Abstract

In this paper, a three-dimensional computational fluid dynamics model based on the finite volume method is developed for an anode-supported solid oxide fuel cell with an active area of 1.54 cm². The numerical model including electrochemical reaction has been compared with experimental data obtained under the same conditions to verify the reliability of the code, air and fuel concentrations at the anode and cathode of the cell were shown and analyzed according to the three fuel utilization rates. The calculated current density of the SOFC has been affected by the flow velocity and gas concentration due to water vapor generation. The electrochemical reaction generates water vapors at the reaction sides which impedes gas diffusion. We have shown the streamlines of gas flow distracted by increased water vapor concentration. Consequently, the operating conditions of SOFC should be determined by considering the effects of water vapor generation for the practical applications. We have verified the water vapor generation in SOFC which significantly affects the performance.

中文翻译：

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水蒸气的产生对阳极支撑固体氧化物燃料电池活性区中电池极化的影响

摘要

本文针对有效面积为1.54 cm ²的阳极支撑固体氧化物燃料电池，建立了基于有限体积法的三维计算流体动力学模型。。将包括电化学反应的数值模型与在相同条件下获得的实验数据进行比较，以验证代码的可靠性，并根据三种燃料利用率显示并分析了电池阳极和阴极处的空气和燃料浓度。由于水蒸气的产生，SOFC的计算电流密度受到流速和气体浓度的影响。电化学反应在反应侧产生水蒸气，阻止气体扩散。我们已经显示出水蒸气浓度增加分散了气流的流线。因此，在实际应用中应考虑水蒸气产生的影响来确定SOFC的运行条件。