熔融碳酸盐燃料电池动态特性的研究

基于能量守恒、质量平衡原理和热力学特性，提出了熔融碳酸盐燃料电池的数学模型，该模型考虑了电解质基块内的质量传递，以及质量传递对燃料电池内部热力学特性的影响，采用加权残差(MWR)数值方法和Matlab环境的系统函数化解偏微分方程组并建立动态仿真模型。仿真表明燃料电池内部各点的温度有较大的差异，随着燃料和氧化剂量的变动(增加)，电极一电解质的温度增加，而氧化剂流的温度有所下降。模型的物理参数是从某燃料电池研究所1．5kW熔融碳酸盐燃料电池获得。

STUDY OF MOLTEN CARBONATE FUEL CELL ON THERMODYNAMIC PROPERTIES

Based on the balance of energy and mass, considering the mass transfer in the electrolyte and its effect on MCFC thermal characteristics, the paper presents a Molten carbonate fuel cell (MCFC) mathematical model. Used the method of weighted residuals (MWR) which possess high precision for the solution of partial differential equation and the Matlab system function which is efficient for numerical resolution and simulation, a dynamical simulation model of MCFC is created. The results of simulation show that there is a different distribution of temperature in MCFC, and that with the rising of the quantity of fuel gas and oxidant gas, the temperature of electrolyte increases, and that of oxidant gas decreases. The parameters of the MCFC model are taken from the 1.5kW MCFC of Institute of Fuel Cell Research in Shanghai Jiaotong University.