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An Experimental Study on the FMEA Evaluation of Non-metallic Materials in High-Pressure Hydrogen Facility

고압 수소설비용 비금속부품 소재의 FMEA 평가를 통한 실험적 연구

  • Ahn, Jeongjin (Department of New Energy Engineering, Graduate School of Energy and Environment, Seoul National University of Science and Technology) ;
  • Kim, Wanjin (Korea Gas Safety Corporation) ;
  • Kim, Laehyun (Graduate School of Energy and Environment, Seoul National University of Science and Technology)
  • 안정진 (서울과학기술대학교 에너지환경대학원 신에너지공학과) ;
  • 김완진 (한국가스안전공사) ;
  • 김래현 (서울과학기술대학교 에너지환경대학원)
  • Received : 2019.07.25
  • Accepted : 2019.08.16
  • Published : 2019.09.30

Abstract

According to South Korea's policy of supplying eco-friendly hydrogen vehicles, related industries are actively conducting research on the development of hydrogen cars and hydrogen charging station infrastructure. On the other hand, there is a lack of empirical research and assessment of the risk of non-metallic materials (such as liners, seals, gaskets) for classified materials that directly affect the durability and reliability of hydrogen vehicles and hydrogen charging stations. In this study, the risk factors for liners and seals of non-metallic parts used in high-pressure hydrogen installations were derived using FMEA, and the RPN values were calculated by converting the severity, frequency of occurrence and degree of detection into scores. The maximum value of the RPN 600, minimum value 63, average value 278.5 was calculated and periodic control of the liner and seal was identified as important. In addition, through hydrogen soakage and oxygen aging tests for non-metallic rubber products, physical test values that can be used as basic data were presented.

국내 친환경 수소차 보급 정책에 따라 수소차와 수소충전소 인프라 개발에 대한 관련 업계의 연구는 활발하게 진행 중이다. 반면에 수소차와 수소충전소의 내구성 및 신뢰성에 직접적인 영향을 주는 기밀용 비금속 소재(라이너, 씰, 개스킷 등)의 위험성 평가 및 재료에 관한 실증 연구는 부족한 실정이다. 이에 본 연구에서는 FMEA를 활용하여 고압 수소 설비에 사용되는 비금속 부품의 라이너와 씰에 대한 위험요소를 도출한 후 심각도, 발생빈도, 검출도 등급을 점수로 환산하여 RPN값을 산정하였다. RPN의 최대값 600, 최소값 63, 평균값이 278.5로 산출되었으며, 라이너와 씰에 대한 주기적인 관리가 중요함을 확인하였다. 더불어 비금속 고무제품에 대한 수소침지와 산소노화시험을 통해 기초 자료로 활용 가능한 물리적 실험값을 제시하고자 하였다.

Keywords

References

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