MEA내 물 농도구배를 고려한 준 3차원 고분자 전해질형 연료전지 동적 모델링 개발 = Quasi three-dimensional dynamic model of a proton exchange membrane fuel cell

다국어 초록 (Multilingual Abstract)

A quasi three-dimensional dynamic model of a proton exchange membrane fuel cell (PEMFC) with considering the gradient of water concentration in the MEA has been developed by using the Matlab/Simulink<SUP>®</SUP>, The new PEM model is that of a single 240 ㎠. The cell is discretized into control volumes in the flow cross-section as well as along the stream-wise direction. In order to investigate the distribution of water concentration of the MEA in detail, the GDL was discretized into three control volumes in the model. The pseudo-homogenous model is adopted to investigate the oxygen diffusion and electrochemical reaction in the cathode catalyst layer. Through first principles physical modeling of mass transport, electrochemical reactions, and energy transfer, the model can resolve the local voltage response, current generation, species mole fractions, temperature, and membrane hydration of the PEMFC dynamically. Moreover the model can simulate transients in electrical load, inlet flow conditions, and other parameters to provide the insight into the local dynamic performance of a PEMFC. In order to validate the model, the polarization parameters were tuned to match one experimental operating point of the fuel cell. With this tuning, the model was shown to predict well the voltage current (V-I) behavior for the full range of cell operating current. The distribution of local current density, species mole fraction, membrane water hydration, and temperature is captured. Moreover, the gradient of the water concentration in the GDL was captured.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 장치
• 3. 모델 구성
• 4. 결과 및 고찰
• 5. 결론
• References