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Research on the power generation performance and optimization of thermoelectric generators for recycling remaining cold energy

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  • Cui, Xiangna
  • Chen, Xi
  • Gao, Zhongyang

Abstract

Compared with extensive research on the power generation of thermoelectric generators (TEGs) under medium-high temperatures, research on power generation for cold energy utilization is still limited. To study the performance and feasibility of low-temperature power generation, this paper combines simulation and experiments for research. Firstly, a simulation model based on actual material parameters is established. Then, a thermoelectric low-temperature power generation experimental platform is established to conduct experimental research on TEG in different temperature zones and temperature differences and compared with simulation results. Finally, optimization research is conducted by changing thermoelectric materials and structures. The research results indicate that the maximum errors between the dates of simulation and experiment in terms of output voltage, conversion efficiency, and exergy efficiency are 11.3 %, 10.57 %, and 10.57 %, respectively. Compared with Bi2Te3, the output voltage, conversion efficiency, and exergy efficiency of CsBi4Te6 are improved by 21.95 %, 34.64 %, and 34.64 %, respectively. The maximum output power and conversion efficiency are linearly related to the output current. The performance is optimal when the thermoelectric unit height is 1.0 mm and the side length is 1.6 mm. This proves the feasibility of TEG application at low temperatures and lays the foundation for low-temperature power generation.

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  • Cui, Xiangna & Chen, Xi & Gao, Zhongyang, 2024. "Research on the power generation performance and optimization of thermoelectric generators for recycling remaining cold energy," Energy, Elsevier, vol. 299(C).
    • Handle: RePEc:eee:energy:v:299:y:2024:i:c:s0360544224011952
    DOI: 10.1016/j.energy.2024.131422
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