尾气温差发电系统建模及影响规律分析  

Model for Thermoelectric-generator Based on Engine Exhaust Gas and Influencing Law Analysis

作　　者：马宗正 MA Zongzheng(School of Mechanical Engineering,Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院机械工程学院,郑州451191

出　　处：《机械科学与技术》2024年第2期351-357,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：河南省科技攻关项目(212102210332);河南省高等学校青年骨干教师资助计划(2014GGJS-120)。

摘　　要：为了能够利用温差发电技术对高温发动机尾气中蕴含的能量进行回收利用,建立了温差发电系统能量计算方程,在基于实验结果验证的基础上对影响温差发电系统输出功率的系统参数及其规律进行了研究。结果表明,随着外部负载的增加,输出功率呈现先增加后下降的趋势;塞贝克系数的影响规律基本一致,输出功率也呈现先增加后降低的趋势;内阻值与输出功率呈类二次方关系,随着内阻值的增大,输出功率降低;导热系数的变化对于温差发电输出功率影响较大,当导热系数变大后,输出功率降低;冷热端散热系数对温差发电模块输出功率的影响基本一致,输出功率随散热系数的增加而增加。In order to recover and utilize the energy of engine exhaust gas with high temperature based on thermoelectric generation technology,the influencing factors of the thermoelectric generator system and the influencing laws of output power were studied based on the validation of equation with the compassion of experimental and simulation results.The simulation results show that the output power increases firstly and decreases with the increasing of external load.The influencing law of See-beck coefficient is basically the same as the external load which shows a trend of increasing first and then decreasing.The relation between the internal resistance and the output power is quasi-quadratic,and the output power decreases with the increasing of internal resistance.The change in thermal conductivity of the thermoelectric generation module has a great effect on the output power.When the thermal conductivity becomes larger,the output power decreases and when the thermal conductivity increases from 0.01 to 0.9,the output power decreases by 80%.The effect of the heat dissipation coefficient of the hot and cold ends on the output power is basically the same which is that the output power increases with the increasing of heat dissipation coefficient.

关 键 词：温差发电 输出功率 影响因素 影响规律 发动机尾气 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]