Heat Transfer,
Год журнала:
2024,
Номер
54(1), С. 994 - 1013
Опубликована: Окт. 9, 2024
Abstract
The
solar
updraft
tower
power
plant
presents
a
promising
renewable
energy
solution
but
faces
limitations
in
thermal
efficiency
and
production
during
nonsunny
hours.
This
study
addresses
critical
gap
the
literature
by
investigating
integration
of
latent
heat
storage
systems
utilizing
paraffin
wax
as
phase
change
materials
(PCMs)
to
enhance
(SUT)
performance.
Two
identical
small‐scale
SUTs
were
constructed,
both
using
same
tank
configuration;
however,
PCM
device
was
filled
with
PCM,
while
non‐PCM
contained
only
atmospheric
air.
Three
scenarios
explored,
featuring
varying
heights
2,
4,
6
cm
(the
full
capacity
tank).
Results
indicated
that,
from
3
p.m.
until
sunset,
PCM‐integrated
SUT
Case
(with
PCM)
achieved
best
performance,
an
average
absorber
temperature
rise
25°C,
compared
12°C
for
device.
During
period,
air
velocity
at
neck,
where
wind
turbine
could
be
installed,
1.21
m/s
device,
versus
0.82
Notably,
nocturnal
operating
time
extended
significantly
use,
rising
90
min
2
case
125
case.
In
contrast,
exhibited
no
operational
after
sunset.
research
not
demonstrates
effectiveness
improving
performance
longevity
also
introduces
novel
configuration
that
allows
flexible
integration,
representing
significant
advancement
development
more
efficient
systems.
Brazilian Journal of Biology,
Год журнала:
2023,
Номер
84
Опубликована: Фев. 1, 2023
Infectious
diseases
are
the
leading
cause
of
death
worldwide.
Thus,
nanotechnology
provides
an
excellent
opportunity
to
treat
drug-resistant
microbial
infections.
Numerous
antibiotics
have
been
used
inhibit
growth
and
kill
microbes,
but
development
resistance
emergence
side
effects
severely
limited
use
these
agents.
Due
nanotechnology,
nanoparticles
widely
as
antimicrobials.
Silver
chitosan
antifungal,
antiviral
antibacterial
properties,
many
studies
confirm
antifungal
properties
silver
nanoparticles.
Nowadays,
in
diagnosis
treatment
infectious
has
developed
due
less
also
help
particles
effective
drug
delivery
target
tissue.
Liposomes
carriers
delivery,
genes,
modeling
cell
membranes
both
animals
humans.
The
ability
liposomes
encapsulate
large
amounts
drugs,
minimize
unwanted
effects,
high
effectiveness
low
toxicity
attracted
interest
researchers.
This
review
article
examines
recent
efforts
by
researchers
identify
using
antimicrobial
nano-carriers.
Brazilian Journal of Biology,
Год журнала:
2023,
Номер
84
Опубликована: Май 15, 2023
Metals,
such
as
copper
and
silver,
can
be
extremely
toxic
to
bacteria
at
exceptionally
low
concentrations.
Because
of
this
biocidal
activity,
metals
have
been
widely
used
antimicrobial
agents
in
a
multitude
applications
related
with
agriculture,
healthcare,
the
industry
general.
A
large
number
microorganisms
live
human
environment.
if
balance
these
creatures
nature
is
disturbed,
health
individual
society
will
threatened
due
production
emission
unpleasant
odors
reduction
standards.
The
presence
on
textiles
cause
adverse
effects
discoloration
or
staining
textiles,
decomposition
fibrous
materials,
reduced
strength,
eventually
decay
textiles.
Most
fibers
polymers
do
not
show
resistance
microbes
by
providing
growth
factors
for
right
temperature
humidity,
nutrients
from
sweat
fat
skin
glands,
dead
cells
well
materials
stage
finishing
causes
rapid
spread
various
microbes.
With
advent
nanotechnology,
industries
daily
life
underwent
changes.
In
recent
years,
increasing
research
nanoparticles
has
led
greater
efficiency
added
value.
These
modified
prevent
odors,
spread,
transmission
diseases.
This
article
reviews
basics
principles
tetiles,
brief
overview
nanostructures
properties.
International Journal of Heat and Mass Transfer,
Год журнала:
2023,
Номер
215, С. 124384 - 124384
Опубликована: Июль 11, 2023
In
this
paper,
the
heat
storage
process
of
a
latent
thermal
energy
(LHTES)
tank
is
studied
numerically.
A
new
type
gradient
fin
added
to
in
improve
transfer
performance
internal
phase
change
material
(PCM).
