| 燃料电池阴极相变临界电流模拟 |
| |
| 引用本文： | 叶芳,徐榕,郭航,马重芳,汪茂海.燃料电池阴极相变临界电流模拟[J].工程热物理学报,2006,27(1):94-96. |
| |
| 作者姓名： | 叶芳 徐榕 郭航 马重芳 汪茂海 |
| |
| 作者单位： | 北京工业大学环境与能源工程学院,传热强化与过程节能教育部重点实验室,传热与能源利用北京市重点实验室,北京,100022 |
| |
| 基金项目： | 中国科学院资助项目;中-德合作项目;北京工业大学校科研和教改项目;北京工业大学校科研和教改项目 |
| |
| 摘 要： | 本文根据直接甲醇燃料电池(DMFCs)阴极运行工况特性,考虑一个简单的一维模型,分析水蒸气饱和凝结成水的条件,从而得到电池阴极从单相流动到两相流动的临界电流值。分析结果表明:阴极气体进口速度增大使临界电流密度增大;临界电流随阴极气体进口相对湿度的增加而线性下降;临界电流随流道变长而减小;电池运行温度高有利于提高电池的临界电流。
|
| 关 键 词： | 燃料电池 相变 临界电流 模拟 |
| 文章编号： | 0253-231X(2006)01-0094-03 |
| 修稿时间： | 2005年3月15日 |
CATHODE PHASE CHANGE THRESHOLD CURRENT DENSITY SIMULATION OF FUEL CELLS |
| |
| YE Fang,XU Rong,GUO Hang,MA Chong-Fang,WANG Mao-Hai.CATHODE PHASE CHANGE THRESHOLD CURRENT DENSITY SIMULATION OF FUEL CELLS[J].Journal of Engineering Thermophysics,2006,27(1):94-96. |
| |
| Authors: | YE Fang XU Rong GUO Hang MA Chong-Fang WANG Mao-Hai |
| |
| Abstract: | A simple, one-dimension numerical simulation approach is presented to evaluation Director Methanol Fuel Cells (DMFCs). The model is applied to simulate the cathode phase change threshold current density of a DMFC. Considering the water generation rate, water transport process and condensation of the fuel cell air cathode, a threshold current density can be identified. The simulative results reveal that: when the air velocity at he cathode inlet is increased, the threshold current density is increased, too; when the relative humidity of gas at the inlet is increase, the threshold current density is linearly decreased; longer cathode length and lower operating temperature correspond with lower threshold current density. |
| |
| Keywords: | fuel cell phase change threshold current density simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
