焊料层对热电制冷器性能的影响分析  

Influence of solder layer on performance of thermoelectric cooler

作　　者：张启[1] 李成[1] 张景双[1] Zhang Qi;Li Cheng;Zhang Jingshuang(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001

出　　处：《低温与超导》2022年第4期88-94,共7页Cryogenics and Superconductivity

基　　金：郑州市协同创新重大专项(18XTZX12005)资助。

摘　　要：热电制冷器广泛应用于热电制冷和热电发电等领域。建立了热电制冷器热电性能的三维有限元模型,进行多物理场耦合计算,考虑热电材料对温度的依赖性,对两种型号的热电制冷器中焊料层部分的结构尺寸进行了不同工况下的研究分析,对比不同焊料厚度和截面边长对热电制冷器最大温差及热电转换效率的影响。结果表明,焊料层截面边长和厚度对热电制冷器的最大温差影响显著,截面边长为热电壁尺寸的0.95~1.007 86范围内热电制冷器的最大温差能提升10 K,并且在0.970 59~0.975范围内达到最佳;厚度为0.08~0.093 3 mm时既能满足经济性又能使热电制冷器的最大温差提高13 K。Thermoelectric coolers are widely used in thermoelectric refrigeration and thermoelectric power generation. A 3 D finite element model of performance of thermoelectric coolers was established, multiple physical field coupling calculation was conducted, the structure size of solder layer in two kinds of models of thermoelectric coolers under different working conditions was analyzed based on the temperature dependence of thermoelectric materials.The effects of the solder thickness and cross section length on thermoelectric cooler’s maximum temperature difference and thermo-to-electric conversion efficiency were compared. The results show that the sectional length and thickness of solder layer have significant effects on the maximum temperature difference of thermoelectric coolers. The maximum temperature difference of thermoelectric refrigerator can be increased by 10 K in the range of 0.95~1.007 86 of thermoelectric wall size, and reaches the best value in the range of 0.970 59~0.975. When the thickness is 0.08~0.093 3 mm, the maximum temperature difference of thermoelectric cooler can be increased by 13 K.

关 键 词：热电制冷 焊料层 工作电流 最优性能 

分 类 号：TB619.2[一般工业技术—制冷工程]