不同极化电压下固体氧化物燃料电池内部状态的数值模拟

Numerica Numerical Simulation of Internal States in Solid Oxide Fuel Cells under Different Polarization Voltages

摘要: 本文基于COMSOL Multiphysics软件，建立了一个平板式固体氧化物燃料电池(SOFC)单电池的三维多物理场耦合模型。该模型综合考虑了电化学反应、流体流动、物质浓度和传热四个场的相互作用。研究的核心是通过改变极化电压(从0.1 V到0.7 V)，系统地分析其对SOFC内部关键状态参数的影响，包括电流密度分布、氧气和氢气的浓度分布、气体流速以及电池的温度分布。研究发现，极化电压显著影响电流密度的分布模式、气体消耗速率、电池温度以及气体流速，并识别出0.4 V~0.5 V区间是多个物理量变化趋势的转折点。

Abstract: Based on the COMSOL Multiphysics software, this paper establishes a three-dimensional multiphysics coupled model for a planar solid oxide fuel cell (SOFC) single cell. The model comprehensively considers the interactions among four fields: electrochemical reaction, fluid flow, material concentration, and heat transfer. The core of the study is to systematically analyze the effects of varying polarization voltage (from 0.1 V to 0.7 V) on key state parameters within the SOFC, including current density distribution, oxygen and hydrogen concentration distribution, gas flow rate, and cell temperature distribution. The study finds that polarization voltage significantly affects the distribution pattern of current density, gas consumption rate, cell temperature, and gas flow rate, and identifies the range of 0.4 V~0.5 V as a turning point for the variation trends of multiple physical quantities.