An investigation of convective transport in micro proton-exchange membrane fuel cells

Rawool, A. S.; Mitra, Sushanta K.; Pharoah, Jon G.

doi:10.1016/j.jpowsour.2006.07.067

Cited by 14 publications

(9 citation statements)

References 10 publications

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“…One point raised by Lopes et al concerns the contribution of secondary flows, in the form of vortices, to the distribution of reactants in the catalyst layer, as have been previously suggested using laser Doppler anemometry in an operating fuel cell [32]. the MPS, which is consistent to previous results [7]. The information in Figure 7 correlates with the observed features in the partial pressure surfaces, experimental and simulated, corroborating the idea that secondary flows are important to describe the observed reactant spatial distribution [6].…”

Section: Implications For An Actual Fuel Cellsupporting

confidence: 80%

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Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

et al. 2017

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Recent experimental data on a fuel cell-like system revealed insights on the fluid flow in both free and porous media. A computational model is used to investigate the momentum and species transport in such system, solved using the finite elements method. The model consists of a stationary, isothermal, diluted species transport in free and porous media flow. The momentum transport is treated using different formulations, namely Stokes-Darcy, Darcy-Brinkman, and a hybrid StokesBrinkman formulations. The species transport is given by the advection equation for a reactant diluted in air. The formulations are compared to each other and to the available experimental data, where it is concluded that the Darcy-Brinkman formulation reproduces the data appropriately. The validated model is used to investigate the contribution of convection in reactant transport in porous media of fuel cells. Convective transport provides a major contribution to reactant distribution in the so-called diffusion media. For a serpentine channel and flow with Re = 260 to 590, convection accounts for 29 to 58% of total reactant transport to the catalyst

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Section: Implications For An Actual Fuel Cellsupporting

confidence: 80%

“…Indeed, it is seen that SD is widely used in fuel cell models, e.g. Rawool and co-workers [7] and more recently described in [8], and also for related systems, for instance the work of Knehr and collaborators in vanadium flow cells [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

et al. 2017

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“…As a reference mesh, a 0.05 × 0.05 × 0.05 mm 3 cubical element in the flow channels of Mesh 1 is purposely used. Such fine mesh has not been used anywhere else in the literature except in a micro-channel of a micro PEM fuel cell [23]- [26]. Keeping the mesh in the other two directions the same, the mesh in the porous layers are coarsened.…”

Section: Through-plane Mesh (Study 1)mentioning

confidence: 99%

An effective mesh strategy for CFD modelling of polymer electrolyte membrane fuel cells

Choopanya

Yang

2016

International Journal of Hydrogen Energy

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“…and porosity of the GDL [36][37][38][39], pore size distribution [40][41][42], gas permeability [33,43,44], water transport parameters [45][46][47][48][49], and effects of compression [50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Effect of Inhomogeneous Compression of GDL on Local Transport Phenomena in a PEM Fuel Cell

Nitta¹,

Karvonen²,

Himanen

et al. 2008

Fuel Cells

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The effects of inhomogeneous compression of gas diffusion layers (GDLs) on local transport phenomena within a polymer electrolyte membrane (PEM) fuel cell were studied theoretically. The inhomogeneous compression induced by the rib/channel structure of the flow field plate causes partial deformation of the GDLs and significantly affects component parameters. The results suggest that inhomogeneous compression does not significantly affect the polarisation behaviour or gas–phase mass transport. However, the effect of inhomogeneous compression on the current density distribution is evident. Local current density under the channel was substantially smaller than that under the rib when inhomogeneous compression was taken into account, while the current density distribution was fairly uniform for the model which excluded the effect of inhomogeneous compression. This is caused by the changes in the selective current path, which is determined by the combination of conductivities of components and contact resistance between them. Despite the highly uneven current distribution and variation in material parametres as a function of GDL thickness, the temperature profile was relatively even over the active area for both the modelled cases, contrary to predictions in previous studies. However, an abnormally high current density significantly accelerates deterioration of the membrane and is critical in terms of cell durability. Therefore, fuel cells should be carefully designed to minimise the harmful effects of inhomogeneous compression.

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An investigation of convective transport in micro proton-exchange membrane fuel cells

Cited by 14 publications

References 10 publications

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

An effective mesh strategy for CFD modelling of polymer electrolyte membrane fuel cells

Modelling the Effect of Inhomogeneous Compression of GDL on Local Transport Phenomena in a PEM Fuel Cell

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