燃料电池/燃气轮机混合动力系统中催化燃烧室特性分析

Characteristic Analysis of a Catalytic Combustor in a Fuel Cell/Gas Turbine Hybrid Power System

对熔融碳酸盐燃料电池/微型燃气轮机(MCFC/MGT)混合动力系统中的催化燃烧室进行了实验和理论分析,确定了燃烧室入口温度、燃料浓度对燃料转化率的影响,在非设计工况下运行时催化燃烧室入口条件会发生变化,应用数学模型分析了各主要因素对催化燃烧室运行特性的影响。结果表明,计算结果与实验结果的最大误差在4%以内。在混合动力系统的运行范围内催化燃烧室入口温度高于770K时燃料转化率达99%以上,而入口流速和燃料浓度的变化对转化率的影响不明显。

An experimental and theoretical analysis was conducted of a catalytic combustor in a melted carbonate fuel cell/micro gas turbine (MCFC/MGT) hybrid power system. Through an experimental analysis, determined was the influence of the inlet temperature and fuel concentration of the combustor on the fuel conversion rate,and in the meantime the correctness of the mathematical model being used was also verified. When the hybrid power system is operating at off-design conditions, the inlet condition of its catalytic combustor may undergo a change. A mathematical model was used to analyze the influence of various main factors on the operation characteristics of the catalytic combustor. The research results show that the maximal error between the calculated results and the test ones is within a range of 4%. In the operation range of the hybrid power system, the catalytic combustor can always maintain a high fuel conversion rate, being invariably over 99% when the inlet temperature is higher than 770 K. The change of the inlet flow speed and fuel concentration has no conspicuous influence on the fuel conversion rate. It is feasible to use the catalytic combustor for the hybrid power systems.