표제지
국문 초록
목차
1. 서론 12
2. 방법론 16
2.1. 실험 방법 16
2.1.1. 압축 실험 16
2.1.2. 누출 실험 22
2.2. 누출율 분석 28
3. 결과 및 고찰 30
3.1. 가스켓 두께 별 압축 변위와 압축 하중의 관계 30
3.2. 가스켓의 밀봉 특성 분석 32
3.2.1. 동일 두께의 가스켓 적용 시 내부 압력과 압축률에 따른 누출율 분석 32
3.2.2. 각링 가스켓의 두께 별 밀봉 특성 확보를 위한 최소 압축 변위 분석 35
3.2.3. 각링 가스켓과 돌기형 가스켓의 밀봉 특성 비교 39
3.3. Leakage Analysis Model 44
3.3.1. Leak 실험 결과 적용을 통한 누출 모델의 형상 계수 분석 44
3.3.2. Leakage Analysis Model 검증 48
4. 결론 50
참고문헌 52
Abstract 55
Table 1. Shape Specifications of Gaskets Used in the Compression Experiment 21
Table 2. Gasket Compressive Strains Leak Rate Model에 적용되는 실험 변수 29
Table 3. Gasket Compressive Strains Leak Rate Model의 가스켓 형상변수 29
Fig. 1. Schematic Diagram of PEMFC Single Cell 13
Fig. 2. 각링 가스켓 형상 (너비 3mm, 외경 40mm) 17
Fig. 3. 1 Embo 돌기형 가스켓 형상 (a) Top View (b) Cross Section View A-A 18
Fig. 4. 2 Embo 돌기형 가스켓 형상 (a) Top View (b) Cross Section View A-A 19
Fig. 5. Force Tester (A&D, MCT-2150, Japan) 20
Fig. 6. Zig for Compression Test of Gasket (A&D, MCT-01, Japan) 21
Fig. 7. Schematic Diagram of Gasket Sealing Experiment System (a) Nitrogen Gas Container (99.999% Purity) (b) Regulator (c)... 23
Fig. 8. Pressure Regulator (DANAKA, CMH-B515-DW, Japan) 24
Fig. 9. Pressure Gauge (SENSYS, SIG, Korea) 24
Fig. 10. Lower-Zig for Leakage Test of Gasket (a) Schematic of Top view (b) Schematic of Section view A-A (c) Actual Lower-Zig 25
Fig. 11. Leakage Experiment Flow Chart 26
Fig. 12. 게이지 압력 감소량 측정 방법 (1T Gasket, Gauge Pressure 1 bar) 27
Fig. 13. 가스켓 두께 별 압축 변형률-하중 선도(0.5T, 1.0T, 1.5T) 31
Fig. 14. Leakage Rate Curve According to the Compressive Strain for Different Inner Gauge Pressure (a) 0.5T Gasket (b) 1.0T... 34
Fig. 15. Leakage Rate Curve According to the Compressive Displacement for Different Inner Gauge Pressure (a) 0.5T Gasket... 37
Fig. 16. Minimum Compressive Displacement to Ensure Sealing Characteristics According to Gasket Thickness for Different... 38
Fig. 17. Leakage Rate Curve according to Compressive Load of Embossing Gasket and 1.5T Gasket (a) Inner Gauge Pressure :... 41
Fig. 18. Minimum Compressive Load to Ensure Sealing Characteristics According to Gasket Shape for Inner Gauge... 42
Fig. 19. Leakage Rate Curve according to Compressive Load of Embossing Gasket and 1.5T Gasket (a) Inner Gauge Pressure :... 43
Fig. 20. Leakage Rate according to Compression Strain with Leakage Experimental Results and Estimated Values using the... 46
Fig. 21. Trend of Gasket Shape Variables Obtained by Fitting Leakage Experimental Results to Gasket Compressive Strain Leak... 47
Fig. 22. Leakage Rate according to Compressive Strain by Fitting 1.0T Gasket Leakage Experimental Results to the... 49