热电器件性能的权衡优化研究  

Study of the performance optimization of thermoelectric devices under the trade-off criteria

作　　者：白龙[1] 张荣[1] 张雷[1] 唐军[1] BAI Long;ZHANG Rong;ZHANG Lei;TANG Jun(School of Materials Science and Physics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《大学物理》2024年第6期36-39,共4页College Physics

基　　金：中国矿业大学物理学科研究生优秀课程建设项目(2022WLXK20);中国矿业大学教学改革重点项目(2021ZD08);中国矿业大学教学改革研究项目(2023ZDK05-208,2023ZX55)资助;教育部大学物理课程教学指导委员会教学改革项目(DWJZW202123hd)。

摘　　要：热电器件能够实现热能与电能的直接转换,在废热利用和发展洁净能源技术方面具有特殊优势,而增强热电器件的热力学性能更具有实践性意义.本文利用权衡优化方法(也称Ω判据)研究了热电器件的热力学特征,在构建权衡优化目标函数的基础上,得到了权衡优化判据下的效率和制冷系数表达式,详细阐释了热电品质因子对于效率和制冷系数的影响.与最大功率(最大制冷功率)方法进行比较,发现权衡优化下的热电器件容易实现热力学性能的提高.Thermoelectric devices can realize the direct conversion of heat and electric energy, and have special advantages in the utilization of waste heat and the development of clean energy technology. But, improving the thermodynamic performance of thermoelectric devices has the more practical significance. In this paper, the thermodynamic characteristics of thermoelectric devices are studied by means of trade-off optimization method (also called Ω criterion). On the basis of constructing a trade-off objective function, the expressions of efficiency and coefficient of performance (COP) under trade-off optimization criterion are obtained, and the influence of thermoelectric figure of merit on efficiency COP is explained in detail. In comparison with the maximum power (maximum cooling power) method, it is found that the thermodynamic performance of thermoelectric devices under the trade-off optimization can easily be improved.

关 键 词：热电器件 权衡优化判据 效率 制冷系数 

分 类 号：O414.1[理学—理论物理]