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Design optimization of oil pan thermoelectric generator to recover waste heat from internal combustion engines

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  • Aljaghtham, Mutabe
  • Celik, Emrah

Abstract

Nearly 75% of fuel energy is rejected to the environment and ultimately becomes waste heat in motor vehicles. To recover some of this waste heat and enhance fuel efficiency, thermoelectric energy generators (TEGs) possess high potential. We investigated the feasibility of utilizing TEGs in terms of oil pans to recover waste heat generated in internal combustion engines. Hot oil at the top surface of TEG and air cooling at the bottom create a high thermal gradient for the thermoelectric conversion. An extensive multi-physics simulation framework was introduced to accurately simulate conversion of heat into electricity taking into account thermoelectricity, joule heating, heat conduction and turbulent air cooling. To maximize the thermoelectric power, dimensions and the total number of thermoelectric modules were optimized under different oil pan geometries and driving conditions. Our simulations show that the maximum power density of 5.77 kW m−2 is achieved with multi-step oil pan geometry under a 76 °C temperature difference between the hot and cold sides. This power density surpassed those reported for the previous, conventional (exhaust and radiator) thermoelectric applications and indicated that harvesting thermal energy from combustion engines using oil pans is a feasible energy recovery methodology to enhance fuel efficiency in automotive vehicles.

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  • Aljaghtham, Mutabe & Celik, Emrah, 2020. "Design optimization of oil pan thermoelectric generator to recover waste heat from internal combustion engines," Energy, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:energy:v:200:y:2020:i:c:s036054422030654x
    DOI: 10.1016/j.energy.2020.117547
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    References listed on IDEAS

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    3. Hsu, Ping-Chia & Saragih, Ahmad Abror & Huang, Mei-Jiau & Juang, Jia-Yang, 2022. "New machine functions using waste heat recovery: A case study of atmospheric pressure plasma jet," Energy, Elsevier, vol. 239(PD).
    4. Borhani, S.M. & Hosseini, M.J. & Pakrouh, R. & Ranjbar, A.A. & Nourian, A., 2021. "Performance enhancement of a thermoelectric harvester with a PCM/Metal foam composite," Renewable Energy, Elsevier, vol. 168(C), pages 1122-1140.
    5. Yang, Bo & Zeng, Chunyuan & Li, Danyang & Guo, Zhengxun & Chen, Yijun & Shu, Hongchun & Cao, Pulin & Li, Zilin, 2022. "Improved immune genetic algorithm based TEG system reconfiguration under non-uniform temperature distribution," Applied Energy, Elsevier, vol. 325(C).
    6. Aljaghtham, Mutabe & Celik, Emrah, 2022. "Design of cascade thermoelectric generation systems with improved thermal reliability," Energy, Elsevier, vol. 243(C).
    7. 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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