International Multidisciplinary Scientific GeoConference SGEM ...,
Год журнала:
2023,
Номер
23, С. 273 - 280
Опубликована: Дек. 15, 2023
The
article
examines
the
possibility
of
using
corrugated
pipes
in
evaporator
to
intensify
heat
exchange
process.
A
computer
model
was
constructed
finite
element
method
Fluent
ANSYS.
Performed
simulation
boiling
process
liquid
a
smooth
and
pipe
check
it
for
adequacy.
According
modeling
results,
carry
out
comparative
analysis
quantitative
qualitative
indicators
pipe.
temperature
value
set.
volume
vapor
phase
determined
transfer
coefficients
both
types
were
calculated.
coefficient
is
3296
W/(m2�
K),
which
almost
52%
more
than
one.
adequacy
obtained
values
checked
by
comparing
results
with
calculated
theoretically.
Provided
recommendations
on
feasibility
optimizing
their
geometric
configuration
future.
This
study
can
be
used
engineers
at
stages
designing
equipment.
further
stage
this
will
effect
corrugation
geometry
efficiency
transfer.
Nanomaterials,
Год журнала:
2025,
Номер
15(4), С. 302 - 302
Опубликована: Фев. 16, 2025
The
development
of
nanofluids
(NFs)
has
significantly
advanced
the
thermal
performance
heat
transfer
fluids
(HTFs)
in
heating
and
cooling
applications.
This
review
examines
synergistic
effects
different
nanoparticles
(NPs)-including
metallic,
metallic
oxide,
carbonaceous
types-on
conductivity
(TC)
specific
capacity
(SHC)
base
like
molecular,
molten
salts
ionic
liquids.
While
adding
NPs
typically
enhances
TC
transfer,
it
can
reduce
SHC,
posing
challenges
for
energy
storage
sustainable
management.
Key
factors
such
as
NP
composition,
shape,
size,
concentration,
fluid
selection
are
analyzed
to
understand
mechanisms
driving
these
improvements.
also
emphasizes
importance
interfacial
interactions
proper
dispersion
stability.
Strategies
optimizing
formulations
utilizing
solid-solid
phase
transitions
proposed
enhance
both
SHC
without
increasing
viscosity,
a
common
drawback
NFs.
By
balancing
properties,
NFs
hold
great
potential
renewable
systems,
particularly
improving
efficiency.
outlines
future
research
directions
overcome
current
expand
application
solutions,
contributing
reduced
carbon
emissions.
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102648 - 102648
Опубликована: Авг. 13, 2024
In
the
foreseeable
future,
heat
exchangers
will
continue
to
play
an
important
role
in
environmental
management
and
have
numerous
applications,
their
geometry
has
been
subject
of
interest
for
many
researchers.
The
main
goal
this
research
is
improve
exchangers'
thermal
performance
exergetic
efficiency
using
new
type
nanofluid.
concept,
effect
nanoencapsulated
phase
change
material
(NEPCM)
addition
water
producing
NEPCM
nanofluid
transfer
augmentation
shell
tube
exchanger
(STHE)
was
investigated,
experimentally.
Nanocapsules
were
synthesized
by
miniemulsion
polymerization
containing
(PCM)
as
core
chitosan
(GO/CS)
material.
After
synthesis
nanocapsules,
nanofluids
with
different
concentration
prepared
stability
thermophysical
properties
characterized.
subsequent
stage,
exergy
efficiencies
test
conducted
on
STHE
response
surface
method.
experiments
performed
at
conditions;
NPCM
(φ),
inlet
temperature
(Tin)
Re
number
optimse
efficiency.
optimum
level
φ,
Tin
maximum
ɛ
(73
%)
found
be
10.55
%,
78.35
°C
10365,
respectively.
experimental
results
demonstrated
that
proposed
could
enhance
system.
It
appears
a
combination
gives
better
cooling
rate
promising
alternative
along
other
techniques.
