Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Окт. 22, 2024
In
past
years,
concentrated
solar
power
(CSP)
with
an
energy
backup
system
has
been
a
unique
renewable
utilization
among
intermittent
systems.
It
could
allow
CSP
plant
to
operate
as
base
load
in
the
future.
This
paper
simulates
for
1
MWe.
Parabolic
trough
collector
(PTC)
array
and
linear
Fresnel
reflector
(LFR)
field
attached
consecutively
produce
superheated
steam
at
40
MPa.
The
Rankine
cycle
used
run
turbine
electricity
generator
is
convert
mechanical
into
electrical
energy.
Maximum
temperature
attained
inlet
418.13
˚C
12:00-13:00
time
slot
month
of
January.
Results
show
that
feasible
minimum
value
produced
by
1.01
MWe
November
10:00-11:00
whereas
maximum
generated
1.57
December
11:00-12:00
slot.
overall
efficiency
21.25%
January
An
storage
work
night
hours
or
cloudy
weather
conditions.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 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.
International Journal of Thermal Sciences,
Год журнала:
2024,
Номер
203, С. 109108 - 109108
Опубликована: Апрель 30, 2024
A
comprehensive
understanding
of
the
magnetic
field
interaction
with
flow
ferronanofluids
is
essential
to
determine
heat
transfer
effect
and
potential
for
use
in
industrial
applications.
The
purpose
this
work
effects
orientation
intensity,
as
well
inertia
forces,
on
laminar
a
ferronanofluid.
experiment
involved
five
permanent
magnets
positioned
both
below
above
flowing
magnetite-based
analysis
carried
out
using
similarity
numbers,
Reynolds
number
(ratio
viscous
forces),
forces)
product
two
forces).
findings
indicate
that
relative
temperature
gradient-induced
secondary
motions
plays
crucial
role
either
enhancing
or
inhibiting
transfer.
magnet
leads
improved
transfer,
while
placement
hinders
it.
To
ratio
force
introduced
MnRe
used.
Taking
5
%
Nusselt
change
threshold,
critical
value
tube
=
24,000,
configuration
below,
32,000
Re
109
88,000
150
163.
local
diminishes
fluid
flows,
ultimately
causing
parameters
revert
their
reference
state.
However,
an
increase
viscosity
forces
enables
propagate
over
longer
distance.
The
paper
presents
a
proposal
for
an
in-house
mathematical
model
of
liquid
flat-plate
solar
collector.
proposed
is
one-dimensional
distributed
parameter
enabling
simulations
the
collector
operation
under
arbitrarily
variable
boundary
conditions.
based
on
solution
energy
balance
equations
all
components
formulated
differential
are
solved
iteratively
using
implicit
difference
scheme.
In
order
to
obtain
stable
numerical
solution,
it
necessary
use
appropriate
steps
time
and
spatial
division.
These
were
found
by
comparing
results
obtained
from
with
analytical
available
in
literature
transient
state,
which
constitutes
novelty
present
study.
accuracy
was
verified
experimentally
measured
calculated
history
fluid
temperature
at
outlet
calculation
constant
as
example
practical
application.
compared
values
test
stand.
This
another
presented
research.
analysed
instantaneous
efficiency
then
selected
outdoor
can
also
be
used
verify
correctness
operation.
Comparing,
ongoing
basis,
outlet,
conclusions
drawn
about
process
glass
fouling
or
glycol
gelling.
model's
simplicity
low
computational
demands
enable
such
comparisons
online
mode.
Sustainability,
Год журнала:
2024,
Номер
16(14), С. 5924 - 5924
Опубликована: Июль 11, 2024
To
improve
the
heat
collection
performance
of
flat
plate
solar
collectors,
a
corrugated
collector
(CFPSC)
with
triangular
tube
was
first
innovatively
designed
in
this
paper.
The
effect
various
nanofluids
that
are
used
as
working
fluid
on
CFPSC
comprehensively
analyzed
based
characteristics
test
system
and
numerical
simulation
model.
results
indicate
when
CuO
Al2O3
were
nanoparticles,
stabilization
time
for
which
ethylene
glycol
(EG)
base
12.4~28.6%
longer
than
water
fluid.
Moreover,
EG,
temperature
difference
CuO-EG
nanofluid
under
different
radiation
intensities
about
5.8~19.2%
higher
water.
Furthermore,
superior
to
TiN
nanofluids.
Specifically,
2.9~4%
TiN-EG
at
intensities.
Therefore,
using
medium
designing
tubes
can
significantly
performance.
Energies,
Год журнала:
2024,
Номер
17(14), С. 3454 - 3454
Опубликована: Июль 13, 2024
The
paper
proposes
applying
an
in-house
mathematical
model
of
a
liquid
flat-plate
solar
collector
to
calculate
the
time
constant.
described
model,
proposed
for
first
in
earlier
study,
is
one-dimensional
distributed
parameter
enabling
simulations
operation
under
arbitrarily
variable
boundary
conditions.
based
on
solution
energy
balance
equations
all
components.
formulated
differential
are
solved
iteratively
using
implicit
difference
scheme.
To
obtain
stable
numerical
solution,
it
necessary
use
appropriate
steps
and
spatial
division.
These
were
found
by
comparing
results
obtained
from
with
analytical
available
literature
transient
state,
which
constitutes
novelty
present
study.
accuracy
was
verified
experimentally
measured
calculated
history
fluid
temperature
at
outlet
collector.
calculation
constant
as
example
model’s
practical
application.
compared
values
test
stand.
This
another
presented
research.
analysed
instantaneous
efficiency
then
selected
outdoor
can
also
be
used
verify
correctness
operation.
By
comparing,
ongoing
basis,
outlet,
conclusions
drawn
about
process
glass
fouling
or
glycol
gelling.
simplicity
low
computational
demands
enable
such
comparisons
online
mode.
International Journal of Thermal Sciences,
Год журнала:
2024,
Номер
205, С. 109312 - 109312
Опубликована: Авг. 6, 2024
Understanding
the
interaction
of
magnetic
field
with
inclined
ferronanofluid
flow
on
heat
transfer
is
an
important
element
in
industrial
applications
these
fluids.
Inclined
unavoidable
and
constitutes
a
large
part
technical
solutions.
In
order
to
intentionally
design
devices
employing
ferronanofluids,
especially
those
switchable
performance
under
influence
field,
it
necessary
explore
phenomena
behind
mass
flow.
The
purpose
this
work
determine
effect
upward
parameters
possibility
influencing
field.
For
purpose,
was
studied
for
30°,
60°
90°
angles
Reynolds
numbers
106,
185,
264,
397
subjected
two
configurations
generated
by
static
magnet.
main
conclusions
analysis
indicate
that
inclination,
respect
horizontal
position,
low
(Re
=
106
185)
leads
deterioration
As
relative
magnitude
inertia
forces
increases,
negative
decreases.
improving
permanent
magnet
limited.
process
must
be
determined
relation
mixed
convection
fluid.
direction
agreement
gravity
does
not
prevent
fluid
mixing,
noticeable
parameters.
However,
change
averaged
Nusselt
number
independent
tested
configurations,
suggesting
retains
symmetrical
character,
as
evidenced
similar
improvement
number.
Additionally,
indicates
occurred
each
conditions
studied.
regime
maps
available
literature
are
sufficient
clearly
therefore
need
updated
new
data.
