Neutron imaging investigation of liquid water distribution in and the performance of a PEM fuel cell☆

Park, J.; Li, Xianguo; Tran, Tuan Diep; Abdel-Baset, Tarek; Hussey, Daniel S.; Jacobson, David L.; Arif, Muhammad

doi:10.1016/j.ijhydene.2008.03.019

Cited by 97 publications

(53 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This technique was later widely used to study water transport in gas channels under various fuel cell operating conditions [20][21][22][23][24][25][26]. Neutron radiography provided another in-situ visualization technique and was utilized by a number of groups to visualize and quantify water retention in the GDL, under the lands, and in the gas channels [27][28][29][30]. Higher water retention was found at the U-bends and under the lands of the serpentine channels.…”

Section: Introductionmentioning

confidence: 99%

Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

Kandlikar

Rao

et al. 2010

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

Kandlikar

Rao

et al. 2010

View full text Add to dashboard Cite

“…A number of visualisation techniques were applied to monitor the water distribution and transport in different parts of PEMFC including fluorescence microscopy [125], Environmental Scanning Electron Microscope (ESEM) [88,126], X-Ray radiography [127][128][129][130][131][132][133], X-Ray tomography [134], neutron radiography [135][136][137], magnetic resonance [138], and video cameras [139][140][141][142][143]. An overview of these experimental techniques can be found in [144,145].…”

Section: Water Distribution and Transportmentioning

confidence: 99%

“…The simulations of [154] using mean value model (MVM) confirmed that the capillary force is the main mechanism to drive the water flux within the GDL. The distribution of the liquid water is strongly affected by the geometry of the GDL structure [150] and weakly by the cross leakage gas flow streams [136]. Water tends to accumulate initially more under ribs or lands than under channels [130,131,149,153] which is probably expected since air will have less access and longer diffusion length to reach those regions and remove liquid water.…”

Section: Water Distribution and Transportmentioning

confidence: 99%

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Ous

Arcoumanis

2013

Journal of Power Sources

133

View full text Add to dashboard Cite

This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractThis review paper summarises the key aspects of Proton Exchange Membrane Fuel Cell (PEMFC) degradation that are associated with water formation, retention, accumulation, and transport mechanisms within the cell. Issues related to loss of active surface area of the catalyst, ionomer dissolution, membrane swelling, ice formation, corrosion, and contamination are also addressed and discussed. The impact of each of these water mechanisms on cell performance and durability was found to be different and to vary according to the design of the cell and its operating conditions. For example, the presence of liquid water within Membrane Electrode Assembly (MEA), as a result of water accumulation, can be detrimental if the operating temperature of the cell drops to sub-freezing.The volume expansion of liquid water due to ice formation can damage the morphology of different parts of the cell and may shorten its life-time. This can be more serious, for example, during the water transport mechanism where migration of Pt particles from the catalyst may take place after detachment from the carbon support. Furthermore, the effect of transport mechanism could be augmented if humid reactant gases containing impurities poison the membrane, leading to the same outcome as water retention or accumulation.Overall, the impact of water mechanisms can be classified as aging or catastrophic. Aging has a longterm impact over the duration of the PEMFC life-time whereas in the catastrophic mechanism the impact is immediate. The conversion of cell residual water into ice at sub-freezing temperatures by the water retention/ accumulation mechanism and the access of poisoning contaminants through the water transport mechanism are considered to fall into the catastrophic category. The effect of water mechanisms on PEMFC degradation can be reduced or even eliminated by (a) using advanced materials for improving the electrical, chemical and mechanical stability of the cell components against deterioration, and (b) implementing effective strategies for water management in the cell.

show abstract

“…Liquid water must be efficiently evacuated from the cell, in order to ensure an adequate path for the oxygen to reach the catalyst sites. The two-phase flow can be visualized by means of advanced experimental techniques such as neutron imaging (Park et al, 2008;Wu et al, 2008b), but again Computational Fluid Dynamics is used by many researchers for the investigation of twophase flow in fuel cells, although it is one of the most complex modelling tasks currently (Wang, 2004). Fig.6 presents results for the liquid water concentration in a fuel cell with parallel flow field.…”

Section: Multiphase Flow In the Bipolar Plate Channelsmentioning

confidence: 99%

Fluid Flow in Polymer Electrolyte Membrane Fuel Cells

Iranzo¹,

Salva²,

Rosa³

2012

Fluid Dynamics, Computational Modeling and Applications

View full text Add to dashboard Cite

Neutron imaging investigation of liquid water distribution in and the performance of a PEM fuel cell☆

Cited by 97 publications

References 30 publications

Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

Degradation aspects of water formation and transport in Proton Exchange Membrane Fuel Cell: A review

Fluid Flow in Polymer Electrolyte Membrane Fuel Cells

Contact Info

Product

Resources

About