Case Studies in Thermal Engineering,
Год журнала:
2023,
Номер
53, С. 103784 - 103784
Опубликована: Ноя. 25, 2023
The
increasing
heating
demand
calls
for
a
correspondingly
augmented
capacity
of
the
primary
network.
However,
due
to
restriction
existing
pipes,
can
be
finitely
increased.
Therefore,
based
on
organic
Rankine
cycle
(ORC)
and
vapor
compression
(VCC),
novel
thermal
station
is
proposed
realize
self-augmented
capacity.
Based
laws
thermodynamics,
mathematical
model
constructed,
dynamic
performances
power
generation
are
analyzed.
Results
show
that
supply
water
temperature
network
greatly
influences
performance.
self-sufficient
electricity
achieve
approximately
2000
hours,
accounting
61.70%
period.
Additionally,
flexibly
reduce
return
20
°C,
thereby
achieving
rate
reach
53.56%.
demonstrates
excellent
capacity,
which
provides
new
path
satisfying
ever-increasing
demand.
Applied Sciences,
Год журнала:
2024,
Номер
14(2), С. 503 - 503
Опубликована: Янв. 5, 2024
Non-intrusive
load
monitoring
(NILM)
technology,
crucial
for
intelligent
electricity
management,
has
gained
considerable
attention
in
residential
usage
studies.
NILM
enables
of
total
electrical
current
and
voltage
homes,
offering
insights
vital
enhancing
safety
preventing
domestic
accidents.
Despite
its
importance,
accurately
discerning
the
operational
status
appliances
using
non-intrusive
methods
remains
a
challenging
area
within
this
field.
This
paper
presents
novel
methodology
that
integrates
an
advanced
clustering
algorithm
with
Bayesian
network
identification
appliance
states.
The
approach
involves
capturing
signals
during
operation
via
NILM,
followed
by
their
decomposition
into
odd
harmonics.
An
enhanced
is
then
employed
to
ascertain
central
coordinates
signal
clusters.
Building
upon
this,
three-layer
inference
model,
incorporating
leak
nodes,
developed.
Within
harmonic
are
used
as
conditions
node
activation.
states
subsequently
determined
through
probabilistic
reasoning.
proposed
method’s
effectiveness
validated
series
simulation
experiments
conducted
laboratory
environment.
results
these
(low
mode
89.1%,
medium
94.4%,
high
92.0%,
98.4%
combination)
provide
strong
evidence
accuracy
inferring
household
based
on
technology.
Energies,
Год журнала:
2024,
Номер
17(5), С. 1027 - 1027
Опубликована: Фев. 22, 2024
Cascade
high-temperature
heat
pumps
(CHTHPs)
are
often
applied
to
recover
low-temperature
industrial
waste
owing
their
large
temperature
lift.
Through
a
comprehensive
consideration
of
thermodynamic
and
economic
performance,
conventional
advanced
exergy
exergoeconomic
analyses
employed
in
this
study
evaluate
the
potential
for
improvement
CHTHP
systems.
The
results
show
that
avoidable
endogenous
destruction
system
accounts
62.26%
its
total
destruction,
indicating
most
comes
from
components.
This
suggests
systems
still
have
significant
improvement.
very
low
factor
(only
0.75%)
implies
cost
has
great
influence
on
performance
system.
high-
compressors
two
components
with
highest
accounting
34.14%
26.79%
system,
respectively.
Moreover,
is
much
larger
than
other
Thus,
priorities
should
be
compressors.
decrease
produces
reduction
carbon
emissions.
analysis
supplies
guidance
engineering
application
CHTHPs
recovery.
International Journal of Low-Carbon Technologies,
Год журнала:
2024,
Номер
19, С. 1013 - 1025
Опубликована: Янв. 1, 2024
Abstract
The
heat-source
tower
system
has
been
evaluated
in
an
enthalpy
difference
laboratory.
This
study
analyzes
the
seasonal
performance
under
various
operating
situations
and
fluid
quality.
In
summer
fall
seasons,
water
is
used
as
circulating
tower.
spring
winter
glycol
solution
fluid.
