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Multi Stage Organic Rankine Cycle Using Boil-Off Gas on Liquefied Hydrogen Carrier

Author

Listed:
  • Dahye Sung

    (Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Boen-gil, Saha-gu, Busan 49315, Republic of Korea)

  • Wongwan Jung

    (Department of Naval Architecture and Ocean Engineering, Dong-A University, 37 Nakdong-daero 550 Boen-gil, Saha-gu, Busan 49315, Republic of Korea)

  • Jungho Choi

    (Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Boen-gil, Saha-gu, Busan 49315, Republic of Korea)

Abstract

In this study, a Reheat Organic Rankine Cycle (ORC) utilizing the cold energy of liquefied hydrogen (LH 2 ) and liquefied natural gas (LNG) was proposed, and its performance was evaluated by comparing it with the base model, which represented a conventional ORC. The process was simulated using ethane and propane, which were considered as potential refrigerants for the target system. A case study was conducted on the inlet pressure and temperature of the turbine included in the process to determine the optimal operating point. The calculation results indicated that ethane exhibited a higher energy efficiency, and a maximum net power of 34.65 kW was obtained when the inlet pressure and temperature of the turbine were 40 bar and 75 °C, respectively. Additionally, an exergy analysis was conducted to quantitatively analyze the high energy efficiency of the Reheat ORC model. We confirmed that exergy efficiency was up to 2.4% higher than that of the base model.

Suggested Citation

  • Dahye Sung & Wongwan Jung & Jungho Choi, 2024. "Multi Stage Organic Rankine Cycle Using Boil-Off Gas on Liquefied Hydrogen Carrier," Energies, MDPI, vol. 17(24), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6251-:d:1541595
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    References listed on IDEAS

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    2. Schuster, A. & Karellas, S. & Aumann, R., 2010. "Efficiency optimization potential in supercritical Organic Rankine Cycles," Energy, Elsevier, vol. 35(2), pages 1033-1039.
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    4. Elizabeth Lindstad & Gunnar S. Eskeland & Agathe Rialland & Anders Valland, 2020. "Decarbonizing Maritime Transport: The Importance of Engine Technology and Regulations for LNG to Serve as a Transition Fuel," Sustainability, MDPI, vol. 12(21), pages 1-21, October.
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    Cited by:

    1. Wenke Yuan & Zixuan Yin & Yan Su & Zhangyu Liu & Leyi Bao & Jinyu An, 2025. "Design and Energy-Saving Analysis of a New LNG Vaporizer Based on Mg-Based Hydrogen Storage Metal," Energies, MDPI, vol. 18(4), pages 1-18, February.

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