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Experimental study of energy utilization effectiveness of thermoelectric generator on diesel engine

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  • Kim, Tae Young
  • Negash, Assmelash A.
  • Cho, Gyubaek

Abstract

This study was devoted to investigating the energy utilization of a thermoelectric generator (TEG). Key factors governing the power generation characteristics of the TEG—the power output, system resistance, and conversion efficiency—are systematically analyzed under various engine operating conditions. The effects of heat rejection conditions on the energy utilization by the TEG are also examined. Experimental results show that a slight coolant temperature reduction of 10 K increases the TEG power output by up to 33.7%, increasing the short-circuit current. The coolant temperature reduction also causes more than 34.8% improvement in the conversion efficiency. Contour maps for the power output and conversion efficiency are proposed as functions of the engine load and speed. A maximum power output and conversion efficiency obtained are ∼125.7 W and ∼3.0%, respectively. In contrast to the coolant temperature effect, a change in the coolant flow rate has a relatively insignificant effect on energy utilization: the power output variation is only 6.8%–8.5%. The TEG design effectiveness is evaluated by analyzing the flow of exhaust gas energy. The analysis shows that a relatively large portion of exhaust gas energy (37.4%–47.1%) is lost to the environment instead of being used for power generation by the TEG.

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  • Kim, Tae Young & Negash, Assmelash A. & Cho, Gyubaek, 2017. "Experimental study of energy utilization effectiveness of thermoelectric generator on diesel engine," Energy, Elsevier, vol. 128(C), pages 531-539.
    • Handle: RePEc:eee:energy:v:128:y:2017:i:c:p:531-539
    DOI: 10.1016/j.energy.2017.04.060
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    References listed on IDEAS

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    Cited by:

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    2. Shu, Gequn & Ma, Xiaonan & Tian, Hua & Yang, Haoqi & Chen, Tianyu & Li, Xiaoya, 2018. "Configuration optimization of the segmented modules in an exhaust-based thermoelectric generator for engine waste heat recovery," Energy, Elsevier, vol. 160(C), pages 612-624.
    3. 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).
    4. Zhao, Yulong & Lu, Mingjie & Li, Yanzhe & Ge, Minghui & Xie, Liyao & Liu, Liansheng, 2021. "Characteristics analysis of an exhaust thermoelectric generator system with heat transfer fluid circulation," Applied Energy, Elsevier, vol. 304(C).
    5. Han, Zhiyue & Wang, Wenjie & Du, Zhiming & Zhang, Yupeng & Yu, Yue, 2021. "Self-heating inflatable lifejacket using gas generating agent as energy source," Energy, Elsevier, vol. 224(C).
    6. Kim, Tae Young & Kim, Junghwan, 2018. "Assessment of the energy recovery potential of a thermoelectric generator system for passenger vehicles under various drive cycles," Energy, Elsevier, vol. 143(C), pages 363-371.
    7. 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).
    8. Tae Young Kim, 2021. "Prediction of System-Level Energy Harvesting Characteristics of a Thermoelectric Generator Operating in a Diesel Engine Using Artificial Neural Networks," Energies, MDPI, vol. 14(9), pages 1-14, April.

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