| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Transient Cooling Law of Thermoelectric Cooler Based on Bismuth Telluride |
| YANG Shiguan1,2, CHEN Shuquan3, WANG Jian3,4, HE Junsong1,2, CHENG Lin1,2, ZHAI Lijun1,2, LIU Hongxia1,2, ZHANG Yan1,2, SUN Zhigang1,2,3,*
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1 College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2 Key Laboratory of Magnetoelectric Functional Materials and Applications, Taiyuan University of Science and Technology, Taiyuan 030024, China
3 State Key Laboratory of New Material Composite Technology, Wuhan University of Technology, Wuhan 430070, China
4 Hubei Longzhong Laboratory, Xiangyang Demonstration Area, Wuhan University of Technology, Xiangyang 441000, Hubei, China |
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Abstract A program to increase the transient cooling temperature of a thermoelectric cooler based on phase change material and pulse current was proposed. The heat sink end of the cooler was designed as a fin-sheath structure, filled with phase change material and with holes at the bottom, the phase change material absorbed heat and melted and flowed out from the bottom, and the thermoelectric coolerworked continuously by adding phase change material to the heat sink through program control. We established a three-dimensional heat transfer model of the thermoelectric cooler device, and investigated the effects of pulse current waveform, pulse width, pulse ratio, and the presence or absence of phase change material on the thermoelectric cooling performance. The results showed that in the absence of phase change material, the pulsed current enabled the thermoelectric cooler to achieve a lower cooling temperature compared with the constant current, with the minimum temperature at the cold end significantly reduced from -6.30 ℃ to -14.01 ℃. In the presence of a phase change material, the minimum temperature at the cold end was further reduced from -14.01 ℃ to -17.74 ℃, and the subcooling area was improved by 48.43%. It is shown that the square pulse has the optimum cooling temperature and subcooling area. When the square pulse width was 26 s and the pulse ratio was 2.5, the minimum cooling temperature at the cold side reached -17.74 ℃. When the pulse ratio is further increased, the cooling temperature of the thermoelectric cooler is further reduced due to the increased temperature difference between the hot and cold sides. When the pulse width increases, the subcooling area becomes larger and both the cooling temperature and the cooling coefficient decrease.
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Published: 25 March 2025
Online: 2025-03-24
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2025, Vol. 39 
