In this investigation, water in a s

在这项研究中，单电池质子交换膜（PEM）燃料电池中的水<br>使用饱和氢气和干燥空气进行管理。该实验是在40、50和60°C的温度以及阳极和阴极气体入口的压力分别为1和1.5 bar下进行的。氢气和空气的进料速度分别固定为3和6。达到稳态条件后，<br>测量沿单个蛇形气体通道的相对湿度。从实验数据，<br>基于膜水合模型表征了水的输送特性。电渗<br>阻力系数，水扩散系数，膜离子电导率和水反扩散通量受到PEM燃料电池膜中水含量的显着影响。水含量取决于沿气体通道的相对湿度曲线。在这项研究中，水的反向扩散通量为负值<br>；因此，没有发生水从阴极到阳极的传输。这种<br>现象是由于阳极和<br>阴极之间的水浓度梯度较大所致。因此，该策略成功地防止了PEM燃料电池中的溢流。

在本次调查中，单细胞质子交换膜（PEM）燃料电池中的水<br>使用饱和氢气和干燥空气进行管理。实验是在40、50和60摄氏度的温度下进行的，在阳极和阴极气入口的1和1.5 bar压力下进行。氢气和空气的馈送速度分别固定在3和6。达到稳态条件后，沿单<br>测量蛇纹气体通道。从实验数据，水运<br>基于膜水化模型的特性特征。电渗透<br>2000年PEM燃料电池膜中含水量的阻力系数、水扩散系数、膜离子电导率和水回熔通量等对水含量有显著影响。含水量取决于沿气体通道的相对湿度剖面。在本次调查中，水回扩散通量的负值为<br>测量;因此，水从阴极到阳极的运输没有发生。这<br>现象是由于阳极和阳极之间的水浓度梯度大<br>阴极。因此，该策略成功地防止了PEM燃料电池的泛滥。

In this investigation, water in a single-cell proton exchange membrane (PEM) fuel cell wasmanaged using saturated hydrogen and dry air. The experiment was conducted at temperatures of 40, 50 and 60
C and pressures of 1 and 1.5 bar at both the anode and cathode gas inlets. The feed velocities of hydrogen and air were fixed at 3 and 6 , respectively. After reaching steady-state conditions, the relative humidity along the singleserpentine gas channel was measured. From the experimental data, water transportproperties were characterized based on a membrane hydration model. The electro-osmoticdrag coefficient, water diffusion coefficient, membrane ionic conductivity and water backdiffusion flux were significantly influenced by the water content in the membrane of the PEM fuel cell. The water content depended on the relative humidity profile along the gas channel. In this investigation, a negative value for the water back-diffusion flux wasmeasured; thus, the transport of water from the cathode to the anode did not occur. Thisphenomenon was due to the large water concentration gradient between the anode andcathode. Therefore, this strategy successfully prevented flooding in the PEM fuel cell.<br>