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
%.
Phase Transitions,
Год журнала:
2024,
Номер
unknown, С. 1 - 17
Опубликована: Окт. 21, 2024
Thermal
energy
storage,
particularly
through
Phase
Change
Materials
(PCMs),
is
gaining
significant
attention
for
its
ability
to
enhance
storage
capacity
and
thermal
conductivity.
PCMs
help
alleviate
the
strain
on
renewable
sources
stabilize
load
fluctuations.
This
study
integrates
a
novel
combination
of
LiNO3-NaSO4·10H2O-NaCl
with
boron
nitride
into
Flat
Plate
Collectors
(FPCs)
boost
system
performance.
Composite
Material
(CPCM)
increases
latent
heat
value
by
up
245.80
kJ,
enhancing
decomposition
absorption
rates
while
reducing
losses.
Boron
improves
conductivity
25%,
from
1.378
W/m·K
5.543
W/m·K,
increasing
CPCM's
charging
rate.
The
specific
rises
4.2
J/g·°C
5
at
maximum
temperature
90°C.
As
result,
collector's
efficiency
15%,
achieving
an
overall
88%.
Water
serves
as
transfer
fluid,
simulations
are
conducted
using
Python
in
Anaconda
Jupyter
Notebook.
Clean Energy,
Год журнала:
2024,
Номер
8(5), С. 186 - 217
Опубликована: Сен. 3, 2024
Abstract
Solar
air
heaters
(SAHs)
are
widely
used
solar
thermal
systems
with
applications
in
diverse
sectors.
However,
its
effectiveness
is
restrained
by
low
convective
heat
transfer
(HT)
coefficients
at
the
absorber
plate,
leading
to
inefficient
HT,
and
elevated
temperature
of
plate
causes
significant
losses,
reducing
efficiency.
This
study
addresses
these
challenges
introducing
ribs
or
roughness
on
creating
turbulence
airflow,
resulting
improvements.
The
research
investigates
various
rib
configurations,
influence
parameters,
performance
methods,
arrangements
evaluate
their
HT
friction
characteristics.
Among
a
comparative
analysis
done
factors
such
as
Nusselt
number
ratio,
enhancement
factor,
factor
efficiency
optimize
distinct
parameters
arrangement
patterns.
also
provides
valuable
recommendations
from
existing
literature,
offering
insights
into
effective
design,
prospects,
implementation
SAH
systems.
