Comprehensive assessment and analysis of cavitation scale effects on energy conversion and stability in pumped hydro energy storage units
Energy Conversion and Management,
Год журнала:
2024,
Номер
325, С. 119370 - 119370
Опубликована: Дек. 12, 2024
Язык: Английский
A prospective assessment of scale effects of energy conversion in ultra-low-head pumped hydro energy storage units
Energy Conversion and Management,
Год журнала:
2024,
Номер
315, С. 118798 - 118798
Опубликована: Июль 26, 2024
Язык: Английский
On the scale effect of energy conversion in large-scale bulb tubular pump: Characteristics, mechanisms and applications
Energy,
Год журнала:
2024,
Номер
292, С. 130528 - 130528
Опубликована: Фев. 6, 2024
Язык: Английский
Multi-scale leakage vortex interaction analysis in tip clearance of low-head pumped hydroelectric energy storage systems in pump mode
Journal of Energy Storage,
Год журнала:
2024,
Номер
101, С. 113821 - 113821
Опубликована: Окт. 5, 2024
Язык: Английский
Analysis of a contra-rotating pump–turbine for low-head applications: An experimental study and numerical comparison
Energy Conversion and Management,
Год журнала:
2025,
Номер
341, С. 119950 - 119950
Опубликована: Июнь 5, 2025
Язык: Английский
Performance Analysis and Optimization of Compressed Air Energy Storage Integrated with Latent Thermal Energy Storage
Energies,
Год журнала:
2024,
Номер
17(11), С. 2608 - 2608
Опубликована: Май 28, 2024
Recovering
compression
waste
heat
using
latent
thermal
energy
storage
(LTES)
is
a
promising
method
to
enhance
the
round-trip
efficiency
of
compressed
air
(CAES)
systems.
In
this
study,
systematic
thermodynamic
model
coupled
with
concentric
diffusion
transfer
cylindrical
packed-bed
LTES
established
for
CAES
system,
and
numerical
simulation
validated
by
experimental
data
in
reference.
Based
on
model,
charging–discharging
performance
systems
evaluated
under
different
layouts
phase
change
materials
(PCMs)
LTES,
optimal
layout
PCM
specified
as
three-stage
layout,
since
exergy
are
improved
8.2%
6.9%
compared
one-stage
layout.
Then,
proportion
three
PCMs
optimized
response
surface
methods.
The
optimization
results
indicate
that
system
expected
be
80.9%
73.3%
0.48:0.3:0.22
stages,
which
7.0%
13.1%
higher
than
original
equal
proportions.
Язык: Английский
Intensity recognition of vortex ropes in draft tube of a prototype pump turbine using an optimized CNN-BiLSTM framework with multi-head self-attention mechanism
Journal of Energy Storage,
Год журнала:
2024,
Номер
106, С. 114910 - 114910
Опубликована: Дек. 4, 2024
Язык: Английский
Gravity-induced virtual clocking effect in large-capacity/low-head pumped hydro energy storage system with horizontal shaft
Sustainable Energy Technologies and Assessments,
Год журнала:
2023,
Номер
60, С. 103441 - 103441
Опубликована: Сен. 6, 2023
Язык: Английский
Analysis of Stress Characteristics of a Vertical Centrifugal Pump Based on Fluid-Structure Interaction
Water,
Год журнала:
2023,
Номер
15(24), С. 4269 - 4269
Опубликована: Дек. 13, 2023
Vertical
centrifugal
pumps
play
a
crucial
role
in
numerous
water
conservancy
projects.
However,
their
continuous
operation
can
lead
to
the
development
of
cracks
or
even
fractures
some
pump
blades,
resulting
substantial
adverse
impact
on
pumping
station
unit
and
jeopardizing
safe
production.
This
study
employs
fluid-structure
interaction
method
comprehensively
investigate
modal
characteristics
impeller,
both
an
air
environment
immersed
water.
Furthermore,
analysis
static
dynamic
stress
attributes
is
conducted.
The
natural
frequency
impeller
when
submerged
significantly
lower
than
its
medium,
typically
accounting
for
approximately
0.35
0.46
air-based
frequency.
There
are
conspicuous
concentrations
at
specific
locations
within
system,
specifically
rounded
corners
blade
back
exit
edge,
front
cover,
middle
inlet
junction
where
interfaces
with
cover.
It
underscore
that
system
operates
under
high-flow
low-flow
conditions,
there
pronounced
concentration
interface
between
rear
cover
plate.
Any
deviation
from
intended
design
conditions
results
escalation
equivalent
levels.
Through
calculations
during
single
rotational
cycle
it
discerned
cyclic
nature
point
maximum
primarily
influenced
by
number
blades
velocity
impeller.
research
carries
significant
implications
effectively
mitigating
fatigue
damage,
thereby
enhancing
operational
reliability
vertical
applications.
Язык: Английский
Comparative study on stator corner separation vortex characteristics in axial-flow pump and tubular pump: To understand the effects of guide-vane cone diffusion on horn-like vortices
Journal of Physics Conference Series,
Год журнала:
2024,
Номер
2707(1), С. 012022 - 012022
Опубликована: Фев. 1, 2024
Abstract
The
guide-vane
cone
diffusion
is
a
typical
structural
difference
between
an
axial-flow
pump
and
tubular
pump,
which
shown
as
low
diffusivity
high
respectively,
but
it
still
unclear
how
this
affects
the
vortex
characteristics
in
stator
corner
separation
flows.
In
paper,
comparative
study
of
flows
was
conducted,
effects
on
vortical
structures
were
clarified.
Firstly,
for
apparent
features,
compared
with
diffusivity,
horn-like
has
features
smaller
scale,
weaker
swirling
strength,
shorter
evolution
cycle
lower
pressure
fluctuations.
Secondly,
dynamics
mechanism,
can
cause
additional
energy
recovery,
leads
to
higher
adverse
gradients,
so
easier
induce
shroud
backflow
near
suction
surface.
coupled
flow
field
main
flow,
namely
hub
backflow,
streamwise
periodic
oscillation
function
gradient
ω
S
·▽(▽
p/ρ
)
found,
induces
unique
vortex-street-like
distributions
deformational
vorticity
rigid
R
.
This
physical
effect
causes
mutual
competition
opposite
side.
It
originating
from
that
greatly
suppresses
development
pump.
Язык: Английский