This
study
presents
a
novel
framework
to
evaluate
the
impact
of
certain
cycle
underwater
hull
and
propeller
cleaning
(UHPC).
The
artificial
neural
network
model
was
created
predict
FC,
coefficients
for
six
voyages
were
calculated.
Three
scenarios,
in
which
changed
different
ways,
established,
monthly
FC
values
calculated
accordingly.
annual
fuel
cost
saving,
when
UHPC
four
months
$10,402–26,685,
$9,653-24,102
months.
It
confirmed
that
yearly
CO2,
CO2e100,
CO2e20
emissions
could
be
reduced
by
79–192,
85–206,
92–222
t,
respectively.
As
result,
economic
environmental
effects
proven,
4-month
more
effective
than
6-month
cycle.
Journal of Marine Science and Engineering,
Год журнала:
2025,
Номер
13(5), С. 977 - 977
Опубликована: Май 18, 2025
This
study
investigates
the
environmental
and
economic
performance
of
integrating
a
proton
exchange
membrane
fuel
cell,
battery
systems,
an
organic
Rankine
cycle-based
waste
heat
recovery
system
for
ship
electrification.
The
analysis
examines
onboard
ammonia
decomposition
hydrogen
production
pathways.
Additionally,
benchmarks
effectiveness
against
green
bunkering
scenarios
(H2-BS).
is
based
on
data
collected
over
two
years
from
bulk
carrier
provided
by
Laskaridis
Shipping
Co.,
Ltd.
includes
well-to-wake
emissions
calculations.
At
same
time,
assessed
through
levelised
cost
energy
(LCOE)
computations
2025
2040,
factoring
in
different
carbon
price
scenarios.
Consequently,
utilises
Complex
Proportional
Assessment
method
to
compare
configurations
featuring
various
pathways
across
cases.
results
indicate
that
pink
feedstocks
achieve
maximum
equivalent
dioxide
reductions
electrification
plant
up
47.28%
48.47%,
respectively,
compared
H2-BS
95.56%
95.66%
base
scenario.
Ammonia
systems
prove
more
economically
viable
than
due
lower
storage
costs,
leading
competitive
LCOE
values
improve
under
higher
pricing
Ships and Offshore Structures,
Год журнала:
2024,
Номер
unknown, С. 1 - 13
Опубликована: Май 21, 2024
This
study
aims
to
thoroughly
understand
and
analyze
the
Cargo
Oil
Pump
Turbine
(COPT)
system
on
tanker
ships
through
thermodynamic
numerical
simulations.
The
goal
is
find
best
pump
capacities
match
different
cargo
discharge
rates
properties.
A
parametric
has
been
performed
COPT
by
building
a
model
including
exergy
analysis,
centrifugal
model.
design
of
experiment
applications
which
are
factorial
response
surface
methodology
(RSM)
have
determined
optimal
capacity
findings
demonstrate
that
risky
flow
rate
region
for
cavitation,
if
density
vapour
pressure
close
limits,
between
3050-3500
m3/h.
finds
operating
high
demands
at
4025
m3/h
where
efficiencies
highest,
RSM
calculates
optimum
low
1460.34
Journal of Marine Engineering & Technology,
Год журнала:
2024,
Номер
unknown, С. 1 - 16
Опубликована: Окт. 31, 2024
Blackouts
in
maritime
activities
can
cause
propulsion
loss
and
dangerous
conditions.
Bayesian
risk
analysis
is
applied
to
ship
blackout
incidents
this
study
improve
understanding
reduce
risks.
Using
Fault
Tree
Analysis
(FTA),
a
Network
(BN)
model
incorporates
fuel
quality,
lubricating
oil
sensor
error,
injector
mechanical
defects
estimate
probability.
The
analyses
how
hazards
their
interactions
affect
situation
using
probabilistic
inference.
Sensitivity
identifies
variables
that
probabilities
prioritises
mitigation
solutions.
Based
on
prior
posterior
probabilities,
'Automatic
Voltage
Regulator
Failure'
(0.03
prior,
0.17
posterior),
'Rotor
Mechanical
Fault'
0.15
'High
Cooling
Water
Temperature'
0.13
posterior)
are
the
top
three
causes.
Other
significant
include
'Switchboard
Line
Failure,'
'Faulty
Fuel
Pump,'
Open
Circuit,'
'Temperature
Sensor
relative
amounts.
identify
minimise
marine
concerns,
giving
decision-makers
comprehensive
framework
for
informed
decision-making
proactive
management.
This
research
emphasises
accidents'
importance,
improving
transportation
safety
reliability.
BIO Web of Conferences,
Год журнала:
2024,
Номер
134, С. 05007 - 05007
Опубликована: Янв. 1, 2024
Greenhouse
gas
emissions
are
something
that
contribute
to
climate
change,
which
is
getting
hotter
and
causing
concern
for
the
condition
of
earth.
The
shipping
sector
a
major
cause
greenhouse
emissions,
accounting
2.89%
anthropogenic
919
million
tonnes
CO2
emissions.
This
research
aims
present
different
types
fuel
cells
can
be
applied
vessels.
System
Literature
Review
(SLR)
method
in
this
study
review
data
sources
obtained
with
range
publications
2019-2024.
result
acquisition
2
used
8
ships.
SOFC
PEMFC.
Each
cell
produces
high
percentage
eficiency.
Both
integrated
into
other
technologies
such
as
GT,
ORC,
SRC,
ICE.
companies
support
development
KC,
WHB,
MCFC,
PAFC,
DEC,
LT.
Therefore,
have
potential
mitigate
due
marine
transport.
This
study
presents
a
novel
framework
to
evaluate
the
impact
of
certain
cycle
underwater
hull
and
propeller
cleaning
(UHPC).
The
artificial
neural
network
model
was
created
predict
FC,
coefficients
for
six
voyages
were
calculated.
Three
scenarios,
in
which
changed
different
ways,
established,
monthly
FC
values
calculated
accordingly.
annual
fuel
cost
saving,
when
UHPC
four
months
$10,402–26,685,
$9,653-24,102
months.
It
confirmed
that
yearly
CO2,
CO2e100,
CO2e20
emissions
could
be
reduced
by
79–192,
85–206,
92–222
t,
respectively.
As
result,
economic
environmental
effects
proven,
4-month
more
effective
than
6-month
cycle.
