Modeling and performance analysis of branched microfluidic fuel cells with high utilization

Babaie Rizvandi, Omid and Yeşilyurt, Serhat (2019) Modeling and performance analysis of branched microfluidic fuel cells with high utilization. Electrochimica Acta . ISSN 0013-4686 (Print) 1873-3859 (Online) Published Online First http://dx.doi.org/10.1016/j.electacta.2019.06.032

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Official URL: http://dx.doi.org/10.1016/j.electacta.2019.06.032


Microfluidic fuel cells (MFCs) are effective energy conversion devices in microscales due to their simplicity and high energy density as they are based on laminar co-flow of reactants in microchannels without a separator. However, fuel utilization at practical flow rates remains as one of the important challenges. In this study, a two-dimensional (2D) model is developed based on Brinkman equations for flow, Fick's law for mass transport and Butler-Volmer equations for reaction kinetics to study MFCs and address the effects of geometric and operation parameters on the performance and fuel utilization. Commercial finite-element software, COMSOL, is used to solve coupled equations and to analyze the performance of MFCs for different Peclet numbers, concentrations of reactants and geometric variables. According to simulation results, the 2D model compares very well with the three-dimensional model based on Navier-Stokes equations and with the experimental data reported in the literature. Moreover, the model is used for the analysis of the proposed branched-channel design of microfluidic cells that improves the fuel utilization and power output of the MFC.

Item Type:Article
Uncontrolled Keywords:MFC; Fuel utilization; Branched-channel design; Brinkman equations; Hele-Shaw relation
Subjects:T Technology > TP Chemical technology > TP0155-156 Chemical engineering
ID Code:37230
Deposited By:Serhat Yeşilyurt
Deposited On:25 Aug 2019 21:52
Last Modified:25 Aug 2019 21:52

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