|
|||||
|
|
| PEM燃料电池中的两相传质及其影响 | |
| 引用本文： | 孙红,郭烈锦,刘洪潭,张广升.PEM燃料电池中的两相传质及其影响[J].工程热物理学报,2006,27(2):262-264. |
| 作者姓名： | 孙红 郭烈锦 刘洪潭 张广升 |
| 作者单位： | 1. 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049;沈阳建筑大学交通与机械工程学院,辽宁,沈阳,110168 2. 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049 3. 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049;Department of Aerospace and Mechanical Engineering, University of Miami, Coral Gables, FL 33124, USA |
| 基金项目： | 国家自然科学基金;科技部科研项目 |
| 摘 要： | 建立了一个新的二维、两相流模型来研究质子交换膜(PEM)燃料电池中的两相传质及其对质子膜阻抗和阴极性能的影响。模型不仅将催化剂层(CL)包含在电极中,还考虑了电池中相变及其对传质的影响。模型可同时使用在电池的阴极和阳极。主要模拟了电池阴极中两相传质、质子膜阻抗、阴极有效孔隙率和电流密度。模拟结果显示,提高加湿温度可以降低质子膜的阻抗,但过高的加湿温度会降低阴极气体扩散层(GDL)的有效孔隙率,降低阴极的性能。 |
| 关 键 词： | 燃料电池 质子交换膜 两相流 传质 |
| 文章编号： | 0253-231X(2006)02-0262-03 |
| 修稿时间： | 2005年11月24 |
TWO-PHASE MASS TRANSPORT IN PEM FUEL CELL AND ITS EFFECTS |
|
| SUN Hong,GUO Lie-Jin,LIU Hong-Tan,ZHANG Guang-Sheng.TWO-PHASE MASS TRANSPORT IN PEM FUEL CELL AND ITS EFFECTS[J].Journal of Engineering Thermophysics,2006,27(2):262-264. | |
| Authors: | SUN Hong GUO Lie-Jin LIU Hong-Tan ZHANG Guang-Sheng |
| Abstract: | A new 2D two-phase flow model was developed to study the two-phase mass transport in PEM fuel cells ant its effects on membrane resistance and cathode performance. In this model, catalyst layers were included in the electrodes. Phase change and its effects on mass transport in the fuel cell were considered. The model can be used for both the anode and the cathode. In this paper, twophase flow and mass transport in the cathode, membrane resistance, effective porosity of cathode and current density distribution were simulated. Simulation results show that increasing humidification temperature decreases the membrane resistance, but excessive humidification temperature can decrease the effective porosity of GDL in cathode, and then decrease the cathode performance. |
| Keywords: | fuel cell proton exchange membrane (PEM) two-phase flow mass transport |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |