Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 1, 2024
Abstract
Brazil
is
crucial
to
tackling
climate
change
and
halting
biodiversity
loss.
Yet
given
its
intention
rely
on
biofuels
for
clean
energy,
there
a
growing
risk
that
uncoordinated
policy
leads
these
goals
compete
with
each
other.
Here
we
explore
their
interplay
through
long-term
energy
scenarios
based
spatially
explicit
system
model.
We
find
in
baseline
scenario
where
doubles
biofuel
use
by
2050,
substantial
dedicated
land
needed,
converting
mostly
degraded
pastures.
More
importantly,
appropriate
planning,
renewable
combined
can
meet
demand
highly
electrified
systems
emissions
decline
40%-91%
without
conflicting
conservation-relevant
lands
noticeable
effect
costs.
Finally,
be
reforested
thereby
contribute
up
15.43
Gton
of
carbon
stored,
showing
mitigation
ecosystem
recovery
synergistic.
Energy Conversion and Management X,
Journal Year:
2023,
Volume and Issue:
20, P. 100442 - 100442
Published: Aug. 24, 2023
The
economic
competitiveness
of
hydrogen-powered
aviation
highly
depends
on
the
supply
costs
green
liquid
hydrogen
to
enable
true-zero
CO2
flying.
This
study
uses
non-linear
energy
system
optimization
analyze
three
main
(LH2)
pathways
for
five
locations.
Final
at
dispenser
could
reach
2.04
USD/kgLH2
in
a
2050
base
case
scenario
locations
with
strong
renewable
source
conditions.
lead
cost-competitive
flying
hydrogen.
Reflecting
techno-economic
uncertainties
two
additional
scenarios,
cost
span
all
airport
ranges
between
1.37–3.48
USD/kgLH2,
if
import
options
from
larger
markets
are
also
available.
Import
setups
special
importance
airports
weaker
situation,
e.g.,
selected
Central
European
airports.
There,
on-site
might
not
only
be
too
expensive,
but
space
requirements
sources
large
feasible
implementation
densely
populated
regions.
Furthermore,
caused
by
sources,
electrolysis
systems,
and
liquefaction
plants.
Seven
detailed
design
rules
derived
optimized
systems
these
storage
components.
results
should
help
infrastructure
planners
general
industry
policy
players
prioritize
research
development
needs.
Energy Research & Social Science,
Journal Year:
2023,
Volume and Issue:
106, P. 103319 - 103319
Published: Nov. 8, 2023
Despite
growing
recognition
of
the
material
impacts
fossil
fuel
extraction
and
use,
many
economic
sectors
remain
highly
dependent
on
these
fuels.
Amid
pressure
to
-
at
a
minimum
appear
be
doing
something,
businesses
increasingly
communicate
actions
they
(seek
to)
take
reduce
their
environmental
impacts.
Oftentimes
aim
build
sense
compatible
coexistence
sector
with
particular
modes
sustainability.
For
air
transport,
'sustainable
aviation'
has
emerged
as
container
term
for
suite
proposed
by
sectoral
actors
in
seeking
align
social
This
paper
critically
interrogates
through
an
analysis
websites
reports
14
international
regional
airlines.
Our
reveals
multiple
diverse
ways
that
dominant
logics
(1)
underpin
status
quo,
(2)
depend
'the
science',
(3)
support
techno-organisational
changes
(4)
prioritise
growth.
By
recognising
gendered
nature
environmentalism,
we
suggest
can
viewed
active
enactment
aeromasculinities
–
system
thinking,
being
which
forecloses
radical
action
change
required
climate-safe
just
energy
future.
This
paper
presents
a
simple
explanatory
framework
to
analyse
the
diverse
strategies
proposed
by
civil
aviation
sector
in
attempts
reconcile
its
growth
tendencies
with
impact
on
natural
environment.
