固体氧化物燃料电池微型热电联供系统的动态建模与仿真  

Dynamic Modeling and Simulation of a Solid Oxide Fuel Cell Micro Combined Heat and Power System

作　　者：康英伟[1] 曹广益[1] 屠恒勇[1] 李箭[2] 胡鸣若[1] 

机构地区：[1]上海交通大学,上海市闵行区200240 [2]华中科技大学材料科学与工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2010年第14期121-128,共8页Proceedings of the CSEE

基　　金：国家高技术研究发展计划项目(863计划)(2006AA05Z148);上海市自然科学基金项目(08ZR1409800)~~

摘　　要：建立固体氧化物燃料电池微型热电联供系统的动态模型,并对平均电流密度扰动下该系统的动态行为进行仿真。系统中各部件的模型均是基于"节"和"控制体"的思想,通过应用摩尔数守恒和能量守恒建立。一些部件的分布参数特性和换热部件固体部分的热动态都在模型中得到考虑。仿真结果表明:部件对部件的影响是决定系统动态行为的重要因素;由于该系统利用催化燃烧器出来的热烟气为其上游的一些部件提供热能,因此系统的一些部件之间存在着相互影响;由于不同部件间热惯性的差异,系统变量的响应往往包含着快慢不同的动态过程;较大的换热面积造成空气预热器的热惯性较大,从而造成整个系统的动态响应时间都较长。研究工作有助于加深对固体氧化物燃料电池微型热电联供系统动态行为的认识,并为系统优化和控制设计打下基础。A dynamic model for a solid oxide fuel cell （SOFC） micro combined heat and power （micro-CHP） system was presented, and the dynamic simulation based on the present model was carried out with the average current density of SOFC as the disturbance. The model of each component in the system was developed on the basis of the concepts of ＂Node＂ and ＂Control Volume＂ by using molar and energy conservation. The spatially distributed nature of some components and the thermal dynamics of the solid parts of heat-exchange components were both taken into account in the system model. Simulation results show that the effect of one component on another is an important factor determining the system dynamic behavior. As the hot flue gas leaving the catalytic burner is used to provide thermal energy for some upstream components, there exist reciprocal effects between some components. Because of the difference of components＇ thermal inertia, the dynamic responses of system variables usually include dynamic processes with different changing velocities. The big heat-exchange area of the air pre-heater leads to its big thermal inertia, and causes a long response time of the system. The researching work gives insight into the dynamic behavior of the SOFC micro-CHP system, and paves the way for system optimization and control design.

关 键 词：固体氧化物燃料电池 微型热电联供 动态模型 仿真 

分 类 号：TM911[电气工程—电力电子与电力传动]