Energies,
Год журнала:
2023,
Номер
16(19), С. 6915 - 6915
Опубликована: Сен. 30, 2023
Solar
energy
is
a
sustainable
source
that
can
be
effectively
utilized
to
address
winter
heating
challenges
in
buildings.
To
ensure
the
efficient
application
of
solar
for
purposes
and
maintain
reliable
performance
system,
integration
phase-change
materials
(PCMs)
thermal
storage
(TES)
systems
has
emerged
as
crucial
auxiliary
approach.
This
study
focuses
on
design
simulation
four
TES
structures:
smooth,
finned,
metallic
foam,
foam-finned
tubes.
It
explores
their
characteristics,
such
complete
melting
time
heat
flux,
under
various
flow
conditions.
Additionally,
residential
building
Xi’an
selected
object,
where
proposed
system
employed
meet
demand.
Economic
indicators,
including
initial
investment
payback
period,
are
estimated
using
static
evaluation
method.
The
results
highlight
unit
with
tube
4800
s,
which
88.3%
less
than
smooth
tube.
Finally,
based
actual
project,
it
determined
an
HTF
rate
0.25
m/s,
requires
fewest
devices
(914)
period
13
months.
e-Prime - Advances in Electrical Engineering Electronics and Energy,
Год журнала:
2023,
Номер
6, С. 100306 - 100306
Опубликована: Окт. 6, 2023
In
this
study,
an
investigation
was
conducted
on
four
distinct
configurations,
designated
as
Case-1,
Case-2,
Case-3,
and
Case-4,
focusing
parametric
analysis.
Each
configuration
features
a
cylindrical
enclosure
containing
pure
Gallium,
phase
change
material
(PCM).
The
solid-to-liquid
transition
of
the
encapsulated
examined
using
2D
CFD
methodology.
Additionally,
effect
applying
three
temperatures,
T1=32∘C,
T2=39∘C,
T3=42∘C,
along
generator
enclosure,
with
or
without
fins,
also
studied.
To
accurately
model
melting
process
PCM,
Enthalpy-
Porosity
Method
employed,
meticulous
detailing
underlying
assumptions
under-
taken
to
ensure
precise
representation.
validation
involved
comparing
outcomes
physical
solidification/melting
reference
data
from
state-of-the-art
study.
specific
cases
comprised
Case-1
-
slender
finless
cylinder;
Case-2
thin
finned
cylinder
(l=10mm,
t=0.6mm);
Case-3
featuring
larger
fins
(l=20mm,
Case-4
incorporating
largest
(l=30mm,
t=0.6mm).
Strategically
accelerates
Gallium
significantly,
reducing
times
by
up
89%.
This
enhancement
is
driven
96%
increase
in
heat
transfer
coefficient
(h),
leading
faster
rates.
addition,
boost
Nusselt
number
(Nu)
91%,
indicating
improved
convective
enhanced
melting.
Melting
rates
around
30%,
notably
Case-3.
Temperature
T1
shifts
dominant
convection
conduction,
seen
contours
stratified
patterns
at
t=240s
t=300s.
A
localized
cold
spot
t
=
300s
signals
effects.
Energies,
Год журнала:
2023,
Номер
16(19), С. 6915 - 6915
Опубликована: Сен. 30, 2023
Solar
energy
is
a
sustainable
source
that
can
be
effectively
utilized
to
address
winter
heating
challenges
in
buildings.
To
ensure
the
efficient
application
of
solar
for
purposes
and
maintain
reliable
performance
system,
integration
phase-change
materials
(PCMs)
thermal
storage
(TES)
systems
has
emerged
as
crucial
auxiliary
approach.
This
study
focuses
on
design
simulation
four
TES
structures:
smooth,
finned,
metallic
foam,
foam-finned
tubes.
It
explores
their
characteristics,
such
complete
melting
time
heat
flux,
under
various
flow
conditions.
Additionally,
residential
building
Xi’an
selected
object,
where
proposed
system
employed
meet
demand.
Economic
indicators,
including
initial
investment
payback
period,
are
estimated
using
static
evaluation
method.
The
results
highlight
unit
with
tube
4800
s,
which
88.3%
less
than
smooth
tube.
Finally,
based
actual
project,
it
determined
an
HTF
rate
0.25
m/s,
requires
fewest
devices
(914)
period
13
months.
