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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Cryogenic Line Chill Down Characteristics of LNG

극저온 LNG 배관냉각 특성에 대한 연구

  • BYEONGCHANG, BYEON (LNG and Cryogenic Technology Center, Korea Institute of Machinery & Materials) ;
  • KYOUNG JOONG, KIM (Mechanical Engineering Department, KAIST) ;
  • SANGKWON, JEONG (Mechanical Engineering Department, KAIST) ;
  • MO SE, KIM (LNG and Cryogenic Technology Center, Korea Institute of Machinery & Materials) ;
  • SANGYOON, LEE (LNG and Cryogenic Technology Center, Korea Institute of Machinery & Materials) ;
  • KEUN TAE, LEE (LNG and Cryogenic Technology Center, Korea Institute of Machinery & Materials) ;
  • DONGMIN, KIM (LNG and Cryogenic Technology Center, Korea Institute of Machinery & Materials)
  • 변병창 (한국기계연구원 LNG.극저온기계기술 시험인증센터) ;
  • 김경중 (KAIST 기계공학과) ;
  • 정상권 (KAIST 기계공학과) ;
  • 김모세 (한국기계연구원 LNG.극저온기계기술 시험인증센터) ;
  • 이상윤 (한국기계연구원 LNG.극저온기계기술 시험인증센터) ;
  • 이근태 (한국기계연구원 LNG.극저온기계기술 시험인증센터) ;
  • 김동민 (한국기계연구원 LNG.극저온기계기술 시험인증센터)
  • Received : 2022.10.11
  • Accepted : 2022.11.02
  • Published : 2022.12.30
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Abstract

In this research paper, we investigated the cryogenic line chill down characteristics of liquefied natural gas (LNG). A numerical analysis model was established and verified so that it can calculate the precise cooling characteristics of cryogenic fluid for the stable and safe utilization especially such as LNG and liquid hydrogen. The numerical modeling was programmed by C++ as an one-dimensional homogeneous model. The thermohydraulic cooling process was simulated using mass, momentum, energy conservation equations and appropriate heat transfer correlations. In this process, the relevant heat transfer correlations for nuclear boiling, transition boiling, film boiling, and single-phase heat transfer that can predict the experimental results were implemented. To verify the numerical modeling, several cryogenic line chill down experiments using LNG were conducted at the Korea Institute of Machinery & Materials (KIMM) LNG and Cryogenic Technology Center.

Keywords

Acknowledgement

이 논문은 2022년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구이다(20203010040020, 액화수소 충전소용 100 kg/h, 90 MPa급 극저온 왕복동 펌프 개발 및 20213030040460, 액체수소 운송선박 핵심시스템[화물창, BOG처리, CHS] 국산화 모델 개발).

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