Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Disk Shape Design of Liquid Hydrogen Needle Valve with Various Inherent Flow Characteristics

다양한 고유유량 특성을 갖는 액체수소용 니들밸브의 디스크 형상 설계

  • NAGYUMI HWANG (Department of Mechanical Engineering, Dong-A University) ;
  • HYOLIM KANG (Department of Mechanical Engineering, Dong-A University) ;
  • JUNGHO KANG (Department of Mechanical Engineering, Dong-A University) ;
  • SEUNGHO HAN (Department of Mechanical Engineering, Dong-A University)
  • Received : 2024.07.02
  • Accepted : 2024.07.17
  • Published : 2024.08.30
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Abstract

Needle valves are instrumentation devices with quick-opening inherent flow characteristics, used in pipelines requiring rapid flow supply immediately upon opening the flow path. For needle valves applied in liquefied hydrogen plants operating in cryogenic environments, it is necessary from the initial design stage to have various inherent flow characteristics in addition to quick-opening, depending on the intended usage. In this study, the inherent flow characteristics of a 1/2'' liquid hydrogen needle valve were evaluated through computational fluid dynamics analysis. Disk shapes exhibiting various inherent flow characteristics were proposed by deriving the flow coefficient (Cv) according to changes in disk shapes. Among the disk shapes that directly affect the Cv, the disk length and slope angle were selected, and case studies were conducted with nine parameter combinations. From the results of the normalized Cv regarding to opening rates, disk lengths and slope angles exhibiting quick-opening, equal-percentage, and linear inherent flow characteristics were determined.

Keywords

Acknowledgement

본 논문은 부산광역시 및 (재)부산테크노파크 BB21 plus 사업으로 지원되었음.

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