车用燃料电池阴极系统特性

郭爱; 李奇; 陈维荣; 刘志祥

doi:10.3969/j.issn.0258-2724.2013.06.013

车用燃料电池阴极系统特性

doi: 10.3969/j.issn.0258-2724.2013.06.013

基金项目:

国家自然科学基金资助项目（51177138）

高等学校博士学科点专项科研基金资助项目（20100184110015）

四川省科技计划资助项目（2012HH0007）

详细信息

作者简介:
郭爱（1970-），女，博士研究生，研究方向为大功率燃料电池系统建模与控制，E-mail：634576728@qq.com

通讯作者:
陈维荣（1965-），男，教授，博士，博士生导师，研究方向为新能源、智能信息处理、智能监测技术等，电话：028-87600786，E-mail：wrchen@home.swjtu.edu.cn

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出版历程
- 收稿日期: 2012-05-07
- 刊出日期: 2013-12-25

Characteristics of Cathode System in Fuel Cells for Electric Vehicles

摘要

摘要: 为了提高车用燃料电池效率，利用物质守恒定律、理想气体方程以及二维插值法，建立了含有双螺杆压缩机的阴极系统模型，讨论了根据压缩机转速、压缩比计算其流量和功耗的方法，分析了环境因素对压缩机的影响以及阴极流体特性、过氧比特性.研究结果表明：在设定条件下，随过氧比变化，系统输出功率和效率的变化规律一致，最优过氧比为2.5，电能利用效率随过氧比增大呈单调下降趋势；工作温度升高能够提高系统输出功率，但会使系统电能利用效率有微弱降低，工作温度由60 ℃升到80 ℃时，系统输出功率增长5.03%，电能利用效率降低0.57%.
- 燃料电池 /
- 电动车辆 /
- 双螺杆压缩机 /
- 过氧比 /
- 阴极系统
Abstract: To improve the efficiency of fuel cells for vehicles, a cathode system model with a twin screw compressor was built by mass conservation, ideal gas law, and two-dimensional interpolation method. The methods to compute the air flow rate and the power of the compressor were discussed according to its rotational speed and pressure ratio. Based on the cathode system model, the influences of ambient factors on the cathode flow property and oxygen excess ratio (OER) were studied. Simulation results show that the output power and the efficiency change with the change of OER in the same way under the set conditions, and the optimal value of OER is 2.5, while the electrical efficiency decreases with OER increasing. In addition, elevated stack temperature will result in an increase in output power and a slight decrease in electrical efficiency. When the temperature elevates from 60 ℃ to 80 ℃, the output power increases by 5.03% and the electrical efficiency decreases by 0.57%.
- fuel cell /
- electric vehicles /
- twin screw compressor /
- oxygen excess ratio /
- cathode system

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