Energies,
Journal Year:
2024,
Volume and Issue:
17(6), P. 1493 - 1493
Published: March 21, 2024
Underground
hydrogen
storage
facilities
require
cushion
gas
to
operate,
which
is
an
expensive
one-time
investment.
Only
some
of
this
recoverable
after
the
end
UHS
operation.
A
significant
percentage
will
remain
in
underground
as
non-recoverable
gas.
Efforts
must
be
made
reduce
it.
This
article
presents
results
modeling
withdrawal
cyclical
It
was
found
that
amount
fundamentally
influenced
by
duration
initial
filling
period,
flow
rate,
and
timing
upconing
occurrence.
Upconing
one
main
technical
barriers
deep
saline
aquifers.
The
ratio
(NRCG/CG)
decreases
with
increasing
highest
ratio,
0.63,
obtained
shortest
2-year
period.
lowest
0.35,
when
utilizing
longest
period
4
years
employing
largest
presented
cases
recovery
can
help
investors
decide
option
most
advantageous
based
on
criteria
are
important
them.
iScience,
Journal Year:
2023,
Volume and Issue:
27(1), P. 108771 - 108771
Published: Dec. 20, 2023
Hydrogen
storage
is
crucial
to
developing
secure
renewable
energy
systems
meet
the
European
Union's
2050
carbon
neutrality
objectives.
However,
a
knowledge
gap
exists
concerning
site-specific
performance
and
economic
viability
of
utilizing
underground
gas
(UGS)
sites
for
hydrogen
in
Europe.
We
compile
information
on
UGS
assess
potential
capacity
evaluate
associated
current
future
costs.
The
total
Europe
349
TWh
working
(WGE),
with
capital
costs
ranging
from
$10
million
$1
billion.
Porous
media
salt
caverns,
boasting
minimum
0.5
WGE,
exhibit
levelized
$1.5
$0.8
per
kilogram
hydrogen,
respectively.
It
estimated
that
can
potentially
decrease
as
low
$0.4
after
three
experience
cycles.
Leveraging
these
techno-economic
considerations,
we
identify
suitable
sites.
Petroleum Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 1, 2024
Amidst
the
rapid
development
of
renewable
energy,
intermittency
and
instability
energy
supply
pose
severe
challenges
impose
higher
requirements
on
storage
systems.
Among
various
technologies,
coupled
approach
power-to-hydrogen
(H2)
underground
H2
(UHS)
offers
advantages
such
as
extended
duration
large-scale
capacity,
making
it
highly
promising
for
future
development.
However,
during
UHS,
particularly
in
porous
media,
microbial
metabolic
processes
methanogenesis,
acetogenesis,
sulfate
reduction
may
lead
to
consumption
production
byproducts.
These
activities
can
impact
efficiency
safety
UHS
both
positively
negatively.
Therefore,
this
paper
provides
a
comprehensive
review
experimental,
numerical,
field
studies
interactions
within
aiming
capture
research
progress
elucidate
effects.
It
begins
by
outlining
primary
types
key
involved.
Subsequently,
introduces
experimental
approaches
investigating
gas-water-rock-microbe
interfacial
properties,
models
simulators
used
numerical
studies,
procedures
implemented
trials.
Furthermore,
analyzes
discusses
their
positive
negative
impacts
focusing
aspects
consumption,
flow,
safety.
Based
these
insights,
recommendations
site
selection,
engineering
operations,
on-site
monitoring
well
potential
directions,
are
provided.
