Modeling and experimental validation of water mass balance in a PEM fuel cell stack

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Abstract

Polymer electrolyte membrane (PEM) fuel cells require good hydration in order to deliver high performance and ensure long life operation. Water is essential for proton conductivity in the membrane which increases by nearly six orders of magnitude from dry to fully hydrated. Adequate water management in PEM fuel cell is crucial in order to avoid an imbalance between water production and water removal from the fuel cell.

In the present study, a novel mathematical zero-dimensional model has been formulated for the water mass balance and hydration of a polymer electrolyte membrane. This model incorporates all the essential fundamental physical and electrochemical processes occurring in the membrane electrolyte and considers the water adsorption/desorption phenomena in the membrane. The effect of diffusivity model, surface roughness and water content driving force is considered. The model is validated against experimental data. In the results it is shown that the fuel cell water balance calculated by this model shows better fit with experimental data-points compared with model where only steady state operation were considered. We conclude that this discrepancy is due a different rate of water transport when membrane absorption/ desorption is considered in the model. The model becomes useful in system modelling when studying fuel cells in dynamic conditions.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number4
Pages (from-to)3079-3092
Number of pages14
ISSN0360-3199
DOIs
Publication statusPublished - Jan 2016

Fingerprint

mass balance
Proton exchange membrane fuel cells (PEMFC)
fuel cells
electrolytes
membranes
polymers
water
Water
Membranes
Fuel cells
hydration
Hydration
desorption
Desorption
water balance
Electrolytes
water management
Proton conductivity
Water management
moisture content

Keywords

  • PEM fuel cell
  • Membrane hydration
  • Water balance

Cite this

@article{571c46548dcc4e28a62cc09f8013662f,
title = "Modeling and experimental validation of water mass balance in a PEM fuel cell stack",
abstract = "Polymer electrolyte membrane (PEM) fuel cells require good hydration in order to deliver high performance and ensure long life operation. Water is essential for proton conductivity in the membrane which increases by nearly six orders of magnitude from dry to fully hydrated. Adequate water management in PEM fuel cell is crucial in order to avoid an imbalance between water production and water removal from the fuel cell.In the present study, a novel mathematical zero-dimensional model has been formulated for the water mass balance and hydration of a polymer electrolyte membrane. This model incorporates all the essential fundamental physical and electrochemical processes occurring in the membrane electrolyte and considers the water adsorption/desorption phenomena in the membrane. The effect of diffusivity model, surface roughness and water content driving force is considered. The model is validated against experimental data. In the results it is shown that the fuel cell water balance calculated by this model shows better fit with experimental data-points compared with model where only steady state operation were considered. We conclude that this discrepancy is due a different rate of water transport when membrane absorption/ desorption is considered in the model. The model becomes useful in system modelling when studying fuel cells in dynamic conditions.",
keywords = "PEM fuel cell, Membrane hydration, Water balance",
author = "Vincenzo Liso and Araya, {Samuel Simon} and Olesen, {Anders Christian} and Nielsen, {Mads Pagh} and K{\ae}r, {S{\o}ren Knudsen}",
year = "2016",
month = "1",
doi = "10.1016/j.ijhydene.2015.10.095",
language = "English",
volume = "41",
pages = "3079--3092",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Pergamon Press",
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}

TY - JOUR

T1 - Modeling and experimental validation of water mass balance in a PEM fuel cell stack

AU - Liso, Vincenzo

AU - Araya, Samuel Simon

AU - Olesen, Anders Christian

AU - Nielsen, Mads Pagh

AU - Kær, Søren Knudsen

PY - 2016/1

Y1 - 2016/1

N2 - Polymer electrolyte membrane (PEM) fuel cells require good hydration in order to deliver high performance and ensure long life operation. Water is essential for proton conductivity in the membrane which increases by nearly six orders of magnitude from dry to fully hydrated. Adequate water management in PEM fuel cell is crucial in order to avoid an imbalance between water production and water removal from the fuel cell.In the present study, a novel mathematical zero-dimensional model has been formulated for the water mass balance and hydration of a polymer electrolyte membrane. This model incorporates all the essential fundamental physical and electrochemical processes occurring in the membrane electrolyte and considers the water adsorption/desorption phenomena in the membrane. The effect of diffusivity model, surface roughness and water content driving force is considered. The model is validated against experimental data. In the results it is shown that the fuel cell water balance calculated by this model shows better fit with experimental data-points compared with model where only steady state operation were considered. We conclude that this discrepancy is due a different rate of water transport when membrane absorption/ desorption is considered in the model. The model becomes useful in system modelling when studying fuel cells in dynamic conditions.

AB - Polymer electrolyte membrane (PEM) fuel cells require good hydration in order to deliver high performance and ensure long life operation. Water is essential for proton conductivity in the membrane which increases by nearly six orders of magnitude from dry to fully hydrated. Adequate water management in PEM fuel cell is crucial in order to avoid an imbalance between water production and water removal from the fuel cell.In the present study, a novel mathematical zero-dimensional model has been formulated for the water mass balance and hydration of a polymer electrolyte membrane. This model incorporates all the essential fundamental physical and electrochemical processes occurring in the membrane electrolyte and considers the water adsorption/desorption phenomena in the membrane. The effect of diffusivity model, surface roughness and water content driving force is considered. The model is validated against experimental data. In the results it is shown that the fuel cell water balance calculated by this model shows better fit with experimental data-points compared with model where only steady state operation were considered. We conclude that this discrepancy is due a different rate of water transport when membrane absorption/ desorption is considered in the model. The model becomes useful in system modelling when studying fuel cells in dynamic conditions.

KW - PEM fuel cell

KW - Membrane hydration

KW - Water balance

U2 - 10.1016/j.ijhydene.2015.10.095

DO - 10.1016/j.ijhydene.2015.10.095

M3 - Journal article

VL - 41

SP - 3079

EP - 3092

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 4

ER -