Proton exchange membrane fuel cell degradation: A parametric analysis using Computational Fluid Dynamics

Özden, Ender; Tarı, İlker

doi:10.1016/j.jpowsour.2015.11.042

Cited by 45 publications

(15 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unit of power density and current density is mW cm -2 . As shown from the polarization curves, the spiral flow-field and Ozden et al's [23] study is quite different. The main differences for two fuel cell performances are stem from the thickness of membrane and active areas.…”

Section: Polarization and Power Curvesmentioning

confidence: 67%

Investigation of Spiral Flow‐Field Design on the Performance of a PEM Fuel Cell

2017

View full text Add to dashboard Cite

Polymer exchange membrane fuel cells (PEMFCs) are promising energy converters due to their unique features with an application potential for many sectors. The performance of PEM fuel cells depends on a number of factors, one of which is suitable flow‐field design. In this study, the effect of spiral flow‐field design is investigated with computational fluid dynamics (CFD) method. The model consists of the transport phenomena in a fuel cell. Electrochemical reactions, mass, heat, energy, species transport, and potential fields equations are solved by ANSYS‐FLUENT. The polarization and power density curve, temperature, pressure, and distributions of the gases inside the flow‐fields were obtained. The results were compared with the reference geometry. Although the spiral flow‐field has considerable ohmic losses, the velocity and pressure distributions of the gases are found to be uniform. Furthermore, it is shown that the spiral flow‐field reduces the pressure drop per unit length of the flow‐field. When compared to other flow‐field designs, the spiral flow‐field is found to be quite efficient by means of auxiliary power consumption.

show abstract

Section: Polarization and Power Curvesmentioning

confidence: 67%

Investigation of Spiral Flow‐Field Design on the Performance of a PEM Fuel Cell

2017

View full text Add to dashboard Cite

show abstract

“…In the past two decades, CFD models have been extensively developed and applied to investigate factors influencing durability and degradation rates of materials determining the lifetime of fuel cells [10,[20][21][22][23][24][25][26][27]. Gidwani et al [20] studied durability and degradation of PEM fuel cells with a focus on carbon corrosion at electrodes.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of an Industrial PEM Fuel Cell with Local Degradation Effects

et al. 2020

View full text Add to dashboard Cite

The polymer electrolyte membrane (PEM) fuel cell model of a commercial software package is presented. The basic performance model is extended by two chemical degradation effects: ionomer degradation and carbon corrosion including platinum oxidation. The ionomer degradation model describes the ionomer mass loss due to hydrogen peroxide formation and subsequent attack of the ionomer by radicals. The carbon corrosion model calculates the carbon mass loss caused by carbon oxidation and the active area reduction due to platinum oxidation. The degradation models are coupled with an agglomerate model of the catalyst layer. The model is validated against measurements on an industrial cell. For these measurements, the cell is equipped with a segmented measuring board, which is used to measure the current density distribution and high frequency resistance of every segment. In order to test the predictability of the model under different operating conditions, measurements for stoichiometry and pressure variations are carried out. Calculated and measured current density distributions of the cell, aged by an accelerated stress test, are compared for the validation of the degradation model. Moreover, 3D simulation results of the fresh and aged cells are analyzed in detail and the influence of operating conditions on fuel cell aging is pointed out.

show abstract

“…The application of numerical techniques in modeling and simulation of fuel cells allowed many studies in plates design, flow channels and chemical reactions to better understand the phenomena that occurs inside the cells. The studies in interdigitated and parallel plates involving diffusion and convection of the gases , the development of new models to describe the transport phenomena , , studies of channels geometries , water management and fuel cell degradation contributed to the improvement of fuel cell performance. Jahnke et al reviews the state of the art techniques in modeling of PEMFCs, covering a wide range of phenomenon scales and the coupling between the different scales.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of PEMFC Flow Channel Cross Sections

et al. 2017

View full text Add to dashboard Cite

This paper presents a study of single‐channel proton exchange membrane fuel cells (PEMFCs) using computational modeling and simulation. For this analysis, the commercial software COMSOL Multiphysics was used to build a single‐phase isothermal and tridimensional fuel cell model. For the mathematical description of the catalyst layer, the flooded agglomerate model was implemented, and it proved to be more accurate than Butler‐Volmer model, which is the pre‐built model in the software. Such evidence was verified when comparing the polarization curves obtained using both models with an experimental curve. After definition of the model, the main objective of this study was to analyze the influence of the flow channel cross‐section in the water distribution inside the cell, studying rectangular, trapezoidal and hybrid stepped geometries. The fuel cell with stepped channel was equivalent to the trapezoidal cell in all aspects analyzed, and both provided superior water management than the rectangular cell. However, the current generation in the rectangular design was slightly higher. It was noted that the simulation of a tridimensional model provided a better understanding of the regions where higher concentrations of water can occur, and that different flow channel designs can be used to enhance water management.

show abstract

Proton exchange membrane fuel cell degradation: A parametric analysis using Computational Fluid Dynamics

Cited by 45 publications

References 41 publications

Investigation of Spiral Flow‐Field Design on the Performance of a PEM Fuel Cell

Investigation of Spiral Flow‐Field Design on the Performance of a PEM Fuel Cell

CFD Simulation of an Industrial PEM Fuel Cell with Local Degradation Effects

CFD Analysis of PEMFC Flow Channel Cross Sections

Contact Info

Product

Resources

About