Processes,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2742 - 2742
Published: Dec. 3, 2024
In
recent
years,
global
efforts
toward
sustainable
energy
have
intensified,
aiming
to
reduce
carbon
emissions
and
boost
efficiency.
Heating
in
winter
hot
water
for
hygiene
are
essential,
especially
cold
climates
where
heating
demands
significantly
impact
household
consumption.
This
study
examines
a
city
western
Inner
Mongolia,
characterized
by
severe
climate
unique
geology.
A
test
system
with
dual
U-shaped
buried
pipes
ground
source
heat
storage
extraction
was
constructed,
utilizing
two
layout
schemes.
Drilling
tests
measured
formation
parameters,
highlighting
how
pipe
soil
characteristics
influence
storage.
Short-term
5-day
cycles
cross-seasonal
60-day
were
tested.
Results
showed
upper
suited
frequent
short-term
storage,
while
lower
favored
long-term
retention.
Increasing
raised
temperature
capacity,
enhancing
thermal
stability
cycles.
However,
the
capacity
improved,
loss
also
rose.
Effective
pump
design
regions
should
consider
environmental
temperatures,
optimization,
characteristics,
duration
achieve
stable,
efficient
operation.
Case Studies in Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
60, P. 104705 - 104705
Published: June 18, 2024
Medium-deep
U-shaped
butted
well
(MUBW)
is
one
of
the
most
potential
geothermal-heating
way.
However,
thermal
interference
may
happen
during
long-term
geothermal
extraction
period,
which
results
in
a
heating
performance
attenuation.
In
this
work,
heat
transfer
and
surrounding
rock-soil
temperature
distribution
characteristics
MUBW
whole
life
cycle
were
investigated.
The
three-dimension
full-size
model
for
was
proposed
different
structure
sizes
considered.
showed
that
more
likely
to
high
load
condition
conventional
size.
By
increasing
horizontal
length
from
200
m
600
m,
average
specific
could
increase
by
26.1
%.
When
vertical
depth
increases
3000
47.0
%
at
least.
It
noted
annual
inlet
outlet
temperatures
decrease
5.1
°C
cycle,
should
be
considered
design
on
system
operation.
Additionally,
large
enough
avoid
with
2000∼3000
m.
This
study
has
practical
meaning
ensuring
sustainable
MUBW.
