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.
Numerical Heat Transfer Part A Applications,
Год журнала:
2024,
Номер
unknown, С. 1 - 28
Опубликована: Март 28, 2024
This
comprehensive
study
systematically
investigates
the
melting
and
solidification
processes
in
phase
change
material
(PCM)
units,
specifically
comparing
different
inner
tube
geometries,
including
horizontal
oval,
inclined
oval
(45°),
vertical
against
circular
tube.
Through
meticulous
analysis,
reveals
that
demonstrates
superior
efficiency,
achieving
complete
significantly
shorter
times
compared
to
other
geometries.
In
process,
unit
with
a
completes
at
7560
s,
units
7500
7260
s.
Notably,
reduction
time
for
is
approximately
0.8%,
while
unit,
it
notably
greater
3.96%.
Similarly,
17760
s;
17160
16080
whereas
14400
The
3.37%
9.46%,
respectively,
18.91%.
These
findings
underscore
profound
influence
of
design
on
heat
absorption,
temperature
profiles,
overall
PCM
performance.
substantial
reductions
both
times,
particularly
tube,
highlight
critical
role
geometry
optimizing
efficiency
responsiveness
thermal
changes.
Energy,
Год журнала:
2024,
Номер
304, С. 132101 - 132101
Опубликована: Июнь 22, 2024
The
development
of
Energy
Storage
technologies
is
critical
to
achieving
a
cleaner
energy
future.
As
one
the
most
widely
used
storage
technologies,
Latent
Thermal
(LTES)
still
suffers
from
poor
charging
and
discharging
performance
subjected
low
thermal
conductivity
Phase
Change
Materials
(PCMs)
inefficient
heat
transfer
process.
Heat
enhancement
techniques,
such
as
using
fins
adding
highly
conductive
materials,
have
been
developed
optimized
overcome
these
challenges.
Recently,
additional
novel
methods
integrating
adjustable
external
fields
gravity,
magnetic
field,
electric
field
proposed
enhance
LTES,
due
their
advantages
including
easy
adjustment
parameters
according
evolution
Firstly,
this
work
briefly
summarizes
progress
conventional
methods.
Secondly,
advancement
by
effects
has
analyzed
discussed.
Finally,
potential
improve
LTES
under
fluctuating
sources
discussed
considering
wide
existence
supply
load
in
real
applications.
main
contributions
review
are:
(a)
emerging
for
are
comprehensively
summarised
first
time;
(b)
different
techniques
demonstrated
when
applications
LTES.
