International Journal of Low-Carbon Technologies,
Journal Year:
2024,
Volume and Issue:
19, P. 2763 - 2782
Published: Jan. 1, 2024
Abstract
This
paper
discusses
an
innovative
polygeneration
system.
To
supplement
the
heat
source,
a
solar
system
under
linear
Fresnel
reflector
(LFRs)
is
incorporated.
The
findings
indicate
that
facility
can
generate
70.1
MW
of
net
electric
power,
1921.3
kg/h
methanol,
2936.4
oxygen,
267.5
m3/h
potable
water,
and
approximately
54.4
hydrogen.
From
energy
perspective,
demonstrates
efficiency
52.1%,
while
from
exergy
standpoint,
27.7%.
Additionally,
facility’s
total
environmental
footprint
operational
cost
are
estimated
to
be
around
0.292
Pts/s
0.931
$/s,
respectively.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(20), P. 9070 - 9070
Published: Oct. 19, 2024
As
a
clean
energy
source,
hydrogen
not
only
helps
to
reduce
the
use
of
fossil
fuels
but
also
promotes
transformation
structure
and
sustainable
development.
This
paper
firstly
introduces
development
status
green
at
home
abroad
then
focuses
on
several
advanced
production
technologies.
Then,
advantages
shortcomings
different
technologies
are
compared.
Among
them,
future
source
tends
be
electrolysis
water
production.
Finally,
challenges
application
prospects
process
technology
discussed,
is
expected
become
an
important
part
realizing
global
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(16), P. e35171 - e35171
Published: Aug. 1, 2024
In
this
research,
aligned
with
global
policies
aimed
at
reducing
CO2
emissions
from
traditional
power
plants,
we
developed
a
holistic
energy
system
utilizing
solar,
wind,
and
ocean
thermal
sources,
tailored
to
regions
optimal
for
conversion
(OTEC).
The
selected
site,
characterized
by
favorable
wind
solar
conditions
close
areas
high
OTEC
potential,
is
designed
meet
the
electricity
needs
of
coastal
community.
system's
core
components
include
an
Organic
Rankine
Cycle,
turbines,
thermoelectric
elements,
pumps,
heat
exchanger,
turbine,
collector.
A
detailed
analysis
thermodynamic
evaluation
based
on
principles
were
carried
out
using
Engineering
Equation
Solver
(EES)
software.
Key
factors
such
as
speed,
radiation,
collector
area
critical
in
determining
performance.
To
enhance
effectiveness,
conducted
comprehensive
comparison
optimization
algorithms,
incorporating
Non-dominated
Sorting
Genetic
Algorithm-II
(NSGA-II)
Pareto
front
value
optimization.
This
approach
significantly
outperformed
other
algorithms
Particle
Swarm
Optimization
(PSO),
Algorithm
(GA),
Simulated
Annealing
(SA)
terms
efficiency
cost-effectiveness.
achieved
exergy
14.46
%
cost
rate
$74.98
per
hour,
demonstrating
its
suitability
intended
functions.
Moreover,
exergoenvironmental
was
proposed
plant.
findings
revealed
that
key
component
HEX
has
factor
due
their
use
hot
water,
which
zero
unit
impact.
Additionally,
pumps
demonstrated
impact
factor,
indicating
negligible
component-related
environmental
impacts.
Sensitivity
further
evaluated
performance
parameters,
revealing
increases
irradiation
lead
decreased
total
rates,
while
higher
turbine
temperatures
resulted
remarkable
14.08
reduction
rate.
These
results
underscore
economic
viability
operating
strengthen
argument
adoption
financial
perspective.
International Journal of Low-Carbon Technologies,
Journal Year:
2024,
Volume and Issue:
19, P. 2093 - 2107
Published: Jan. 1, 2024
Abstract
The
MEPC
80
session
has
revised
the
International
Maritime
Organization
(IMO)
greenhouse
gas
strategy,
setting
more
ambitious
decarbonization
goals.
Carbon
capture
and
storage
(CCS)
technologies
have
shown
promise
in
reducing
maritime
carbon
emissions,
although
their
high-energy
requirements
often
been
neglected
previous
research.
This
study
introduces
a
novel
system
integrating
natural
engine,
CCS,
an
Organic
Rankine
Cycle
(ORC),
power
turbine
(PT).
An
exhaust
bypass
strategy
is
used
to
enhance
engine
performance
at
low
medium
loads,
channeling
PT
for
generation.
engine’s
waste
heat
fully
utilized
CCS
via
cold,
heat,
power.
compares
various
absorbents
system,
including
monoethanolamine
piperazine
solutions,
which
show
different
efficiencies.
Additionally,
CO2
conditions
are
analyzed
compared.
proposed
shows
potential
significantly
Energy
Efficiency
Design
Index
general
cargo
ships.
addresses
demands
of
by
utilizing
transforming
drawback
into
beneficial
resource.
By
ORC
PT,
not
only
captures
but
also
improves
overall
energy
efficiency,
presenting
promising
solution
decarbonization.
analysis
further
enhances
understanding
effective
management.
innovative
demonstrates
that
with
strategic
integration
optimization,
significant
progress
can
be
made
toward
achieving
stricter
targets
set
IMO
while
enhancing
efficiency
operations.
International Journal of Low-Carbon Technologies,
Journal Year:
2024,
Volume and Issue:
19, P. 1801 - 1813
Published: Jan. 1, 2024
Abstract
This
study
focuses
on
the
development
and
improvement
of
a
new
combined
power
cooling
system
called
power-cooling
cogeneration
(PCCS).
The
PCCS
incorporates
tri-tier
waste
heat
recovery
that
includes
an
organic
Rankine
cycle
(ORC)
ejector-driven
refrigeration
mechanism.
design
thorough
assessment
thermodynamic
efficiency,
cost-efficiency,
environmental
consequences.
A
dual-objective
optimization
technique
is
developed
to
decrease
expenses
while
simultaneously
improving
exergy
efficiency.
In
addition,
complex
behavior
compared
standard
uses
one-stage
recovery-ORC
compressor-based
approach.
Also,
effectiveness
was
evaluated
through
utilization
several
environmentally
friendly
refrigerants.
Environmental
evaluations
employ
two
metrics:
total
equivalent-warming
impact
(TE-WI)
life
cycle-climate
performance
(LC-CP),
emphasizing
substantial
reductions
in
harm
improved
recovery.
results
demonstrate
R1234-yf
refrigerant
achieves
best
possible
both
configurations,
resulting
significant
increase
roughly
10.1%
exergetic
efficiency
system.
Simultaneously,
experiences
loss
annual
costs
around
7.25%
21.16%,
respectively,
as
baseline.
Incorporating
ejector
into
has
potential
reduce
carbon
dioxide
emissions
by
up
11.41
×
106
kg.
