regulation, traditional theoretical and numerical models will become extremely cumbersome and even impossible. To address this issue, this work proposes an equivalent circuit model (ECM) for a typical VIVPEH. The Scanlan‐Ehsan aerodynamic force model is employed to describe the fluid‐structure interaction. Wind tunnel experiments are carried out to validate the derived model. The performances of the VIVPEH with AC and DC interface circuits are subsequently analyzed and compared to understand the influences of these circuits on the operational wind speed bandwidth, power output, vibration amplitude, and electrical damping.

show abstract

Section: Discussionmentioning

confidence: 99%

Equivalent circuit representation of a vortex‐induced vibration‐based energy harvester using a semi‐empirical lumped parameter approach

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The maximal capacitance of the DEM at one impact can be further obtained [43]: A , which is a function of  . It should be noted that  at each impact is related to the impact velocity and the material stiffness, which is also influenced by the pre-stretched ratio.…”

Section: B Parametric Analysis Of the Ssi Modelmentioning

confidence: 99%

“…A DEG works as a variable capacitance [40,41]. Up to now, several DE-based VEH devices have been developed such as the ocean wave generator [42], wind energy harvester [43,44], and heel like strike generator [45], etc. However, most of the proposed DEGs utilize the properties of DE membranes (DEMs), which undergo the in-plane deformation.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, a type of impact-based DEGs, such as the vibro-impact (VI) DEG system proposed by the authors previously [50][51][52][53], appeared in the past years providing a novel design for DE-based VEH. Especilly, the authors have proposed a galloping-based wind energy harvester with a VI DEG [43]. In this work a simple impact experiment was conducted to identify the dielectric elastomer membrane's dielectric permittivity, coefficient of restitution and largest deflection against impact speed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation on the Impact-Based Energy Conversion of a Dielectric Elastomer Membrane

et al. 2020

View full text Add to dashboard Cite

Dielectric elastomer generators (DEGs) provide a new solution for vibrational energy harvesting. Currently, a type of impact-based DEGs, which can harvest energy from ambient vibrations, has been proposed and studied through simulations. However, the energy conversion mechanism and the performance evaluation approach of such impact-based DEGs have not been fully studied yet, thus limiting the reliability of the research on the system design/optimization and performance evaluation. In this paper, a single-sided impact (SSI) model is proposed to reveal the impact-based energy conversion mechanism. Based on this model, a complete four-stage impact process is analyzed to reveal the energy conversion mechanism, and the electrical outputs and energy conversion efficiency are derived as the energy harvesting performance evaluation indexes. To use the developed analytical model to predict the system electrical response accurately, some important parameters including the coefficient of restitution (COR) and largest deflection of the membrane at impacts were obtained experimentally, and the system output voltages at impacts were measured to verify the theoretical approaches in calculating the system electrical outputs and studying the parameters' influences. Furthermore, the influences of the pre-stretched ratio, impact velocity, and input voltage on the system energy harvesting performance are studied through simulations. The research results can provide guidelines to improve the energy harvesting performance of the impact-based DEGs in real applications.

show abstract

“…Recently, vibrational nonlinear energy harvesters have been receiving more and more attention because they have the better energy harvesting performance than traditional linear energy harvesters under time-varying ambient environmental excitations [4][5][6][7][8][9]. By far, di erent kinds of highperformance nonlinear energy harvesters have been designed based on geometric nonlinearity, additional nonlinear magnetic force, residual thermal stress, or active/ passive control strategies [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Resonance Mechanism of Nonlinear Vibrational Multistable Energy Harvesters under Narrow‐Band Stochastic Parametric Excitations

2019

View full text Add to dashboard Cite

To improve energy harvesting performance, this paper investigates the resonance mechanism of nonlinear vibrational multistable energy harvesters under narrow-band stochastic parametric excitations. Based on the method of multiple scales, the largest Lyapunov exponent which determines the stability of the trivial steady-state solutions is derived. The first kind modified Bessel function is utilized to derive the solutions of the responses of multistable energy harvesters. Then, the first-order and second-order nontrivial steady-state moments of multistable energy harvesters are considered. To explore the stochastic bifurcation phenomenon between the nontrivial and trivial steady-state solutions, the Fokker–Planck–Kolmogorov equation corresponding to the two-dimensional Itô stochastic differential equations is solved by using the finite difference method. In addition, the mechanism of the stochastic bifurcation of multistable energy harvesters is analyzed for revealing their unique dynamic response characteristics.

show abstract

Harvest wind energy from a vibro-impact DEG embedded into a bluff body

Cited by 95 publications

References 55 publications

Equivalent circuit representation of a vortex‐induced vibration‐based energy harvester using a semi‐empirical lumped parameter approach

Equivalent circuit representation of a vortex‐induced vibration‐based energy harvester using a semi‐empirical lumped parameter approach

Investigation on the Impact-Based Energy Conversion of a Dielectric Elastomer Membrane

Resonance Mechanism of Nonlinear Vibrational Multistable Energy Harvesters under Narrow‐Band Stochastic Parametric Excitations

Contact Info

Product

Resources

About