Despite
framing
industry
as
single
entity
that
has
problem
solve,
it
is
better
represented
set
of
actors,
each
responsible
for
various
constituent
systems
at
different
phases
their
respective
life
cycles.
To
elucidate
this
multi-actor
pursuit
higher-level
emergent
objectives,
firstly
an
overview
development
scenarios
dedicated
guide
towards
sustainability.
Given
tackled
such
strongly
depend
other,
sustainability
objective
relies
reconciling
all
agendas
and
contributions
unison,
making
them
collectively
compatible
dynamics
socio-economic
world.
coherently,
basic
description
arbitrary
system
coarse-grained
closed
causal
network
formulated.
A
categorisation
model
parameters
help
define
boundary
interaction
environment
unambiguously,
dispensing
need
know
details
represents
hand.
formalism
was
previously
derived
preliminary
sizing
performance
estimation
aeroplane
engines;
virtue
recursive
nature
coarse-graining
process,
same
can
be
used
describe
any
levels,
which
enables
small
(in
current
interest
being
propulsive
system)
integrated
into
multi-level
dependence
framework.
Then,
typical
evolution
are
re-framed
common
ground
formalism.
Subsequently,
extended
quantitative
energy-based
representation
formulate
qualitative
case
how
could
formulated
more
coherently
avoid
conflicting
local
optimisation
objectives
goals.
Finally,
entirety
presented
elements
brought
together
proposal
conceptualise
industrial
cycle
exchanges
matter,
energy
information
large-scale
The
argues
pave
way
simplification
high-level
enabling
coherent
understanding
mutual
between
much
complex
aeronautical
industry.
Energies,
Journal Year:
2024,
Volume and Issue:
17(5), P. 1151 - 1151
Published: Feb. 28, 2024
The
decarbonization
of
air
mobility
requires
the
its
energy.
While
biofuels
will
play
an
important
role,
other
low-carbon
energy
carriers
based
on
electricity
are
considered,
such
as
battery
electrification
and
liquid
hydrogen
(LH2)
or
eFuel,
a
hydrogen-based
carrier.
Each
carrier
has
own
conversion
steps
losses
integration
effects
with
aircraft.
These
combinations
lead
to
different
requirements
must
be
understood
in
order
compare
their
cost
CO2
emissions.
Since
they
all
electricity-based,
this
study
compares
these
using
well-to-rotor
methodology
when
applied
standard
vertical
take-off
landing
(VTOL)
mission.
This
novel
approach
allows
one
understand
that
choice
dictates
propulsive
system
architecture,
leading
aircraft,
which
can
significantly
change
required
for
same
mission,
increasing
it
from
400
2665
kWh.
deviations
led
significant
differences
emissions
costs.
Battery
is
impacted
by
manufacturing
but
lowest
consumption.
optimum
solution,
only
until
weight
lifted.
In
scenarios,
eFuel
more
efficient
than
LH2.
We
conclude
most
molecule
aircraft
compensate
extra
spent
ground.
Finally,
we
found
that,
each
carriers,
carbon
intensity
price
dictate
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 1, 2024
Abstract
Brazil
is
crucial
to
tackling
climate
change
and
halting
biodiversity
loss.
Yet
given
its
intention
rely
on
biofuels
for
clean
energy,
there
a
growing
risk
that
uncoordinated
policy
leads
these
goals
compete
with
each
other.
Here
we
explore
their
interplay
through
long-term
energy
scenarios
based
spatially
explicit
system
model.
We
find
in
baseline
scenario
where
doubles
biofuel
use
by
2050,
substantial
dedicated
land
needed,
converting
mostly
degraded
pastures.
More
importantly,
appropriate
planning,
renewable
combined
can
meet
demand
highly
electrified
systems
emissions
decline
40%-91%
without
conflicting
conservation-relevant
lands
noticeable
effect
costs.
Finally,
be
reforested
thereby
contribute
up
15.43
Gton
of
carbon
stored,
showing
mitigation
ecosystem
recovery
synergistic.
