储能科学与技术 ›› 2022, Vol. 11 ›› Issue (1): 291-296.doi: 10.19799/j.cnki.2095-4239.2021.0452

• 储能测试与评价 • 上一篇    下一篇

板式固体氧化物燃料电池积碳特性的数值研究

田辉1,2(), 华栋2, 曼茂立1(), 刘春哲1, 李国君2, 张兄文2   

  1. 1.河北石油职业技术大学机械工程系，河北 承德 067000
    2.西安交通大学能源与 动力工程学院，陕西 西安 710049
  • 收稿日期:2021-08-20 修回日期:2021-09-13 出版日期:2022-01-05 发布日期:2022-01-10
  • 通讯作者: 曼茂立 E-mail:tianhuicfd@gmail.com;31321522@qq.com
  • 作者简介:田辉（1982—），男，博士，研究方向为流体机械及固体氧化物燃料电池，E-mail：tianhuicfd@gmail.com|曼茂立，副教授，研究方向为固体氧化燃料电池，E-mail：31321522@qq.com。
  • 基金资助:
    国家自然科学基金项目(51276145)

Numerical study on carbon deposition characteristics of planar solid oxide fuel cell

Hui TIAN1,2(), Dong HUA2, Maoli MAN1(), Chunzhe LIU1, Guojun LI2, Xiongwen ZHANG2   

  1. 1.Department of Mechanical Engineering, Hebei University of Technology Petroleum, Chengde 067000, Hebei, China
    2.School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
  • Received:2021-08-20 Revised:2021-09-13 Online:2022-01-05 Published:2022-01-10
  • Contact: Maoli MAN E-mail:tianhuicfd@gmail.com;31321522@qq.com

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摘要：

固体氧化物燃料电池(SOFC)阳极积碳的发生是制约其高效稳定运行的瓶颈问题，文中介绍了阳极积碳对SOFC的影响，回顾了国内外研究此问题的三个典型方向及其进展；在此基础上，利用用户自定义子程序(UDF)与流体动力学计算软件Fluent建立的SOFC完整极化数值模型，对一板式SOFC的反应特性与积碳特性进行数值模拟与分析。文中首先给出了数值模拟的控制方程、极化模型及积碳模型，介绍了边界条件及方程离散方法，并在此基础上通过求解国际能源协会(IEA)的标准算例，验证了算法的准确性。最后对板式SOFC定常积碳特性的数值研究结果显示：在燃料入口处SOFC积碳产生速率较大，沿燃料气体流动方向积碳速率迅速减小；积碳的产生受CH4含量的影响较大，而受温度、H2、H2O以及CO气体浓度因素影响较小。本文研究有助于探索SOFC积碳产生的机理，同时为以天然气作燃料的SOFC运行参数最优化控制提供了依据。

关键词: 固体氧化物燃料电池, 阳极, 积碳, 数值模拟

Abstract:

Anode carbon deposition in solid oxide fuel cells (SOFCs) is a bottleneck restricting efficiency and stabilization. This paper introduces the influence of anode carbon deposition on SOFC, reviews three specific research directions in this area, and exhibits their progress at home and abroad. Furthermore, a complete polarization numerical model of SOFC is established using a user-defined function (UDF) in the CFD software FLUENT. Numerical simulation and analysis of carbon deposition characteristics of a planar SOFC are carried out. First, the governing equations, polarization, and carbon deposition models of the numerical simulation are given. Then the boundary conditions and equation discretization method are introduced. The accuracy of the algorithm is verified by solving an IEA standard problem. Finally, the numerical results of the steady carbon deposition characteristics of planar SOFC demonstrate the following: the carbon deposition rate is relatively high at the fuel inlet of SOFC and rapidly reduces along the fuel flow direction; the generation of carbon deposition is greatly affected by CH4, but less affected by temperature, and the concentration of H2, H2O, and CO gas. Our conclusion is helpful in exploring the mechanism of carbon deposition in SOFC and provides a means for the optimal control of SOFC operating parameters with natural gas as fuel.

Key words: SOFC, anode, carbon deposition, numerical simulation

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