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Performance investigation and energy optimization of a thermoelectric generator for a mild hybrid vehicle

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  • Wang, Ruochen
  • Yu, Wei
  • Meng, Xiangpeng

Abstract

A thermoelectric generator (TEG) can effectively convert exhaust waste heat into electric energy without chemical reaction, which has favorable prospects for mild hybrid vehicle application. However, introduction of TEG into vehicle energy flow may drive the redesign of existing energy management strategy, the vehicle should be optimized by an amending mode transition strategy to accommodate the addition of the TEG. In this study, a novel TEG designed for a mild hybrid vehicle is proposed. The prototype is manufactured, and the electricity-generating capacity is tested by bench test. The net power of the TEG is modeled, and the parasitic power loss is analyzed. Considering the comprehensive influence of the TEG on the energy conservation and consumption of the vehicle, the optimal vehicle system efficiency is determined to achieve the refined mode transition strategy. Comparative analyses under different driving cycles are conducted to investigate the effectiveness of mode transition strategy and the performance of the TEG. The results indicate that the proposed mode transition strategy can increase both the average engine efficiency and the average exhaust temperature. Moreover, the fuel economy can be improved by 3.64% and 2.17%, depending on the driving cycles, along with a slight reduction in exhaust emissions.

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  • Wang, Ruochen & Yu, Wei & Meng, Xiangpeng, 2018. "Performance investigation and energy optimization of a thermoelectric generator for a mild hybrid vehicle," Energy, Elsevier, vol. 162(C), pages 1016-1028.
    • Handle: RePEc:eee:energy:v:162:y:2018:i:c:p:1016-1028
    DOI: 10.1016/j.energy.2018.08.103
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    References listed on IDEAS

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    6. Li, Lifu & Zhang, Zhongbo, 2019. "Investigation on steam direct injection in a natural gas engine for fuel savings," Energy, Elsevier, vol. 183(C), pages 958-970.
    7. Yu, Wei & Wang, Ruochen, 2019. "Development and performance evaluation of a comprehensive automotive energy recovery system with a refined energy management strategy," Energy, Elsevier, vol. 189(C).
    8. Zhao, Xiaohuan & Jiang, Jiang & Zuo, Hongyan & Mao, Zhengsong, 2023. "Performance analysis of diesel particulate filter thermoelectric conversion mobile energy storage system under engine conditions of low-speed and light-load," Energy, Elsevier, vol. 282(C).
    9. Ju O Kang & Sung Chul Kim, 2019. "Heat Transfer Characteristics of Heat Exchangers for Waste Heat Recovery from a Billet Casting Process," Energies, MDPI, vol. 12(14), pages 1-13, July.
    10. Luo, Ding & Wang, Ruochen & Yu, Wei & Zhou, Weiqi, 2020. "A numerical study on the performance of a converging thermoelectric generator system used for waste heat recovery," Applied Energy, Elsevier, vol. 270(C).
    11. Lan, Song & Stobart, Richard & Wang, Xiaonan, 2022. "Matching and optimization for a thermoelectric generator applied in an extended-range electric vehicle for waste heat recovery," Applied Energy, Elsevier, vol. 313(C).
    12. Luo, Ding & Wang, Ruochen & Yu, Wei & Zhou, Weiqi, 2019. "Performance evaluation of a novel thermoelectric module with BiSbTeSe-based material," Applied Energy, Elsevier, vol. 238(C), pages 1299-1311.
    13. Buchalik, Ryszard & Nowak, Grzegorz & Nowak, Iwona, 2021. "Mathematical model of a thermoelectric system based on steady- and rapid-state measurements," Applied Energy, Elsevier, vol. 293(C).
    14. Zhao, Yulong & Lu, Mingjie & Li, Yanzhe & Wang, Yulin & Ge, Minghui, 2023. "Numerical investigation of an exhaust thermoelectric generator with a perforated plate," Energy, Elsevier, vol. 263(PB).

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