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Performance improvement of the circular tubular PEMFC by using different architectures and number of layers

机译：通过使用不同的体系结构和层数来提高圆形管状PEMFC的性能

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摘要

The effects of arrangement and number of Membrane, Catalyst layer (CL) and Gas Diffusion layer (GDL) is investigated in present study. A full three-dimensional model was developed for tubular shaped PEMFC and the distribution of reactant concentration along anode and cathode channels, current density, power consumption and production were studied through computational Fluid dynamics (CFD). In order to do so, five arrangements of the tubular-shaped PEMFC namely: circular peripheral (CP), circular with two channels (C2C), circular with four channels (C4C), circular with six channels (C6C) and circular with eight channels (C8C) are presented. Comparison was made for new arrangements of layers, for the same active area and input mass flow in the anode and cathode. The results of polarization curve and power density shows that via increasing the number of layers, and thereby reducing the length of the fuel cell, more reactants are consumed along the tubular-shaped PEMFC. Among the five new arrangements, the CP case due to having high flow velocity for the same flow rate, has lower consumption along the channel and demonstrates undesirable results. Also in the dual-channel case (C2C) the core of the reacting flow is far from the reaction location (i.e. CL) therefor showed the lowest consumption and thus lowest power density. Whereas the eight-channel (C8C) configuration because of the appropriate distance between Membrane, CL and GDL layers and the core of the flow, increases the power output and reduces the cost, simultaneously due to shortest length in comparison to other cases. The results of present study can be employed for the manufacturing of new tubular-shaped PEMFC. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文研究了膜，催化剂层（CL）和气体扩散层（GDL）的排列和数量的影响。建立了管状PEMFC的完整三维模型，并通过计算流体动力学（CFD）研究了反应物浓度沿阳极和阴极通道的分布，电流密度，功耗和产量。为此，采用了五种管状PEMFC，即：圆形外围设备（CP），具有两个通道的圆形（C2C），具有四个通道的圆形（C4C），具有六个通道的圆形（C6C）和具有八个通道的圆形（C8C）。对于在阳极和阴极中相同的有效面积和输入质量流量，对新的层布置进行了比较。极化曲线和功率密度的结果表明，通过增加层数，从而减少燃料电池的长度，沿着管状PEMFC消耗了更多的反应物。在这五个新的布置中，CP壳体由于在相同流速下具有较高的流速，因此沿通道的消耗较低，并显示出不良的结果。同样在双通道情况下（C2C），反应流的核心远离反应位置（即CL），因此显示出最低的消耗，因此最低的功率密度。鉴于八层（C8C）配置由于膜层，CL和GDL层与流芯之间的适当距离，与其他情况相比，由于长度最短，同时增加了功率输出并降低了成本。本研究的结果可用于制造新型管状PEMFC。 （C）2016 Elsevier Ltd.保留所有权利。

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