| 直接甲醇燃料电池阴极水的传输特性 |
| |
| 引用本文： | 蒋静慧,巩亮,李印实.直接甲醇燃料电池阴极水的传输特性[J].化工学报,2017,68(Z1):83-89. |
| |
| 作者姓名： | 蒋静慧 巩亮 李印实 |
| |
| 作者单位： | 1. 中国石油大学(华东)储运与建筑工程学院热能工程系, 山东 青岛 266580;
2. 西安交通大学能源与动力工程学院, 热流科学与工程教育部重点实验室, 陕西 西安 710049 |
| |
| 摘 要： | 利用COMSOL Multiphysics软件对直接甲醇燃料电池（DMFC）阴极模型进行计算，获得压力、速度、水、氧气和液态饱和度分布情况，研究扩散层在不同物理参数（如厚度、孔隙率、孔径大小和亲憎水性）下电池阴极水和氧气的传输情况，进一步建立扩散层孔隙率梯度的数学模型，研究扩散层孔隙率梯度以及支撑层参数对直接甲醇燃料电池性能和物质传输的影响。结果表明，扩散层具有大孔隙率、薄扩散层时均有利于氧气传质，可以使电池性能提高；扩散层孔隙率梯度的存在可以减轻氧气传输阻力，提高电池性能。
|
| 关 键 词： | 燃料电池 相变 多孔介质 传质 数值模拟 |
| 收稿时间： | 2017-05-15 |
| 修稿时间： | 2017-05-23 |
Transmission characteristics of cathode water in direct methanol fuel cell |
| |
| JIANG Jinghui,GONG Liang,LI Yinshi.Transmission characteristics of cathode water in direct methanol fuel cell[J].Journal of Chemical Industry and Engineering(China),2017,68(Z1):83-89. |
| |
| Authors: | JIANG Jinghui GONG Liang LI Yinshi |
| |
| Affiliation: | 1. Department of Thermal Engineering, College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;
2. MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China |
| |
| Abstract: | The characteristic of cathode water transport in direct methanol fuel cell was investigated using COMSOL Multiphysics,including the effect of the distribution of pressure,velocity,water,oxygen and liquid saturation,as well as diffusion layer under different physical parameters,such as thickness,porosity,size and hydrophobicity. A further mathematical model of diffusion layer with gradient porosity distribution was established to study the effect of porosity gradient and support layer parameters on cell performance and mass transfer. The results show that the diffusion layer with high porosity and thin layer is beneficial to oxygen transfer. The gradient porosity distribution of diffusion layer can reduce oxygen transport resistance,and thus improving the cell performance. |
| |
| Keywords: | fuel cell phase change porous media mass transfer numerical simulation |
|
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载全文 |
|
