Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Simulation Study on the Hydrogen Liquefaction through Compact GM Refrigerator

소형 GM 냉동기를 이용한 수소 액화에 관한 시뮬레이션 연구

  • JUNG, HANEUL (Department of Environment and Energy Engineering, The University of Suwon) ;
  • HAN, DANBEE (Department of Environment and Energy Engineering, The University of Suwon) ;
  • YANG, WONKYUN (Cryo H&I, Cryogenic R&D Center) ;
  • BAEK, YOUNGSOON (Department of Environment and Energy Engineering, The University of Suwon)
  • 정하늘 (수원대학교 환경에너지공학과) ;
  • 한단비 (수원대학교 환경에너지공학과) ;
  • 양원균 (크라이오에이치앤아이 초저온연구센터) ;
  • 백영순 (수원대학교 환경에너지공학과)
  • Received : 2022.10.13
  • Accepted : 2022.10.25
  • Published : 2022.10.30
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Abstract

Liquid hydrogen has the best storage capacity per unit mass and is economical among storage methods for using hydrogen as fuel. As the demand for hydrogen increases, the need to develop a storage and supply system of liquid hydrogen is emphasizing. In order to liquefy hydrogen, it is necessary to pre-cool it to a maximum inversion temperature of -253℃. The Gifford-McMahon (GM) refrigerator is the most reliable and commercialized refrigerator among small-capacity cryogenic refrigerators, which can extract high-efficiency hydrogen through liquefied hydrogen production and boil of gas re-liquefaction. Therefore, in this study, the optimal conditions for liquefying gas hydrogen were sought using the GM cryocooler. The process was simulated by PRO/II under various cooling capacities of the GM refrigerator. In addition, the flow rate of hydrogen was calculated by comparing with specific refrigerator capacity depending on the pressure and flow rate of a refrigerant medium, helium. Simulations were performed to investigate the optimal values of the liquefaction flow rate and compression pressure, which aim for the peak refrigeration effect. Based on this, a liquefaction system can be selected in consideration of the cycle configuration and the performance of the refrigerator.

Keywords

Acknowledgement

본 연구는 신산업진출 사업재편 핵심기술개발사업(P0020504) 일환으로 수행되었습니다.

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