Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on the Pressure Control Process of Gas Regulators through Numerical Analysis

수치해석을 통한 가스 레귤레이터의 압력제어 프로세스 고찰

  • Jung, Jun-Hwan (Dept. of Research&Development, SHINHWA HI-TEC Co.,Ltd.) ;
  • Nam, Chung-Woo (Hydrogen Storage and Fuelling R&D Center, Korea Automotive Technology Institute) ;
  • Kim, Min-Kyung (Dept. of Research&Development, SHINHWA HI-TEC Co.,Ltd.)
  • Received : 2021.08.20
  • Accepted : 2021.10.26
  • Published : 2021.10.30
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Abstract

The pressure drop phenomenon that occurs when the same flow rate is supplied to the gas regulator was analyzed. The regulator moves the position of the piston through the interaction of the force acting on the upper and lower parts of the piston and the spring tension to release the pressure of a specific range in a specific environment as constant pressure, thereby maintaining the pressure. The flow characteristics and pressure control process of the regulator were investigated through a numerical analysis technique as the volume of the fluid inside the regulator changed. As the gap between the piston and the piston seat decreased, the pressure drop increased and the flow velocity increased. It was verified through numerical analysis that the piston was positioned at 0.12mm under the same conditions as the pressure-flow test (inlet pressure 3MPa, outlet pressure 0.8MPa, flow rate 70kg/h).

가스 레귤레이터에 동일한 유량을 공급할 때 발생하는 압력 강하 현상을 분석하였다. 레귤레이터는 특정 범주의 환경에서 일정한 압력을 토출하기 위해 피스톤 상/하부에 작용하는 힘과 스프링 장력 간의 상호 작용으로 피스톤의 위치를 이동시켜 압력을 유지하는 특성이 있다. 레귤레이터 내부의 유체의 체적이 변화함에 따른 레귤레이터의 유동특성과 압력제어과정을 수치해석기법을 통해 분석하였다. 피스톤과 피스톤 시트 사이의 간격이 감소함에 따라 압력 강하가 증가하고 유속이 증가하였다. 압력-유량시험과 동일한 조건(입구압력 3MPa, 출구압력 0.8MPa, 유량 70kg/h)에서 피스톤이 0.12mm에 위치함을 수치해석을 통해 검증하였다.

Keywords

Acknowledgement

본 연구는 한국산업기술진흥원의 국제공동기술개발사업의 지원을 받아 수행한 연구입니다. (과제번호 : P0011926).

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