International Journal of Low-Carbon Technologies,
Journal Year:
2023,
Volume and Issue:
18, P. 1095 - 1106
Published: Jan. 1, 2023
Abstract
The
exhaust
waste
heat
of
the
fossil-fired
power
plants
and
some
generation
technologies
(such
as
fuel
cells)
is
a
rich
source
recoverable
thermal
energy.
Meanwhile,
effective
use
cell's
in
downstream
processes
units
can
improve
thermodynamic
superiority,
reduce
environmental
impacts
caused
by
release
environment
enhance
attractiveness
sustainability
energy
process.
Here,
multi-variable
analysis
(thermodynamic,
economic
assessments)/optimization
low-carbon
cogeneration
process
(power
cooling
capacity
production
system)
are
proposed
investigated.
works
under
from
cell,
an
ejector
refrigeration
cycle
organic
Rankine
(ORC)-driven
tri-stage
recovery
system.
A
bi-objective
optimization
based
on
identifying
maximum
value
exergy
efficiency
minimum
total
cost
To
highlight
advantages,
behavior
considered
compared
with
system
that
compressor
single-stage
(as
reference
process).
According
to
results,
provide
approximately
10%
higher
Moreover,
overall
be
about
20%
lower
amount
emitted
CO2
mitigated
nearly
11
thousand
tons
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(7), P. e29087 - e29087
Published: April 1, 2024
Effective
and
maximum
utilization
of
waste
heat
from
industrial
processes
fossil
plants
can
improve
thermodynamic
performance
declined
the
environmental
impacts
discharge
to
atmosphere.
Here,
multi-aspect
assessment
optimization
a
novel
cogeneration
power
cooling
load
cycle
(CPCC)
is
developed.
The
considered
process
designed
under
three-level
recovery
consisting
an
ORC
(organic
Rankine
cycle)
unit
ejection-based
refrigeration
process.
Thermodynamic
performance,
cost
feasibility
assessments
suggested
have
been
comprehensively
evaluated
discussed.
A
two-objective
developed
minimize
total
maximize
exergy
efficiency.
Moreover,
comprehensive
CPCC
behavior
compared
with
reference
system
(a
single-level
recovery/ORC
compression-based
process).
also
examined
various
environmentally
compatible
refrigerants.
analysis
based
on
two
indicators
(i.e.,
life
cycle-climate
equivalent-warming
impacts).
Due
multi-level
heat,
emitting
into
environment
are
significantly
reduced.
outcomes
revealed
that
R1234/yf
as
most
suitable
refrigerant
causes
optimum
achievements
for
both
systems.
exergetic
improved
by
about
10.3%
system,
while
destruction
annual
CPCC,
respectively,
reduced
approximately
7.4%
21.6%
cycle.
It
was
found
11,640
tons
carbon
dioxide
be
using
ejector
in
Thermal Science and Engineering Progress,
Journal Year:
2024,
Volume and Issue:
53, P. 102718 - 102718
Published: June 28, 2024
Using
gas
turbine
cycles
in
power
generation
layouts
can
lead
to
a
significant
amount
of
waste
energy.
The
combined
Brayton
and
inverse
cycle
(IBC),
which
are
used
such
systems,
has
considerable
energy
the
heat
rejection
stage
exhausted
gas,
not
been
considered
previous
studies.
In
present
research,
simple
coupled
IBC
(Configuration
1)
is
compared
with
multi-generation
system
2)
hot
water
unit,
thermoelectric
generator
(TEG),
an
absorption
chiller
added
Configuration
1
for
utilization
IBC.
Furthermore,
produced
TEG
directed
proton
exchange
membrane
electrolyzer
reverse
osmosis
desalination
unit
hydrogen
potable
outputs.
Results
show
that
although
total
investment
cost
rate
2
higher
than
1,
fuel
rate,
environmental
exergy
destruction
lower.
at
best
performance
point,
efficiency
products
equal
40.77%
63.19
$/GJ.
They
by
5%
2%,
respectively.
Hence,
2,
lower
consumption
accessible.