The
numerical
model
verified
by
experimental
data.
influences
different
structures
on
melting
rate,
temperature
distribution,
velocity
and
maximum
rate
PCM
LHTES
are
investigated,
influence
natural
convection
system
further
quantified.
results
show
that
time
can
be
significantly
reduced
16.9%
using
four
straight
fins
with
shape,
41.1%
reconstruction
position.
deformation
opposite
direction
will
slow
down
speed
extend
more
than
4.66
times.
criterion
for
judging
buoyancy
melt
paper
shows
dominant
both
upper
lower
part
melt.
closer
coefficient
overall
coefficient,
better
efficiency
be.
e-Prime - Advances in Electrical Engineering Electronics and Energy,
Год журнала:
2024,
Номер
8, С. 100510 - 100510
Опубликована: Март 13, 2024
Sustainability
and
lack
of
resources
both
outline
need
for
energy
storage
tactics,
materials,
devices.
In
fact,
is
nowadays
the
most
important,
at
same
time
challenging
feature
in
under
development
developing
countries.
Renewable
energies
are
focused
as
minimizing
consumption,
whereas
maximizing
energies.
Geopolitical
features
together
with
wars
middle-east
Europe
borderline
criticize
such
important
topic
more
more.
Rechargeable
batteries
have
widely
been
served
developed
continuously
electronic
devices
a
means
storing
electrical
energy.
Therefore,
increasing
capacity
life
has
become
target
researchers
working
this
field.
Enlargement
application
performance
windows
possible
by
era
nanotechnology,
that
new
generations
rechargeable
enjoy
from
much
higher
efficiency
respect
to
first-generation
ones.
article,
after
examining
electrochemical
preparations,
their
types
discussed.
Alkaline
lead-acid
also
discussed
on
basis
nanotechnology.
Results in Engineering,
Год журнала:
2023,
Номер
20, С. 101514 - 101514
Опубликована: Окт. 23, 2023
In
this
study,
a
novel
design
for
serpentine
tube
is
proposed
to
develop
an
efficient
photovoltaic-thermal
(PV/T)
system.
For
purpose,
three
different
hybrid
nanofluids
and
two
types
of
PCM
were
numerically
investigated
in
with
cross-sectional
shapes
(rectangular,
circular,
triangular).
The
electrical,
thermal,
exergy
efficiencies
the
PV/T
system
are
evaluated
ascertain
feasibility
configuration
working
fluid.
results
showed
that
using
composite
rectangular
cross-section
increased
thermal
electrical
efficiency
by
31.1
%
5.4
%,
respectively,
compared
state
without
circular
cross-section.For
more
comprehensive
assessment,
effect
volume
concentration
1.5
studied
determine
which
nanofluid
has
better
on
improving
heat
transfer.
Fe3O4-MWCNT
demonstrates
most
effective
cooling
down
PV
cell
temperature.
It
used
up
4.5
investigate
how
increasing
can
affect
important
parameters
such
as
temperature,
fluid
outlet
efficiency.Moreover,
(4.5
%)
along
increases
13.3
16.2
%.
Journal of Energy Storage,
Год журнала:
2023,
Номер
69, С. 107876 - 107876
Опубликована: Июнь 9, 2023
The
enthalpy-porosity
method
is
generally
applied
as
an
economical
resort
for
the
numerical
simulation
of
phase
change
materials
(PCMs).
However,
having
been
developed
strictly
metals,
its
suitability
task
unclear,
nor
rationale
assigning
internal
parameters,
e.g.,
latent
enthalpy
and
constant
momentum
source
term
representing
"mushy"
region.
We
first
experimentally
exhaustively
characterize
a
paraffin-type
PCM,
including
differential
scanning
calorimetry
(DSC)
at
several
heating
rates,
T-history,
fusion
visualization.
Then,
we
develop
model
systematically
run
simulations
under
different
parameters
thermophysical
properties
PCM.
Simulation
results
exhibit
significant
disagreement
with
experiments
that
cannot
be
reduced
by
any
strategy
combining
material
parameters.
Among
other
effects,
term,
which
has
to
assigned
somewhat
arbitrarily,
more
relevance
in
accuracy
than
set
obtained
DSC
experimental
techniques.
Thus,
rather
negative,
although
interesting,
conclusion
suggested:
may
fail
PCMs.
This
is,
course,
paramount
importance
studies
their
utilization
practical
systems
since
it
puts
fundamental
point
uncertainty
study
or
lumped-type
derived
thereof.
paper
concludes
tentative
discussion
possible
causes
this
failure
perspectives
developing
proper
models.
