This paper mainly on 20 layer 3D solid oxide fuel cell stack of fuel, oxygen, porous electrode flow channel optimization analysis model is established, and uniform flow field analysis and optimization of the design work。 Research method is using gambit software for modeling and fluent software to solve the analysis。

Fuel cell is introduced in chapter 1。Lots of basic knowledge includes the basic working principle of fuel cell, advantages, disadvantages and classification。 Mainly introduces the basic theory of solid oxide fuel cell, advantages, disadvantages and structure。 This chapter is mainly to let us know about solid oxide fuel cell, the importance to be aware of the SOFC, and also describes the significance of this study。

The chapter 2 is mainly about planar SOFCs numerical simulation。 Because of the complicated structure of the SOFC, testing the performance of it is also more complicated。 Therefore, people in the development of the various efficient mathematical equations and mathematical model to simulate the SOFC, make the performance of SOFC research becomes simple。 Mainly introduces CFD software。

The chapter 3 is the main research object of this thesis is mainly introduced, 20 layer 3D solid oxide fuel cell stack air and three kinds of hydrogen channel simulation analysis。 Three kinds of hydrogen channel types were U, Z type and S type。 And the three types of cell stack on the tenth floor of a battery of flow velocity were separate analysis and comparison。

The chapter 4 is the summary of the whole paper。

Key words: solid oxide fuel cell stack, novel parallel flow plate, calculated fluid dynamics, numerical simulating, flow distribution quality, performance prediction

目 录

第一章 绪论 1

1。1 能源与环境 1

1。2 燃料电池 1

1。2。1 燃料电池的原理 1

1。2。2 燃料电池的分类 1

1。2。3 燃料电池的优点和缺点 2

1。3 固体氧化物燃料电池 2

1。3。1  SOFC的工作原理 3

1。3。2  SOFC的常见构型 4

1。3。3  SOFC各部件的材料 7

第二章 SOFC的数值模型 10

2。1  SOFC数值模型的研究历史 10

2。2  SOFC的数学基础和理论分析 10

2。2。1 理想电势 10

2。2。2 极化损失 11

2。3  SOFC内各部分的输运模型 12

2。3。1 气道的输运模型 12

2。3。2 多孔电极里的输运模型 12

2。3。3  SOFC电解质里的输运模型 14

2。4 气道研究基本理论 15

2。4。1 流体黏性和雷诺数 15

2。4。2 气道两端压强差与质量流量之间的关系 15

2。5  CFD软件介绍 15

2。5。1 对气道进行前期处理的软件——Gambit 16

2。5。2 对气道进行后期处理的软件——Fluent 16

第三章 平板燃料电池空气和燃料管道建模与分析