Energy Reports,
Journal Year:
2021,
Volume and Issue:
7, P. 1293 - 1305
Published: Feb. 26, 2021
Air
leakage
around
the
in-seam
borehole
leads
to
a
poor
quality
of
gas
extracted,
thus
outburst
danger
is
difficult
eliminate
but
also
may
cause
other
disasters,
such
as
coal
spontaneous
combustion
and
explosion.
Moreover,
low
concentration
discharged
into
atmosphere
always
possesses
an
intense
greenhouse
effect.
To
investigate
multiphase
multifield
coupling
problem
extraction,
dual
medium
model
was
developed
in
this
study
describe
gas–air
mixture
flow
by
considering
influences
matrix
shrinkage
effective
stress
on
permeability.
And
calculated
3D
numerical
simulation
presented
ideal
matching
result
with
field
data.
Then,
key
factors
affecting
extraction
were
investigated
model.
It
found
that
elevated
increase
sealing
length
diameter,
reduced
augmentation
negative
pressure
Therefore,
we
improved
technology,
which
can
fully
seal
various
fractures
for
improving
extraction.
The
test
indicated
technology
1.91
times
traditional
method,
still
maintained
relatively
high
level
subsequent
stage
superior
application
results
work
help
optimizing
quality,
great
significance
CBM
exploitation
utilization,
reduce
emission
ensure
safe
mining.
Energy Reports,
Journal Year:
2021,
Volume and Issue:
7, P. 1903 - 1914
Published: April 14, 2021
Deep
shale
gas
reservoir
(3,500
∼
4,500
m)
of
Wufeng–Longmaxi
Formation
in
southern
Sichuan
Basin
China
has
great
potential
for
exploration
and
development,
with
resource
16.31
×
1012
m3,
counting
84%
the
total
resources
this
area.
And
deep
wells
Luzhou
west
Chongqing
have
achieved
good
development
results
past
two
years.
We
systematically
summarized
geological
characteristics
Formation,
discussed
facing
challenges
proposed
some
corresponding
strategies.
The
six
major
characteristics.
is
concentrated
depositional
center
deep-water
shelf
environment.
rich
silica
organic
carbon
while
low
calcium
clay.
Organic
pores,
inorganic
microfractures
are
developed
well
interconnected
to
form
networks.
Surface
porosity
generally
>
5%
increasing
depth.
content
4.7
7.5
m3/t,
higher
than
that
Changning,
Weiyuan,
Zhaotong
pressure
coefficient
greater
2.0
highest
Basin,
indicating
its
best
preservation
condition.
Up
now,
still
encountered
many
problems
challenges,
including
difficulty
accurately
obtaining
parameters,
unclear
high
production
mechanism,
urgent
need
optimal
quick
drilling
technology,
fracturing,
hydro-fracture
expansion
rules.
strategies
deepen
delicate
evaluation
clarify
rules
enrichment
wells,
strengthen
field
experiments
explore
effective
applicable
technologies
fracturing
China.
Energy Reports,
Journal Year:
2021,
Volume and Issue:
7, P. 523 - 536
Published: Jan. 19, 2021
Efficient,
safe,
and
environmentally
friendly
methods
for
the
low-carbon
utilization
of
coal
are
required
to
exploit
this
resource
as
a
source
cleaner
energy.
Tar-rich
can
produce
high
volume
oil
is
abundant
in
western
China.
Currently,
tar-rich
mostly
combusted
power
generation,
which
results
wastage
valuable
resources
serious
environmental
pollution.
Researchers
have
focused
on
achieving
zero
or
near-zero
carbon
emissions
while
alleviating
damage
pollution
geological
formations
when
mining
resources.
In
particular,
use
an
intelligent
unmanned
automatic
machine
(UAMM)
integrating
microwave
pyrolysis
technology
situ
conversion
into
gas
has
been
proposed.
However,
date,
studies
efficient
extraction
lacking.
study,
we
outline
state-of-the-art
developments
treatments
coal.
The
principles
advantages
heating
compared
with
traditional
discussed.
Further,
current
research
applications
microwave-assisted
processing
reviewed.
We
also
discuss
challenges
future
field
microwave-based
This
report
provides
reference
application
mining,
pyrolysis,
liquid
energy
based
UAMM.
Processes,
Journal Year:
2020,
Volume and Issue:
8(5), P. 586 - 586
Published: May 14, 2020
Three
types
of
organic
Rankine
cycles
(ORCs):
basic
ORC
(BORC),
with
single
regeneration
(SRORC)
and
double
(DRORC)
under
the
same
heat
source
have
been
simulated
in
this
study.
In
following,
energy
exergy
analysis
advanced
these
three
performed
compared.
With
a
conventional
analysis,
researchers
can
just
evaluate
performance
components
separately
to
find
one
highest
amount
destruction.
Advanced
divides
destruction
rate
into
unavoidable
avoidable,
as
well
endogenous
exogenous,
parts.
This
helps
designers
more
data
about
effect
each
component
on
other
real
potential
improve
its
efficiency.
The
results
illustrate
that
regenerative
ORCs
high
for
reducing
irreversibilities
compared
BORC.
Total
rates
4.13
kW
(47%)
5.25
(45%)
happen
avoidable/endogenous
parts
SRORC
DRORC,
respectively.
Additionally,
from
an
viewpoint,
priority
improvement
system
is
given
turbines,
evaporators,
condensers
feed-water
heaters,
Processes,
Journal Year:
2020,
Volume and Issue:
8(10), P. 1277 - 1277
Published: Oct. 12, 2020
Due
to
the
harmful
effects
and
depletion
of
non-renewable
energy
resources,
major
concerns
are
focused
on
using
renewable
resources.
Among
them,
geothermal
has
a
high
potential
in
volcano
regions
such
as
Middle
East.
The
optimization
an
organic
Rankine
cycle
with
heat
source
is
investigated
based
genetic
algorithm
having
two
stages.
In
first
stage,
optimal
variables
depth
well
extraction
flow
rate
fluid
mass.
value
well,
mass
rate,
temperature
found
be
2100
m,
15
kg/s,
150
°C.
second
efficiency
output
power
plant
optimized.
To
achieve
maximum
efficiency,
variable
pressure
high-temperature
exchanger.
optimum
values
production
equal
0.433
MW
14.1%,
respectively.
International Journal of Chemical Reactor Engineering,
Journal Year:
2021,
Volume and Issue:
19(11), P. 1179 - 1186
Published: Aug. 1, 2021
Abstract
Greenhouse
gas
(GHG)
pollution
is
considered
one
of
the
challenging
concerns
in
industrial
plants,
and
to
emit
appropriate
designation
nitrogen
oxide
reduction,
it
required
implement
proper
numerical
simulation
procedures.
In
this
study,
ANSYS
Fluent
®
software
used
as
dynamic
solve
heat
mass
flow
transfer
numerically
by
considering
non-structured
networks
for
complex
geometries.
Dry
burners
have
an
additional
thermocouple
provide
extra
fuel
pathway
combine
with
air.
Then,
standard
K-ε
simulations
calculate
thermal
efficiency
combustion
processes
turbulent
regimes.
It
can
cause
removal
50%
into
atmosphere.
Furthermore,
increase
temperature,
concentration
has
been
increased
system.
After
1975
K,
Fuel
changed
dry
fuel,
therefore
because
steam
a
relatively
non-combustible
compound
than
fuel.
On
other
hand,
regarding
water
volume
at
inlet
steam,
percentage
decreased
dramatically,
especially
first
periods
increase.
Consequently,
when
instead
water,
reduction
increased.
Moreover,
our
results
match
Gibbs
energy
equilibrium.
