Analysis of the Thermal-Electric Performance of the Solid Oxide Fuel Cell With a Zigzag Channel Under Different Operating Conditions

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2025-06-24 DOI:10.1002/fuce.70010

Xiaoyi Su, Li Jia, Chao Dang, Qianlong Wanng

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Abstract

In the present study, a strongly coupled three-dimensional thermal-electric-fluid-mass model was developed, and the thermal-electric performance of the solid oxide fuel cell (SOFC) with a zigzag channel under various operating conditions was analyzed. The results indicated that increasing the operating temperature and the anode inlet Reynolds number could enhance the output power density of the SOFC, whereas the temperature gradient within the SOFC also increased accordingly. The enhancement of these parameters led to an increase in the electrical performance (characterized by power density) of the SOFC while concurrently diminishing its thermal performance (characterized by temperature gradient). Under the same conditions, the SOFC with a zigzag channel exhibited superior electrical performance compared to the SOFC with a conventional parallel channel, albeit with slightly inferior thermal performance. Keeping the flow parameters constant (Re = 1.0) and the temperature maintained at 1123 K, the electrical performance of the SOFC with a zigzag channel was 8.6% higher than that of the SOFC with a parallel channel, whereas the thermal performance was 4.2% lower. Keeping the temperature parameter constant (T = 1073 K) and the anode inlet Reynolds number maintained at 1.7, the output power density of the SOFC with a zigzag channel was 5.9% higher than that of the SOFC with a parallel channel, whereas the temperature uniformity was 2.6% lower. The issue of internal temperature non-uniformity caused by the zigzag channel design of the SOFC could be balanced by adopting the co-flow operation condition. At a working temperature and flow condition of T = 1073 K and Re = 1.0, the thermal performance of the SOFC with a zigzag channel in a co-flow configuration was 5% higher than that in a counter-flow configuration, whereas its electrical performance decreased by only 0.2% compared to the counter-flow configuration.

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不同工况下之字形通道固体氧化物燃料电池的热电性能分析

建立了三维强耦合的热电-流-质模型，分析了具有之字形通道的固体氧化物燃料电池（SOFC）在不同工况下的热电性能。结果表明，提高工作温度和阳极入口雷诺数可以提高SOFC的输出功率密度，同时SOFC内部的温度梯度也相应增大。这些参数的增强导致SOFC的电气性能（以功率密度为特征）的增加，同时降低了其热性能（以温度梯度为特征）。在相同的条件下，与传统的并行通道的SOFC相比，具有之字形通道的SOFC表现出更好的电学性能，尽管热性能略差。在流动参数不变（Re = 1.0）、温度为1123 K的条件下，锯齿形通道SOFC的电学性能比平行通道SOFC的电学性能高8.6%，而热学性能却低4.2%。当温度参数T = 1073 K不变，阳极入口雷诺数为1.7时，锯齿形通道SOFC的输出功率密度比平行通道SOFC的输出功率密度高5.9%，温度均匀性降低2.6%。采用共流工况可以平衡SOFC之字形通道设计引起的内部温度不均匀性问题。在T = 1073 K和Re = 1.0的工作温度和流量条件下，锯齿形通道的SOFC在共流配置下的热学性能比逆流配置下提高了5%，而电学性能仅比逆流配置下下降了0.2%。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.