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Modelling and comprehensive analysis of TEGs with diverse variable leg geometry

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  • Ibeagwu, Onyebuchi Isreal

Abstract

Exhaustive numerical modelling and performance evaluation of numerous forms of variable thermoelectric legs were performed and critically examined under a steady state condition. The study encompasses geometries such as rect-leg, trap-leg, Y-leg, I-leg and X-leg depending on their respective shape structures. From the study, variable cross sectional inclusion was found to influence the performance of the convectional rect-leg significantly, such that the X-leg generated about 19.13% more power density than the convectional geometry (i.e. the rectangular leg) and relatively most efficient amidst all configurations. However, the Fourier conduction heat was seen to be the major contributor to the system irreversibilities in comparison to Thomson and Joule heating. In addition, the X-leg appear to have the highest generated entropy density in all conceptual models. The newly introduced geometry experienced lower thermal stresses than the conventional models, while the Y-leg and Trap-leg would possibly fail structurally before other models. Therefore, this study and executed simulation results can be utilized as effective and feasible reference for designing thermoelectric modules with diverse kinds of variable leg geometry.

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  • Ibeagwu, Onyebuchi Isreal, 2019. "Modelling and comprehensive analysis of TEGs with diverse variable leg geometry," Energy, Elsevier, vol. 180(C), pages 90-106.
    • Handle: RePEc:eee:energy:v:180:y:2019:i:c:p:90-106
    DOI: 10.1016/j.energy.2019.05.088
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    References listed on IDEAS

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    2. Wang, Xuejian & Qi, Ji & Deng, Wei & Li, Gongping & Gao, Xudong & He, Luanxuan & Zhang, Shixu, 2021. "An optimized design approach concerning thermoelectric generators with frustum-shaped legs based on three-dimensional multiphysics model," Energy, Elsevier, vol. 233(C).
    3. Khalil, ALkhadher & Elhassnaoui, Ahmed & Yadir, Said & Abdellatif, Obbadi & Errami, Youssef & Sahnoun, Smail, 2021. "Performance comparison of TEGs for diverse variable leg geometry with the same leg volume," Energy, Elsevier, vol. 224(C).
    4. Junpeng Liu & Yajing Sun & Gang Chen & Pengcheng Zhai, 2023. "Performance Analysis of Variable Cross-Section TEGs under Constant Heat Flux Conditions," Energies, MDPI, vol. 16(11), pages 1-16, June.
    5. Chika Maduabuchi & Hassan Fagehi & Ibrahim Alatawi & Mohammad Alkhedher, 2022. "Predicting the Optimal Performance of a Concentrated Solar Segmented Variable Leg Thermoelectric Generator Using Neural Networks," Energies, MDPI, vol. 15(16), pages 1-25, August.
    6. Maduabuchi, Chika & Eneh, Chibuoke & Alrobaian, Abdulrahman Abdullah & Alkhedher, Mohammad, 2023. "Deep neural networks for quick and precise geometry optimization of segmented thermoelectric generators," Energy, Elsevier, vol. 263(PC).
    7. Wang, Xue & Wang, Hongchao & Su, Wenbing & Chen, Tingting & Tan, Chang & Madre, María A. & Sotelo, Andres & Wang, Chunlei, 2022. "U-type unileg thermoelectric module: A novel structure for high-temperature application with long lifespan," Energy, Elsevier, vol. 238(PB).
    8. Ye-Qi Zhang & Jiao Sun & Guang-Xu Wang & Tian-Hu Wang, 2022. "Advantage of a Thermoelectric Generator with Hybridization of Segmented Materials and Irregularly Variable Cross-Section Design," Energies, MDPI, vol. 15(8), pages 1-18, April.
    9. Shittu, Samson & Li, Guiqiang & Xuan, Qindong & Zhao, Xudong & Ma, Xiaoli & Cui, Yu, 2020. "Electrical and mechanical analysis of a segmented solar thermoelectric generator under non-uniform heat flux," Energy, Elsevier, vol. 199(C).
    10. Shittu, Samson & Li, Guiqiang & Zhao, Xudong & Ma, Xiaoli, 2020. "Review of thermoelectric geometry and structure optimization for performance enhancement," Applied Energy, Elsevier, vol. 268(C).
    11. Chen, Wei-Hsin & Chiou, Yi-Bin, 2020. "Geometry design for maximizing output power of segmented skutterudite thermoelectric generator by evolutionary computation," Applied Energy, Elsevier, vol. 274(C).
    12. Zou, Wen-Jiang & Shen, Kun-Yang & Jung, Seunghun & Kim, Young-Bae, 2021. "Application of thermoelectric devices in performance optimization of a domestic PEMFC-based CHP system," Energy, Elsevier, vol. 229(C).
    13. Kong, Li & Yu, Jia & Zhu, Hongji & Zhu, Qingshan & Yan, Qing, 2022. "Effect of three parameters of the periodic rectangular pulsed heat flux on the electrical performance improvement to a thermoelectric generator," Energy, Elsevier, vol. 261(PA).
    14. 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.
    15. Yin, Tao & Li, Zhen-Ming & Peng, Peng & Liu, Wei & Shao, Yu-Ying & He, Zhi-Zhu, 2021. "Performance analysis and design optimization of a compact thermoelectric generator with T-Shaped configuration," Energy, Elsevier, vol. 229(C).

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