CAJ | 학술논문

相比于传统动力系统,基于燃料电池的动力系统具有很多优点,但在实际运用中仍有许多亟需解决的问题,其中包括燃料电池系统的低温启动问题.本文对比了各种燃料电池低温启动方案的工作机理及其优缺点,归纳并分析了氢气催化燃烧所用催化剂和催化燃烧反应过程以及燃料电池低温启动过程等方面的相关研究成果,研究了影响催化燃烧的主要因素,得出以下结论:基于氢气低温催化燃烧的燃料电池低温启动策略具有较高的可行性;在不同反应模型的情况下,氢气都可以在微尺度管道内实现稳定的燃烧;表面催化反应对空间气相反应有抑制作用;空间气相与表面催化的耦合反应能得到最高的温度;氢气/空气预混合气体入口流速、导热壁及导热壁材料、管径和当量比均对催化燃烧有着重要的影响.
상비우전통동력계통,기우연료전지적동력계통구유흔다우점,단재실제운용중잉유허다극수해결적문제,기중포괄연료전지계통적저온계동문제.본문대비료각충연료전지저온계동방안적공작궤리급기우결점,귀납병분석료경기최화연소소용최화제화최화연소반응과정이급연료전지저온계동과정등방면적상관연구성과,연구료영향최화연소적주요인소,득출이하결론:기우경기저온최화연소적연료전지저온계동책략구유교고적가행성;재불동반응모형적정황하,경기도가이재미척도관도내실현은정적연소;표면최화반응대공간기상반응유억제작용;공간기상여표면최화적우합반응능득도최고적온도;경기/공기예혼합기체입구류속、도열벽급도열벽재료、관경화당량비균대최화연소유착중요적영향.
When contrasting with traditional power system,fuel cell has a lot of advantages. But it still has many practical problems,such as low-temperature cold startup. Different strategies of fuel cell cold startup were discussed. Some related researches on hydrogen catalytic combustion and fuel cell cold startup were summarized and analyzed and the factors affecting the catalytic combustion were investigated. Hydrogen low-temperature catalytic combustion provided one way to achieve effective and reliable startup of fuel cell. Hydrogen could achieve stable combustion in a micro-tube for different reaction models. Surface catalytic combustion restrained gas phase combustion. The highest temperature could be obtained when surface catalytic combustion and gas phase combustion occurred at the same time. Inlet velocity,conductive wall and its material,tube diameter as well as equivalent ratio of hydrogen/air mixture had significant influence on catalytic combustion of hydrogen.