微通道重整器的动态特性建模与仿真

燃料电池通常需要根据负载的变化而调整工作状态,因此其动态特性是关系到系统性能的关键因素.而重整器作为燃料电池系统的一个重要部件,其动态特性的研究显然就十分必要.选用结构紧凑、性能优良的微通道重整器,通过机理建模得到其集总参数动态数学模型,然后在Matlab平台上构建了其仿真模型.根据燃料电池实际运行过程中负荷变化的特点,分别对重整器的主要调控参数,如流量、温度和压力在发生动态变化的情况下进行了动态响应的仿真.仿真结果与参考文献结论一致,表明该模型能预估重整器动态特性,从而为重整器乃至燃料电池的控制系统设计提供参考.

Dynamic Modeling and Simulation of Microchannel Reformer

A fuel cell usually operates based on the requirement of the load, its response is the key factor to the system performance. The reformer is an important component in a fuel cell system, so it is of great importance to investigate the dynamic performance of the reformer, in this paper, a compact microchannel reformer with good performance is chosen to be investigated, and a lumped parameter dynamic model for this reformer is presented from its mechanism. The simulation model is built on the Matlab platform. The dynamic response of the reformer has been investigated under the step changes of tlow rate, inlet temperature and operation pressure which will be the main control variables. The results accord with the reference book, which indicate that the model can properly estimate the dynamic characteristics of a reformer and provide reference for the control system design of the reformer and even fuel cell stack.