Journal of Science and Technology,
Год журнала:
2023,
Номер
8(11), С. 37 - 60
Опубликована: Янв. 11, 2023
This
paper
presents
a
numerical
investigation
of
proposed
heat
sink
equipped
with
enhanced
metal
foam
subjected
to
forced
convection.The
two-phase
Eulerian
model
is
employed
predict
the
behavior
Fe3O4-H2O
nanofluid,
analyze
transfer
properties
and
entropy
production.The
simulation
results
are
validated
against
existing
data,
good
agreement
achieved.The
impact
pore
permeability,
nanoparticle
size,
concentration,
flow
velocity
on
exchange
studied.Our
show
that
application
reinforced
enhances
average
Nusselt
by
5.79%
compared
aluminum
foam,
can
reduce
thermal
47.58%
81.18%
for
Re
values
2600
3800,
respectively.Moreover,
PEC
increases
56%
when
permeability
raised.
Journal of Energy Storage,
Год журнала:
2024,
Номер
85, С. 111096 - 111096
Опубликована: Март 6, 2024
A
vertical
cylindrical
shell
and
tube
Latent
Heat
Thermal
Energy
Storage
(LHTES)
system
with
internal
corrugated
is
numerically
analyzed.
The
phase
change
material
(PCM)
partially
filled
aluminum
foam.
surface
assumed
at
assigned
temperature
higher
than
the
melting
of
considered
PCM.
losses
toward
external
ambient
are
also
considered.
governing
equations
written
considering
Brinkman-Darcy-Forchheimer
model
local
thermal
equilibrium
assumption.
numerical
developed
using
finite
volume
technique
employing
enthalpy-porosity
method
to
solve
problem.
solutions
carried
out
by
means
commercial
code
Ansys-Fluent.
Numerical
simulations
conducted
for
different
metal
foam
filling
levels,
various
porosity
values
corrugations,
both
without
losses.
Melting
time,
stored
enthalpy,
derived
from
provided.
findings
highlight
that
time
decreases
more
significantly
ratio
respect
due
increase
in
wave
number
decrease
amplitude.
heat
determines
an
time.
For
cases
losses,
enthalpy
lowest
energy
storage
totally
highest
number.
However,
these
present
Energy Sources Part A Recovery Utilization and Environmental Effects,
Год журнала:
2024,
Номер
46(1), С. 2360 - 2376
Опубликована: Янв. 23, 2024
The
low
ability
of
phase
change
material
(PCM)
to
transfer
thermal
energy
has
created
a
serious
challenge
for
the
development
latent
heat
storage
(LHTES)
units.
Embedding
foam
with
high
conductivity
like
copper
attracted
significant
attention.
Besides,
porosity,
lightweight,
and
easy
usage
are
other
important
benefits
copper.
However,
its
higher
cost
decreasing
effective
volume
PCM
led
creation
amendments
in
design.
Employment
form
fin
or
emerged
as
an
alternative
method
benefit
from
advantages
porous
overcome
defects.
In
this
study,
various
LHTES
units
different
numbers
fins
have
been
simulated
numerically
compared
pure
fully
enclosures.
Two
practical
boundary
conditions
including
constant
temperature
flux
were
examined
designed
systems.
obtained
results
demonstrated
that
remarkable
effect
on
performance
enhancement
under
condition.
For
six
fins,
42%
30%
reductions
melting
time
achieved
both
types
flux,
respectively.
At
beginning
charging
process,
input
rate
was
proved
6
up
112%
155%,
addition,
provided
some
free
permit
falling
out
natural
convection
molten
PCM.
Heliyon,
Год журнала:
2024,
Номер
10(12), С. e32307 - e32307
Опубликована: Июнь 1, 2024
The
objective
of
this
paper
is
to
present
new
heat
transfer
enhancement
approaches
in
plate-fin
sinks
(PFHS)
using
copper
foam
and
twisted
tapes.
motivation
behind
these
concepts
reduce
pressure
drop
while
enhancing
compared
PFHSs
fully
inserted
with
foam.
impact
tape
type,
twist
ratio,
Reynolds
number
on
the
flow
behaviors
inside
PFHS
equipped
(PFHSCF)
investigated.
Copper
has
a
porosity
0.932
pore
density
40
pores
per
inch.
Stationary
rotating
tapes
ratios
between
2.7
4
are
tested
at
numbers
3000
6000.
experimental
results
indicated
that
airflow
stationary
(PFHSCF_STT)
as
well
(PFHSCF_RTT)
decreased
by
an
average
34.8%
37.9%,
respectively,
PFHSCF.
When
ratio
from
2.7,
thermal
resistances
PFHSCF_STT
PFHSCF_RTT
reduced
14.2
14.8%,
respectively.
Based
assessment,
thermal-hydraulic
performance
3.3
higher
than
To
facilitate
practical
applications,
correlations
proposed
predict
Nusselt
friction
factor.
Additionally,
considering
outcomes
current
study,
conducting
numerical
investigations
under
different
densities
wider
recommended
determine
optimal
working
conditions
for
future
research.
