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Efficient Heat Exchange Configuration for Sub-Cooling Cycle of Hydrogen Liquefaction Process

Author

Listed:
  • Sihwan Park

    (School of Chemical Engineering, Pusan National University, 2 Busandaehak-ro, 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Wonjun Noh

    (School of Chemical Engineering, Pusan National University, 2 Busandaehak-ro, 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

  • Jaedeuk Park

    (Process Design & Development Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea)

  • Jinwoo Park

    (Department of Chemical Engineering, Kongju National University, 1223-24 Cheonan-daero, Seobuk-gu, Cheonan-si 31080, Korea)

  • Inkyu Lee

    (School of Chemical Engineering, Pusan National University, 2 Busandaehak-ro, 63beon-gil, Geumjeong-gu, Busan 46241, Korea)

Abstract

The hydrogen liquefaction process is highly energy-intensive owing to its cryogenic characteristics, and a large proportion of the total energy is consumed in the subcooling cycle. This study aimed to develop an efficient configuration for the subcooling cycle in the hydrogen liquefaction process. The He-Ne Brayton cycle is one of the most energy-efficient cycles of the various proposed hydrogen liquefaction processes, and it was selected as the base case configuration. To improve its efficiency and economic potential, two different process configurations were proposed: (configuration 1) a dual-pressure cycle that simplified the process configuration, and (configuration 2) a split triple-pressure cycle that decreased the flow rate of the medium- and high-pressure compressors. The ortho–para conversion heat of hydrogen is considered by using heat capacity data of equilibrium hydrogen. Genetic algorithm-based optimization was also conducted to minimize the energy consumption of each configuration, and the optimization results showed that the performance of configuration 1 was worse than that of the base case configuration. In this respect, although less equipment was used, the compression load on each compressor was very intensive, which increased the energy requirements and costs. Configuration 2 provided the best results with a specific energy consumption of 5.69 kWh/kg (3.2% lower than the base case configuration). The total expense of configuration 2 shows the lowest value which is USD 720 million. The process performance improvements were analyzed based on the association between the refrigerant composition and the heat exchange efficiency. The analysis demonstrated that energy efficiency and costs were both improved by dividing the pressure levels and splitting the refrigerant flow rate in configuration 2.

Suggested Citation

  • Sihwan Park & Wonjun Noh & Jaedeuk Park & Jinwoo Park & Inkyu Lee, 2022. "Efficient Heat Exchange Configuration for Sub-Cooling Cycle of Hydrogen Liquefaction Process," Energies, MDPI, vol. 15(13), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4560-:d:845049
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    References listed on IDEAS

    as
    1. Yang, Jae-Hyeon & Yoon, Younggak & Ryu, Mincheol & An, Su-Kyung & Shin, Jisup & Lee, Chul-Jin, 2019. "Integrated hydrogen liquefaction process with steam methane reforming by using liquefied natural gas cooling system," Applied Energy, Elsevier, vol. 255(C).
    2. Park, Jinwoo & Qi, Meng & Kim, Jeongdong & Noh, Wonjun & Lee, Inkyu & Moon, Il, 2020. "Exergoeconomic optimization of liquid air production by use of liquefied natural gas cold energy," Energy, Elsevier, vol. 207(C).
    3. Niaz, Saba & Manzoor, Taniya & Pandith, Altaf Hussain, 2015. "Hydrogen storage: Materials, methods and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 457-469.
    4. Lee, Inkyu & You, Fengqi, 2019. "Systems design and analysis of liquid air energy storage from liquefied natural gas cold energy," Applied Energy, Elsevier, vol. 242(C), pages 168-180.
    5. Lee, Inkyu & Park, Jinwoo & Moon, Il, 2017. "Conceptual design and exergy analysis of combined cryogenic energy storage and LNG regasification processes: Cold and power integration," Energy, Elsevier, vol. 140(P1), pages 106-115.
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    Cited by:

    1. Mun, Haneul & Park, Sihwan & Lee, Inkyu, 2023. "Liquid hydrogen cold energy recovery to enhance sustainability: Optimal design of dual-stage power generation cycles," Energy, Elsevier, vol. 284(C).
    2. Wang, Chenghong & Sun, Daming & Shen, Qie & Shen, Keyi & Linghu, Jianshe & Wang, Xiaodong, 2023. "Techno-economic analysis on nitrogen reverse Brayton cycles for efficient coalbed methane liquefaction process," Energy, Elsevier, vol. 280(C).
    3. Juyeong Seo & Haneul Mun & Jae Yun Shim & Seok Il Hong & Hee Dong Lee & Inkyu Lee, 2022. "Advanced Design of Integrated Heat Recovery and Supply System Using Heated Water Storage for Textile Dyeing Process," Energies, MDPI, vol. 15(19), pages 1-16, October.

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