title: Highly reliable wind-rolling triboelectric nanogenerator operating in a wide wind speed range.
abstract: Triboelectric nanogenerators are aspiring energy harvesting methods that generate electricity from the triboelectric effect and electrostatic induction. This study demonstrates the harvesting of wind energy by a wind-rolling triboelectric nanogenerator (WR-TENG). The WR-TENG generates electricity from wind as a lightweight dielectric sphere rotates along the vortex whistle substrate. Increasing the kinetic energy of a dielectric converted from the wind energy is a key factor in fabricating an efficient WR-TENG. Computation fluid dynamics (CFD) analysis is introduced to estimate the precise movements of wind flow and to create a vortex flow by adjusting the parameters of the vortex whistle shape to optimize the design parameters to increase the kinetic energy conversion rate. WR-TENG can be utilized as both a self-powered wind velocity sensor and a wind energy harvester. A single unit of WR-TENG produces open-circuit voltage of 11.2 V and closed-circuit current of 1.86 μA. Additionally, findings reveal that the electrical power is enhanced through multiple electrode patterns in a single device and by increasing the number of dielectric spheres inside WR-TENG. The wind-rolling TENG is a novel approach for a sustainable wind-driven TENG that is sensitive and reliable to wind flows to harvest wasted wind energy in the near future.
authors.affiliation: School of Mechanical Engineering, Chung-Ang University, 84, Heukseuk-ro, Dongjack-gu, Seoul 156-756, Republic of Korea.
authors.forename: Hyungseok
authors.initials: H
authors.lastname: Yong
authors.affiliation: School of Mechanical Engineering, Chung-Ang University, 84, Heukseuk-ro, Dongjack-gu, Seoul 156-756, Republic of Korea.
authors.forename: Jihoon
authors.initials: J
authors.lastname: Chung
authors.affiliation: Department of Mechanical Engineering, College Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung, Yongin, Gyeonggi 446-701, Republic of Korea.
authors.forename: Dukhyun
authors.initials: D
authors.lastname: Choi
authors.affiliation: Aircraft System Technology Group, Korea Institute of Industrial Technology (KITECH), Yeongcheon-si, Gyeongbuk-do, 38822 Republic of Korea.
authors.forename: Daewoong
authors.initials: D
authors.lastname: Jung
authors.affiliation: School of Mechanical Engineering, Chung-Ang University, 84, Heukseuk-ro, Dongjack-gu, Seoul 156-756, Republic of Korea.
authors.forename: Minhaeng
authors.initials: M
authors.lastname: Cho
authors.affiliation: School of Mechanical Engineering, Chung-Ang University, 84, Heukseuk-ro, Dongjack-gu, Seoul 156-756, Republic of Korea.
authors.forename: Sangmin
authors.initials: S
authors.lastname: Lee