Investigation of thermal radiation effects on thermoelectric module performance by an improved model
Investigation of thermal radiation effects on thermoelectric module performance by an improved model
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通过改进模型研究热辐射对热电模块性能的影响
DOI：
10.1016/j.jpowsour.2020.228713
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发表时间：
2020-11
影响因子：
9.2
通讯作者：
Gao Peng
中科院分区：
文献类型：
--
作者：
Cai Lanlan;Li Peng;Luo Qi;Yan Han;Zhai Pengcheng;Gao Peng
热电模块（tem）在高温条件下工作时，热辐射有可能显著影响其性能。为了准确地研究热辐射对TEM性能的影响，本文建立了一种改进的三维热电耦合模型。在改进的模型中，包括热电腿、基板和电极的所有暴露表面上的辐射热损失。这些热损失在以前的TEM模型中被忽略或不完全考虑。改进的模型与现有的实验和数值结果进行了验证。然后，分析了热结温度、表面发射率、TEM的几何形状和结构对辐射热损失引起的性能变化的影响。结果表明，为了准确估计TEM在高温下的性能，基片表面和TE支腿表面的热辐射都不能忽略。热辐射对圆柱透射电镜效率的影响大于矩形透射电镜效率。随着支腿长度和支腿间距的增加以及支腿截面积的减小，热辐射对TEM性能的影响更为严重。在研究的情况下，由于辐射热损失导致的转换效率下降高达52.7%。
Thermal radiation in thermoelectric modules (TEMs) has the potential to significantly affect their performance when they operate under high-temperature conditions. Here, to accurately investigate the thermal radiation effects on TEM performance, an improved 3D thermal-electric coupled model is developed. The radiative heat losses, which occur on all the exposed surfaces of thermoelectric legs, substrates, and electrodes in TEMs, are included in the improved model. These heat losses are ignored or considered incompletely in the previous TEM models. The improved model is validated against available experimental and numerical results. Then, effects of the hot-junction temperature, surface emissivity, the geometries, and configuration of TEM on the performance variation caused by radiative heat losses are analyzed. Results reveal that neither the thermal radiation via the substrates' surfaces nor that via the TE legs’ surfaces can be neglected to accurately estimate the performance of TEM with high temperature. Thermal radiation has a greater effect on the efficiency of cylindrical-TEM than that of rectangular-TEM. The thermal radiation effect on TEM performance becomes more severe with increasing length and leg separation along with decreasing leg cross-sectional area. The decrement of conversion efficiency due to radiation heat losses is as high as 52.7% for the studied cases.
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影响因子：
11.2
作者：
Xingyu Liang;Xiuxiu Sun;H. Tian;G. Shu;Yuesen Wang;Xu Wang
通讯作者：
Xingyu Liang;Xiuxiu Sun;H. Tian;G. Shu;Yuesen Wang;Xu Wang
影响因子：
6.2
作者：
Degang Zhao;C. Tian;Shouqiu Tang;Yun-teng Liu;Lidong Chen
通讯作者：
Degang Zhao;C. Tian;Shouqiu Tang;Yun-teng Liu;Lidong Chen
影响因子：
64.8
作者：
Biswas, Kanishka;He, Jiaqing;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
影响因子：
64.8
作者：
Zhao, Li-Dong;Lo, Shih-Han;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
影响因子：
9.4
作者：
Rogl, G.;Grytsiv, A.;Eibl, O.
通讯作者：
Eibl, O.