EGR Cooler Fouling
From autolab
Contents |
[edit] Researchers
- Dennis Assanis
- John Hoard
- Mehdi Abarham
- Amit Goje
[edit] Sponsors
- Ford Motor Company
- Ford Motor Company Canada
[edit] Abstract
Diesel and gasoline engines use cooled exhaust gas recirculation (EGR) to reduce emissions. Diesel engines in particular used cooled EGR to reduce nitrogen oxides (NOx) with little or no particulate matter (PM) and fuel economy penalty.
EGR coolers are heat exchangers that cool exhaust with engine coolant. During operation, deposits consisting of soot, hydrocarbon (HC), and acids can build up. These deposits degrade cooler effectiveness and increase pressure drop. The result is increased emissions, lost fuel efficiency, and higher engine cost.
Models of the fouling phenomena are being developed in cooperation with our research partners. The research has identified fundamental parameters such as deposit layer thermal properties that are not known; experiments are being developed to measure these properties.
[edit] Goals
- Improved understanding of EGR cooler fouling phenomena.
- From this understanding, design concepts to minimize fouling.
[edit] Achievements
A fouling model describes fouling, effectiveness drop, and mass gain for a simple tube geometry in good agreement with experimental data.
A test stand has been designed to make detailed studies of deposit formation, growth, and removal mechanisms.
