Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 60, Issue 3, Pages 1116-1118Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2012.2187413
Keywords
Flow energy harvesting; flow-induced vibration (FIV); piezoelectric cantilever (PEC); piezoelectric energy harvester
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Funding
- Nanotechnology Institute, a University Grant program of the Commonwealth of Pennsylvania's Ben Franklin Technology Development Authority through Ben Franklin Technology Partners of Southeast Pennsylvania
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We present a new piezoelectric flow energy harvester (PFEH) based on a piezoelectric cantilever (PEC) with a cylindrical extension. The flow-induced vibration of the cylindrical extension causes the PEC to vibrate at the natural frequency of the PFEH. The PFEH provides a low-cost, compact, and scalable power source for small electronics by harvesting energy from ambient flows such as wind and water streams. Prototypes were tested in both laminar and turbulent air flows, demonstrating the feasibility of the design. Turbulence excitation was found to be the dominant driving mechanism of the PFEH with additional vortex shedding excitation contribution in the lock-in region.
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