ACS Omega,
Год журнала:
2024,
Номер
9(40), С. 41758 - 41775
Опубликована: Сен. 23, 2024
This
paper
proposes
a
new
class
of
novel
2D
layered
structured
materials,
such
as
MXene
(MX),
for
the
synthesis
innovative
nanofluids
coolants
to
evaluate
convective
heat
transfer
performance
double-pipe
exchanger
(DPHE).
Convective
experiments
were
successfully
conducted
in
lab-scale
fabricated
DPHE
using
low-concentration
by
varying
volume
concentration
nanoparticles
(0.01-0.05
vol
%)
different
base
fluids.
The
influence
on
various
parameters,
LMTD,
Nusselt
number,
coefficient,
and
rate
without
any
inserts
was
experimentally
investigated.
results
revealed
that
coefficient
number
increase
with
increasing
Reynolds
(Re)
Maximum
enhancement
(126%)
achieved
methanol-based
at
0.05
%.
Moreover,
exhibits
maximum
∼50%
methanol-
water-based
nanofluids.
In
contrast,
thermal
factor
also
estimated,
it
observed
water-
based
showed
higher
values
than
castor
oil-
silicone
oil-based
Finally,
LMTD
coefficients
validated
Aspen
HYSYS
12.1
software.
Innovative Technologica Methodical Research Journal,
Год журнала:
2024,
Номер
3(3), С. 10 - 10
Опубликована: Фев. 20, 2024
Instalasi
pemasangan
pipa
air
bersih
di
dusun
Klampok
bertujuan
untuk
mengalirkan
dari
sumber
hingga
ke
rumah
warga.
Air
dialirkan
menggunakan
jenis
PVC
dengan
diameter
2
inch
pada
kedalaman
63
meter.
Penelitian
ini
dilakukan
menguji
instalasi
yang
telah
dipasang
apakah
terdapat
kebocoran
atau
tidak.
Uji
melakukan
pengamatan
sepanjang
terpasang
selama
dua
jam,
apabila
jam
tidak
bocor
sambungan
nya,
maka
dinyatakan
lolos
uji
pipa.
Pengujian
selanjutnya
yaitu
ekspansi
linier
kehilangan
tekanan
(mayor
headloss)
akibat
gesekan
friksi
aliran
fluida
persamaan
Darcy-Weisbarch
kemudian
dihubungkan
antara
bilangan
Reynolds
sudah
dihitung
nilai
kekasaran
diagram
Moody.
kedua
dalam
fitting
(minor
k
tiap-tiap
dapat
dilihat
Tabel
Koefisien
Kerugian
Untuk
Komponen
Pipa.
Berdasarkan
hasil
pengujian
dan
tandon
warga
menunjukkan
bahwa
(lolos
pipa).
Hasil
adalah
(headloss)
sebesar
83,0551917
m.
9,43115
Applied Nano,
Год журнала:
2024,
Номер
5(2), С. 84 - 107
Опубликована: Июнь 11, 2024
This
paper
presents
the
continuation
of
experimental
investigations
conducted
by
present
authors
to
measure
and
compare
thermal
fluid
dynamic
performance
a
residential
hydronic
air
coil
using
nanofluids.
The
prior
experiments
were
limited
testing
only
one
volumetric
concentration
(1%)
aluminum
oxide
(Al2O3)
nanofluid.
They
compared
it
with
base
fluid,
60%
ethylene
glycol/40%
water
mixture
mass
(60%
EG).
original
tests
revealed
some
deficiencies
in
setup,
which
was
subsequently
revised
improved.
summarizes
results
from
improved
test
bed
three
concentrations
Al2O3
nanofluids:
1,
2,
3%
prepared
an
average
particle
size
45
nm
EG
dispersion.
these
simulates
small
handling
system
typical
heating,
ventilation,
conditioning
(HVAC)
applications
cold
regions.
Entering
conditions
for
liquid
selected
emulate
commercial
systems
operating
climates.
Contrary
previous
findings,
our
that
nanofluids
did
not
perform
as
well
expected.
Prior
predictions
many
analytical
numerical
studies
had
promised
significant
gain.
1%
nanofluid
generally
equal
under
identical
inlet
conditions.
However,
2%
considerably
lower
than
fluid.
higher
exhibited
heat
rates
up
14.6%
44.3%
transfer
coefficient.
Al2O3/60%
100%
pressure
drop
across
considering
output.
degradation
attributed
inability
maintain
dispersion
stability,
agglomeration,
subsequent
decline
thermophysical
properties.
