结构参数对固体氧化物电解槽性能的影响  

Influence of structural parameters on performance of solid oxide electrolysis cell

作　　者：朱李 杨雁[2] 王红涛 孙兆松 张伟[2] 曹军[1] 张莉[1] ZHU Li;YANG Yan;WANG Hongtao;SUN Zhaosong;ZHANG Wei;CAO Jun;ZHANG Li(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Sinopec(Dalian)Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian 106041,Liaoning Province,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]中国石化(大连)石油化工研究院有限公司,辽宁大连106041

出　　处：《化学工程》2024年第10期77-82,共6页Chemical Engineering(China)

摘　　要：SOEC(固体氧化物电解槽)的流道结构及电极厚度等结构参数对其性能具有重要影响。基于SOEC三维计算流体力学模型建立预测电流密度与温差的ANN(人工神经网络)模型,研究结构参数对SOEC电化学性能和温度场的影响规律。结果表明:ANN代理模型具有较高的精度和低的计算成本;温度分布均匀性与电解性能负相关;减小节距、肋宽和电极厚度会引起欧姆损耗的降低,电解槽的电流密度提高。与阳极肋宽相比,阴极肋宽对电流密度的影响更为显著,导致两者对温差的影响规律有所不同。当阳极厚度<40μm,阳极厚度减小导致反应活性面积急剧减小,电流密度因此降低。在参数研究范围内,当节距为1.8 mm,电解质厚度为8μm,阳极肋宽为0.6 mm,阴极肋宽为1.2 mm,阴极厚度为600μm时,能够保持高电流密度(>3700 A/m^(2))的同时获得最佳的温度均匀度。研究结果为固体氧化物电解槽的结构优化设计提供一种便捷可行的方法,具有重要指导意义。The structural parameters such as the flow channel structure and electrode thickness of solid oxide electrolysis cells have a significant impact on their performance.An artificial neural network prediction model of current density and temperature difference was established based on the three-dimensional computational fluid dynamics model of SOEC,and the influence laws of structural parameters on the electrochemical performance and temperature field of SOEC were investigated.The results show that the ANN surrogate model has high accuracy and low computational cost.The uniformity of temperature distribution is negatively correlated with electrolysis performance.Reducing the pitch,rib width,and electrode thickness will result in a decrease in ohmic losses and an increase in current density.The impact of cathode rib width relative to anode rib width on current density is more significant,leading to different effects on temperature difference between the two.When the anode thickness is less than 40μm,a decrease in anode thickness leads to a sharp decrease in the reactive area and a consequent decrease in current density.Within the specified parameter range,when the pitch is 1.8 mm,the electrolyte thickness is 8μm,the anode rib width is 0.6 mm,the cathode rib width is 1.2 mm,and the cathode thickness is 600μm,the temperature difference is minimized while maintaining a current density greater than 3700 A/m^(2).This study is of great guiding significance for the structural design and optimization of SOEC.

关 键 词：固体氧化物电解槽 计算流体力学 人工神经网络 电流密度 温差 

分 类 号：TK91[动力工程及工程热物理]