In-situ monitoring of temperature distribution in operating solid oxide fuel cell cathode using proprietary sensory techniques versus commercial thermocouples
In-situ monitoring of temperature distribution in operating solid oxide fuel cell cathode using proprietary sensory techniques versus commercial thermocouples
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DOI：
10.1016/j.apenergy.2018.08.120
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发表时间：
2018-11
期刊：
影响因子：
11.2
通讯作者：
E. Guk;Jung-Sik Kim;M. Ranaweera;V. Venkatesan;L. Jackson
中科院分区：
文献类型：
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作者：
E. Guk;Jung-Sik Kim;M. Ranaweera;V. Venkatesan;L. Jackson
固体氧化物燃料电池（SOFC）系统表面温度分布的真实的实时监测对于识别与温度相关的退化和了解电池性能是重要的。由于SOFC的恶劣操作环境，这种类型的监测受到限制。因此，通常通过应用考虑常规I-V（电流（I）-电压（V））曲线的建模工具来预测操作SOFC的温度变化。然而，实验获得的温度数据是至关重要的管理高温相关的退化和更可靠的建模的固体氧化物燃料电池。在这项研究中，固体氧化物燃料电池的温度分布是同时沿着整个电池阴极，使用商业TC的气体流动通道（目前的传统方法）旁边的内部开发的传感器感测点（SSP）直接从电池阴极表面在开路电压（OCV）和负载条件下。特别是在加载条件下，即使从相同的位置，从TC和SSP获得的温度之间也观察到相当大的差异。进一步研究了不同参数对温度变化的影响，包括OCV下的燃料/空气量、气体冷却效应、接触面积效应和负载条件下的流向效应。与从传统TC获得的分辨率相比，使用实施的传感器观察到的空间分辨率增加了五倍，同时具有更高的时间分辨率，这为进一步开发和调查测试单元和堆栈带来了希望。
Real time surface temperature distribution monitoring of Solid Oxide Fuel Cell (SOFC) systems is important to identify temperature related degradation and understand cell performance. This type of monitoring is limited due to the harsh operating environment of SOFC. Therefore, the temperature variation of an operating SOFC is generally predicted by applying modelling tools which take into account the conventional I-V (current (I)-voltage (V)) curve. However, experimentally obtained temperature data is vital for management of high temperature related degradation and for more reliable modelling of the SOFC. In this study, the temperature distribution of the SOFC isin-situmonitored along the entire cell cathode simultaneously, using commercial TCs on the gas flow channel (the present conventional method) alongside the in-house-developed sensor sensing points (SSPs) directly from the cell cathode surface under both open circuit voltage (OCV) and loading conditions. A considerable difference is observed, especially under the loading condition, between the temperature obtained from the TCs and SSPs even from the same locations. Furthermore, the contribution(s) of different parameters on the temperature variation are investigated, including fuel/air amount under OCV, gas cooling effect, contact area effect and flow direction effect under the loading condition for the given SOFC. There is a fivefold increase in spatial resolution, alongside higher temporal resolution, being observed with the implemented sensor compared to the resolution obtained from the conventional TCs, which yields promise for further development and investigation into test cells and stacks.