Small-scale Piezoelectric Energy Harvesting Devices Using Low Energy Density Sources

Lallart, Mickaël; Priya, Shashank; Bressers, Scott; Inman, Daniel J.

doi:10.3938/jkps.57.947

Cited by 14 publications

(10 citation statements)

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“…Moreover, raindrops can be collected using a water tank at a higher platform. The rainwater with gravitational energy could be released into the PZT turbine arm [39,40]. This will rotate the turbine, and thus the PZT will be bend and harvest energy.…”

Section: Comparison Of Different Designs and Excitation Elementsmentioning

confidence: 99%

“…Rotational mechanical energy is one of the significant power sources for piezoelectric energy harvesting. Various types of rotational power sources have been used in the past few years for piezoelectric energy harvesting, such as rotational machines [9][10][11][12][13][14][15][16][17][18], vehicle tire [19][20][21][22][23], human motion [24][25][26][27][28], and even wind [29][30][31][32][33][34][35][36] and fluids [31,32,[37][38][39][40][41]. They have been applied in various applications, such as tire pressure monitoring system TPMS [42][43][44], WSNs in any rotary machine [11,45,46], wearable device and medical implants [47][48][49][50][51], and others.…”

Section: Introductionmentioning

confidence: 99%

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Rotational Piezoelectric Energy Harvesting: A Comprehensive Review on Excitation Elements, Designs, and Performances

et al. 2021

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Rotational Piezoelectric Energy Harvesting (RPZTEH) is widely used due to mechanical rotational input power availability in industrial and natural environments. This paper reviews the recent studies and research in RPZTEH based on its excitation elements and design and their influence on performance. It presents different groups for comparison according to their mechanical inputs and applications, such as fluid (air or water) movement, human motion, rotational vehicle tires, and other rotational operational principal including gears. The work emphasises the discussion of different types of excitations elements, such as mass weight, magnetic force, gravity force, centrifugal force, gears teeth, and impact force, to show their effect on enhancing output power. It revealed that a small compact design with the use of magnetic, gravity, and centrifugal forces as excitation elements and a fixed piezoelectric to avoid a slip ring had a good influence on output power optimisation. One of the interesting designs that future works should focus on is using gear for frequency up-conversion to enhance output power density and keep the design simple and compact.

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Section: Comparison Of Different Designs and Excitation Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rotational Piezoelectric Energy Harvesting: A Comprehensive Review on Excitation Elements, Designs, and Performances

et al. 2021

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“…The exergy wasted was 36.75 W, indicating that a considerable amount of energy can still be extracted. In addition, piezoelectric plucking transducers 34 can also be employed at the core of these rotational generators for rainwater energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Small‐scale experimental study on the optimisation of a rooftop rainwater energy harvester using electromagnetic generators in light rains

Bao

Wang

2020

Int J Energy Res

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This research proposes a new rooftop rainwater energy harvester using electromagnetic generators, which demonstrates better rain-energy harvesting performance than the traditional rainwater energy harvesters that use electromagnetic generators under light rain conditions. Conventionally, the rainwater collected from the roof of a building or a residential attic using the installed roof gutter system is drained directly along a pipe to drive water turbines combined with electromagnetic generators for generating electricity. Such an energy harvesting method has high energy harvesting efficiency under heavy rain conditions but is inefficient under light rain conditions. To improve the energy harvesting efficiency in light rains, a pipe-connected tank including a passive rainwater buffer is introduced and fixed below the rooftop gutters in the proposed structure. The passive rainwater buffer is attached above the pipe-connected tank. After collecting a certain amount of rainwater from the gutters, the passive rainwater buffer automatically releases the rainwater periodically into the pipe-connected tanks. The released rainwater results in a large flow along the pipe, which can drive water turbines with electromagnetic generators to work at a high efficiency for a short period of time. A small-scale experimental prototype was built for validating the energy harvesting performance of the proposed structure. The results show that the intermittent highefficiency power generation of the proposed structure is better than the continuous low-efficiency power generation of the traditional structure during light rains. The proposed structure can charge a 680 μF capacitor with at least nine times the electrical energy that is stored in a conventional capacitor for a rainwater flow rate of less than 300 mL/min in the same amount of time. However, with the increase in the rainwater flow, the energy harvesting performance gap between the proposed structure and the traditional one gradually narrows.

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“…The few rare existing literature on harvesting rainfall energy has opted for piezoelectric material as the primary transducer [29,30,34]. Piezoelectric material yields an electrical charge polarisation when mechanical strain is induced, and vice versa.…”

Section: Harvesting the Kinetic Energy Of Rainfallmentioning

confidence: 99%

“…The inclusion of a reservoir acts as an energy buffer and allows a more continuous and less time-varying operation of the subsequent transduction mechanism. A piezoelectric watermill driven from a water tank has been estimated to yield average energy densities in the order of 10 W/m 3 to 100 W/m 3 [34]. Rotational generators require a certain flow rate to overcome the inertia and operate at an optimal speed.…”

Section: Technique Ii: Potential Energy Collection-based Generationmentioning

confidence: 99%

Hybrid Decentralised Energy for Remote Communities: Case Studies and the Analysis of the Potential Integration of Rain Energy

Miao¹,

Jia²

2014

J. sustain. dev. energy water environ. syst.

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For remote underdeveloped and sparsely populated regions, the use of national power grids to provide electricity can be both unsustainable and impractical. In recent years, decentralised renewable power has gained popularity, endowing social benefits to the local inhabitants through clean rural electrification. However, power reliability and system autonomy are often the primary technical concerns as current systems are largely single source reliant. Hybrid power systems that utilise multiple complementary renewables can help to reduce the dependency on conventional unclean options. A few selected case studies for both single source and hybrid power systems are reviewed, analysing critical success factors and evaluating existing difficulties. The additional integration of the novel rain-powered kinetic-to-electric generator technology to the existing hybrid model is analysed. As with development in general, there is no one-size-fits-all solution to bringing power to remote communities and the most sustainable solution should be found through analysing local resources, environmental conditions and maximising local involvement.

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Small-scale Piezoelectric Energy Harvesting Devices Using Low Energy Density Sources

Cited by 14 publications

References 0 publications

Rotational Piezoelectric Energy Harvesting: A Comprehensive Review on Excitation Elements, Designs, and Performances

Rotational Piezoelectric Energy Harvesting: A Comprehensive Review on Excitation Elements, Designs, and Performances

Small‐scale experimental study on the optimisation of a rooftop rainwater energy harvester using electromagnetic generators in light rains

Hybrid Decentralised Energy for Remote Communities: Case Studies and the Analysis of the Potential Integration of Rain Energy

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