This
study
demonstrates
the
potential
of
waste
heat
recovery
using
transcritical-subcritical
parallel
ORC
with
various
working
fluids.
The
research
evaluates
cycle's
performance
thermodynamic
and
thermo-economic
models
consideration
five
different
Among
these
fluids,
R123
is
found
to
achieve
highest
exergy
efficiency
when
used
as
fluid
in
proposed
system.
To
assess
economic
performance,
concept
specific
investment
cost
(SIC)
employed,
which
quantifies
ratio
total
net
output
power.
results
indicate
that
offers
best
for
system,
resulting
lowest
SIC,
amounting
3107
$/kW.
On
other
hand,
R600a
produces
value
same
operating
conditions,
3688
findings
highlight
favorable
its
advantage
terms
SIC.
Conversely,
presents
under
similar
conditions.
Finally,
genetic
algorithm
(GA)
employed
perform
a
multi-objective
optimization
reveal
bi-objective
framework,
reaches
peak
at
47.62%,
aligning
SIC
2643
Chemosphere,
Journal Year:
2024,
Volume and Issue:
353, P. 141420 - 141420
Published: Feb. 18, 2024
The
optimal
utilization
of
biomass
relies
heavily
on
the
specific
material
and
individual
needs.
Cereal
by-products
can
potentially
be
employed
in
thermochemical
processes
such
as
pyrolysis
gasification.
To
compare
sources,
ultimate
analysis,
biochar
potential,
proximate
thermal
gravimetric
price
per
megajoule
generated
heat,
surface
texture,
availability
are
used.
A
global
survey
wastes
opportunities
for
heat
generation
is
presented
current
article.
Here,
nine
different
cereal-based
agricultural
waste
products
(barley,
wheat,
millet,
oats,
rice,
rye
straw,
sorghum
straw/stalk,
maize
cob)
studied.
compared
based
calorific
value,
water
content,
volatile
matter,
ash
content
chemical
composition,
bulk
density,
charring
properties,
availability,
transportation.
According
to
estimate,
156
million
metric
tonnes
year,
or
6%
India's
total
emissions,
could
eliminated
by
rice
husk
alone.
Wheat
straws,
other
hand,
cut
emissions
2%.
Additionally,
processing
these
feedstocks
might
result
production
40
GW
electrical
energy,
which
would
increase
installed
capacity
national
electric
grid
9%.
Energy Conversion and Management,
Journal Year:
2024,
Volume and Issue:
307, P. 118376 - 118376
Published: April 3, 2024
Integrating
renewable
energy
sources
into
systems
is
crucial
for
sustainability
and
reducing
CO2
emissions.
The
sorption-enhanced
gasification
process,
when
combined
with
renewables,
offers
a
path
toward
sustainable
systems.
In
this
study,
novel
integration
of
solar-based
process
biomass
proposed,
aiming
electricity
hydrogen
generation.
entire
system's
performance
has
been
investigated
from
the
perspectives
energy,
exergy,
economics,
emergy
analysis.
Furthermore,
response
surface
methodology
employed
to
optimize
overall
system
in
terms
exergy
efficiencies
levelized
cost
energy.
study's
results
reveal
that
integrated
shows
its
optimum
operational
condition
at
steam-to-biomass
ratio
0.53
capture
efficiency
65
%.
determined
be
67.2
%
net
electrical
power
generation
5.251
MW.
whole
71.89
Optimization
report
7.87
$/MWh.
From
analysis
perspective,
indicate
introduced
system,
renewability
index
0.22,
low
dependency
on
non-renewable
inputs.
With
1.95,
qualifies
as
moderately
sustainable,
demonstrating
superior
compared
conventional
co-generation
Energy Conversion and Management,
Journal Year:
2024,
Volume and Issue:
306, P. 118318 - 118318
Published: March 18, 2024
Although
the
recycling
of
polyethylene
terephthalate
(PET)
bottles
is
well-operating
in
several
countries,
less
than
10%
PET
plastic
waste
was
recycled
a
closed
loop
globally,
and
rest
discarded
as
leakage.
A
process
to
recover
hydrogen
valuable
chemicals
through
solar-assisted
sorption-enhanced
gasification
analyzed.
steam
with
CaO
calcium
looping
processes
were
already
experimentally
studied
our
previous
work
obtain
optimized
processing
conditions.
In
this
paper,
integrated
product
purification,
power
plant,
LiBr-H2O
absorption
chiller
simulated
Aspen
Plus
based
on
experimental
results
investigate
techno-economic
performance.
Material
flows,
energy
balance,
exergy
destruction,
economics
Day
night
mode
operations
at
different
seasons
evaluated
balance
weather
conditions
Naples,
Italy.
The
efficiencies
day
modes
varied
between
62%–72%.
annual
production
yields
benzene
684
t
6286
t,
respectively.
Due
high
benzene,
its
higher
price
(>1092
€/t)
would
make
project
feasible
larger
12%
internal
rate
return
value
competitive
break-even
(less
4
€/kg).
show
that
could
be
technically
economically
feasible.
It
has
potential
implemented
for
recovery
from
sustainable
solar
heat
source
zero
fossil
CO2
emissions.
