储能科学与技术 ›› 2020, Vol. 9 ›› Issue (1): 152-161.doi: 10.19799/j.cnki.2095-4239.2019.0152

• 储能系统与工程 • 上一篇    下一篇

基于化学吸/脱附固态储氢的PEMFC动力系统耦合特性研究

闫红丽1, 敬志良1, 陆佐伟1, 王玉琪2, 吴震3()   

  1. 1. 西安交通大学城市学院机械工程系,陕西 西安 710018
    2. 西北大学化工学院,陕西 西安 710069
    3. 西安交通大学化学工程与技术学院,陕西 西安 710049
  • 收稿日期:2019-07-04 修回日期:2019-07-22 出版日期:2020-01-05 发布日期:2020-01-10
  • 作者简介:吴震,副教授,研究方向为氢能系统,E-mail:wuz2015@mail.xjtu.edu.cn
  • 基金资助:
    陕西省自然科学基金项目(2017JQ5059)

Study on coupling characteristics of PEMFC power generation system using chemisorption as solid-state hydrogen storage

YAN Hongli1, JING Zhiliang1, LU Zuowei1, WANG Yuqi2, WU Zhen3()   

  1. 1. Department of Mechanical Engineering, Xi 'an Jiaotong University City College, Xi 'an 710018, Shaanxi, China
    2. School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China
    3. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
  • Received:2019-07-04 Revised:2019-07-22 Online:2020-01-05 Published:2020-01-10

摘要:

基于氢燃料电池PEMFC的动力系统清洁高效,PEMFC动力系统主要由燃料供应系统和PEMFC两大部分组成。高效、安全以及经济的储氢技术仍是制约其规模化应用的核心问题。固态储氢具有高储氢量、安全以及可逆性能好的特点,其作为氢源系统,供氢特性影响着PEMFC动力系统的输出特性。本文建立了基于化学吸/脱附固态储氢的氢源反应器和PEMFC的数学模型,并使用MATLAB/SIMULINK软件建立了耦合固态储氢的PEMFC动力系统的仿真模型,详细分析了反应器供氢压力、阴极氧气压力、燃料电池温度、质子交换膜面积等关键操作和设计参数对氢动力系统输出特性的影响。研究结果表明:提高储氢反应器温度可以提高PEMFC供氢压力,进而提高了其输出功率;同时升高PEMFC温度、增大质子交换膜面积和供氧压力都能提高动力系统的输出功率,相应的功率敏感因数为1.81、0.73和0.036。

关键词: 氢燃料电池, 储氢反应器, 数值仿真, 参数优化

Abstract:

The power generation system based on PEMFC has been proven to be clean and efficient, which mainly consists of fuel supply and fuel cell subsystems. High-efficiency, safe and economic hydrogen storage technology is still the crucial factor affecting the large-scale practical applications of the PEMFC power generation system. The solid-state hydrogen storage method by chemisorption has the advantages of high capacity, good safety, and reversibility, thus being widely used as hydrogen sources and generally affecting the output properties of the power system. In this work, the models of the solid-state hydrogen storage reactor based on metal hydride and the PEMFC are established. Besides, the coupling process between the reactor and the fuel cell is modeled by MATLAB/SIMULINK to investigate the coupling characteristics. Based on the model, the effects of the important operating and design parameters, including hydrogen pressure, oxygen pressure, fuel cell temperature, and proton exchange membrane area, on the output performance of the power generation system are investigated. The simulation results show that the elevated temperature of the hydrogen storage reactor facilitates the improvement of power output of the system. This is because that the higher reaction temperature results in the higher hydrogen supply pressure, accordingly enhancing the fuel cell performance. In addition, the output power of the system also increases with the increase of the hydrogen pressure, fuel cell temperature and proton exchange membrane area. The corresponding power sensitivity coefficient of the three parameters is calculated to be 1.81, 0.73, and 0.036, respectively.

Key words: fuel cell, hydrogen storage reactor, numerical simulation, parameter optimization

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