Piezoelectric Power Harvesting via Acoustic-Pressure Driven by Low-Speed Wind-Force with Resonating-Tube and Wind-Collector

• 作者: Hajime Arimura Hiroya Taguchi Kentaro Takagi Norifumi Isu Noriyuki Kobayashi Seigo Saito Seiichi Deguchi Takahiko Sano Takashi Nozoe Tsuyoshi Inoue
• 来源期刊: 电力能源(英文)
• 学科: 医学
• 关键词: PIEZOELECTRIC POWER Generation Low WIND Speed Resonating TUBE WIND COLLECTOR POWER HARVESTING Practical Demonstration
• 年，卷（期）: 2018,（11）
• 页码范围: 53-64
• 页数: 12页
• 分类号: R73

摘要

Wind-driven power harvestings attract attentions since their target wind speeds are quite low less than the so-called cut-in wind speed, which is generally recognized as around 3 m/s. The extant power harvestings driven by wind-induced-air-column-resonations (i.e. acoustic-pressures) are still lacking simplicity, scale flexibility and solid strategies for practical applications. Therefore, the piezoelectric power harvesters via acoustic-pressures driven by low-speedwind-forces with resonating-tubes and wind-collectors were invented so as to complement all the lacks. The wind-collector as well as the resonating-tube contributed to upraise the power harvesting density. The champion power harvesting density of 19.5 nW/dm2 could be procured at 2.3 m/s of an artificial wind and the optimal resonating-tube and wind-collector. Power harvesting proofs from the natural wind with low mean speeds down to about 0.6 m/s were successfully obtained. The cut-in wind speed of the prototype piezoelectric power harvester was found to be quite low as about 0.4 m/s, signifying its ubiquity. Finally, a multi-bundle pendant-type piezoelectric power harvester was specifically presented together with professing the solid and multiple strategies for practical applications.