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Heat
Exchangers
Redesigning the
Heat Exchanger
of an Electric
Motor Using CFD
Simulation.
This project was
performed in
2013 with the
aim of
optimizing the
heat exchanger
of a 2MW three
phase induction
electric motor
of Hitachi
Company for full
load operation
during summer.
In this project
the geometrical
characteristics
such as the size
of the rotor,
stator, inner
ducts and the
cold and hot
streams of the
heat exchanger
were extracted.
After creating a
complete
geometric model
of the engine
and a very
complex 34
million mesh
generation,
fluid and heat
analysis inside
the electric
motor and the
heat exchanger
with the use of
high-speed
computers was
performed.
After the
specification of
temperature
distribution in
electric motor
and heat
exchanger, the
heat exchanger
with the aim of
modifying the
cooling system
was optimized.
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Optimization of
a 1960 Tubes
Compact Air to
Air C-130
Airplane Heat
Exchanger Using CFD Simulation.
This project was
performed in
2006 with the
aim of
optimization and
modification of
the heat
exchanger. This
heat exchanger
is used for
cabin
ventilation of
C-130 airplane.
The hot
compressed air
in engine is
cooled by the
cold fresh air
at high
altitudes in a
four pass heat
exchanger.
With
mathematical
analyses and CFD
simulations,
optimization for
improving the
thermal
efficiency of
the heat
exchanger was
achieved.
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Inlet
Manifold
Optimization of
a 1800 Tubes
Compact Air to
Air C-130
Airplane Heat
Exchanger Using CFD Simulation.
This project was
performed in
2006 with the
aim of inlet
manifold
optimization to
fix the problem
of flow
maldistribution
and hot spot
reduction. This
heat exchanger
is used for
cargo
ventilation of
C-130 airplane.
The hot
compressed air
in the engine is
cooled by the
cold fresh air
at high
altitudes in a
two pass heat
exchanger.
The destruction
of connections
between intake
manifold and
tubes because of
the hot spots,
caused the
leakage and
problem in
cooling and
adjusting the
pressure at high
altitudes inside
the cargo
compartment.
Using CFD
simulations, new
manifold with
uniform flow and
temperature
distribution,
higher thermal
efficiency and
longer life was
designed.
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Shell and
Tube Heat
Exchanger
Optimization
Using CFD
Simulation.
This
investigation
has been started
in Arya Alborz
Company since
2008 with the
aim of shell and
tube heat
exchangers
optimization. In
this project
comprehensive
studies on the
shell and tube
heat exchangers
were performed
to identify
various
optimization
techniques of j
factor and f
factor. After
the study of
segmental baffle
shell and tube
heat exchangers,
optimization
with the use of
Helical baffle
design (Helixchangers)
for higher
thermal
efficiency and
fouling
reduction was
developed. Based
on comprehensive
CFD simulations,
lower pressure
drop can lead to
design a heat
exchanger with
higher thermal
efficiency. Also
reduction in
fouling and two
or three times
life extension
with higher
thermal
efficiency are
the benefits of
Helixchangers
compared to
segmental baffle
shell and tube
heat exchangers.
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