Development of Novel PEM Membrane and Multiphase CD Modeling of PEM Fuel Cell

K. J. Berry ; Susanta Das

关键词: ALGORITHMS;    COMPUTERIZED SIMULATION;    DIFFUSION;    EFFICIENCY;    FLOW MODELS;    FLUID MECHANICS;    FUEL CELLS;    GAS FLOW;    MANAGEMENT;    MEMBRANES;    PERFORMANCE;    PROTONS;    SIMULATION;    TWO-PHASE FLOW;    WATER Fuel Cells;    Hydrogen;    PEM;    Membrane;   

DOI  :  10.2172/970828
RP-ID  :  Final
PID  :  OSTI ID: 970828
Others  :  TRN: US201009%%39

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

To understand heat and water management phenomena better within an operational proton exchange membrane fuel cell's (PEMFC) conditions, a three-dimensional, two-phase computational fluid dynamic (CFD) flow model has been developed and simulated for a complete PEMFC. Both liquid and gas phases are considered in the model by taking into account the gas flow, diffusion, charge transfer, change of phase, electro-osmosis, and electrochemical reactions to understand the overall dynamic behaviors of species within an operating PEMFC. The CFD model is solved numerically under different parametric conditions in terms of water management issues in order to improve cell performance. The results obtained from the CFD two-phase flow model simulations show improvement in cell performance as well as water management under PEMFCs operational conditions as compared to the results of a single phase flow model available in the literature. The quantitative information obtained from the two-phase model simulation results helped to develop a CFD control algorithm for low temperature PEM fuel cell stacks which opens up a route in designing improvement of PEMFC for better operational efficiency and performance. To understand heat and water management phenomena better within an operational proton exchange membrane fuel cell's (PEMFC) conditions, a three-dimensional, two-phase computational fluid dynamic (CFD) flow model has been developed and simulated for a complete PEMFC. Both liquid and gas phases are considered in the model by taking into account the gas flow, diffusion, charge transfer, change of phase, electro-osmosis, and electrochemical reactions to understand the overall dynamic behaviors of species within an operating PEMFC. The CFD model is solved numerically under different parametric conditions in terms of water management issues in order to improve cell performance. The results obtained from the CFD two-phase flow model simulations show improvement in cell performance as well as water management under PEMFCs operational conditions as compared to the results of a single phase flow model available in the literature. The quantitative information obtained from the two-phase model simulation results helped to develop a CFD control algorithm for low temperature PEM fuel cell stacks which opens up a route in designing improvement of PEMFC for better operational efficiency and performance.