SAE technical papers on CD-ROM/SAE technical paper series,
Год журнала:
2025,
Номер
1
Опубликована: Янв. 31, 2025
<div
class="section
abstract"><div
class="htmlview
paragraph">The
thermoelectric
generator
system
is
regarded
as
an
advanced
technology
for
recovering
waste
heat
from
automotive
exhaust.
To
address
the
issue
of
uneven
temperature
distribution
within
exchanger
that
limits
output
performance
system,
this
study
designs
a
novel
generation
integrated
with
turbulence
enhancers.
This
configuration
aims
to
enhance
convective
transfer
at
rear
end
and
improve
overall
uniformity.
A
multiphysics
coupled
model
established
evaluate
impact
enhancers
on
system's
electrical
output,
comparing
its
traditional
systems.
The
findings
indicate
integration
significantly
increases
rate
uniformity
exchanger.
However,
it
also
leads
increase
in
exhaust
back
pressure,
which
negatively
affects
performance.
At
lower
flow
velocities,
gains
power
attributable
considerably
outweigh
pressure.
Specifically,
under
conditions
550
K
20
m/s,
power,
net
coefficient
by
39.2%,
33.6%,
8.5%,
respectively.
As
rises,
become
even
more
pronounced.
Nevertheless,
high
conditions,
rise
pressure
can
potentially
degrade
Therefore,
recommended
be
appropriately
diverted
practical
applications
ensure
optimal
research
provides
essential
theoretical
guidance
design
optimization
systems.</div></div>
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Abstract
The
intertwining
between
thermal
and
electrical
transport
poses
significant
challenges
to
enhancing
thermoelectric
performance.
Chemical
doping
with
a
single
element
often
can
optimize
one
of
the
parameters
yet
may
deteriorate
others,
restricting
upper
limit
ZT
achievable.
Multi‐element
address
this
interdependence,
allowing
for
simultaneous
optimization
properties.
However,
clear
selection
rule
multiple
dopants
remains
unclear.
Here,
stepwise
strategy
is
shown
improve
performance
metavalently
bonded
GeTe
by
density‐of‐states
effective
mass,
increasing
carrier
mobility,
reducing
conductivity.
These
effects
are
realized
continuously
introducing
band
convergence,
lattice
plainification,
structural
defects.
Specifically,
convergence
achieved
Cd
reduce
energy
offset
light
heavy
bands.
plainification
enabled
filling
Ge
vacancies
Cu,
which
improves
mobility.
Lastly,
conductivity
reduced
via
phonon
scattering
point
defects
caused
Pb
nanoprecipitates
associated
all
these
dopants.
Consequently,
peak
2.2
at
773
K
an
average
ave
1.27
within
300–773
in
0.86
0.1
0.04
Te‐2%Cu
2
Te.
This
work
provides
synergistic
modulate
electron
materials.
