Durability of EGR Cooler performance is a key issue that affects the function of EGR system as anti-pollutant device. There is a significant concern to guarantee function of these devices during the useful life of the vehicle. Decrease of thermal efficiency and increase of gas pressure drop caused by soot deposition implies higher EGR gas temperature and lower EGR gas flow. Selection of the heat exchanger technology and definition of design parameters have an important effect on this degradation. Moreover the understanding of critical engine operation conditions enables to establish recommended use constraints. This paper reviews a compendium of different tests, where different technologies and sizes of EGR coolers have been exposed to different engine test cycles. It concludes with indications for EGR Cooler dimensioning and some considerations on use conditions. Experience with these tests show how EGR Cooler function should be reported and settle basis for future research projects.
Effects of soot deposition on EGR coolers: dependency on heat exchanger technology and engine conditions
2013
7 Seiten, 12 Bilder, 5 Tabellen, 8 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Englisch
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