汽车温差发电系统的多物理场建模分析与试验  

Multi-physics field modeling analysis and experiment of automotive thermoelectric generator system

作　　者：汪若尘[1] 陈杰 罗丁 孙泽宇[1] 周卫琪[2] WANG Ruochen;CHEN Jie;LUO Ding;SUN Zeyu;ZHOU Weiqi(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Automotive Engineering Research Institute,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]江苏大学汽车工程研究院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2023年第5期517-523,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51977100)。

摘　　要：为了得到沿尾气流动方向汽车温差发电系统各温差发电片之间的温度分布差异,建立了汽车温差发电系统的流热电多物理场数学模型,该模型充分考虑了尾气流动和热电材料的温度依变性.分析了尾气温度和流量对温度分布差异的影响,并进行了汽车温差发电系统台架试验.结果表明:尾气温度的增加会加剧尾气流动方向系统各区域温差发电片之间的温度分布差异,当尾气温度从450 K增加到600 K时,差异相对增加105%;尾气流量的增加有益于减小温度分布差异,相比之下尾气温度是影响温度分布差异的主要因素;该多物理场数学模型计算精度可达97%.To obtain the temperature distribution difference between the thermoelectric modules(TEMs)of automotive thermoelectric generator(ATEG)system along the exhaust flow direction,a flow-thermoelectric multi-physics field model was established with considering the exhaust flow and the temperature dependence of thermoelectric material properties.The influence of exhaust temperature and flowrate on the temperature distribution difference was analyzed,and the bench test of ATEG system was performed.The results show that the increasing of exhaust temperature can aggravate the temperature distribution difference between TEMs along exhaust flow direction.When the exhaust temperature is increased from 450 K to 600 K,the relative temperature distribution difference is increased by 105%.The increasing of exhaust flowrate is beneficial to reduce the temperature distribution difference,while the exhaust temperature is the main influence factor on the temperature distribution difference.The accuracy of the multi-physics field mathematical model can reach 97%.

关 键 词：汽车温差发电系统 尾气废热回收 数学模型 温度分布差异 台架试验 

分 类 号：U463.6[机械工程—车辆工程] TK11[交通运输工程—载运工具运用工程]