Ocean wave energy harvesting with a piezoelectric coupled buoy structure

Wu, Nan; Wang, Q.; Xie, Xiangdong

doi:10.1016/j.apor.2015.01.004

Cited by 124 publications

(50 citation statements)

References 28 publications

(34 reference statements)

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“…So far, such devices have been studied with rather simplified mathematical models, in which the effect of the piezoelectric layers on the dynamic response of the system was neglected. The bending force resulting from the action of the waves on the structure was plugged separately into the electric circuit equations to estimate the voltage on the piezoelectric layers [9][10][11]. With that simplified approach, the hydro-electromechanical problem was in fact uncoupled into two separate wave-structure and electric problems.…”

Section: Introductionmentioning

confidence: 99%

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Hydroelectromechanical modelling of a piezoelectric wave energy converter

Renzi¹

2016

Proc. R. Soc. A.

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We investigate the hydroelectromechanical-coupled dynamics of a piezoelectric wave energy converter. The converter is made of a flexible bimorph plate, clamped at its ends and forced to motion by incident ocean surface waves. The piezoceramic layers are connected in series and transform the elastic motion of the plate into useful electricity by means of the piezoelectric effect. By using a distributed-parameter analytical approach, we couple the linear piezoelectric constitutive equations for the plate with the potential-flow equations for the surface water waves. The resulting system of governing partial differential equations yields a new hydroelectromechanical dispersion relation, whose complex roots are determined with a numerical approach. The effect of the piezoelectric coupling in the hydroelastic domain generates a system of short- and long-crested weakly damped progressive waves travelling along the plate. We show that the short-crested flexural wave component gives a dominant contribution to the generated power. We determine the hydroelectromechanical resonant periods of the device, at which the power output is significant.

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Section: Introductionmentioning

confidence: 99%

“…Novel PWEC concepts include cantilevered beams [9,10] and piezoelectric buoys [11]. So far, such devices have been studied with rather simplified mathematical models, in which the effect of the piezoelectric layers on the dynamic response of the system was neglected.…”

Section: Introductionmentioning

confidence: 99%

Hydroelectromechanical modelling of a piezoelectric wave energy converter

Renzi¹

2016

Proc. R. Soc. A.

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“…Consequently, Wireless Sensor Networks (WSNs) technology has gained increasing attention in industrial automation [1][2][3][4], structural health monitor-ing [5][6][7][8][9], agriculture [7], and military applications [10][11][12][13]. Although the electrochemical batteries are usual power sources for these sensors, energy harvesting has some advantages compared to them and has attracted signi cant attention throughout the last decade.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric energy harvesting from vertical piezoelectric beams in the horizontal fluid flows

Amini¹,

Emdad

Farid

2017

Scientia Iranica

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Abstract. Piezoelectric Energy Harvesting (PEH) of uid-ow energy has attracted signi cant attention throughout the last decade. In the previous PEH from uid ow, a piezoelectric beam was placed behind a blu body, such as circular cylinders. Hence, the piezoelectric beam oscillated due to the vortex shedding behind of the blu body. Subsequently, this vibration generated voltage in the beam. In many engineering vehicles such as airplanes, the strong vortex shedding caused by blu body was destructive and reduced the e ciency of devices; therefore; it was not proper to attach a blu body to these devices. In this paper, PEH from vertical beams in low speeds and high-speed ows is investigated. The current work shows that in contrast to low-speed ows, the extracted power from vertical beam in high-speed ows is considerable. Moreover, as a practical example of vertical beam in high-speed ows, the energy harvesting from piezoelectric Gurney ap attached to an NACA2412 airfoil is investigated. Finally, this study proposes a piezoelectric vertical beam with attached end cylinder as an energy harvester in the lowspeed ows. It is indicated that this device has strong vibration and, therefore, produces a remarkable electrical power.

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“…Several studies have used piezoelectric patches or stacks for the vibration energy harvesting so far. [23][24][25] Piezoelectric materials have been also widely employed in wind, [26][27][28] ocean, [29][30][31] bridge and roadway, 32,33 pavement, 34 and vibration energy harvesting. 20 A device for harvesting energy from the beetle wing motion has been designed, fabricated, and tested.…”

Section: Introductionmentioning

confidence: 99%

“…22 Piezoelectric devices are also suitable in sound energy harvesting and have been the subject of numerous studies so far. [23][24][25] Piezoelectric materials have been also widely employed in wind, [26][27][28] ocean, [29][30][31] bridge and roadway, 32,33 pavement, 34 and vibration energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of piezoelectric vibration energy harvesting with auxetic boosters

2019

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This paper proposes a new concept to enhance the efficiency of the vibration energy harvesting via an intermediate booster. The boosters have auxetic struc-tures and exert extra stretching strain in two perpendicular directions. The concept is tested on a conventional cantilever beam under the base excitation. The problem consists of a cantilever beam subjected to a body load at low frequencies. An auxetic substrate is bonded to the beam with a thin epoxy layer, and the piezoelectric (PZT) element is attached on top of it. Two different auxetic structures are investigated in this study. It is shown that employing these kinds of boosters can remarkably enhance the performance of the energy harvesting system. The harvesting efficiency is numerically evaluated in different load amplitudes and frequencies. A parametric study is then carried out, and effects of different geometrical design parameters of the auxetic boosters on the performance of the energy harvesting system are investigated. Comparing with the case in which the PZT is straightly attached to the cantilever, it is shown that adding such intermediate boosters at low-frequency range can increase the extracted power by factors of 3.9 and 7.0 for the two proposed geometries.

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Ocean wave energy harvesting with a piezoelectric coupled buoy structure

Cited by 124 publications

References 28 publications

Hydroelectromechanical modelling of a piezoelectric wave energy converter

Hydroelectromechanical modelling of a piezoelectric wave energy converter

Piezoelectric energy harvesting from vertical piezoelectric beams in the horizontal fluid flows

Enhancement of piezoelectric vibration energy harvesting with auxetic boosters

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