Journal of Mechanical Materials and Mechanics Research,
Год журнала:
2023,
Номер
6(2), С. 1 - 13
Опубликована: Апрель 23, 2023
Compact
heat
exchangers
(CHE)
improve
the
transfer
rate
with
lighter
weight
and
lower
volume
than
other
counterparts.
An
important
point
in
CHEs
is
their
higher
pressure
drop
relative
to
conventional
exchangers.
This
study
aims
investigate
some
proposed
models
of
these
with/without
vortex
generators
(VGs)
different
cases.
A
hot
fluid
temperature
350°C
flowing
through
tubes
a
cold
300°C
circulating
inside
shell
are
assumed.
To
this
end,
several
VGs
sinusoidal
wavy
shapes
designed
examined
amplitudes
sine
wave
lengths
determine
effects
parameters
on
along
exchanger
length.
In
2D
steady-state
laminar
flow,
governing
equations
discretized
using
finite
element
method
analyzed
for
Reynolds
numbers
400
1000
ANSYS
software.
Finally,
5.06%
increase
Nusselt
number,
amplitude
1
length
6
mm
quantitatively
indicated
best
performance
terms
(London
factor)
among
studied
Heat Transfer Engineering,
Год журнала:
2023,
Номер
45(14), С. 1206 - 1221
Опубликована: Авг. 22, 2023
In
this
study,
the
effects
of
fin
configurations
and
layouts
on
thermal
hydraulic
performances
in
a
printed
circuit
heat
exchangers
with
supercritical
liquefied
natural
gas
as
working
fluid
are
numerically
studied,
overall
transfer
performance
is
evaluated
by
factor.
Firstly,
effect
three
different
airfoil
configurations,
i.e.,
NACA
0024,
0024
vortex
generator,
curved
generator
(CVG)
investigated.
The
comparative
results
indicate
that
CVG
combined
offers
best
performance.
Furthermore,
minimum
transverse
distance
analyzed
detail.
show
for
given
configuration,
should
not
be
too
small
or
large,
so
longitudinal
vortices
(LVs)
generated
will
interact
each
other
LVs'
influences
may
reach
longer
distance.
optimal
1.75
maximum
thickness.
Finally,
attack
angle
studied.
45°
improving
performance,
an
arrangement
suggested.
Journal of Mechanical Materials and Mechanics Research,
Год журнала:
2023,
Номер
6(2), С. 1 - 13
Опубликована: Апрель 23, 2023
Compact
heat
exchangers
(CHE)
improve
the
transfer
rate
with
lighter
weight
and
lower
volume
than
other
counterparts.
An
important
point
in
CHEs
is
their
higher
pressure
drop
relative
to
conventional
exchangers.
This
study
aims
investigate
some
proposed
models
of
these
with/without
vortex
generators
(VGs)
different
cases.
A
hot
fluid
temperature
350°C
flowing
through
tubes
a
cold
300°C
circulating
inside
shell
are
assumed.
To
this
end,
several
VGs
sinusoidal
wavy
shapes
designed
examined
amplitudes
sine
wave
lengths
determine
effects
parameters
on
along
exchanger
length.
In
2D
steady-state
laminar
flow,
governing
equations
discretized
using
finite
element
method
analyzed
for
Reynolds
numbers
400
1000
ANSYS
software.
Finally,
5.06%
increase
Nusselt
number,
amplitude
1
length
6
mm
quantitatively
indicated
best
performance
terms
(London
factor)
among
studied
