Roh Hyeonhee, Yu Jinsoo, Kim Inkyum, Chae Yunseok, Kim Daewon
Department of Electronic Engineering, Institute for Wearable Convergence Electronics , Kyung Hee University , 1732 Deogyeong-daero , Giheung-gu, Yongin 17104 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Jul 17;11(28):25170-25178. doi: 10.1021/acsami.9b05915. Epub 2019 Jul 1.
A rotating-disk-based triboelectric nanogenerator (TENG) generating electrical energy from wind usually includes a propeller. TENGs are widely used because their high frequency of rotation allows them to generate a relatively high output current. Deep analysis of the gas flow in a TENG is essential to improve its energy conversion efficiency. However, previous studies have isolated the propeller and the TENG as separate entities that harvest wind energy and generate electrical energy, respectively. Most studies focused on each entity because considering both the dynamics and the TENG operation together is an intricate process. This paper introduces a dynamic analysis of the gas flow by dividing it into four vertical and horizontal directions and carrying out a COMSOL simulation to verify the pressure on the propeller and the flow of the gas. The electrical outputs are measured while varying the height and angle of the inlet and the number of wings on the propeller. After optimization, the P-TENG generated a high output power density of 283.95 mW/m, which can light up 205 light-emitting diodes and drive a commercial small electronic appliance. In addition, optimizing the P-TENG through a variety of analyses allowed it to provide sustainable power to a self-powered wireless sensor system.
一种基于旋转盘的摩擦电纳米发电机（TENG），其利用风能发电，通常包括一个螺旋桨。TENG被广泛应用，因为其高旋转频率使其能够产生相对较高的输出电流。深入分析TENG中的气流对于提高其能量转换效率至关重要。然而，先前的研究将螺旋桨和TENG视为分别收集风能和产生电能的独立实体。大多数研究聚焦于每个实体，因为同时考虑动力学和TENG运行是一个复杂的过程。本文通过将气流划分为四个垂直和水平方向并进行COMSOL模拟来验证螺旋桨上的压力和气流，从而引入对气流的动态分析。在改变入口高度和角度以及螺旋桨叶片数量的同时测量电输出。经过优化，该P-TENG产生了283.95 mW/m的高输出功率密度，能够点亮205个发光二极管并驱动一个商用小型电子设备。此外，通过各种分析对P-TENG进行优化，使其能够为自供电无线传感器系统提供可持续的电力。
