| 摘要: |
| 利用热电发电器（TEG）进行温差发电是LNG冷能利用的方式之一，而目前低温下热电材料塞贝克系数（α）研究的缺失给低温TEG的设计带来了障碍。因此，本文提出一种通过TEG模块的实验得到低温下该模块所用热电材料α的测量方法，并测试了热电材料Bi2Te3在90~180 K温度范围内的α。结果表明：Bi2Te3在低温下的α随温度的降低而减小，温度从180 K降至90 K，塞贝克系数从124.6 μV/K降至49.3 μV/K，且与温度成二次函数关系。 |
| 关键词: 塞贝克系数 低温 热电模块 热阻网络 |
| DOI： |
| Received:November 10, 2021Revised:January 17, 2022 |
| 基金项目:国家重点研发计划（2017YFE0198000）资助项目。 |
|
| Measurement of Seebeck Coefficient at Cryogenic Temperature Based on Thermoelectric Module Experiments |
|
Liu Zhibo, Li Jiamei, Wang Shixue, Zhu Yu
|
| (School of Mechanical Engineering, Tianjin University) |
| Abstract: |
| Thermoelectric generators (TEG) are one way to utilize the cold energy of LNG. Inadequate research on the Seebeck coefficient (α) of thermoelectric materials at cryogenic temperatures has hindered the design of TEG at cryogenic temperatures. Consequently, this paper proposes a method to measure α of the thermoelectric material, Bi2Te3, at cryogenic temperatures using a TEG module experiment, which measures α of thermoelectric materials in the temperature range of 90 K to 180 K. The results showed that α of Bi2Te3 decreased with decreasing temperature. When the temperature decreased from 180 K to 90 K, α decreased from 124.6 μV/K to 49.3 μV/K, which is a quadratic function of temperature. |
| Key words: Seebeck coefficient cryogenic temperature thermoelectric module thermal resistance network |
