Piezoelectric energy droplet harvesting and modeling

Alkhaddeim, Tasneim; Alshujaa, Boshra; Albeiey, Waad; AlNeyadi, Fatima; Ahmad, Mahmoud Al

doi:10.1109/icsens.2012.6411440

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…Vatansever et al (2011) performed a parametric study on the piezoelectric beam configuration and revealed that drop size and drop height would affect the output voltage. Experimental study conducted by Alkhaddeim et al (2012) showed that a lead zirconate titanate (PZT) piezoelectric beam can harvest an instantaneous power of 23 mW with 0.23 g of water drop hitting at the tip of the beam. In another related study, a simulation of raindrop impact on piezoelectric membrane based on different rain types was conducted by Perara et al (2014).…”

Section: Introductionmentioning

confidence: 99%

On accumulation of water droplets in piezoelectric energy harvesting

Wong

Sam

2016

Journal of Intelligent Material Systems and Structures

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Recent studies have demonstrated that it is feasible to harvest energy from raindrop. A challenge in designing a raindrop energy harvester is the rain droplet would accumulate on the surface of the harvester and affect its performance. In a previous work, we have modelled the dynamics of a piezoelectric beam subjected to water droplet impacts with a water layer formed on the surface. This work presents a theoretical model to describe the transient dynamics during the formation of water layer on the beam. The average water droplet impact force is described by a partially inelastic impact coefficient that varies during the formation of water layer. The maximum root mean square voltage measured experimentally is 0.05 V with an average percentage error of 6.94% compared to the theoretical model. Experimental result revealed that the optimal performance of the harvester occurs before the water layer spreads to the width end of the beam.

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Section: Introductionmentioning

confidence: 99%

On accumulation of water droplets in piezoelectric energy harvesting

Wong

Sam

2016

Journal of Intelligent Material Systems and Structures

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“…The numerical analysis provides insight on the total harvestable power for each rain type. Meanwhile, Alkhaddeim et al (2012) have revealed that a lead zirconate titanate (PZT) cantilever bimorph is able to produce a maximum power of 23 mW on a rain energy harvester by introducing a water droplet mass of 0.23 g onto the tip of the cantilever. The model was developed via lumped-parameter method (Roundy et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Other than that, the dynamic model of piezoelectric beam subjected to water droplet impact has been developed by Guigon et al (2008b), Alkhaddeim et al (2012) and Perara et al (2014). It is assumed that the impact between the water droplet and the piezoelectric device is perfectly inelastic.…”

Section: Introductionmentioning

confidence: 99%

“…However, the coefficient of restitution has to be determined through experiments (Mak et al, 2011). Furthermore, the experiments conducted by Guigon et al (2008a), Vatansever et al (2011 and Alkhaddeim et al (2012) considered only single droplet test. In actual rainfall, the raindrop will accumulate on the surface of the piezoelectric energy harvester forming a water layer.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of a piezoelectric beam subjected to water droplet impact with water layer formed on the surface

Wong

Yap

2014

Journal of Intelligent Material Systems and Structures

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Rain impact energy harvesting using piezoelectric energy harvester has gained much attention recently. However, previous works have only considered the effect of single water droplet. In the case of raindrop, water would accumulate on the surface of the energy harvester and form a shallow water layer. This article models the dynamics of a piezoelectric beam, served as a raindrop energy harvester, subjected to water droplet impact with water layer formed on the surface. The impact of water droplet on the tip of the energy harvester is modelled as an impulsive force, and the water layer on the surface of the energy harvester is modelled as an added mass to the energy harvester. An attempt to model the force generated by the water ripple as a distributed load on the piezoelectric beam is presented. Numerical studies have been conducted based upon the proposed mathematical model verified by experimental results. The results showed that the presence of the water layer affects the output voltage and the dominant frequency of the energy harvester. It reveals that the effect of water (or rain) accumulation on the piezoelectric surface should be considered in deriving an optimal operating condition of such energy harvester.

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“…However, turbines are inefficient with low water supply and generators are bulky and heavy. Energy harvesters exploiting the kinetic energy of free-falling droplets impacting on piezoelectric cantilevers were investigated in [4] and [5], but very low energy levels, around 1 nJ per droplet [4], can be extracted mainly due to the resonant nature of piezoelectric cantilevers. The authors are with the Department of Engineering, Università degli Studi della Campania "Luigi Vanvitelli," Aversa, 81031 Caserta, Italy (e-mail: luigi.costanzo@unicampania.it; alessandro.…”

Section: Introductionmentioning

confidence: 99%

Circuital Modeling of a Droplet Electrical Generator

2023

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A droplet electrical generator (DG) is an energy harvester able to scavenge energy from water droplets sliding on its surface. A compact electrical model of a droplet generator is here presented together with a black-box identification procedure. Even if previous research works have shown the great potential of the droplet generator in terms of extracted power and have investigated the optimization of the device, a simple equivalent electrical circuit is not available, which is fundamental for predicting its behavior and for designing its electronic interface, devoted to maximizing the power extraction under varying source and load conditions. A detailed identification procedure for the model parameters is also presented, in order to overcome the issues due to the high voltage, low current, high bandwidth, and unknown time-waveform of the time-varying capacitances. It is also shown how the proposed model allows the designer to predict analytically and numerically the energy that can be extracted by the generator. Finally, experimental tests are presented to show that the proposed model and the outlined procedure are able to effectively predict with good accuracy the system behavior under different operating conditions.

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Piezoelectric energy droplet harvesting and modeling

Cited by 10 publications

References 8 publications

On accumulation of water droplets in piezoelectric energy harvesting

On accumulation of water droplets in piezoelectric energy harvesting

Dynamics of a piezoelectric beam subjected to water droplet impact with water layer formed on the surface

Circuital Modeling of a Droplet Electrical Generator

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