Naukovij žurnal «Tehnìka ta energetika»,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 29, 2024
The
relevance
of
the
study
is
to
develop
an
effective
system
for
controlling
pressure
in
air
supply
motorised
breathing
apparatus
ensure
protection
employees
from
dangerous
aerosols
and
improve
their
health.The
goal
was
create
automated
control
a
using
proportional-integral-derivative
controller.For
this
purpose,
simulation
method
used.In
order
avoid
unforeseen
situations
deterioration
level
protection,
structure
respirator
has
been
developed
with
selection
appropriate
controller
based
on
obtained
dependences
influence
parameters
mode
amount
under-mask
space
respirator,
which
ensures
comfortable
operation.This
allowed
developing
model
PID
that
would
provide
values
within
permissible
limits
(50-370
Pa).It
proved
maintains
mask
certain
both
increase
decrease
signal,
preventing
excessive
fluctuations
variable,
leads
extension
service
life
filter
elements
reduction
electricity
consumption
operation
fan
motor.Based
modelling
different
modes
operation,
it
shown
when
defined
parameters,
provides
compensation
changes
Energies,
Journal Year:
2024,
Volume and Issue:
17(5), P. 1213 - 1213
Published: March 3, 2024
The
relentless
advancement
of
digital
technologies
has
the
potential
to
significantly
reshape
energy
landscape
as
become
increasingly
integrated
into
diverse
sectors
economy.
This
study
explores
intricate
relationship
between
digitalization
and
in
EU
countries,
focusing
on
its
direct
indirect
impacts
consumption,
structure,
intensity.
Furthermore,
this
mediating
mechanisms
that
facilitate
these
changes,
including
role
technological
innovation
government
efficiency
outcomes.
Focusing
countries
using
system-GMM
method,
research
accounts
for
heterogeneity
impact
across
various
member
states.
It
examines
varying
effects
different
considering
their
income
levels,
environmental
regulations,
green
investments.
results
demonstrate
strategic
deployment
substantially
benefits
sector.
By
optimizing
consumption
enhancing
structure
through
integration
renewable
sources,
could
move
closer
sustainability
objectives.
International Journal of Energy Research,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
This
study
examines
the
impact
of
different
circular
shell
and
tube
heat
exchanger
configurations
on
system
charging
time.
Various
will
be
evaluated,
namely
A,
B,
C,
D,
with
1,
2,
3,
4
tubes,
respectively.
The
contains
a
phase
change
material
(N‐eicosane),
location
tubes
changes
in
each
configuration,
forming
new
case.
A
total
38
numerical
experiments
were
conducted
using
commercial
software
to
investigate
various
locations
arrangements.
While
previous
studies
have
primarily
focused
time
as
fitness
measure
for
configurations,
this
considers
need
achieve
high
levels
within
limited
windows.
Therefore,
configuration
that
takes
longer
charge
completely
may
shorter
reach
90%
charging,
making
it
more
reliable.
top
assessed
gold,
silver,
bronze
rankings
based
their
agility
milestones
(at
every
level
50%,
80%,
charging).
For
instance,
case
C6
achieved
golden
ranking
reaching
full
about
328
seconds,
12.5%
faster
(41
seconds)
than
efficient
(C5)
minimum
However,
has
516
seconds
(about
20%
extra
time).
On
other
hand,
C5
also
fastest
at
50%
80%
which
shows
responds
thermal
source
very
rapidly.
results
demonstrate
increasing
significantly
decreases
melting
type
D7,
only
one‐fifth
(80%
improvement)
compared
base
case,
A1.
Finally,
performance
cases
during
discharge
process
is
evaluated.
Applied Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
250, P. 123494 - 123494
Published: May 25, 2024
This
study
numerically
investigates
the
influence
of
variable
gravity
on
melting
behaviour
a
phase
change
material
(PCM-
paraffin
wax
RT27)
contained
within
an
enclosed
vertical
channel
under
different
conditions,
specifically
those
found
Earth,
Moon,
and
microgravity
environments.
Furthermore,
impacts
incorporating
various
number
helical
fins
PCM
unit
gravitational
conditions
are
assessed
for
first
time.
The
findings
indicate
that
efficiency
is
considerably
affected
by
reduced
due
to
changes
in
natural
convection,
velocity,
temperature;
time
twice
as
long
moon-gravity
sixfold
longer
compared
earth-gravity.
It
also
observed
can
be
remedied
insertion
into
unit.
breakdown
convection
vortices
with
orientation
expedites
process
all
thus
leading
improved
performance
energy
storage.
Applied Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
246, P. 122923 - 122923
Published: March 11, 2024
The
principal
strategy
for
achieving
a
neutral
climate
entails
enhancing
the
share
of
renewable
energies
in
energy
mix,
conjunction
with
promoting
innovation
efficient
technologies.
Thermal
storage
systems
have
potential
to
efficiently
handle
intermittent
nature
sources.
Furthermore,
these
can
effectively
shifts
both
heat
and
electrical
demand.
Thus,
power-to-heat
technologies
are
needed
boost
thermal
storage.
This
manuscript
explores
utilising
thermoelectric
pump
system
electric
resistances
charging
In
order
achieve
elevated
temperatures,
integrates
blocks
two-stage
configuration.
Air
has
been
employed
as
transfer
medium
sensible
Higher
airflow
rates
improve
performance
system.
Moreover,
its
impact
on
optimal
voltage
supply
is
observed
when
it
combined
an
resistance
temperatures.
comparison
basic
process
that
solely
relies
at
120
°C,
significant
30
%
increase
conversion
achieved
by
including
fact,
elevates
temperature
from
initial
ambient
25
°C
remarkable
113.1
coefficient
1.35
rate
23
m3/h.
Therefore,
use
this
technology
enhance
complete
storing
excess
form
subsequent
electricity
through
power
cycle
demonstrated.
