摘要
为研究半导体温差发电器的热电性能,利用有限元分析方法分别对由4对、12对和126对p/n结构成的3种温差发电模型进行热电耦合仿真模拟。分析负载电阻、温差、p-n结对数不同时,温差发电模型内阻、开路电压、路端电压、回路电流、功率及效率的变化规律。结果表明:温差发电模型内阻仅随p-n结对数的增大而线性增大,不受其他条件影响;开路电压、路端电压和回路电流均随p-n结对数和温差的增加而增大;功率和效率均随温差的增加而增大,当负载电阻与内阻相等时,温差发电模型的功率和效率最大。当温差由128℃增至218℃时,3种模型的最大功率分别由0.15、0.46和5.7 W增至0.44、1.33和16.5 W,126对模型的最大效率由2.4%增至4%。
In order to research the thermoelectric properties of thermoelectric generator,the finite element analysis method was used to simulate the thermoelectric coupling of three different thermoelectric generation models,which are composed of 4 pairs,12 pairs and 126 pairs of p-n junctions. Analysis the variety regulation of the resistance of thermoelectric generation model,open circuit voltage and the terminal voltage,loop current,power and efficiency when the load resistance,temperature difference and the pairs of p-n junctions are not set carved in stone. Results show that:The internal resistance of the thermoelectric generation model does not change with the variation of other conditions,which only with the pairs of p-n junctions increase linearly;open circuit voltage and the terminal voltage are with the pairs of p-n junctions and difference of temperature increase linearly,loop current and terminal voltage have similar relationships with temperature difference increase linearly;power and efficiency are with the increase of the difference in temperature increasing. Power and efficiency of the the rmoelectric generation model could reach the maximum value,when the temperature difference is constant,the load resistance is equal to the internal resistance of th ermoelectricpower generation model. When the temperature difference is increased from 128 ℃ to 218 ℃,the maximum power of the three models is increased by 0.15,0.46 and 0.44 to 5.7 W,1.33 and 16.5 W respectively. The maximum efficiency of the126 pairs model is increased from 2.4% to 4%.
作者
王军
张超震
董彦
李艺琳
赵琛
Wang Jun;Zhang Chaozhen;Dong Yan;Li Yilin;Zhao Chen(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第1期44-50,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51776090)
内燃机燃烧学国家重点实验室开放课题(K2018-05)
江苏省高等学校自然科学研究重大项目(18KJA470001)
江苏省"双创计划"
关键词
温差发电
转换效率
数值模拟
电压
电流
功率
thermoelectricity
conversion efficiency
numerical simulation
voltage
current
power
作者简介
通信作者:王军(1980-),男,博士、副教授,主要从事发动机热管理及排放污染物控制方面的研究。qcwjun@ujs.edu.cn.
