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Analyzing the Performance of a Dual Loop Organic Rankine Cycle System for Waste Heat Recovery of a Heavy-Duty Compressed Natural Gas Engine

Author

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  • Baofeng Yao

    (College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, China)

  • Fubin Yang

    (College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, China)

  • Hongguang Zhang

    (College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, China)

  • Enhua Wang

    (State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Qinghuayuan, Beijing 100084, China)

  • Kai Yang

    (College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, China)

Abstract

A dual loop organic Rankine cycle (DORC) system is designed to recover waste heat from a heavy-duty compressed natural gas engine (CNGE), and the performance of the DORC–CNGE combined system is simulated and discussed. The DORC system includes high-temperature (HT) and low-temperature (LT) cycles. The HT cycle recovers energy from the exhaust gas emitted by the engine, whereas the LT cycle recovers energy from intake air, engine coolant, and the HT cycle working fluid in the preheater. The mathematical model of the system is established based on the first and second laws of thermodynamics. The characteristics of waste heat energy from the CNGE are calculated according to engine test data under various operating conditions. Moreover, the performance of the DORC–CNGE combined system is simulated and analyzed using R245fa as the working fluid. Results show that the maximum net power output and the maximum thermal efficiency of the DORC system are 29.37 kW and 10.81%, respectively, under the rated power output condition of the engine. Compared with the original CNG engine, the maximum power output increase ratio and the maximum brake specific fuel consumption improvement ratio are 33.73% and 25%, respectively, in the DORC–CNGE combined system.

Suggested Citation

  • Baofeng Yao & Fubin Yang & Hongguang Zhang & Enhua Wang & Kai Yang, 2014. "Analyzing the Performance of a Dual Loop Organic Rankine Cycle System for Waste Heat Recovery of a Heavy-Duty Compressed Natural Gas Engine," Energies, MDPI, vol. 7(11), pages 1-22, November.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:11:p:7794-7815:d:42616
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    References listed on IDEAS

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    Cited by:

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    3. Athanasios G. Vallis & Theodoros C. Zannis & Elias A. Yfantis & Efthimios G. Pariotis & John S. Katsanis & Konstantina D. Asimakopoulou, 2020. "Thermo-Economic Study of a Regenerative Dual-Loop ORC System Coupled to the Main Diesel Engines of a General Support Vessel," Energies, MDPI, vol. 13(11), pages 1-45, June.
    4. Mat Nawi, Z. & Kamarudin, S.K. & Sheikh Abdullah, S.R. & Lam, S.S., 2019. "The potential of exhaust waste heat recovery (WHR) from marine diesel engines via organic rankine cycle," Energy, Elsevier, vol. 166(C), pages 17-31.
    5. 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.
    6. Giorgio Previati & Giampiero Mastinu & Massimiliano Gobbi, 2022. "Thermal Management of Electrified Vehicles—A Review," Energies, MDPI, vol. 15(4), pages 1-29, February.
    7. Alberto Benato & Alarico Macor, 2017. "Biogas Engine Waste Heat Recovery Using Organic Rankine Cycle," Energies, MDPI, vol. 10(3), pages 1-18, March.
    8. Xinyu Li & Tao Liu & Lin Chen, 2018. "Thermodynamic Performance Analysis of an Improved Two-Stage Organic Rankine Cycle," Energies, MDPI, vol. 11(11), pages 1-11, October.
    9. 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.
    10. Ping, Xu & Yao, Baofeng & Zhang, Hongguang & Yang, Fubin, 2021. "Thermodynamic analysis and high-dimensional evolutionary many-objective optimization of dual loop organic Rankine cycle (DORC) for CNG engine waste heat recovery," Energy, Elsevier, vol. 236(C).

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