압력 분석법을 이용한 수소 연료전지 자동차용 고무 O-ring의 In-situ 고압 수소 투과 측정 시스템 개발

초록

Rubber O-rings are widely used in hydrogen fuel cell vehicles and hydrogen refueling stations to prevent leakage and safely store high-pressure hydrogen. In this study, we developed an in-situ high-pressure permeation measurement system capable of accurately evaluating the hydrogen permeation properties of rubber O-rings used under high-pressure hydrogen environments. The developed system consists of a permeation cell designed to safely apply hydrogen pressures up to 100 MPa to the test O-ring and a measuring part that quantitatively evaluates hydrogen permeation using a portable compact manometer based on the manometric analysis method. The measured hydrogen permeation data over time after high-pressure hydrogen injection was analyzed using a self-developed permeation-diffusion analysis program, enabling the evaluation of permeation properties such as permeability, diffusivity, and solubility. To validate the practical applicability of the developed system, permeation properties of EPDM rubber O-rings were measured under pressure conditions ranging from 5 MPa to 70 MPa.

키워드