Numerical Heat Transfer Part A Applications,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 24
Published: July 26, 2024
The
fracture
connectivity
in
enhanced
geothermal
systems
plays
a
vital
role
the
process
of
heat
extraction.
In
this
paper,
coupled
thermo-hydro-mechanical
model
with
discrete
fractures
is
developed
to
investigate
influence
on
extraction
performance
doublet
system.
proposed
adopts
assumptions
one-dimensional
element
and
thin
elastic
layer.
influences
spacing
or
two
efficiency
are
investigated
under
varying
thermal
conductivity
permeability
ratios.
evolutions
aperture,
production
temperature,
rate
analyzed.
simulations
indicate
that
key
factors
influencing
recovery,
listed
order
decreasing
impact,
ratio,
connectivity,
bedrock
conductivity.
When
ratio
exceeds
10−6,
convection
becomes
dominant
factor,
thereby
diminishing
impact
connectivity.
contrast,
when
greater
than
3
W/(m·K),
conduction
takes
precedence,
by
preferential
flow
paths
resulting
from
research
results
have
important
guiding
significance
for
optimization
design
strategy
reservoirs.
Energy Storage,
Journal Year:
2025,
Volume and Issue:
7(2)
Published: Feb. 19, 2025
ABSTRACT
This
paper
presents
an
optimization
study
of
the
thermal
performance
a
double
U‐tube
borehole
heat
exchanger
(BHE)
with
two
independent
circuits
that
can
be
used
in
energy
storage.
The
applies
Taguchi
method
and
utility
concept
to
obtain
optimum
parameters
for
objective
functions:
maximum
transfer
rate
effectiveness
BHE.
A
validated
numerical
model
fully
implicit
is
applied
compute
transient
results
revealed
optimal
factors
(denoted
letters
numbers
showing
their
levels)
achieving
are
1
B
3
C
2
D
E
F
G
H
,
respectively.
resulted
120
W/m
69.3%.
Using
method,
single
set
by
levels
as
)
obtained
maximize
These
yielded
87.3
54.6%.
Finally,
analysis
variance
(ANOVA)
showed
ground
conductivity,
inlet
temperature
working
fluid,
depth
most
influential
affecting
provides
crucial
information
improvement,
enhanced
savings,
reduced
environmental
impact,
hybrid
source
pump
system
integrated
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(15), P. e35718 - e35718
Published: Aug. 1, 2024
Ground
heat
exchanger
(GHE)
is
the
most
crucial
element
of
a
ground
source
pump
(GSHP)
system
for
building
cooling
and
heating
by
utilization
geothermal
energy.
Therefore,
intending
to
enhance
performance
GHE,
present
study
conducts
computational
investigation
thermal
modified
spiral
tube
vertical
GHEs.
Several
modifications
uniform-pitched
GHE
are
made
increase
its
performance.
Some
introduced
as
variable-pitched
where
inlet
pipes
densified
in
lower
part
GHEs
reducing
pitch
distance.
Conversely,
some
modifications,
position
outlet
straight
pipe
changed.
Water
considered
working
fluid
temperature
water
maintained
fixed
at
300.15
K.
After
extensive
analysis,
it
evident
that,
when
placed
outside
coil,
there
7.67
%
enhancement
than
traditional
GHE.
However,
like
not
significant
improve
due
quick
saturation
soil
around
pipes.
To
have
balance
between
transfer
rate
pressure
drop,
capability
(TPC)
coefficient
improvement
Heat Transfer,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 10, 2024
Abstract
Automotive
radiators
are
primarily
utilized
in
vehicles
to
dissipate
the
heat
generated
by
engine
block
into
surrounding.
Utilizing
coolants
with
superior
thermophysical
properties
reduces
power
consumption
and
improves
cooling
performance.
Comprehending
correlation
between
coolant
characteristics
its
thermohydraulic
behavior
is
essential
for
advancing
this
innovative
technology.
This
investigation
introduces
a
detailed
parametric
study
of
an
automotive
radiator
using
diversified
mixtures.
Ethylene
glycol
(EG)/water
mixtures,
namely,
(40:60),
(50:50),
(60:40)
as
coolant.
The
influences
operational
mechanism
parameters,
that
is,
inlet
temperature,
intake
air
airflow
rate,
flowrate,
mixture
ratio
on
effectiveness,
transfer,
fluid
flow
investigated.
A
coupled
model,
based
effectiveness‐NTU
thermal
resistance
theories,
developed
simulation
investigated
radiator.
outcomes
revealed
transfer
rate
more
significantly
influenced
temperatures
than
flowrate.
Findings
reveal
optimal
conditions
design
be
(40
EG:60
Water),
Reynolds
number
1087.5,
2175,
11°C
air‐intake
94.25°C
temperature
maximization.
findings
also
indicated
optimum
yielded
maximum
advantage
(AR)
lowest
pumping
power,
which
achieved
7.94%
19.30%
higher
AR
compared
(50:50)
solutions,
respectively.
From
energy
reduction
prospective,
EG/water
results
25.11%
49.77%,
respectively,
under
same
operating
conditions.
Conclusively,
optimized
explored
offers
promising
approach
improving
vehicle
technology
increasing
efficiency
internal
combustion
engines.
