An underwater flag-like triboelectric nanogenerator for harvesting ocean current energy under extremely low velocity condition
An underwater flag-like triboelectric nanogenerator for harvesting ocean current energy under extremely low velocity condition
复制标题
一种用于在极低速度条件下收集海流能量的水下旗状摩擦纳米发电机
DOI：
10.1016/j.nanoen.2021.106503
复制
发表时间：
2021-09-13
期刊：
影响因子：
17.6
通讯作者：
Xu, Minyi
中科院分区：
文献类型：
--
作者：
Wang, Yan;Liu, Xiangyu;Xu, Minyi
海流能量采集器是实现海洋无线传感系统自给的一种很有前途的基础设施。提出并研究了一种基于流致振动的水下旗形摩擦电纳米发电机(UF-TENG)。UF-Teng由两个导电油墨涂覆的聚对苯二甲酸乙二酯薄膜和一条聚四氟乙烯薄膜组成，其边缘用防水聚四氟乙烯胶带密封。这样，摩擦电层就不会与水接触。验证了圆柱体诱导的涡街增强了超滤腾的振动。低速启动使UF-Teng能够获得极低速度的洋流能量，例如，目前达到0.133米/S作为临界启动速度。与电磁发电机和压电发电机相比，所提出的UF-Teng具有结构简单、低速性能好等优点。通过参数研究，评价了超滤灯的几何参数对其振动特性和输出性能的影响。实践证明，UF-Teng并联单元可以为水下电器提供动力。目前的UF-Teng是一种更具成本效益和更容易获得的水力发电技术，可以利用可再生的海流为物联网中的传感器或微电器供电。
Ocean current energy harvester is a promising infrastructure to achieve self-powered marine wireless sensing system. This study proposes and investigates an underwater flag-like Triboelectric Nanogenerator (UF-TENG) based on the flow-induced vibration. The UF-TENG consists of two conductive ink-coated polyethylene terephthalate membranes and one strip of poly tetra fluoroethylene membrane with their edges sealed up by a waterproof PTFE tape. In this way, the triboelectric layers are prevented from contacting water. It is verified that the vortex street induced by a cylinder enhances the vibration of the UF-TENG. The low velocity startup enables the UF-TENG to harvest extremely low-velocity ocean current energy, e.g., presently achieving 0.133 m/s as the critical startup velocity. The proposed UF-TENG has a simpler structure and better low velocity performance when comparing with electromagnetic generators and piezoelectric generators. Parametric studies are conducted to evaluate the influence of geometrical parameters of the UF-TENG on the vibration behavior and output performance. It is demonstrated that the underwater electrical appliance can be powered by parallel UF-TENG units. The present UF-TENG is a more cost-effective and more accessible hydroelectric technology to utilize the renewable ocean current for powering sensors or micro electric appliances in Internet of Things.