Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Analysis of Flow Performance Factors According to Extreme Temperature Conditions of Hydrogen Inflow of FCEV Charging System Check Valve

FCEV 충전 시스템 체크밸브의 수소 유입 극한 온도 조건에 따른 유동 성능 인자 분석

  • SEUNG HUN OH (Department of Mechanical Engineering, Kongju National University Graduate School) ;
  • HYUN KYU SUH (Division of Mechanical and Automotive Engineering, Kongju National University)
  • 오승훈 (국립공주대학교 일반대학원 기계공학과) ;
  • 서현규 (국립공주대학교 기계자동차공학부)
  • Received : 2023.08.28
  • Accepted : 2023.10.16
  • Published : 2023.10.30
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Abstract

This study conducted numerical simulations with the purpose of analyzing the impact of variations in outlet pressure conditions under extreme temperature conditions on the fluid dynamics and performance of a check valve utilized in hydrogen refueling systems. Under the extreme temperature conditions, changes in outlet pressure conditions of the check valve were investigated to analyze velocity distributions, pressure distributions, and temperature distributions in the operational and connection regions. The analysis results indicated that changes in outlet pressure had a significant influence on the internal temperature variation of the check valve. Furthermore, due to density variations in the connection region caused by the cooling effect of excessively cooled hydrogen, a bias in the primary flow direction towards the lower part of the valve outlet was observed in the outlet area. Through a comparison of the results of the valve's inherent flow performance, represented by the flow coefficient, it was observed that when the pressure difference between the inlet and outlet was below 0.37 MPa, sufficient flow was not ensured.

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Acknowledgement

이 논문은 2022년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(2022303004020C, 수소저장시스템의 멀티 및 싱글 제어가 가능한 제어기 기술개발).

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