Ventilator integrated triboelectric nanogenerator based on structure of centrifugal brake

Heo, Yoon-Gi; Kim, Chang-Lae; Kim, Gang-Min; Lee, Kwang-Seok; Hwang, Woonbong; Lee, Jeong‐Won

doi:10.1016/j.surfin.2021.101525

Cited by 9 publications

(2 citation statements)

References 47 publications

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“…The device comprises a flexible triboelectric layer, which undergoes contact and separation phases with a stationary counterpart powered by the external force of wind dynamics. Wind-driven TENG can be typically categorized into two primary structure types: rotational, [91][92][93][94][95] and flow-induced, [96][97][98][99][100] both developed to enhance the efficiency of wind energy harvesting.…”

Section: Wind-induced Solid-solid Tengmentioning

confidence: 99%

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

Cheng,

Zhang,

et al. 2024

Adv Materials Technologies

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As the increasing scarcity of fossil fuels and the ever‐present need to address environmental concerns are faced, the development of efficient and sustainable energy harvesting techniques gains more and more significance. The liquid–solid triboelectric nanogenerator (TENG) has emerged as a promising solution for harvesting mechanical energy in water. Although the liquid–solid contact electrification technique is studied by numerous researchers, there is still a need to enhance energy harvesting efficiency in liquid–solid TENG. This comprehensive review discusses recent advances in kinetic energy harvesting from water, focusing on the solid–solid and liquid–solid interaction mechanisms when using TENGs as an energy conversion medium. The review summarizes the recent developments in structure design and material improvements, as well as hybridization with other generators as methods of enhancing the output performance of TENG. Besides discussing advancements of TENG, the potential impact and future challenges of liquid–solid TENG are highlighted. This paper provides insight into the current state of knowledge and the future directions of research in the field of liquid–solid TENG energy harvesting.

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Section: Wind-induced Solid-solid Tengmentioning

confidence: 99%

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

Cheng,

Zhang,

et al. 2024

Adv Materials Technologies

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“…[ 30 ] YG Heo's team at the University of Korea proposed a ventilator‐integrated TENG based on the structure of a centrifugal brake in 2021, which contacts at high‐speed rotation and separates at low speed rotation. [ 31 ] These TENGs can automatically switch between contact and noncontact modes under spring force or centrifugal force, have a wide operating frequency range, have a long lifetime, and have high mechanical energy conversion robustness. However, they share a common disadvantage in that the separation conditions are related to thrust or speed.…”

Section: Introductionmentioning

confidence: 99%

Highly Robust Self‐Switching Mode Triboelectric Nanogenerator Based on Misaligned Triple‐Cam Design

He,

Wei,

et al. 2023

Adv Eng Mater

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To enhance the robustness and lifespan of triboelectric nanogenerator (TENG) and facilitate its industrial applications, herein, a self‐switching mode TENG that combines the advantages of contact mode and noncontact mode TENG is presented. Noncontact mode TENG prevents material wear but generates insufficient power, whereas contact enhances power generation by increasing the charge density on the electrode surface. The proposed device can automatically switch between contact and noncontact modes through a triple‐cam mechanism and gear train deceleration mechanism. Experimental results determine the optimal force value of 6 N and corresponding cam height of 1 mm, contact time of 8 min, and noncontact time of 30 min, to ensure good power output and minimal material wear. Simulation results demonstrate that the three cams have more stable mechanical properties and can improve the device's robustness. The cam repose angle and gear train structure are optimized based on the curves of electrical output versus time for both modes, and a method is proposed to extend the self‐switching time. The self‐switching mode TENG has a longer life than the other two modes, with its transfer charge maintaining 90% of its initial value after 80 h of continuous operation.

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Advanced Aerodynamics‐Driven Energy Harvesting Leveraging Galloping‐Flutter Synergy

Dong,

Hu,

Tang

et al. 2024

Adv Funct Materials

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Flow‐induced vibrations (FIVs) serve as the fundamental principle of non‐rotary wind energy harvesting. However, nanogenerators relying on a single FIV effect remain constrained by insufficient breeze energy conversion efficiency. In this paper, we propose a novel galloping‐flutter coupled nanogenerator (GFNG) that leverages the synergistic interaction between these two aerodynamic phenomena, to achieve high performance across broad wind speed bandwidth. A galloping‐flutter coupled mechanism (GFM) is implemented using a multifunctional flexible beam that integrates a galloping piezoelectric energy harvester (GPEH) and a fluttering triboelectric nanogenerator (FTENG). Through meticulous optimization, it significantly enhances the average electrical output of the FTENG by up to six times at low wind speeds below 6 m s−1, by intensifying the triboelectric contact behavior through galloping‐induced beam oscillations. The GFNG demonstrates a maximum average power of 6.3 mW across wind speeds from 1.4 to 10 m s−1, along with a remarkable power density of 7.1 W m−2 of the enhanced FTENG at 10 m s−1, enabling the lighting of 508 LEDs and stable power supply for wireless sensor nodes (WSNs). This study offers new insights into designing high‐performance aerodynamics‐driven nanogenerators by harnessing multiple FIV synergistic effects, broadening the potential for intelligent wind energy applications.

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Ventilator integrated triboelectric nanogenerator based on structure of centrifugal brake

Cited by 9 publications

References 47 publications

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

Highly Robust Self‐Switching Mode Triboelectric Nanogenerator Based on Misaligned Triple‐Cam Design

Advanced Aerodynamics‐Driven Energy Harvesting Leveraging Galloping‐Flutter Synergy

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