Some
parameters
of
(e.g.
temperature
inlet
outlet,
flow
rate
air
volume
moisture
content
air)
are
considered
measured
to
obtain
its
heat
transfer
characteristics.
simulation
model
constructed
based
on
mechanism
mass
transfer.
validated
by
experimental
results.
exchange
latent
analyzed
different
parameters,
well
variation
law
outlet
differences.
results
show
that
absorption
during
operation.
However,
for
every
9000
m3/h
increase
volume,
dilution
decreases
between
9
43%.
reduced
11–31%
1°C
addition
temperature.
Meanwhile,
dissipation
about
2.8
times
winter.
Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy,
Год журнала:
2024,
Номер
238(8), С. 1310 - 1320
Опубликована: Авг. 5, 2024
Refrigeration
technology
contributes
to
10∼15%
of
global
energy
consumption,
resulting
in
significant
carbon
emission.
Solar-driven
ejection-compression
refrigeration
system
is
promising
for
reducing
electricity
consumption
and
emissions.
However,
existing
solar
systems
suffer
from
drawbacks
low
heat
utilization
efficiency,
oversized
collectors,
thermal
leakage
due
large
temperature
differences
storage
devices.
Addressing
these
challenges,
this
study
proposes
investigates
a
new
solar-assisted
ejector-compressor
hybrid
with
subcooling
coupled
at
intermediate
temperatures.
The
model
established,
the
ejector
experimentally
validated.
Through
modelling,
an
energetic
exergetic
performance
comparative
analyses
are
conducted.
results
indicate
that
COP
proposed
9.7%
higher
than
traditional
combinations,
producing
same
cooling
capacity
generating
heat.
Moreover,
considering
stored
can
be
fully
converted
evaporating
temperatures,
h
reaches
8.29,
24.5%
systems.
15°C
0.325
entrainment
ratio
suggests
reduction
approximately
two-thirds
storage,
lower
differences,
reduced
leakage,
leading
decreased
space
economic
costs
improved
performance.
Additionally,
as
,
gh
η
ex
MCS
mode
consistently
outperform
those
ZCS
HCS
modes,
prioritized
operation.
This
underscores
offers
superior
overall
efficiency
requires
smaller
devices
compared
systems,
revealing
its
practical
applications.
Technical Education Science/Giáo dục Kỹ thuật,
Год журнала:
2024,
Номер
19(06), С. 56 - 65
Опубликована: Дек. 28, 2024
This
paper
investigates
the
integration
of
heat
pumps
for
heating
boiler
feedwater
and
evaluates
impacts
temperature
condensate
recovery
rates
on
fuel
consumption,
energy
efficiency,
CO2
emissions.
The
results
show
that
using
significantly
reduces
especially
when
increases
rate
is
high.
COP
(Coefficient
Performance)
pump
gradually
decreases
as
water
rises;
however,
at
lower
temperatures
yields
better
economic
efficiency.
Economically,
provide
substantial
benefits,
with
maximum
cost
savings
achieved
a
75°C.
Additionally,
integrating
emissions,
particularly
in
boilers
without
recovery,
highest
emission
reduction
reaching
17.8
kgCO2
per
ton
steam.
These
findings
demonstrate
not
only
energy-efficient
cost-effective
but
also
contributes
to
environmental
protection
by
reducing
greenhouse
gas
Case Studies in Thermal Engineering,
Год журнала:
2023,
Номер
53, С. 103784 - 103784
Опубликована: Ноя. 25, 2023
The
increasing
heating
demand
calls
for
a
correspondingly
augmented
capacity
of
the
primary
network.
However,
due
to
restriction
existing
pipes,
can
be
finitely
increased.
Therefore,
based
on
organic
Rankine
cycle
(ORC)
and
vapor
compression
(VCC),
novel
thermal
station
is
proposed
realize
self-augmented
capacity.
Based
laws
thermodynamics,
mathematical
model
constructed,
dynamic
performances
power
generation
are
analyzed.
Results
show
that
supply
water
temperature
network
greatly
influences
performance.
self-sufficient
electricity
achieve
approximately
2000
hours,
accounting
61.70%
period.
Additionally,
flexibly
reduce
return
20
°C,
thereby
achieving
rate
reach
53.56%.
demonstrates
excellent
capacity,
which
provides
new
path
satisfying
ever-increasing
demand.
