Energies,
Год журнала:
2024,
Номер
17(18), С. 4561 - 4561
Опубликована: Сен. 12, 2024
As
an
efficient
heating
terminal,
direct-condensation
terminals
are
increasingly
being
applied.
This
study
proposes
novel
panels
with
different
aspect
ratios,
which
have
been
optimized
in
structure
and
reduced
copper
tube
length.
To
quantify
their
thermal
superiority,
the
proposed
panels’
economic
performance
system
efficiencies
investigated.
Compared
previous
terminals,
vertical
temperature
difference
provided
by
is
1.1
±
0.2
°C,
improving
comfort.
Meanwhile,
COP
competitive
among
existing
terminals.
The
average
capacity
per
cost
of
reaches
5.4
W/USD,
24.1%~46.3%
higher
than
that
panels.
In
addition,
impact
ratio
shows
panel
a
high
has
advantages
efficiencies.
annual
running
task
efficiency
2.22
74.81
USD
48.5%,
respectively,
4.7%
lower
0.9%
0.45,
respectively.
developed
help
to
optimize
technology
air
source
heat
pumps,
while
evaluation
methodology
results
suitable
for
optimizing
other
Journal of Computational Design and Engineering,
Год журнала:
2024,
Номер
11(2), С. 22 - 36
Опубликована: Янв. 29, 2024
Abstract
The
study
of
variety
Newtonian
nanofluids
subject
to
various
physical
model
parameters
gained
much
interest
engineers
and
scientists.
Owing
their
coolant
absorption
characteristics,
these
are
broadly
found
in
chemical
engineering,
biomedical
engineering
(expansion
contraction
veins
arteries),
detection
cancer
cells
through
magnetic
nanoparticles,
microchips,
particularly
petroleum
industry.
This
focuses
on
investigation
nanofluid
heat
transfer
applications
inside
a
channel
formed
by
expanding/contracting
walls.
A
new
transport
is
introduced
adding
the
effects
nanoparticles
molecular
diameters,
thermal
radiations,
walls
permeability.
Then,
numerical
code
for
developed
executed
analyze
dynamics
from
aspects.
For
expanding
(${\alpha
}_1
=
1.0,2.0,3.0,4.0$)
contracting
-
1.0,
2.0,
3.0,
4.0$)
walls,
velocity
examined
maximum
center.
However,
fluid
movement
working
domain
reverse
proportion
${Re}
1.0,3.0,5.0,7.0$.
Further,
high
absorbent
(${A}_1
0.1,0.3,0.5,0.7$)
controlled
motion
both
${\alpha
>
0$
<
0$,
respectively.
addition
radiation
number
${Rd}
0.1,0.3,0.5,0.7$
played
role
catalytic
parameter
which
imperatively
increased
temperature.
temperature
ratio
${\theta
}_r
reduced
this
decrease
rapid
conventional
fluid.
Numerical Heat Transfer Part A Applications,
Год журнала:
2024,
Номер
unknown, С. 1 - 15
Опубликована: Апрель 22, 2024
Soret
and
Dufour
effects
are
utilized
in
designing
efficient
heat
exchangers,
optimizing
separation
processes,
understanding
biological
transport
phenomena.
A
wedge-shaped
structures
aid
aerodynamics,
optics,
seismic
resistance,
studies.
Due
to
these
application
the
consequences
on
flow
of
nanofluid
due
wedge
have
been
investigated.
The
characteristics
water
(H2O)
as
a
base
fluid
single-walled
carbon
nanotubes
(SWCNTs),
multi-walled
(MWCNTs),
copper
(Cu)
nanoparticles
taking
into
account.
influence
thermal
radiation
source/sink
part
this
investigation.
Similarity
variables
used
sort
out
complexity
fundamental
governing
equations.
Maple
via
Runge–Kutta–Fehlberg
method
(RKF45)
is
solve
resulting
system
ordinary
differential
equations
(ODEs).
graphical
tabulated
results
velocity,
temperature,
concentration
profiles
plotted
against
different
parameters
involved
study.
findings
indicate
that
modifying
moving
factor
reduces
temperature
distribution.
By
increasing
value
magnetic
constraint
velocity
distribution
increased,
both
increased
for
varying
Dufour,
parameters.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
57, С. 104341 - 104341
Опубликована: Апрель 3, 2024
This
article
evaluates
the
utilization
of
Polyethylene
terephthalate
(PET)
and
Polydimethylsiloxane
(PDMS)
polymeric
coatings
for
passive
radiative
cooling
commercial
photovoltaic
(PV)
modules.
The
methodology
involves
design
film
analysis
their
optical
properties.
A
numerical
model
is
developed
to
simulate
thermal
behavior
PV
system.
Parametric
explores
influence
atmospheric
parameters,
such
as
wind
speed,
solar
radiation,
and,
relative
humidity
on
panels.
Adoption
PDMS
PET
with
200
μm
thickness
increases
transmissivity
glass
in
band
gap,
maintains
relatively
higher
emissivity
first
second
windows
bands,
improves
At
low
values
shown
be
capable
maintaining
cell
temperature
at
lower
than
ambient
temperature.
case
study
conducted
nocturnal
daytime
modules
shows
potential
integrated
into
under
specific
hot
humid
weather
conditions
Jeddah,
KSA.
Temperature
reductions
panel
by
about
10
°C
below
can
accomplished
summer
nights
using
cooling.
slightly
up
1.15
1.35
PDMS.
ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik,
Год журнала:
2024,
Номер
104(6)
Опубликована: Март 23, 2024
Abstract
The
nanofluids
became
much
of
interest
due
to
their
superior
heat
mechanism
over
the
conventional
fluids.
addition
nanoparticles
in
host
solvent
enhances
internal
ability
liquid
store
and
transmit
heat.
Therefore,
these
fluids
are
widely
used
biomedical
engineering,
detergents,
medication,
applied
thermal
mechanical,
chemical
engineering
so
forth.
Keeping
mind
significance
nanofluids,
this
study
is
conducted
investigate
comparative
transmission
under
Effective
Prandtl
Number
Model
(EPNM)
effects
a
vertical
permeable
cylinder.
Formulation
model
carried
out
cylinder
about
stagnation
point
transport
achieved
after
successful
implementation
cylindrical
stream
function,
effective
characteristics,
similarity
equations.
mathematical
treatment
was
done
via
RK
technique
furnished
results.
have
capacity
control
fluid
motion
more
effectively
than
ordinary
combined
convection
better
where
rapid
movement
desired.
In
existence
EPNM,
higher
prominent
for
based
on
thermophysical
values.
Further,
skin
friction
Nusselt
number
optimum
against
.
