Numerical and Experimental Analysis of Current Density Distribution and Transient Response for Polymer Electrolyte Membrane Fuel Cell

聚合物电解质膜燃料电池电流密度分布和瞬态响应的数值和实验分析

• 批准号: 11650283
• 负责人: ONDA Kazuo
• 金额: $ 2.24万
• 依托单位: TOYOHASHI UNIVERSITY OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650283/
• 关键词: solid polymer electrolyte fuel cell; measurement of current density distribution; measurement of cell transient response; numerical analysis of cell under steady-state condition; numerical analysis of cell under transient condition; 電池の過渡応答解析コード; 固体

Polymer Electrolyte Membrane Fuel Cell (PEFC), which can achieve high energy efficiency and small load on environment, is expected to apply to power sources for electric vehicles and distributed power sources. Because the ionic conductivity and electro-osmosis coefficient of the polymer electrolyte membrane (PEM) are depend on its water uptake and temperature, it is important to control the water uptake and the temperature so that FC can generate electricity uniformly, understanding the temperature distribution and water molecule behavior in PEFC.And it is also important to grasp the transient response of cell potential to load and reactant flow gas change.First, to analyze the steady state characteristics of the power generation, we developed numerical code of PEFC considering the mass, charge and energy balance, and analyzed its characteristics corresponding the experimental condition, such as cell temperature, utilization ratio, etc. Where the activation overpotential was given so a … More s to agree with the measured current-potential characteristics. As the numerical result, it was understood that the current distribution changed due to the water uptake change in PEM, which was controlled by the humidifier temperature. To verify this numerical current distribution change, we actually measured it by use of segmented electrode. The experimental result of current distribution agreed with the analytical.Next, we experimentally and numerically investigated the transient response of cell potential, quickly changing the load current and reactant gas flow rate. In case of constant H_22/O_2 flow rate, the cell potential response to the load current change was describable by the representative time of electric double layer capacitance and reaction resistance. In case of constant simulated reformed gas/air flow rate, the response time was longer because of the larger diffusive resistance. In case of constant load current, the cell potential response to the gas flow rate change was about 10 seconds due to the re-distribution of water molecule in PEM. Less

聚合物电解质膜燃料电池（PEFC）具有能量利用率高、环境负荷小等优点，有望应用于电动汽车电源和分布式电源。由于聚合物电解质膜（PEM）的离子电导率和电渗透系数取决于其吸水率和温度，因此重要的是控制吸水率和温度以使FC能够均匀地发电，了解PEFC中的温度分布和水分子行为，掌握电池电势对负载和反应物流量气体的瞬态响应也很重要首先，为了分析PEFC的稳态发电特性，我们开发了考虑质量、电荷和能量平衡的PEFC数值计算程序，并分析了与实验条件相对应的PEFC特性，如电池温度、利用率等。 ...更多信息 s与实测的电流-电位特性一致。作为数值结果，可以理解，电流分布由于PEM中的吸水量变化而改变，这由加湿器温度控制。为了验证这种数值电流分布的变化，我们实际测量它使用分段电极。电流分布的实验结果与理论分析相吻合。接下来，我们对快速改变负载电流和反应气体流量时电池电势的瞬态响应进行了实验和数值研究。在H_22/O_2流量恒定的情况下，电池电位对负载电流变化的响应可用双电层电容和反应电阻的代表时间来描述。在模拟重整气/空气流量恒定的情况下，由于扩散阻力较大，响应时间较长。在恒定负载电流的情况下，由于PEM中水分子的重新分布，电池电位对气体流速变化的响应约为10秒。少

项目成果

Takeshi Hikosaka, et. al: "System Efficiency of High-temperature Water Electrolysis by Planar Solid Oxide Electrolysis Cell"IEE Jpn. Vol.120-B, No.5. 694-703 (2000)

彦坂武，等。

村上敏夫: "固体高分子水電解セルの数値解析と電流密度分布と過電圧の測定"第40回電池討論会. 165-166 (1999)

Toshio Murakami：“固体聚合物水电解电池的数值分析以及电流密度分布和过电压的测量”第 40 届电池研讨会 165-166（1999 年）。

村上敏夫 ほか: "固体高分子水電解セルの電流密度分布の測定と数値解析"電気学会論文誌B. 120B巻2号. 256-263 (2000)

Toshio Murakami 等人：“固体聚合物水电解池中电流密度分布的测量和数值分析”日本电气工程师学会汇刊 B. 第 120B 卷，第 2. 256-263 号（2000 年）

Makoto Morita etal: "Transient Response of PEFC for Change of Load Current & Reactant Gas Flow Rate"第41回電池討論会. 66-67 (2000)

Makoto Morita 等人：“PEFC 对负载电流和反应气体流量变化的瞬态响应”第 41 届电池研讨会 66-67 (2000)。

Tetsuya Aoki, et. al: "Effect of Operation Temperature and Humidity on Generation Performance of Polyer Electrolyte Fuel Cell"National Convention Record IEE Jpn.. Vol.7. 3116-3117 (2001)

青木哲也等.