Ventilator integrated triboelectric nanogenerator based on structure of centrifugal brake

Abstract

Numerous studies have been conducted in the recent years for the practical application of triboelectric nanogenerators (TENGs). The underlying concept of TENG is to convert the inexhaustible kinetic energy obtained from natural sources into mechanical energy for triboelectricity. Among these energy sources, wind energy occurs freely throughout the world and can be easily transformed through mechanical motion. This study proposes a ventilator integrated TENG (VTENG) capable of continuous energy production using a ventilator that converts wind energy into rotational motion. The internal triboelectric generator structure of VTENG is based on the principle of the centrifugal brake to prevent friction at a low rotational speed, which prevents the ventilator from playing its original role due to the rotational disturbance at low speeds. Additionally, a micro/nano surface structure is adopted to prevent stoppage due to strong frictional force during which, both friction and smooth friction are observed. When the rotational speed reaches a certain level, the internal TENG produces friction due to the centrifugal force and generates electric energy. The amount of electric energy generated is measured and analyzed based on the rotational speed. The ventilator is an essential element for air circulation, and the VTENG proposed in this study can be applied to ventilators even in remote locations to generate electric energy. Therefore, it can be considered as an important discovery in identifying the practical application of the TENG.