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Ideal Point Design and Operation of CO 2 -Based Transcritical Rankine Cycle (CTRC) System Based on High Utilization of Engine’s Waste Heats

Author

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  • Lingfeng Shi

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Gequn Shu

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Hua Tian

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Guangdai Huang

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Liwen Chang

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Tianyu Chen

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

  • Xiaoya Li

    (State Key Laboratory of Engines, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China)

Abstract

This research conducted a study specially to systematically analyze combined recovery of exhaust gas and engine coolant and related influence mechanism, including a detailed theoretical study and an assistant experimental study. In this research, CO 2 -based transcritical Rankine cycle (CTRC) was used for fully combining the wastes heats. The main objective of theoretical research was to search an ‘ideal point’ of the recovery system and related influence mechanism, which was defined as operating condition of complete recovery of two waste heats. The theoretical methodology of this study could also provide a design reference for effective combined recovery of two or multiple waste heats in other fields. Based on a kW-class preheated CTRC prototype that was designed by the ‘ideal point’ method, an experimental study was conducted to verify combined utilization degree of two engine waste heats by the CTRC system. The operating results showed that the prototype can gain 44.4–49.8 kW and 22.7–26.7 kW heat absorption from exhaust gas and engine coolant, respectively. To direct practical operation, an experimental optimization work on the operating process was conducted for complete recovery of engine coolant exactly, which avoided deficient or excessive recovery.

Suggested Citation

  • Lingfeng Shi & Gequn Shu & Hua Tian & Guangdai Huang & Liwen Chang & Tianyu Chen & Xiaoya Li, 2017. "Ideal Point Design and Operation of CO 2 -Based Transcritical Rankine Cycle (CTRC) System Based on High Utilization of Engine’s Waste Heats," Energies, MDPI, vol. 10(11), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1692-:d:116439
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    References listed on IDEAS

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    2. Li, Xiaoya & Tian, Hua & Shu, Gequn & Zhao, Mingru & Markides, Christos N. & Hu, Chen, 2019. "Potential of carbon dioxide transcritical power cycle waste-heat recovery systems for heavy-duty truck engines," Applied Energy, Elsevier, vol. 250(C), pages 1581-1599.
    3. Shi, Lingfeng & Shu, Gequn & Tian, Hua & Huang, Guangdai & Li, Xiaoya & Chen, Tianyu & Li, Ligeng, 2018. "Experimental investigation of a CO2-based Transcritical Rankine Cycle (CTRC) for exhaust gas recovery," Energy, Elsevier, vol. 165(PB), pages 1149-1159.
    4. Zhang, Shijie & Xu, Xiaoxiao & Liu, Chao & Dang, Chaobin, 2020. "A review on application and heat transfer enhancement of supercritical CO2 in low-grade heat conversion," Applied Energy, Elsevier, vol. 269(C).
    5. Li, Ligeng & Tian, Hua & Liu, Peng & Shi, Lingfeng & Shu, Gequn, 2021. "Optimization of CO2 Transcritical Power Cycle (CTPC) for engine waste heat recovery based on split concept," Energy, Elsevier, vol. 229(C).
    6. Li, Xiaoya & Tian, Hua & Shu, Gequn & Hu, Chen & Sun, Rui & Li, Ligeng, 2018. "Effects of external perturbations on dynamic performance of carbon dioxide transcritical power cycles for truck engine waste heat recovery," Energy, Elsevier, vol. 163(C), pages 920-931.
    7. Huang, Guangdai & Shu, Gequn & Tian, Hua & Shi, Lingfeng & Zhuge, Weilin & Zhang, Jing & Atik, Mohammad Atikur Rahman, 2020. "Development and experimental study of a supercritical CO2 axial turbine applied for engine waste heat recovery," Applied Energy, Elsevier, vol. 257(C).
    8. Ignacio López Paniagua & Ángel Jiménez Álvaro & Javier Rodríguez Martín & Celina González Fernández & Rafael Nieto Carlier, 2019. "Comparison of Transcritical CO 2 and Conventional Refrigerant Heat Pump Water Heaters for Domestic Applications," Energies, MDPI, vol. 12(3), pages 1-17, February.
    9. Rui Wang & Xuan Wang & Hua Tian & Gequn Shu & Jing Zhang & Yan Gao & Xingyan Bian, 2019. "Dynamic Performance Comparison of CO 2 Mixture Transcritical Power Cycle Systems with Variable Configurations for Engine Waste Heat Recovery," Energies, MDPI, vol. 13(1), pages 1-23, December.
    10. Gequn Shu & Chen Hu & Hua Tian & Xiaoya Li & Zhigang Yu & Mingtao Wang, 2019. "Analysis and Optimization of Coupled Thermal Management Systems Used in Vehicles," Energies, MDPI, vol. 12(7), pages 1-17, April.

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