Thermal Stress Analysis and Structure Parameter Selection for a Bi2Te3-Based Thermoelectric Module
Thermal Stress Analysis and Structure Parameter Selection for a Bi2Te3-Based Thermoelectric Module
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DOI：
10.1007/s11664-011-1611-3
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发表时间：
2011-03
影响因子：
2.1
通讯作者：
Junling Gao;Q. Du;Xiao-Dan Zhang;Xin-Qiang Jiang
中科院分区：
文献类型：
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作者：
Junling Gao;Q. Du;Xiao-Dan Zhang;Xin-Qiang Jiang
热电模块（TEM）的输出功率和转换效率主要由其材料性质决定，即，塞贝克系数、电阻率和热导率。在实际应用中，由于恶劣环境的影响，还应考虑TEM的力学性能。利用ANSYS软件中的有限元分析（FEA）模型，基于热压材料的各向异性力学性能和热电性能，给出了TEM的热应力分布。通过分析Bi_2Te_3基热电材料解理面沿着损伤的可能性，优化结构参数，获得了力学性能较好的TEM。从而为提高TEM的抗热应力性能指明了方向。
The output power and conversion efficiency of thermoelectric modules (TEMs) are mainly determined by their material properties, i.e., Seebeck coefficient, electrical resistivity, and thermal conductivity. In practical applications, due to the influence of the harsh environment, the mechanical properties of TEMs should also be considered. Using the finite-element analysis (FEA) model in ANSYS software, we present the thermal stress distribution of a TEM based on the anisotropic mechanical properties and thermoelectric properties of hot-pressed materials. By analyzing the possibilities of damage along the cleavage plane of Bi2Te3-based thermoelectric materials and by optimizing the structure parameters, a TEM with better mechanical performance is obtained. Thus, a direction for improving the thermal stress resistance of TEMs is presented.