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Model development and optimization of operating conditions to maximize PEMFC performance by response surface methodology

机译：通过响应面方法进行模型开发和运行条件优化以最大化PEMFC性能

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摘要

Optimization of operating conditions to obtain maximum power in PEMFCs could have a significant role to reduce the costs of this emerging technology. In the present experimental study, a single serpentine PEMFC is used to investigate the effects of operating conditions on the electrical power production of the cell. Four significant parameters including cathode stoichiometry, anode stoichiometry, gases inlet temperature, and cathode relative humidity are studied using Design of Experiment (DOE) to obtain an optimal power. Central composite second order Response Surface Methodology (RSM) is used to model the relationship between goal function (power) and considered input parameters (operating conditions). Using this statistical-mathematical method leads to obtain a second-order equation for the cell power. This model considers interactions and quadratic effects of different operating conditions and predicts the maximum or minimum power production over the entire working range of the parameters. In this range, high stoichiometry of cathode and low stoichiometry of anode results in the minimum cell power and contrary the medium range of fuel and oxidant stoichiometry leads to the maximum power. Results show that there is an optimum value for the anode stoichiometry, cathode stoichiometry and relative humidity to reach the best performance. The predictions of the model are evaluated by experimental tests and they are in a good agreement for different ranges of the parameters. (C) 2015 Elsevier Ltd. All rights reserved.
机译：优化运行条件以在PEMFC中获得最大功率可能会在降低这项新兴技术的成本方面发挥重要作用。在本实验研究中，使用单个蛇形PEMFC来研究操作条件对电池电力产生的影响。使用实验设计（DOE）研究了四个重要参数，包括阴极化学计量，阳极化学计量，进气温度和阴极相对湿度，以获得最佳功率。中央复合二阶响应面方法论（RSM）用于对目标函数（功率）和考虑的输入参数（工作条件）之间的关系进行建模。使用这种统计数学方法可以得出电池功率的二阶方程。该模型考虑了不同工作条件的相互作用和二次效应，并预测了参数整个工作范围内的最大或最小发电量。在此范围内，阴极的高化学计量比和阳极的低化学计量比导致最小的电池功率，相反，燃料和氧化剂的化学计量比的中等范围会导致最大功率。结果表明，阳极化学计量，阴极化学计量和相对湿度存在最佳值，以达到最佳性能。该模型的预测通过实验测试进行了评估，并且对于不同参数范围都非常吻合。 （C）2015 Elsevier Ltd.保留所有权利。

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