| 摘要: |
| 目前对多级热电制冷器的研究较少，且对制冷性能的报导尚不统一。为研究多级热电制冷器的确切性能，本文利用商用热电材料的物性参数，建立了一级至六级热电制冷器的多物理场耦合仿真模型，并通过实验验证了模型的准确性。然后从多级热电制冷器的设计角度出发，研究了外部驱动电路及内部结构参数对其制冷性能的影响。结果表明：在热端为27 ℃时，六级热电制冷器在电串联、电并联和独立电源驱动电路下可分别获得113.32、71.84和129.78 ℃的最大制冷温差。进一步探究了不同驱动电路的最佳应用场合，分析了不同驱动电路下多级热电制冷器的制冷性能出现差距的原因。并以六级热电制冷器为例，研究了各层级热电臂的高度的影响，结果表明最高层级的臂高是最主要的影响因素。 |
| 关键词: 热电制冷 仿真模型 驱动电路 热电臂高度 制冷性能 |
| DOI： |
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| 基金项目:国家自然科学基金(52176007);深圳市科技计划基础研究项目(JCYJ2021032
4115611030) |
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| Analysis of the Refrigeration Performance and Main Influencing Factors of Multi-stage Thermoelectric Coolers |
|
Niu Bingxuan1, Liu Zhijie1, Liu Zeyu1, Shen Limei1,2, Chen Huanxin1
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| (1.School of Energy and Power Engineering, Huazhong University of Science and Technology;2.Shenzhen Huazhong University of Science and Technology Research Institute) |
| Abstract: |
| At present, only a few studies on multi-stage thermoelectric coolers are available, and reports on the cooling performance of such coolers are not consistent. To study the performance of multi-stage thermoelectric coolers, a multi-physics simulation model of single-stage to six-stage thermoelectric coolers is developed based on the physical parameters of commercial-grade thermoelectric materials in this study, and the accuracy of the model is verified experimentally. In terms of the design of the multi-stage thermoelectric cooler, the influences of the external drive circuit and internal structural parameters on its cooling performance are studied. The results show that when the hot end is 27 °C, the six-stage thermoelectric cooler can obtain the maximum cooling temperature difference of 113.32 °C, 71.84 °C, and 129.78 °C using the electrical series, electrical parallel, and independent power drive circuits, respectively. The optimal applications of different driving circuits are further explored, and the causes for the differences in the cooling performance of the multi-stage thermoelectric coolers under different driving circuits are analyzed. A six-stage thermoelectric cooler is taken as an example, and the influence of the thermoelectric leg height of each stage is explored. The results show that the leg height of the highest stage is the most important factor. |
| Key words: thermoelectric refrigeration simulation model drive circuit thermoelectric leg height refrigeration performance |
