Diesel EGR Cooler Fouling

Hoard, John; Abarham, Mehdi; Styles, Dan; Giuliano, Julia; Sluder, C. Scott; Storey, John

doi:10.4271/2008-01-2475

Cited by 76 publications

(31 citation statements)

References 18 publications

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“…Deposition of particulate matter on the walls of the EGR cooler leads to formation of a fouling layer [2]. The fouling of EGR coolers results in significant deterioration of the cooler effectiveness and increased pressure drop across the cooler.…”

Section: Introductionmentioning

confidence: 99%

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Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Warey

Bika

Long

et al. 2013

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

“…This includes the polycyclic aromatic hydrocarbons (PAH) and partially oxidized products such as aldehydes and alcohols. The sulfate content of PM is derived from sulfur in the fuel and lubricating oil [1,2].…”

Section: Introductionmentioning

confidence: 99%

Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Warey

Bika

Long

et al. 2013

International Journal of Heat and Mass Transfer

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“…Consequently, the deterioration in cooler performance due to fouling has an adverse effect on the rate of NOx reduction (Hoard et al, 2008;Zhang and Nieuwstadt, 2008).…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of SOF effects on EGR cooler fouling under various flow conditions

Hong¹,

Park

Lee

2011

Int.J Automot. Technol.

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An experiment was conducted to characterize the effects of SOF on EGR cooler fouling. A removable singletube test rig combined with a soot generator was developed to represent an EGR cooler and diesel exhaust gas. The use of a soot generator, which controlled the size and concentration of soot particles, enabled independent variables to be completely controlled. Either n-dodecane or diesel lube oil as substitute SOFs were vaporized and injected into the test rig to evaluate their effects on the growth of PM deposits and the degradation performance of the EGR cooler. Coolant temperature, which seemed to be associated with SOF content, was chosen as an independent variable, and PM deposit mass per unit area and the effectiveness drop versus time increased as the coolant temperature decreased. The PM deposit mass per unit area and effectiveness drop had maximum values at a coolant temperature of 40 o C for every n-dodecane injection rate. For substitute SOFs tested in this experiment, the deposit mass increased when either n-dodecane or diesel lube oil was injected, but the effect of lube oil was more significant. Diesel lube oil seemed to have a stronger effect on the reduction of thermal conductivity by filling pores in the deposits. When diesel lube oil was injected, the deposit mass per unit area increased 127% compared to dry soot without injection. The effectiveness drop after 10 hours increased only 12.5%.

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“…Larger particles are then trapped by inertial impaction. The fouling layer has been reported to have asymptotic behavior for EGR Coolers after some time [5,6].…”

Section: Fouling In Egr Coolersmentioning

confidence: 99%

Characterization of EGR Cooler Response for a Range of Engine Conditions

Bravo

Luján

Tiseira

2013

SAE Int. J. Engines

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Fouling phenomenon is a key issue for EGR cooler operation. In spite of the fact that soot deposition is imposed by the characteristics of the exhaust gases flow, the design of the EGR cooler has a significant impact for effect on the engine. New combustion modes corresponding to new engine developments and combination of EGR system with other post-treatment devices make that fouling conditions for future generations of EGR coolers can be significantly different from previous applications from Euro 3 to Euro 5. An investigation has been performed in order to characterize the response of different EGR coolers designs for different conditions of the exhaust gases. As for the design, the technology selected has been tube-and-fin heat exchanger, which is a high performance technology that fits Euro 6 customer specifications. The variations in design have been made through modifications in fin characteristics, both in configuration and geometric dimensions. As for engine operation conditions, the exhaust gases characteristics have been modified from a standard calibration to get more severe fouling conditions, in terms of HC content, opacity, exhaust gas temperature and flow. The degradation of performance has been characterized through measurements of thermal efficiency and permeability. It can be concluded that HC content and opacity have a significant influence on fouling phenomena, and that EGR cooler optimum design is highly dependent on these exhaust gas conditions.

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Diesel EGR Cooler Fouling

Cited by 76 publications

References 18 publications

Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Influence of water vapor condensation on exhaust gas recirculation cooler fouling

Experimental evaluation of SOF effects on EGR cooler fouling under various flow conditions

Characterization of EGR Cooler Response for a Range of Engine Conditions

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