固体氧化物燃料电池数值仿真模型的建立

来源期刊:中南大学学报(自然科学版)2019年第11期

论文作者:贾明 汤水 张茂贵 刘宇

文章页码:2633 - 2645

关键词:固体氧化物燃料电池;数值模拟;模型;电流密度;气体分布

Key words:SOFC(solid oxide fuel cell); numerical simulation; model; current density; gas distribution

摘    要:基于COMSOL Multi-physics 5.3a仿真平台,建立三维模型对固体氧化燃料电池进行数值计算。考虑板式固体氧化物燃料电池单体内部的气体流动、组分质量分数、电化学反应过程,研究不同工况下的气体分布、电流密度和极化情况,分析电池长度、工作温度、进气成分对固体氧化物燃料电池工作性能的影响。研究结果表明:固体氧化物燃料电池入口处气体质量分数较大,电化学反应速率也较快;在高电流密度下,入口氧气的质量分数会显著影响电池性能,而在低电流密度下,氧气质量分数不是影响电池电压的主要因素;当电池工作温度升高时,电池内部很多参数会发生变化。

Abstract: Based on the COMSOL Multi-physics 5.3a simulation platform, a 3D model for numerical calculation of solid oxide fuel cell was established. With consideration of the gas flow, component mass fraction and electrochemical reaction process inside the slabs solid oxide fuel cell(SOFC) monomer, the gas distribution, current density and polarization under different working conditions were studied, and the influence of cell length, operating temperature and intake composition on the performance of the solid oxide fuel cell was analyzed. The results show that the solid oxide fuel cell inlet gas mass fraction is higher and the electrochemical reaction rate is faster. In the case of high current density, the mass fraction of inlet oxygen significantly affects the battery performance, while in the case of low current density, the oxygen mass fraction is not the main factor affecting the battery voltage. When the working temperature of the battery increases, many parameters inside the battery change.

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