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Microenergy harvester for remote ocean buoys using piezoelectric sensors coupled with superballs

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Title Microenergy harvester for remote ocean buoys using piezoelectric sensors coupled with superballs
 
Creator Hann, J M
Mudgal, B V
Jinoj, T P S
 
Subject Energy harvesting
Microgenerator
Microprocessor
Piezoelectric diaphragm
Superball
Waveflume
 
Description 801-810
Wave energy is a renewable resource with high energy potential. This research work proposes a low power piezoelectric
energy harvesting system based on the heave motion of ocean buoys. This Piezoelectric Energy Harvester (PEH) is
composed of piezoelectric diaphragms coupled with superballs to enhance the output of the piezoelectric sensor. The PEH
setup is designed within a floating buoy and tested in a wave flume by varying the frequency of regular waves. The heaving
of the buoy causes the superball to oscillate and impact upon the piezo diaphragms thereby producing power. This output is
then processed using appropriate AC to DC converter and booster circuits. The single-axis sensor-diaphragm responses
under regular wave conditions with varying wave heights were analyzed. A rms voltage of about 2.56 V was generated for a
wave height of 0.21 m and wave period of 1.2 s. The wave flume experimental results show that the maximum harvested
power was about 80 mW by the entire piezo sensor diaphragm setup for the wave height range of 0.06 m to 0.21 m and
wave period of 1.22 s to 2.13 s. Using the same technique in the ocean buoys of diameter 0.9 m in the swell wave conditions
between 0.5 to 3.5 m significant wave height, the system can generate maximum voltage of up to 16 V using 28 numbers of
superballs with sensors arranged in parallel/series combinational power circuits. This harvesting technique will be very
much useful for coastal & offshore buoys to harvest power in a hybrid approach during the failure in solar battery charging
during monsoon and unfavorable weathers.
 
Date 2023-06-27T12:05:50Z
2023-06-27T12:05:50Z
2023-06
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/62122
https://doi.org/10.56042/ijms.v51i10.2929
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.51(10) [October 2022]