A pseudo-phase-equilibrium approach for the calculation of liquid water saturation in the cathode gas diffuser of proton-exchange-membrane fuel cells
作者： Hsiao-Kuo Hsuen , Ken-Ming Yin
DOI: 10.1016/J.IJHYDENE.2011.02.047
关键词: Analytical chemistry 、 Water transport 、 Mechanics 、 Electrochemical kinetics 、 Capillary action 、 Gaseous diffusion 、 Membrane electrode assembly 、 Water gas 、 Cathode 、 Proton exchange membrane fuel cell 、 Chemistry
摘要: The cathode compartment of membrane electrode assembly (MEA) the proton-exchange-membrane fuel cell (PEMFC) is studied theoretically. A pseudo-phase-equilibrium approach adopting an approximate phase-equilibrium equation, incorporated with associated equations gaseous multi-component diffusion, liquid water capillary transport, and surface electrochemical kinetics, well characterizes performance under unsaturated feed. avoids need explicit front tracking so that only a single domain formulation, without consideration interior boundary, required for simulation. In order to illustrate capability proposed approach, mathematical model MEA in one-dimension formulated, which gas species concentration profiles, distribution, are calculated. validity then evaluated over extensive polarization range specified operating temperature, pressure, inlet humidity. solutions obtained using exact equation compared wide parameter values. addition, influences important transport parameters such as coefficient, diffuser porosity, absolute permeability discussed.
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