12 April 2010 Wind energy harvesting using a piezo-composite generating element (PCGE)
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Energy can be reclaimed and stored for later use to recharge a battery or power a device through a process called energy harvesting. Piezoelectric is being widely investigated for use in harvesting surrounding energy sources such as sun, wind, tides, indoor lighting, body movement or machine vibration, etc. This paper introduces a wind energy harvesting device using a Piezo-Composite Generating Element (PCGE). The PCGE is composed of layers of carbon/epoxy, PZT ceramic, and glass/epoxy cured at an elevated temperature. In the prototype, The PCGE performs as a secondary beam element. One end of the PCGE is attached on the frame of the device. The fan blade rotates in the direction of the wind and hits the PCGE's tip. When the PCGE is excited, the effects of the beam deformation allow it to generate electric power. In wind tunnel experiments, the PCGE is excited to vibrate at its first natural frequency and generates the power up to 8.5 mW. The prototype can harvest energy in urban regions with minor wind movement.
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Cam Minh Tri Tien and Nam-Seo Goo "Wind energy harvesting using a piezo-composite generating element (PCGE)", Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 764337 (12 April 2010); doi: 10.1117/12.848573; https://doi.org/10.1117/12.848573

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