超调(微波通信)
固体氧化物燃料电池
体积流量
流量(数学)
电流(流体)
工作温度
合成气
阳极
阴极
机械
材料科学
核工程
控制理论(社会学)
工程类
化学
计算机科学
电气工程
物理
氢
有机化学
物理化学
电极
控制(管理)
人工智能
作者
Pengfei Zhu,Zhen Wu,Yuchen Yang,Huan Wang,Ruiqing Li,Fusheng Yang,Zaoxiao Zhang
出处
期刊:Applied Energy
[Elsevier]
日期:2023-11-01
卷期号:349: 121655-121655
被引量:2
标识
DOI:10.1016/j.apenergy.2023.121655
摘要
This work investigates the dynamic characteristics of solid oxide fuel cell (SOFC) under variation operating conditions and complements the dynamic response characteristics on SOFC operating end. The dynamic characteristics is significant to dynamic operation and performance control. The classical appropriate transfer functions are proposed to capture the practical changing process of operating conditions for the first time. The dynamic multi-physical field model is developed as a mapping function to obtain the dynamic characteristics. The SOFC will be stabilized again within 100 s after the flow rate variations, which means that SOFC can be in another stable operation. The current density obviously goes through an overshoot phase and then gradually reaches stability caused by cathode flow rate variation. While, the change of anode flow does not cause overshoot. It is also found that the "fuel starvation" phenomenon also does not exist during flow rate variations, which means the "fuel starvation" hardly needs to be considered under non-extreme changes in operating conditions. The step function is used to simulate the change process of syngas composition. The increase in current density can be divided into two stages, which last about 100 s totally. The variation amplitude of current density due to the fuel composition variation is relatively small, which means the change in fuel composition doesn't cause a very dramatic response. The cell length has relative significance influence on the dynamic characteristic. This dynamic model could also be used to simulate the dynamic response of SOFC with different geometric structures, especially those with large changes in length and direction. This work is expected to uncover the dynamic response characteristics of SOFC under the variations of operating parameters, and to provide data support and theoretical guidance for SOFC under variable operating conditions and performance control.
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