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
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(2), P. 693 - 693
Published: Jan. 12, 2024
This
study
proposed
a
model
of
porous
media-assisted
flat-plate
solar
collector
(FPSC)
using
nanofluid
flow.
The
heightened
thermal
efficiency
FPSC
undergoes
numerical
scrutiny,
incorporating
various
factors
for
analysis,
including
aspects
like
the
configuration
block
introduced,
Darcy
number
(Da
=
10−5~10−2),
types
nanoparticles,
volume
fraction
(φ),
and
mixing
ratio
(φc).
findings
indicate
that
dominant
factor
in
channel
is
global
Nusselt
(Nug).
As
rises,
there
an
improvement
heat
transfer
performance
within
channel.
Simultaneously,
case
Re
234,
φ
3%,
φc
100%,
Nug
reaches
maximum
value
6.80,
can
be
increased
to
70.5%
with
insertion
rectangular
blocks
Da
10−2.
Finally,
evaluation
criteria
(PEC)
are
employed
comprehensive
assessment
FPSC.
analysis
considers
both
improved
pressure
drop
registered
PEC
1.8
when
were
inserted
under
conditions
10−2
234
concentrations
3%
100%.
provided
technically
support
future
commercial
applications
may
serve
as
technical
foundation
upcoming
media
applications.
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
With
the
rapid
advancement
of
technology,
global
demand
for
energy
is
increasing
exponentially.
It
crucial
to
focus
on
conservation
and
conversion
across
all
sectors.
This
study
conducted
a
second
law
or
exergy
analysis
solar
water
heating
system
uncover
hidden
losses
during
process.
To
optimize
exergetic
efficiency,
genetic
algorithm
was
employed
control
overall
loss
coefficient
flat
plate
collector.
Four
decision
variables
were
used
in
algorithm—heat
flux
rate,
glass
cover
temperatures
at
inlet
exit,
collector
temperature
minimize
coefficient.
Energy
entropy
generation,
destruction
estimated
various
mass
flow
rates
using
thermodynamic
equilibrium
equations.
Exergy
correlations
developed
concerning
rate
(0.001–0.009
kg/s),
(300
K–360
K),
area
(1–10
m²),
incident
(400–900
W/m²),
optical
efficiency
(0.4%–1%),
ambient
(300–315
K)
under
range
initial
conditions.
found
that
slightly
increased
(0.01%–0.08%)
over
12-h
period.
Although
this
increase
small,
it
can
significantly
contribute
long
term.
The
predicted
minimum
occurring
peak
hours
(12–14
p.m.)
with
respect
four
variables.
results
compared
existing
literature
showed
good
agreement.
In
addition
analysis,
an
uncertainty
error
performed
assess
reliability
accuracy
experimental
measurements
computational
predictions.
By
quantifying
these
uncertainties,
ensured
reported
enhancements
optimization
obtained
through
are
robust
credible.
rigorous
adds
confidence
findings,
highlighting
potential
improved
systems.
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
