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Improvement of transient supercooling of thermoelectric coolers through variable semiconductor cross-section

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  • Lv, Hao
  • Wang, Xiao-Dong
  • Wang, Tian-Hu
  • Cheng, Chin-Hsiang

Abstract

In this work, a new design of thermoelectric cooler (TEC) with variable semiconductor cross-sectional area is proposed to improve its transient supercooling characteristics. Four key evaluation indicators of transient supercooling for the conventional and new designs, including the minimum cold end temperature, maximum temperature overshoot, holding time of transient state, and recovery time ready for next steady-state, are examined and compared by a three-dimensional, transient, and multiphysics model. Two additional effects are observed in the TEC with variable semiconductor cross-sectional area. First, the variable cross-sectional area makes the thermal circuit asymmetric, so that Joule heat is preferentially conducted toward to the end with a larger cross-sectional area. Second, more Joule heat is produced close to the end with a smaller cross-sectional area. The present simulations find that these two effects can be utilized to achieve the desired evaluation indicators by changing the cross-sectional area ratio of hot end to cold end. When a lower cold end temperature, a smaller temperature overshoot, and/or a longer holding time are/is required, a larger cross-sectional area at the cold end is recommended. However, to achieve a shorter recovery time, a smaller cross-sectional area at the cold end is needed.

Suggested Citation

  • Lv, Hao & Wang, Xiao-Dong & Wang, Tian-Hu & Cheng, Chin-Hsiang, 2016. "Improvement of transient supercooling of thermoelectric coolers through variable semiconductor cross-section," Applied Energy, Elsevier, vol. 164(C), pages 501-508.
    • Handle: RePEc:eee:appene:v:164:y:2016:i:c:p:501-508
    DOI: 10.1016/j.apenergy.2015.11.068
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    References listed on IDEAS

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    Cited by:

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    2. Lv, Hao & Wang, Xiao-Dong & Meng, Jing-Hui & Wang, Tian-Hu & Yan, Wei-Mon, 2016. "Enhancement of maximum temperature drop across thermoelectric cooler through two-stage design and transient supercooling effect," Applied Energy, Elsevier, vol. 175(C), pages 285-292.
    3. Meng, Jing-Hui & Wu, Hao-Chi & Gao, De-Yang & Kai, Zhang & Lu, Gui & Yan, Wei-Mon, 2021. "A novel super-cooling enhancement method for a two-stage thermoelectric cooler using integrated triangular-square current pulses," Energy, Elsevier, vol. 217(C).
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    5. Tianbo Lu & Yuqiang Li & Jianxin Zhang & Pingfan Ning & Pingjuan Niu, 2020. "Cooling and Mechanical Performance Analysis of a Trapezoidal Thermoelectric Cooler with Variable Cross-Section," Energies, MDPI, vol. 13(22), pages 1-19, November.

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