In this study, a numerical analysis study on the heat transfer characteristics according to the opening and closing of the hydrogen shut-off valve was performed, and the temperature distribution of the key components of the hydrogen shut-off valve was predicted through the result. The ANSYS CFX program was used to predict the heat transfer characteristics of the hydrogen shut-off valve. When the hydrogen shut-off valve was open, the average temperature of the O-ring, which prevents hydrogen leak inside the solenoid valve, was approximately -40℃, and the plunger showed a maximum of -40℃ and a minimum of -110℃. When the hydrogen shut-off valve was completely closed, the O-ring showed approximately 24.82℃ and the plunger showed approximately 24.71℃, which were almost at room temperature.

Abstract
1. 서 론
2. 열전달 해석 방법
    2.1 지배방정식과 열전달 해석모 델
    2.2 열전달 해석모 델의 형상과 격자 생성
    2.3 해석변수와 경계조건
3. 열전달 해석결과 및 고찰
    3.1 차단밸브가 열린 경우(On)의 열전달 특성
    3.2 차단밸브가 닫힌 경우(Off)의 열전달 특성
4. 결 론
References

• 김나용(Graduate School, Gyeongsang National University) | Na-Yong Kim
• 김문학(R&D Center of Unick Corporation, UNICK Corp.) | Mun-Hak Kim
• 이치우(Dept. of Future Automotive Engineering, Gyeongsang National University) | Chi-Woo Lee Corresponding author