Experimental study on the effect of reactant flow arrangements on the current distribution in proton exchange membrane fuel cells

Alaefour, Ibrahim; Karimi, Gholamreza; Jiao, Kui; Shakhshir, Saher Al; Li, X.

doi:10.1016/j.electacta.2010.11.002

Cited by 43 publications

(24 citation statements)

References 31 publications

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“…In what follows, the dynamic response and characteristics in the local current density measured will be presented only for segments with even numbers as illustrated in Figure A. This is considered sufficient to extrapolate useful information for the entire cell without elaborate presentation of all the data available, because our previous work showed that under steady state, the local current density with coflow arrangement for the anode and cathode gas stream decreases monotonically along the flow channels . Therefore, all the results presented in this study are for the coflow arrangement of the reactant gases.…”

Section: Resultsmentioning

confidence: 99%

Dynamic characteristics of the local current density in proton exchange membrane fuel cells with different operating conditions

Alaefour

2018

Int J Energy Res

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Summary The present study reports an experimental investigation regarding the dynamic characteristics of local current density in proton exchange membrane fuel cells during dynamic operation, important for mobile applications, by using segmented current collector method. The results indicate that for fully humidified operation, the local current density fluctuates more intensely when the cell potential is reduced, corresponding to an increase in the average cell current density (or load), whereas it is reduced considerably when the air stoichiometry is increased. Fluctuations in the local current density are lower near the flow channel inlet region and higher near the channel exit region. Operation at higher pressures enhances the cell performance, as expected, but results into severer fluctuations in the local current density. Further, it is observed that both the magnitude and the frequency of the fluctuations for the local current density are strongly influenced by the humidity condition in the reactant gas streams, and partially humidified operation results in significant fluctuations in regions near the channel inlet, suggesting close relation to the presence, distribution, and transport of water in the cell structure.

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Section: Resultsmentioning

confidence: 99%

Dynamic characteristics of the local current density in proton exchange membrane fuel cells with different operating conditions

Alaefour

2018

Int J Energy Res

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“…With air as the chosen oxidant, interdigitated flow channels perform almost as well as serpentine or pin-type channels. I. Alaefour et al investigated local current distributions for a PEMFC using a serpentine flow field and three different flow arrangements for the anode and cathode streams, including co-flow, cross-flow, and counter-flow [22]. The counterflow arrangement was shown to yield the most uniform current density distribution, whereas the co-flow arrangement produced considerable variation in the current density from the reactant gas stream inlet to the exit.…”

Section: Introductionmentioning

confidence: 95%

A segmented cell approach for studying the effects of serpentine flow field parameters on PEMFC current distribution

Reshetenko

Bender

Bethune

et al. 2013

Electrochimica Acta

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“…They reported that the temperature, water content, and current density distributions become more uniform for serpentine flow‐field designs with shorter path lengths or a larger number of channels. Alaefour et al 11. investigated local current distributions in a PEMFC with a serpentine flow field and three different flow arrangements including co‐flow, cross‐flow, and counter‐flow.…”

Section: Intensification Techniquesmentioning

confidence: 99%

A New Concept for High‐Performance Fuel Cell Design with Controlled Component Mixing using Jet Flow

Данилов

Denayer

2014

Energy Tech

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A new concept is proposed for a high‐performance fuel cell design. The concept is based on the intensification of mass transfer processes due to implementing multiple contact zones with jet flow and preventing the intermixing of the reactants and products. A proof of concept was performed by comparing the new fuel cell design with conventional proton‐exchange membrane fuel cell (PEMFC) containing a standard membrane electrode assembly (MEA) and gas diffusion layer (GDL). It is shown that the application of the new concept for flow‐field design provides an increase of the fuel cell performance of up to 40 % without humidification and flooding problems.

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Experimental study on the effect of reactant flow arrangements on the current distribution in proton exchange membrane fuel cells

Cited by 43 publications

References 31 publications

Dynamic characteristics of the local current density in proton exchange membrane fuel cells with different operating conditions

Dynamic characteristics of the local current density in proton exchange membrane fuel cells with different operating conditions

A segmented cell approach for studying the effects of serpentine flow field parameters on PEMFC current distribution

A New Concept for High‐Performance Fuel Cell Design with Controlled Component Mixing using Jet Flow

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