Archives of Thermodynamics,
Год журнала:
2024,
Номер
unknown, С. 99 - 105
Опубликована: Июль 12, 2024
There
is
no
doubt
that
the
miniaturization
of
various
electronic
devices,
including
processors,
servers,
micro-electromechan-ical
system
etc.
has
resulted
in
increased
overall
performance.
However,
there
a
major
problem
with
thermal
management
these
as
well
many
others.
One
most
promising
solutions
liquid
cooled
microchannel
heat
sink.
In
current
work,
different
cases
open
micro
pin-fin
configurations
sink
were
considered.
The
con-figurations
considered
uniform
height
sink,
three-stepped
unidirectional
and
bi-directional
These
also
oriented
two
dissimilar
fashions,
i.e.
inline
staggered,
so
total
six
are
compared
analysed.
Using
single
phase
water
coolant
copper
substrate,
simulated
numerically
for
Reynolds
numbers
(10−160)
under
flux
500
kW/m2.
It
can
be
concluded
at
low
numbers,
steepness
does
not
contribute
much
both
staggered
arrangements,
while
higher
3
stepped
revealed
best
performance
due
to
boosted
fluid
mixing
more
projecting
secondary
flow.
Furthermore,
bi-direction-ality
shows
augmented
only
arrangement.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
60, С. 104619 - 104619
Опубликована: Май 29, 2024
This
study
presents
the
research
study,
both
theoretical
and
experimental,
on
effect
of
double
pass
solar
air
heater
(DPSAH)
using
staggered-diamond
shaped
fins
effects.
Diamond
are
considered
to
have
potential
improve
convective
heat
transfer
increase
energy
efficiency
as
well.
Forty
number
diamond
been
used
in
this
experiment
which
fixed
plate
absorber
where
there
four
mass
flow
rates
(0.0104
kg/s,
0.0157
0.0209
0.0261
kg/s)
three
variations
radiations
(600
,
800
1000
).
The
rates,
radiation
outlet
temperature
has
greatly
affected
overall
performance
DPSAH
with
fins.
For
computational
domain
fluid,
configuration
is
analyzed
COMSOL
Multiphysics
5.6.1,
hence
actual
carried
out
based
simulation
results.
highest
thermal
obtained
for
were
59.34%
62.01%
kg/s
irradiance
W/m2.
fThe
traditional
solar
air
heater
(SAH)
has
poor
thermal
performance
due
to
low
heat
transfer
coefficient.
Artificial
roughness,
flow
passage
alteration,
absorber
modification,
etc.
can
enhance
it.
Thus,
an
experimental
investigation
is
performed
study
the
thermohydraulic
characteristics
of
a
reverse
SAH
with
perforated
and
delta
wing
(DW)
structure.
The
present
investigates
effect
attack
angle
(15°–75°)
at
constant
streamwise
pitch
(35
mm),
transverse
(70
height
(
h
),
width
w
)
DW
20
mm,
under
Reynolds
number
(Re)
ranging
from
4000
000.
perforation
index
(PI
=
A
/
ap
for
inline
staggered
arrangements
are
9.52
4.76,
respectively.
results
indicate
that
concept
leads
enhanced
transfer,
reduced
pressure
drops,
utilization
energy.
Nusselt
(Nu),
friction
factor
f
about
6.6,
9.4,
3.06
times,
respectively,
75
o
arrangement
over
smooth
duct.
Thermohydraulic
reversed‐flow
compared
previously
published
works,
it
highlights
full‐length
offers
most
significant
improvements
in
factor.
