Abstract:
During the EGR cooler performance is a key issue that a ects the function
of EGR system as an anti-pollutant device. There is a signi cant concern
to guarantee function of these devices during useful life of vehicle. Decrease
of thermal e ciency and increase of gas pressure drop caused by soot
deposition implies higher EGR gas temperature and lower EGR gas
ow.
Diesel engines are important power train solution for heavy duty vehicles
and diesel power plants. Hence in this study theoretical analysis and CFD
simulation of EGR cooler is carried out for improved emission and high heat
recovery from engine exhaust. Use of the Cooled Exhaust Gas Recirculation
(EGR) system is one of the most e ective techniques currently available for
reducing NOx and PM emissions. It was observed that there is good
agreement between experimental results and prediction from the
development model. An important goal in diesel engine research is the
development of a means to reduce the emissions of nitrogen oxides (NOx).
The use of a cooled exhaust gas recirculation (EGR) system is one of the
most e ective techniques currently available for reducing nitrogen oxides.
Since PM (Particulate Matter) fouling reduces the e ciency of an EGR
cooler, a tradeo exists between the amount of NOx and PM emissions,
especially at high engine loads. In the present study, we performed engine
dynamometer experiments and numerical analyses to investigate how the
internal shape of an EGR cooler a ects the heat exchanger e ciency. Heat
exchanger e ciencies were examined for corrugated EGR coolers. The
temperature and pressure distributions inside these EGR coolers were
obtained in three dimensions using the numerical package program ANSYS.
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