不同燃料组分下 DIR-SOFC 多物理特性数值研究

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.