Heat Transfer Engineering,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 9
Published: Dec. 27, 2024
Two
methods
of
heat
transfer
enhancement
that
have
received
considerable
interest
in
recent
years
are
nanofluids
and
inserts.
Comparatively
few
studies
evaluated
the
performance
systems
with
inserts
used
combination.
In
this
study,
effects
alumina/water
(Al2O3/H2O),
copper
oxide/cetyltrimethyl
ammonium
bromide/water
(CuO/H2O/CTAB),
activated
carbon/arabinogalactan/water
(C/H2O/ARB)
both
without
hiTRAN®
were
investigated
using
double-pipe
exchangers
a
customized
experimental
rig.
The
increase
rates
due
to
nanoparticles
(1%
by
mass
nanofluids)
was
comparable
magnitude
observed
for
(i.e.
water
only),
however,
friction
factors
considerably
higher
than
nanofluids.
two
appeared
be
additive
when
conjunction
nanoparticles.
Of
three
C/H2O/CTAB
nanofluid
had
best
thermal
assessed
most
commonly
applied
index,
Due
agglomeration
nanoparticles,
particularly
Al2O3/H2O
did
not
surfactant,
much
less
practical
deal
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 4, 2025
This
study
investigates
the
enhancement
of
solar
cell
efficiency
using
nanofluid
cooling
systems,
focusing
on
citrate-stabilized
and
PVP-stabilized
silver
nanoparticles.
Traditional
silicon-based
perovskite
cells
were
examined
to
assess
impact
these
nanofluids
improvement
thermal
management.
A
Central
Composite
Design
(CCD)
was
employed
vary
nanoparticle
concentration
(0.2–0.8
wt%),
coolant
flow
rate
(0.5–1.5
L/min),
irradiance
(800–1000
W/m²).
Efficiency
improvements
measured
Ordinary
Least
Squares
(OLS)
regression.
The
experimental
setup
integrated
systems
with
cells,
facilitating
efficient
heat
dissipation.
Results
showed
significant
gains:
improved
from
15
17%
PVP
stabilization,
increased
18
21.1%.
exhibited
superior
conductivity
(0.7
W/m
K)
lower
resistance
(0.008
K/W)
compared
nanofluids,
leading
notable
reductions
in
operating
temperatures.
For
silicon
temperatures
dropped
50
°C
40
PVP,
for
55
°C.
Response
Surface
Methodology
(RSM)
identified
optimal
conditions
maximum
at
0.8
wt%
1.5
L/min
rate.
These
findings
underscore
potential
enhancing
performance
longevity.
Future
research
should
refine
design,
increase
sample
size,
explore
other
types
stabilization
methods
optimize
contributes
broader
goal
promoting
widespread
adoption
energy
as
a
sustainable
alternative
conventional
sources.
Heat Transfer,
Journal Year:
2024,
Volume and Issue:
53(8), P. 4364 - 4393
Published: Aug. 5, 2024
Abstract
Heat
exchangers
are
crucial
in
transferring
heat
and
finding
applications
across
various
industries.
Numerous
strategies
have
been
devised
to
improve
optimize
the
transfer
process
within
these
systems.
Among
these,
passive
methods
garnered
significant
attention
for
their
ability
operate
without
external
power
consumption.
This
article
examines
recent
experimental
computational
studies
conducted
by
researchers
since
2018
on
enhancement
techniques,
especially
twisted
tape,
wire
coil,
swirl
flow
generator,
others,
boost
thermal
efficiency
of
aid
designers
adopting
augmentation
compact
exchangers.
Recently,
researchers'
new
class
maldistribution
devices,
referred
as
has
gained
attention;
which
enhances
convective
introducing
into
main
disrupting
boundary
layer
at
tube
surface
through
alterations
geometry.
Twisted
tape
inserts
devices
that
demonstrate
better
performance
laminar
compared
turbulent
flow.
Conversely,
other
techniques
like
ribs,
conical
nozzles,
rings
generally
more
effective
than
A
research
trend
is
utilization
nanofluids
combination
with
turbulators,
exchangers,
can
reduce
exergy
losses
overall
coefficient
effectiveness
exchanger.
Research Society and Development,
Journal Year:
2024,
Volume and Issue:
13(5), P. e0513545674 - e0513545674
Published: May 3, 2024
Through
systematic
review
method
the
article
presents
potential
of
existing
solar
energy
in
Mozambique
for
use
water
heating
with
integration
thermal
storage
systems
that
are
currently
being
investigated.
It
emphasizes
need
affordable
materials
building
collectors
Mozambique’s
homes,
leveraging
country’s
to
reduce
electricity
consumption
and
environmental
impact
sustainable
development.
explores
current
research
on
reviews
alternative
based
their
properties,
cost,
availability.
The
importance
efficiency
load
balancing
is
highlighted.,
it
discusses
list
construction
flat
plate
from
roofing
material,
frame,
absorber,
pipes,
heat
material
according
thermophysical
costs,
availability
Mozambican
market
context
industrialization.
