Numerical Analysis on the Cathode in the PEMFC

• Main Authors: Yan-Tung Chen, 陳彥同
• Other Authors: 林育才
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/46789577290629487855

碩士 === 元智大學 === 機械工程學系 === 94 === In this paper, a half-cell model, only considering the gas channel and the gas diffusion layer on the cathode, has been proposed and applied to two types of flow channel, the serpentine and the interdigitated channel. The corresponding cell performance has also been obtained under several operating conditions. It is found that the current density is affected by different parameters, such as the flow type, the operating temperature, the inlet velocity, and the oxygen consumption. In order to compare with the performance of the whole-cell model, the Polynomial Regression and the Root Mean Square Error have been used to determine the corresponding constants in the empirical formulation we used in the paper. It is shown that the half-cell model can be used to replace the whole cell model with appropriate empirical formulation and constants to save computational time. At lower mass flow rates and in higher current densities, there may be some discrepancy between these two models due to the concentration polarization effect. However, under other conditions, the half-cell model work quite well and can be used to replace the whole-cell model.