不同燃料组分下DIR-SOFC多物理特性数值研究  

Numerical Study of Multiphysical Characteristics of DIR-SOFC Under Different Fuel Components

作　　者：陈伟文 屈治国 魏国盟 张剑飞 CHEN Weiwen;QU Zhiguo;WEI Guomeng;ZHANG Jianfei(Key Laboratory of Thermo-Fluid Science and Engineering of MOE,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,西安710049

出　　处：《工程热物理学报》2025年第2期620-626,共7页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2022YFB4003603);陕西省创新人才推进计划–科技创新团队(No.2024RS-CXTD-35)。

摘　　要：直接内重整固体氧化物燃料电池(DIR-SOFC)因其发电效率高和燃料适应性广等优点被广泛研究。然而部分SOFC模型对热辐射考虑不充分,模型准确率有待提高。此外,甲烷和氨气含量对DIR-SOFC多物理特性的影响及原因有待进一步研究。本文建立了考虑热辐射的不同燃料组分下DIR-SOFC单流道三维数值模型,探究了在纯氢中掺入甲烷和氨气含量对电池多物理特性的影响规律及作用机制。结果表明,在纯氢中掺入甲烷能够在提升电流密度的同时降低电池整体温度,掺入氨气能够在牺牲少量电流密度的情况下提升电池温度均匀性。甲烷和氨气对电流密度的影响取决于氢气浓度和电池温度的竞争作用。本文揭示的甲烷或氨气含量对电池多物理特性的影响机制对提升电池性能及电池热管理有重要意义。Direct internal reforming solid oxide fuel cell(DIR-SOFC)has been extensively researched due to its high power generation efficiency and wide fuel adaptability.However,some SOFC models insufficiently consider thermal radiation,indicating a need for improved model accuracy.Furthermore,the effects of methane and ammonia content on the multiphysical characteristics of DIR-SOFC and the underlying mechanisms require further investigation.This paper establishes a three-dimensional numerical model of a single-channel DIR-SOFC,considering thermal radiation and various fuel compositions.The study examines the impact and mechanisms of adding methane and ammonia to pure hydrogen on the cell's multiphysical characteristics.The results show that adding methane to pure hydrogen increases the current density while reducing the overall cell temperature,whereas adding ammonia improves temperature uniformity at the cost of a slight reduction in current density.The influence of methane and ammonia on current density is determined by the competing effects of hydrogen concentration and cell temperature.The mechanisms revealed in this study regarding the impact of methane or ammonia content on the cell's multiphysical characteristics are significant for enhancing cell performance and thermal management.

关 键 词：燃料 直接内重整 固体氧化物燃料电池 数值研究 多物理特性 

分 类 号：TM911.4[电气工程—电力电子与电力传动]