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Simultaneous optimization of cooling temperature difference and efficiency for multi-stage thermoelectric device

Author

Listed:
  • Zhao, Linghao
  • Liu, Duo
  • Feng, Jianghe
  • Min, Erbiao
  • Li, Juan
  • Ling, Yifeng
  • Li, Hao
  • Zhao, Degang
  • Liu, Ruiheng
  • Sun, Rong

Abstract

Cascaded multi-stage thermoelectric coolers (multi-TEC) have been proven to be an effective technology to achieve ultra-low temperature refrigeration. Although much theoretical research on multi-TEC has been carried out, how to fabricate a high-performance multi-TEC based on the reported thermoelectric materials is still not clear. In this work, we proposed a paradigm to design the geometry of a multi-TEC device to maximize the cooling efficiency (COP) and cooling temperature difference (ΔT) by aligning the current for the maximum COP of each stage. This design not only achieves the same ΔT compared with aligning the current for maximum Qc of each stage but also a great improvement of COP and power saving. The corresponding multi-TEC devices were also successfully fabricated, producing the high ΔTs of 108.6 K and 126.8 K for three- and four-stage devices, respectively, which deviate no more than 5% from the simulated results. Furthermore, the Bi2Te3-based five-stage device was predicted to achieve a ΔTmax of 146.3 K at 300 K by this methodology, which can be further increased to 161.5 K by the utilization of heterogeneous low-temperature thermoelectric materials, breaking through the high-record cooling temperature of multi-TEC. Therefore, this paradigm can be widely applied in the practical design and fabrication of multi-TEC.

Suggested Citation

  • Zhao, Linghao & Liu, Duo & Feng, Jianghe & Min, Erbiao & Li, Juan & Ling, Yifeng & Li, Hao & Zhao, Degang & Liu, Ruiheng & Sun, Rong, 2024. "Simultaneous optimization of cooling temperature difference and efficiency for multi-stage thermoelectric device," Applied Energy, Elsevier, vol. 373(C).
    • Handle: RePEc:eee:appene:v:373:y:2024:i:c:s0306261924012613
    DOI: 10.1016/j.apenergy.2024.123878
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    References listed on IDEAS

    as
    1. Sajid, Muhammad & Hassan, Ibrahim & Rahman, Aziz, 2017. "An overview of cooling of thermoelectric devices," Renewable and Sustainable Energy Reviews, Elsevier, vol. 78(C), pages 15-22.
    2. Wang, Tian-Hu & Wang, Qiu-Hong & Leng, Chuan & Wang, Xiao-Dong, 2015. "Parameter analysis and optimal design for two-stage thermoelectric cooler," Applied Energy, Elsevier, vol. 154(C), pages 1-12.
    3. 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.
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