Processes,
Год журнала:
2024,
Номер
12(12), С. 2711 - 2711
Опубликована: Дек. 1, 2024
Hydrogen,
as
one
of
the
most
promising
renewable
clean
energy
sources,
holds
significant
strategic
importance
and
vast
application
potential.
However,
a
high-energy
combustible
gas,
hydrogen
poses
risks
fire
explosion
in
event
leakage.
Hydrogen
production
plants
typically
feature
large
spatial
volumes
complex
obstacles,
which
can
significantly
influence
diffusion
pathways
localized
accumulation
during
short-term,
high-volume
release,
further
increasing
risk
accidents.
Implementing
effective
leakage
monitoring
measures
mitigate
these
risks,
ensuring
safety
personnel
environment
to
greatest
extent
possible.
Therefore,
this
paper
uses
CFD
methods
simulate
process
plant.
The
study
examines
molar
fraction
distribution
characteristics
presence
obstacles
by
varying
ventilation
speed
plant
directions
main
conclusions
are
follows:
enhancing
effectively
prevent
rapid
increase
concentration,
with
higher
speeds
yielding
better
suppression.
After
leak
confined
space,
tends
diffuse
along
walls
accumulate
corner
areas,
indicating
that
equipment
should
be
placed
locations.
Physics of Fluids,
Год журнала:
2024,
Номер
36(12)
Опубликована: Дек. 1, 2024
The
trends
and
future
directions
of
hydrogen
safety
research
cannot
be
separated
from
the
thermodynamic
behavior
combustion
explosion,
spontaneous
combustion,
flame
propagation
behavior,
mechanisms,
other
related
topics.
In
this
paper,
through
method
numerical
simulation,
considering
detonation
characteristics
in
annular
section
chamber
commonly
used
gas
turbines,
form
impact
channel
are
evaluated.
By
discussing
deflagration
to
transition
hydrogen/air
premixed
under
different
working
conditions,
it
is
found
that
propagates
close
inner
wall
forms
a
strong
expansion
turbulence
between
outer
flame.
surface
airflow
shear
accelerate
hydrogen.
area
on
side
tip
prone
set
off
detonation.
high-pressure
after
mainly
acts
symmetrical
end
face
ignition
area.
There
critical
temperature
make
strength
strongest
when
occurs.
Reducing
equivalence
ratio
filling
can
significantly
reduce
reaction
speed
weaken
wall.
When
less
than
certain
value,
completely
consumed
deflagration.
Hydrogen,
as
a
renewable
and
clean
energy
carrier,
has
the
potential
to
play
an
important
role
in
carbon
reduction.
Crucial
achieving
this
is
ability
produce
sources
of
hydrogen
store
safely.
With
rapid
development
industry,
number
refueling
stations
(HRS)
increasing.
However,
safety
at
HRS
great
concern
due
high
risk
leakage
during
storage.
This
study
focused
on
integrated
production
station
(IHPRS)
Weifang,
China,
numerically
simulated
accident
its
storage
area.
The
effects
aperture,
direction
ambient
wind
speed
dissipation
characteristics
were
investigated.
results
showed
that
volume,
mass
time
flammable
cloud
(FHC)
increased
with
increase
aperture.
installation
canopy
or
densely
packed
equipment
near
area
will
seriously
hinder
FHC.
Ambient
winds
opposite
may
cause
high-concentration
accumulate
tanks
be
difficult
dissipate,
threatening
station.
Frontiers in Energy Research,
Год журнала:
2024,
Номер
12
Опубликована: Окт. 16, 2024
With
the
advancement
of
Fuel
Cell
Vehicles
(FCVs),
detecting
hydrogen
leaks
is
critically
important
in
facilities
such
as
refilling
stations.
Despite
its
significance,
dynamic
response
performance
sensors
confined
spaces,
particularly
under
ceilings,
has
not
been
comprehensively
assessed.
This
study
utilizes
a
catalytic
combustion
sensor
to
monitor
area.
It
examines
effects
leak
size
and
placement
height
on
distribution
concentrations
beneath
ceiling.
Results
indicate
that
concentration
rapidly
decreases
within
0.5–1.0
m
range
below
ceiling
declines
more
gradually
from
1.0
2.0
m.
The
further
explores
attenuation
pattern
radially
jet
By
normalizing
radius
concentration,
it
was
determined
conforms
Gaussian
model,
akin
observed
open
space
flows.
Utilizing
this
assumption,
model
refined
by
incorporating
an
impact
reflux
term,
thereby
enhancing
accuracy
predictive
formula.
Processes,
Год журнала:
2024,
Номер
12(11), С. 2459 - 2459
Опубликована: Ноя. 6, 2024
Accidental
leakage
from
oil–gas
storage
tanks
can
lead
to
the
formation
of
liquid
pools.
These
pools
result
in
vapor
cloud
explosions
(VCEs)
if
combustible
vapors
encounter
ignition
energy.
Conducting
accurate
and
comprehensive
consequence
analyses
such
is
crucial
for
quantitative
risk
assessments
(QRAs)
industrial
safety.
In
this
study,
a
methodology
based
on
SLAB-TNO
model
calculate
overpressure
resulting
VCE
presented.
Based
method,
consequences
accident
considering
gas
concentration
diffusion
are
studied.
The
probit
employed
evaluate
casualty
probabilities
under
varying
environmental
operational
conditions.
effects
key
parameters,
including
time,
wind
speed,
lower
flammability
limit
(LFL),
environment
temperature,
systematically
investigated.
results
indicate
that
when
time
less
than
100
s,
significantly
more
severe
due
rapid
spread
cloud.
Furthermore,
increasing
speed
accelerates
dispersion,
reducing
spatial
extent
isopleths.
LFL
shown
have
direct
impact
both
mass
flammable
cloud,
with
higher
values
shifting
explosion’s
epicenter
upward.
temperature
promotes
core
area
increases
findings
provide
critical
insights
improving
safety
protocols
oil
facilities
serve
as
valuable
reference
assessment
emergency
response
planning
similar
scenarios.
Processes,
Год журнала:
2024,
Номер
12(12), С. 2711 - 2711
Опубликована: Дек. 1, 2024
Hydrogen,
as
one
of
the
most
promising
renewable
clean
energy
sources,
holds
significant
strategic
importance
and
vast
application
potential.
However,
a
high-energy
combustible
gas,
hydrogen
poses
risks
fire
explosion
in
event
leakage.
Hydrogen
production
plants
typically
feature
large
spatial
volumes
complex
obstacles,
which
can
significantly
influence
diffusion
pathways
localized
accumulation
during
short-term,
high-volume
release,
further
increasing
risk
accidents.
Implementing
effective
leakage
monitoring
measures
mitigate
these
risks,
ensuring
safety
personnel
environment
to
greatest
extent
possible.
Therefore,
this
paper
uses
CFD
methods
simulate
process
plant.
The
study
examines
molar
fraction
distribution
characteristics
presence
obstacles
by
varying
ventilation
speed
plant
directions
main
conclusions
are
follows:
enhancing
effectively
prevent
rapid
increase
concentration,
with
higher
speeds
yielding
better
suppression.
After
leak
confined
space,
tends
diffuse
along
walls
accumulate
corner
areas,
indicating
that
equipment
should
be
placed
locations.
