摘要
发展海洋能源转化技术是优化能源结构、拓展“蓝色经济”空间的战略要求。为此,设计了一种基于筏式波浪能转换和点头鸭型摩擦纳米发电机能量输出的耦合系统,并对影响系统中筏体装置部分捕能特性的压载吃水、筏体尺寸参数以及影响系统输出电势分布的尼龙球径、滚动距离参数进行了仿真分析。结果表明:增大筏体装置的吃水(增加压载)和优化筏体装置的尺寸都可以降低装置的固有频率,使其与波浪频率达到共振,从而可以提高装置捕获波浪能的能力;摩擦纳米发电机两电极之间的电势差随着尼龙球球径的增大呈现出先增大后减小的趋势,在球径为30 mm时电势差达到最大值,该电势差还随着尼龙球滚动距离的增大而增大,并在外部负载电阻为770 MΩ时实现了瞬时最大功率密度3.7W/m^(3)。由此可见,当在筏式波浪能转换装置中布置多个摩擦纳米发电机阵列时,完全可以将海洋中原本无法利用的大量低频波浪能转化为电能,从而满足深海传感器网络供电需求,这大大扩展了波浪能的发电潜力,使得蓝色能源在未来有望得到更有效地开发。
Developing marine energy conversion technology is a strategic requirement to optimize the energy structure and expand the space of“blue economy”.To this end,a coupled system based on raft-type device for wave energy conversion and nodding duck-type triboelectric nanogenerator for energy output was designed,and the parameters affecting the energy trapping characteristics of the raft device part of the system,such as ballast draft,raft size parameters,and parameters affecting the output potential distribution of the system,such as nylon ball diameter and rolling distance,were simulated and analyzed.The results showed that the intrinsic frequency of the device was reduced both by increasing the draft of the raft device(increasing ballast)and optimizing the size of the raft device to resonate with the wave frequency,thus the ability of the device to capture wave energy was improved.The potential difference between the two electrodes of the triboelectric nanogenerator showed a trend of increased and then decreased with the increase of the ball diameter of the nylon ball,and the potential difference reached the maximum value at the ball diameter of 30 mm.This potential difference also increased with the rolling distance of the nylon ball,and the maximum instantaneous power density of 3.7 W/m^(3)was achieved when the external load resistance was 770 MΩ.Thus,when multiple triboelectric nanogenerators were arranged in the raft-type wave energy conversion device,it was possible to convert a large amount of low-frequency wave energy,which was not available in the ocean,into electrical energy to meet the power supply demand of the deep-sea sensor network.This greatly expands the power generation potential of wave energy and makes it possible to exploit blue energy more effectively in the future.
作者
梁娜
苗成旭
崔慧
王建伟
杨希娅
LIANG Na;MIAO Cheng-xu;CUI Hui;WANG Jian-wei;YANG Xi-ya(School of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;Institute of New Energy Technology,School of Information Science and Technology,JiNan University,Guangzhou 510632,China)
出处
《新能源进展》
2022年第3期265-270,共6页
Advances in New and Renewable Energy
基金
国家自然科学基金项目(62004083)
广东省自然科学基金项目(2020A1515011123)。
关键词
波浪能转换器
摩擦纳米发电机
结构设计
波浪能收集
wave energy converter
triboelectric nanogenerator
structure design
wave energy harvesting
作者简介
梁娜(1994-),女,硕士研究生,主要从事基于摩擦纳米发电机波浪能发电等新能源研究;通信作者:王建伟(1972-),男,博士,副教授,主要从事可再生能源的开发与利用等方面的研究,E-mail:skd993920@sdust.edu.cn。
