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Performance analysis of microfluidic fuel cells with various inlet locations and multiple compartments

机译：具有不同入口位置和多个隔室的微流控燃料电池性能分析

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Computational evaluation of three design modifications of a membraneless microfluidic fuel cell (MMFC), i.e., inlets located midway along the microchannel, multiple compartments in the channel cross section, and a multi-stream (oxidant-fuel-oxidant) configuration, is performed in this work. The first two modifications are novel concepts proposed in this work. These adjustments to the microchannel are introduced to decrease the negative effects caused by the increased channel length, width, and height on the performance of MMFCs. Formic acid and oxygen are dissolved in sulfuric acid solution as the fuel and oxidant, respectively. Simulations are executed by employing three-dimensional Navier-Stokes equations and mass transport equation for the analyses of flow and species concentration. The electro-chemical reaction is modeled using Butler-Volmer equations. Based on the study that investigated the inlet location, inlets placed at the center of the microchannel are shown to be the best option among the selected inlet positions. Additionally, the multi-compartment configuration enhances the current density by as much as three times compared to a simple square microchannel.
机译：对无膜微流控燃料电池（MMFC）的三种设计修改进行计算评估，即沿微通道位于中间的入口，通道横截面中的多个隔室以及多流（氧化剂-燃料-氧化剂）配置。这项工作。前两个修改是这项工作中提出的新颖概念。引入了对微通道的这些调整，以减少由于通道长度，宽度和高度增加对MMFC性能造成的负面影响。甲酸和氧气分别溶解在硫酸溶液中作为燃料和氧化剂。通过使用三维Navier-Stokes方程和质量传输方程进行流量和物种浓度分析，进行模拟。使用Butler-Volmer方程对电化学反应进行建模。根据调查入口位置的研究，显示在微通道中心的入口是所选入口位置中的最佳选择。另外，与一个简单的方形微通道相比，多隔室配置将电流密度提高了三倍之多。

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