A T-shaped piezoelectric cantilever for fluid energy harvesting

Kwon, Soon-Duck

doi:10.1063/1.3503609

Cited by 205 publications

(91 citation statements)

References 12 publications

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“…Consequently, it was determined that the onset speed of galloping is 0.4 m/s. This speed is smaller than those reported in the literature (e.g., 2.5 m/s in Yang et al, 24 8 mph (3.57 m/s) in Sirohi and Mahdik, 18 and 4 m/s in Kwon 25 ).…”

contrasting

confidence: 52%

Performance enhancement of piezoelectric energy harvesters from wake galloping

Abdelkefi

Scanlon

McDowell

et al. 2013

Applied Physics Letters

135

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contrasting

confidence: 52%

Performance enhancement of piezoelectric energy harvesters from wake galloping

Abdelkefi

Scanlon

McDowell

et al. 2013

Applied Physics Letters

135

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“…Piezoelectric harvesters show a distinctly promising scalability. Last year's research results show a focusing towards at least two piezoelectric materials: PZT (lead-zirconate-titanate) [5,6] and PVDF [4,8,9]. PVDF has much lower piezoelectric coefficients than PZT and let expect relatively low converted power.…”

Section: Energy Harvesting In Flowing Mediamentioning

confidence: 99%

“…Typical concepts to achieve this are the piezoelectric conversion used [4][5][6][7][8][9][10]. Additionally, electromagnetic conversion was presented in Refs.…”

Section: Energy Harvesting In Flowing Mediamentioning

confidence: 99%

Power Source for Wireless Sensors in Pipes

Keddis¹,

Schwesinger²

2016

JCEA

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Abstract:In this paper, we present investigations on energy harvesters for wireless sensors inside pipes. The harvesters are of flexible piezoelectric PVDF (Poly-Vinylidene-Di-Fluoride) and aluminum-foils as electrodes. The layers were stacked alternating on each other and wound to a spool. An LDPE (low-density polyethylene)-film wraps the spool and prevents the inflow of liquids. A ring shaped bluff body was placed inside the pipe to induce turbulence in the fluid stream. As the harvesters have been arranged downstream of the bluff body, they were forced to oscillate independent of the media. This led to a polarization and a separation of electrical charges. Experiments were carried out in a wind channel as well as in a water pipe. In air, the spool oscillates with a frequency of about 30 Hz, at a wind speed of about 7 m/s. A voltage of about 4 V (peak-peak) was measured. This delivers in case of impedance adjustment power values of about 0.54 µW. In water, oscillation starts at a speed above 0.6 m/s. The average oscillation frequency is about 18 Hz. At a velocity of 0.74 m/s, a peak-peak-voltage up to about 2.3 V was found. In case of impedance adjustment, the power was about 0.33 µW. This power is stored in a capacitor. Assuming a data transmission unit consumes about 0.2 mWs during one operational period of 1 s, the duty cycle can be calculated to about 6.2 min for air harvesting and 10.1 min for harvesting in water.

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“…Many researchers have explored the characteristic of electricity generation in different special air environments [18][19][20][21][22][23]. Sealed space is one such special environment.…”

Section: Introductionmentioning

confidence: 99%

Development of a Nonlinear Piezoelectric Energy Harvester for Alternating Air Load

Wang

Cheng

et al. 2016

Applied Sciences

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Abstract:The demand for energy-harvesting technology is steadily growing in the field of self-powered wireless sensor systems for use in pneumatic systems. The purpose of this research was to study an energy harvester excited by alternating air load in a pneumatic system. The harvester was designed to consist of a power chamber and a compressed chamber, and to the bottom of the power chamber a piezoelectric patch as been affixed. The harvester is excited by the changing pressure, which can be adjusted through changing volume, and the alternating air pressure energy can be harvested through the deformation of the piezoelectric patch. A test system was built and a prototype device was tested under various experimental conditions. The test results show that the energy generation performance of the harvester can be influenced by varying the volume compression parameters, with the output voltage increasing when the flow increases. The maximal output voltage and power are 24.7 V and 1.06 mW, respectively. An effective power of 0.28 mW was measured across the 200 kΩ resistor at a pressure of 200 kPa and a cycle time of 2.5 s with a flow of 150 L/min.

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A T-shaped piezoelectric cantilever for fluid energy harvesting

Cited by 205 publications

References 12 publications

Performance enhancement of piezoelectric energy harvesters from wake galloping

Performance enhancement of piezoelectric energy harvesters from wake galloping

Power Source for Wireless Sensors in Pipes

Development of a Nonlinear Piezoelectric Energy Harvester for Alternating Air Load

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