Journal of The Electrochemical Society,
Journal Year:
2024,
Volume and Issue:
171(10), P. 104514 - 104514
Published: Oct. 1, 2024
To
address
the
performance
and
lifetime
limitations
of
Proton
Exchange
Membrane
Fuel
Cells,
it
is
essential
to
have
a
comprehensive
understanding
operating
heterogeneities
at
cell
scale,
requiring
test
wide
range
conditions.
avoid
experimental
constraints,
numerical
simulations
seem
be
most
viable
option.
Hence,
there
need
for
time-efficient
accurate
cell-scale
models.
In
this
intention,
previous
works
led
development
calibration
pseudo-3D
model
full-size
in
stack.
further
reduce
computation
time,
new
spatially
averaged,
multi-physics,
single-phase,
non-isothermal,
steady
state
developed
calibrated
with
results
preceding
model.
Particularly,
captures
influence
coolant
on
temperature
water
mappings
cell.
Moreover,
methodology
proposed
calibrate
electrochemical
voltage
law
membrane-electrode
assemblies.
The
emulation
local
operation
conditions
large
active
surface
area
realized
small
differential
cell,
avoiding
testing
single
cells
or
stacks.
Subsequently,
are
conducted
investigate
impact
gradient,
outlet
gas
relative
humidity.
Journal of Marine Science and Engineering,
Journal Year:
2025,
Volume and Issue:
13(4), P. 764 - 764
Published: April 11, 2025
Proton
exchange
membrane
fuel
cells
(PEMFCs)
offer
a
promising
zero-emission
power
solution
for
maritime
transportation,
yet
thermal
management
remains
challenging
due
to
localized
overheating
and
non-uniform
temperature
distribution.
To
address
the
trade-off
between
pressure
drop
performance
in
marine
PEMFC
cooling
plates,
this
study
developed
systematically
evaluated
six
flow
channel
configurations
through
CFD
simulations.
Parametric
analysis
coupled
with
orthogonal
experimental
design
was
employed
explore
effects
of
secondary
number
(N),
angle
(α),
width
(d),
spacing
(L).
The
results
demonstrated
that
Type
B
(parallel
channels)
reduced
by
28.2%
while
achieving
highest
efficiency
coefficient
(2.66
×
104)
compared
conventional
configuration.
Range
further
ranked
parameter
sensitivity
identified
optimal
combinations
distinct
optimization
objectives:
(N
=
7,
α
30°,
d
0.5
mm,
L
2.5
mm),
8,
75°,
1.5
90°,
mm).
These
findings
provide
practical
guidelines
designing
plates
thermal-hydraulic
requirements
systems,
advancing
their
viability
propulsion
applications.
Applied Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
249, P. 123437 - 123437
Published: May 16, 2024
This
paper
comprehensively
investigates
the
purge
mechanism
of
proton
exchange
membrane
fuel
cells
during
shutdown
process,
which
qualitatively
examines
effect
parameters
(including
current
density,
stoichiometric
ratio,
and
relative
humidity)
on
water
content
variation,
further
quantitatively
remaining
post-purge.
In
contrast
to
previous
studies,
this
offers
a
novel
perspective
analyzing
process
conducts
thorough
examination
residual
content.
study
presents
transient,
isothermal,
two-phase
flow
model
for
cells,
is
subsequently
validated
experimentally.
Results
indicate
that
significance
follows
descending
order:
humidity,
density.
During
purge,
ratio
should
be
rapidly
increased
above
9.
Each
incremental
rise
in
from
6
14
leads
respective
reduction
after
2.19
%,
1.57
1.18
0.93
0.76
0.63
0.53
0.46
%.
Similarly,
it
recommended
swiftly
decrease
humidity
below
40
Elevating
density
20
200
mA/cm2
decreases
time
required
completely
remove
liquid
20.24
s
6.59
s.
Hence,
employing
higher
at
onset
facilitates
quicker
removal
water,
albeit
resulting
an
increase
post-purge,
3.17
3.70.
summary,
optimizing
strategy
requires
adjusting
densities
according
specific
stage.
