非对称热阻对温差发电器性能的影响  

Influence of asymmetric thermal resistance on performance of thermoelectric generator

作　　者：王军[1] 李幸军 孟庆天 黄志强 WANG Jun;LI Xingjun;MENG Qingtian;HUANG Zhiqiang(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Department of Energy Technology,Aalborg University,Aalborg,Nordjylland 9220,Denmark)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]奥尔堡大学能源技术系,丹麦北日德兰州奥尔堡9220

出　　处：《江苏大学学报（自然科学版）》2023年第2期213-220,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51776090);江苏省高等学校自然科学研究重大项目(18KJA470001)。

摘　　要：为了优化温差发电器的热阻,并提升其性能,研究了温差发电器两端热阻不同时的输出性能变化.利用不同导热系数和厚度的外陶瓷基板,模拟了温差发电器两端热阻,分析了两端热阻相同与不同两种情况下,温差、开路电压、输出功率随热源温度和负载电阻的变化规律.研究结果表明:温差发电器两端热阻相同时,其温差和开路电压随热源温度的增加而增加;两端热阻不同时,其开路电压和最大输出功率随热源温度的增加而增加;随着负载电阻的增加,有效温差也逐渐增加,功率则呈先增加、后减少的趋势;以两端热阻相同时温差发电器的性能数据为基准值,热端采用较小热阻的陶瓷基板更有利于提升温差发电器性能,且在最大输出功率附近性能提升效果更为明显,开路电压、最大输出功率和有效温差最大值分别增加了0.64 V、0.87 W和24.5℃.To optimize the thermal resistance of thermoelectric generator for improving performance,the output performance variation of thermoelectric generator with different thermal resistance at both sides was investigated.The external ceramic substrates with different thermal conductivity and thickness were used to simulate the thermal resistance at both sides of thermoelectric generator.The variation of temperature difference,open-circuit voltage,output power and maximum output power of thermoelectric generator at different hot source temperatures and load resistances was analyzed.The results show that when the thermal resistance at both sides of the thermoelectric generator is the same,the temperature difference and the open-circuit voltage are increased with the increasing of hot source temperature.When the thermal resistance at both sides of thermoelectric generator is different,the open-circuit voltage and the maximum output power are increased with the increasing of hot source temperature.The effective temperature difference is increased with the increasing of load resistance,and the power is increased first with latter decreasing when the load resistance is increased.Compared to the performance of thermoelectric generator with the same thermal resistance at both sides,the ceramic substrate with smaller thermal resistance at the hot side is more beneficial to improve the output performance of thermoelectric generator,and the improvement effect is more obvious near the maximum power point.The open-circuit voltage,the maximum output power and the maximum effective temperature difference can be increased by 0.64 V,0.87 W and 24.5℃,respectively.

关 键 词：温差发电器 热阻 帕尔帖效应 性能优化 最大输出功率 

分 类 号：TM913[电气工程—电力电子与电力传动]