Observer design for a steam reformer based solid oxide fuel cell system with anode recirculation
Observer design for a steam reformer based solid oxide fuel cell system with anode recirculation
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基于蒸汽重整器的阳极再循环固体氧化物燃料电池系统的观察器设计
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发表时间：
2007
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通讯作者：
R. Mukherjee
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作者：
Tuhin Das;R. Mukherjee
在本文中，我们设计了一种观测器，用于在线估计基于蒸汽重整器的固体氧化物燃料电池（SOFC）系统中的物质浓度，该系统具有阳极再循环和甲烷作为燃料。由于在固体氧化物燃料电池中，蒸汽重整同时发生在重整器和燃料电池中，因此需要大量浓度传感器来精确控制关键性能变量，例如利用率和蒸汽与碳的比率。观察器的目的是减少控制所需的传感器数量。与专为化学反应器或专门为燃料电池设计的现有观察器相比，我们的设计考虑了重整器和燃料电池的耦合动力学。我们设计了一个自适应观察器，其中重整反应的速率被视为缓慢变化的未知参数。使用一些浓度传感器，我们表明可以动态估计燃料路径中的所有其他物质浓度、摩尔流量和反应速率。提供仿真结果来支持建议的设计。版权所有 © 2007 ASME
In this paper we design an observer for online estimation of species concentrations in a steam reformer based Solid Oxide Fuel Cell (SOFC) system with anode recirculation and with methane as fuel. Since in SOFCs steam reforming occurs both in the reformer and in the fuel cell, a large number of concentration sensors are necessary for accurate control of critical performance variables such as utilization and steam-to-carbon-ratio. The purpose of the observer is to reduce the number of sensors required for control. In contrast to existing observers which are either designed for chemical reactors or for fuel cells exclusively, our design considers the coupled dynamics of the reformer and the fuel cell. We design an adaptive observer where the rates of reforming reactions are treated as slowly varying unknown parameters. Using a few concentration sensors we show that all other species concentrations, molar flow rates, and reaction rates in the fuel path can be dynamically estimated. Simulation results are provided in support of the proposed design.Copyright © 2007 by ASME