质子交换膜燃料电池（PEMFC）气体扩散层（GDL）具有各向异性属性,常规数值模拟对GDL采取均匀模型,忽略了各向异性传递过程对PEMFC性能的影响。本文发展了一个三维非等温单相模型,在GDL平面内和GDL厚度方向采用不同的传递系数,模拟了各向异性传递系数对PEMFC整体和局部性能的影响。在本文计算条件下,GDL各向异性和均匀模型模拟得到的电池极化曲线几乎完全相同,但电池电流密度分布和温度分布等局部特性存在很大差异。该结果进一步证明了不能单独用极化曲线来验证电池数学模型的正确性。
The gas diffusion layer（GDL） of proton exchange membrane fuel cells（PEMFCs） exhibits strong structural anisotropy in through-plane and in-plane direction.However,the GDL has usually been simplified as a homogeneous porous structure in numerical modeling,and the anisotropic property of GDL is ignored.In this paper,a three dimensional.non-isothermal,single-phase model with different transport coefficients in through-plane and in-plane direction of the GDL is developed to investigate the effects of anisotropic transport characteristics of GDL on cell performance.From the results,it is found that although the overall cell performance is similar,local distributions,such as local current density and temperature,from the two models are significantly different.The results prove that only the polarization curve is not enough to verify the correctness of a simulation model.
参考文献
| [1] | Jer-Huan Jang;Wei-Mon Yan;Hung-Yi Li;Wei-Che Tsai .Three-dimensional numerical study on cell performance and transport phenomena of PEM fuel cells with conventional flow fields[J].International journal of hydrogen energy,2008(1):156-164. |
| [2] | Three-dimensional two-phase flow model of proton exchange membrane fuel cell with parallel gas distributors[J].Journal of Power Sources,2010(9):2764. |
| [3] | Jin Hyun Nam;Massoud Kaviany .Effective diffusivity and water-saturation distribution in single- and two-layer PEMFC diffusion medium[J].International Journal of Heat and Mass Transfer,2003(24):4595-4611. |
| [4] | Pasaogullari U;Mukherjee PP;Wang CY;Chen KS .Anisotropic heat and water transport in a PEFC cathode gas diffusion layer[J].Journal of the Electrochemical Society,2007(8):B823-B834. |
| [5] | Guangli He .A three-dimensional analysis of the effect of anisotropic gas diffusion layer(GDL) thermal conductivity on the heat transfer and two-phase behavior in a proton exchange membrane fuel cell(PEMFC)[J].Journal of Power Sources,2010(6):1551. |
| [6] | C.H. Min;Y.L. He;X.L. Liu .Parameter sensitivity examination and discussion of PEM fuel cell simulation model validation. Part II: Results of sensitivity analysis and validation of the model[J].Journal of Power Sources,2006(1):374-385. |
| [7] | W.Q. Tao;C.H. Min;X.L. Liu .Parameter sensitivity examination and discussion of PEM fuel cell simulation model validation. Part I. Current status of modeling research and model development[J].Journal of Power Sources,2006(1):359-373. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%