期刊
RENEWABLE ENERGY
卷 184, 期 -, 页码 551-563出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.11.113
关键词
Aero-electric energy harvester; Piezoelectric micro -generator; Cantilever configuration ultra -flexible; Wireless sensor
资金
- French Region Pays de la Loire via the RFI program WISE
This paper presents an ultra-flexible piezoelectric air flow energy harvester capable of powering a wireless sensor. The method to easily adapt the aero-electric generator to the wind is presented, and different configurations have been tested to determine the best one for energy harvesting. The optimization of energy harvesting through mechanical and electrical coupling is also discussed, resulting in improved performance.
This paper presents an ultra-flexible piezoelectric air flow energy harvester capable of powering a wireless sensor. The method to easily adapt the aero-electric generator to the wind is presented. In the wind tunnel, different configurations have been tested to determine the best one for energy harvesting at low wind speed. In particular, the galloping configuration, with the addition of a bluff body at the free end of the cantilever which allows to improve the performance of the micro-generator by coupling the vibrations induced by the vortices and the galloping phenomena. In this study, we also present a method to optimize the energy harvesting without increasing the volume of the device. The effects of mechanical and electrical coupling of several generators on the performance of energy harvesting are presented. Thus, with the electrical parallel coupling of four generators, we obtained a maximum power of 60 mu W instead of 30 mu W with two generators for a wind speed of about 6 m/s. The mechanical coupling of the micro-generators allowed the device to keep the same volume (asymptotic to 540 cm(3)), however the threshold wind speed to increase (> 6 m/s). The harvested energy was then used to operate a wireless sensor.& nbsp;(c) 2021 Elsevier Ltd. All rights reserved.
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