Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Сен. 22, 2023
Abstract
The
current
work
looks
at
a
horizontally
oriented
double-pipe
thermal
energy
storage
system
with
PCM
filled
in
the
annular
gap
and
heat
transfer
fluid
(Water,
MXene,
Al
2
O
3
nanofluid)
flowing
an
inner
tube
from
physical
standpoint.
discharging
properties
of
latent
heat-based
various
intake
temperatures
(290K,
298K,
303K)
have
been
analyzed
while
maintaining
constant
mass
flow
rate
fluid.With
varying
input
temperatures,
numerical
investigation
influence
solidification
on
liquid
fraction
temperature
for
capric
acid
PCM-based
has
made.
Based
data,
TES
1%
v/v.
MXene
nanofluid
290K
inlet
solidify
faster
than
water
nanofluid.
In
system,
was
solidified
by
water,
as
HTF
30–120
minutes,
50–200
90–380
respectively,
290K,
303K.
At
temperature,
90%
303.37K,
42.37%
309.57K,
68.35%
306.27K.
during
90
42.37%,
after
30
60
minutes
290K.
Thus,
nanofluids
fluids
double
are
more
feasible
valuable
traditional
energy-efficient
sustainable
storage.
Energies,
Год журнала:
2024,
Номер
17(12), С. 2924 - 2924
Опубликована: Июнь 14, 2024
Using
the
mass
of
a
building
to
store
or
dissipate
heat
can
reduce
demand
on
auxiliary
heating
and/or
cooling
systems.
There
is
scarcity
full-scale
and
full-year
studies
in
literature,
which
this
study
seeks
address,
as
it
critical
assess
performance
real
phase
change
material
(PCM)
composites
throughout
all
seasons.
This
involved
design
manufacture
precast
cladding
sandwich
panels
with
PCM–concrete
inner
leaf
used
three
huts
were
instrumented
record
thermal
data
over
18
months.
Analysis
these
showed
that
when
internal
air
temperature
fluctuated
through
temperature,
composite
was
effective
at
reducing
temperatures
by
up
16%
if
overnight
ventilation
provided
12%
without
temperate
climate.
Furthermore,
PCM
located
deeper
than
60
mm
from
surface
wall
ineffective
temperatures.
The
also
highlighted
conditions
required
activate
only
occurred
during
30%
year.
validate
simulation
model
be
derive
bespoke
solutions
for
form
technology
scenarios
any
geographical
location.
ASME Journal of Heat and Mass Transfer,
Год журнала:
2024,
Номер
146(12)
Опубликована: Июль 20, 2024
Abstract
The
impacts
of
melting
behavior
on
the
thermal
performance
triple
tube
energy
storage
(TT-TES)
and
double
(DT-TES)
systems
employing
cetyl
alcohol
3%
v/v.
MXene
nano-enhanced
PCM
(NEPCM)
are
compared
numerically
evaluated
in
this
work.
For
both
DT-TES
TT-TES
systems,
following
were
investigated
connection
to
time:
system
efficiency,
discharged
energy,
heat
transfer
rate,
exergy
destruction,
entropy
generation
number,
exergetic
fraction,
temperature
contours.
In
addition,
effect
Stefan,
Rayleigh,
Nusselt
numbers
Fourier
for
with
NEPCM.
MXene-based
displayed
6.53%
more
Stefan
number
than
alcohol.
pure
phase
change
material
(PCM)
consumes
0.4%
at
7800
s
Pure
a
had
4.16%
higher
is
7.93%
lower
that
reduces
by
1.95%
over
has
76.99%
optimal
efficiency
5400
time
NEPCM
77.04%
4800
DT-TES.
charging
0.7%
Furthermore,
given
volume
PCM,
occurs
rapidly
system.
Currently,
the
leakage
problem
of
phase
change
materials
can
be
solved
by
microencapsulation
technology.
Inorganic
hydrated
salt
have
advantages
high
latent
heat
density,
thermal
conductivity
and
low
cost.
How
to
construct
inorganic
microcapsules
with
excellent
storage
capacity
photothermal
conversion
performance
maintains
a
challenge.
In
this
work,
MXene/Na2HPO4·12H2O@SiO2
(MXene/MPCMs)
composite
were
designed
prepared.
The
Na2HPO4·12H2O
was
directly
used
as
material
TEOS
raw
generate
SiO2
wall
material.
MXene
played
key
important
role
in
simultaneously
enhancing
their
efficiency
while
maintaining
available
heat.
prepared
emulsification
mechanism
(MPCM-1)
showed
more
obvious
release
characteristics,
reached
169.62
J/g.
With
increase
content,
maximum
surface
temperature
significantly
increased.
Based
on
results
distribution,
ability
transfer
rate
effectively
improved,
which
mainly
attributed
remarkable
light
absorption
MXene.
When
added,
MXene/MPCMs
still
properties
(~
156.64
J/g).
At
same
time,
good
chemical
compatibility,
crystallization
characteristics
stability.
Considering
enhancement,
show
application
prospect
solar
energy
utilization.
ABSTRACT
The
present
study
numerically
investigates
the
energy
and
exergy
analysis
of
solidification
phase
change
materials
within
a
double
tube
triple
latent
heat
storage
unit
using
ANSYS
Fluent.
Double
thermal
system's
characteristics
are
examined
MXene
nano‐enhanced
material
to
determine
system
efficiency,
discharged
energy,
transfer
rate,
destruction,
entropy
generation
number,
exergetic
liquid
fraction,
temperature
contours.
result
revealed
that
with
pure
cetyl
alcohol
PCM
has
14.76%
lower
discharge
than
MXene‐based
in
solidification.
In
system,
time
for
is
impressively
reduced
by
54.76%
compared
material.
At
Fourier
number
0.00672,
exhibits
an
11.69%
higher
Stefan
(St)
system.
2400
s,
generated
3.14%
4.88%
less
During
process
experiences
7.60%
destruction
at
s.
discharging
2.92%
more
efficiently
over
solidified
20.83%
faster
due
nanoparticles'
better
thermophysical
properties.
Thus,
solidifies
per
volume
