热声驱动液态金属基摩擦纳米发电机研究  

Investigation on the Thermoacoustically Driven Liquid-Metal-Based Triboelectric Nanogenerator

作　　者：朱顺敏 余国瑶[1] 唐伟[3] 胡剑英[1] 戴巍[1] 罗二仓[1] ZHU Shun-Min;YU Guo-Yao;TANG Wei;HU Jian-Ying;DAI Wei;LUO Er-Cang(Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 100083,China)

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院大中国科学院北京纳米能源与系统研究所,北京100083

出　　处：《工程热物理学报》2020年第10期2365-2371,共7页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2016YFB0901403);国防科技创新特区项目。

摘　　要：热声发电技术作为一种新型的热发电技术,具有可靠性高、效率高、环境友好等优点。2017年本课题组首次提出并验证了"热声驱动摩擦纳米发电机"这一热-声-电换能新流程,为探索新的具有高可靠性、低成本、结构简单且高效的声电转换方式提供了新思路.为进一步提高热声驱动摩擦纳米发电机的输出电压和功率,本文提出并研究了滑动式液态金属基摩擦纳米发电机与气-液谐振驻波热声发动机耦合新构型,并理论计算了气-液谐振驻波热声发动机的工作特性以及滑动式液态金属基摩擦纳米发电机的输出特性。计算结果显示,液态金属液柱的引入可以显著降低热声发动机的谐振频率并提高热声发动机的压力波动振幅,这有利于提高热声驱动摩擦纳米发电机的输出电压和功率。当使用GaIn24.5作为液态金属工质时,单个液态金属基摩擦纳米发电机的开路电压可达到237 V,峰值输出功率可达到23.7μW。As a novel heat-to-electrical conversion technology,thermoacoustic power generation technology possess advantages of high reliability,high conversion efficiency and environmental friendliness.In 2017,our group firstly proposed and demonstrated thermoacoustically driven triboelectric nanogenerator(TA-TENG),a new conversion process for heat to acoustic and then to electrical,which provides new idea for searching new acoustic-electric conversion device with high reliability,low cost,simple structure and high conversion efficiency.In order to further improving voltage and output power of the TA-TENG,this work proposed and investigated a new coupling configuration of a liquid-metal-based sliding-mode triboelectric nanogenerator and a standing-wave thermoacoustic engine with gas-liquid coupling oscillation.In addition,the operating characteristics of the standingwave thermoacoustic engine with gas-liquid coupling oscillation were theoretically calculated,and the theoretical output performance of the liquid-metal-based triboelectric nanogenerator(LM-TENG)was also evaluated.The results show that the use of liquid metal column can significantly decrease the resonance frequency of the thermoacoustic engine and increase the pressure amplitude of the thermoacoustic engine,which is beneficial to improve the voltage and power output of the TA-TENG.When using GaIn24.5 alloy,the open-circuit voltage of a single LM-TENG can reach 237 V,and the peak output power can reach 23.7μW.

关 键 词：热声发动机 气-液谐振 驻波 摩擦纳米发电机 液态金属 

分 类 号：TM31[电气工程—电机] TK05[动力工程及工程热物理]