Characteristics of Electric Energy Conversion in Pneumatic System Based on Piezoelectric Generator
Publication: Journal of Energy Engineering
Volume 147, Issue 2
Abstract
This paper reports the development of a high load-carrying capacity piezoelectric generator (PG) to harvest the great amount of compressed air energy wasted by the moving cylinder in a pneumatic system. The PG is designed to convert the pressure energy induced by compressed air into electrical energy. The coupling model of the piezoelectric patch is established under pressure motivation. The relationship between the output voltage and the piezoelectric patch deformation has been analyzed, and the output voltage is calculated through the simulation model. The simulation result demonstrates that the output voltage is when the load resistance is . The prototype generator consists of a chamber and a piezoelectric patch, which is sealed at the bottom. The prototype is installed in a real pneumatic system to test energy conversion performance, and it is driven by the compressed air that can be influenced by the moving piston. The energy exchange capacity of the proposed PG is analyzed by testing the output voltage and power generated under real working conditions. The test results show that the output voltage is increased when the moving distance decreases. The maximal output voltage and power are and 7.77 mW, respectively. The analysis of the testing results shows that the energy exchange capacity of the PG is highly relevant to the piston moving distance.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This project is supported by the National Natural Science Foundation of China (No. 51775130).
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Information
Published In
Journal of Energy Engineering
Volume 147 • Issue 2 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 11, 2020
Accepted: Nov 17, 2020
Published online: Jan 7, 2021
Published in print: Apr 1, 2021
Discussion open until: Jun 7, 2021
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