직접 메탄올 연료전지의 운전조건이 성능에 미치는 영향에 관한 해석적 연구 = An Analytical Study on the Effect of Operating Parameters on the Performance of the Direct Methanol Fuel Cell

다국어 초록 (Multilingual Abstract)

The effects of operating conditions on the performance of direct methanol fuel cell (DMFC) were investigated. The simplified DMFC model was suggested to present two-phase mass transport phenomena. Various processing parameters, such as methanol concentration, anode/cathode flow rate, porosities of porous media, and the amount of methanol crossover were selected to investigate their effects on the DMFC performance. The results indicated that DMFC performance was strongly influenced by the amount of methanol crossover, the porosities of diffusion and catalyst layer, and the methanol flow rate. These simulation results were compared with the experimental data in I-V curve. The analytical results show a fairly good agreement with the experimental results and this simple model can be used as a design tool in the DMFC fabrication.

목차 (Table of Contents)

• 1. 서론 = 1
• 1.1. 연료전지 (Fuel Cell) = 1
• 1.2. DMFC의 구조 = 3
• 1.3. DMFC의 원리 = 4
• 2. 이론적 배경 = 6
• 3. 수학적 모델 = 9
• 3.1. 모델 설정 = 9
• 3.2. 모델 가정 = 10
• 3.3. 지배방정식 = 11
• 3.3.1. Anode Flow Channel (AFC) = 11
• 3.3.2. Anode gas Diffusion Layer (ADL) = 13
• 3.3.3. Anode Catalyst Layer (ACL) = 14
• 3.3.4. Proton Exchange Membrane (MEM) = 16
• 3.3.5. Cathode Catalyst Layer (CCL) = 17
• 3.3.6. Cathode gas Diffusion layer (CDL) = 18
• 3.3.7. Cathode Flow Channel (CFC) = 19
• 3.3.8. 각층의 생성항 및 물리적 파라매터 = 20
• 4. 결과 및 고찰 = 25
• 4.1. 온도의 영향 = 28
• 4.2. 공급유량의 영향 = 30
• 4.3. 메탄올 농도의 영향 = 35
• 4.4. GDL층의 공극률에 따른 영향 = 42
• 4.5. 음극에서 산소와 물(증기)의 농도 분포 = 45
• 5. 결론 = 48
• 6. 참고문헌 = 54