Mitigation of the Diesel Soot Deposition Effect on the Exhaust Gas Recirculation (EGR) Cooling Devices for Diesel Engines

Ismail, Basel I.; Charles, F.; Ewing, D.; Cotton, James; Chang, Jen‐Shih

doi:10.4271/2005-01-0656

Cited by 20 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many experimental studies of particle deposition and hydrocarbon condensation in EGR coolers including effectiveness reduction and pressure drop increase due to fouling (Sluder et al, 2008;Chang et al, 2010;Abd-Elhady et al, 2009;Ismail et al, 2005) or ex-situ measurements of the deposit thermal properties after the layer was exposed to the ambient and the sample was cut (Lance et al, 2010;Lance et al, 2009). Despite the very good quality of these studies, the dynamics of the fouling process is not clear from them.…”

Section: Introductionmentioning

confidence: 98%

In-situ visualization of exhaust soot particle deposition and removal in channel flows

Abarham¹,

Chafekar²,

Hoard³

et al. 2013

Chemical Engineering Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

In-situ visualization of exhaust soot particle deposition and removal in channel flows

Abarham¹,

Chafekar²,

Hoard³

et al. 2013

Chemical Engineering Science

View full text Add to dashboard Cite

“…Lepperhoff and Houben [1] described the fouling effect on heat exchangers and early EGR coolers. Others have developed methods for assessing fouling and metrics for performance degradation in EGR coolers [2][3][4], and Abd-Elhady et al [5] recently reviewed the literature on automotive EGR cooler fouling and detailed areas of research that were needed.…”

Section: Introductionmentioning

confidence: 99%

Exhaust Gas Recirculation Cooler Fouling in Diesel Applications: Fundamental Studies of Deposit Properties and Microstructure

Storey¹,

Sluder²,

Lance³

et al. 2013

Heat Transfer Engineering

View full text Add to dashboard Cite

Ford Motor Company, Dearborn, Michigan, USAThis article reports on the results of experimental efforts aimed at improving the understanding of the mechanisms and conditions at play in the fouling of exhaust gas recirculation coolers. An experimental apparatus was constructed to utilize simplified surrogate heat exchanger tubes in lieu of full-size heat exchangers. The use of these surrogate tubes allowed removal of the tubes after exposure to engine exhaust for study of the deposit layer and its properties. The exhaust used for fouling the surrogate tubes was produced using a modern medium-duty diesel engine fueled with both ultra-low-sulfur diesel and biodiesel blends. At long exposure times, no significant difference in the fouling rate was observed between fuel types and hydrocarbons levels. Surface coatings for the tubes were also evaluated to determine their impact on deposit growth. No surface treatment or coating produced a reduction in the fouling rate or any evidence of deposit removal. In addition, microstructural analysis of the fouling layers was performed using optical and electron microscopy in order to better understand the deposition mechanism. The experimental results are consistent with thermophoretic deposition for deposit formation, and van der Waals attraction between the deposit surface and exhaust-borne particulate.

show abstract

“…Ismail et al (Ismail et al, 2005) suggested that short twisted-tape inserts could be added to improve some current designs of cooling devices. Usui (2004) also experimentally demonstrated that deposition can be reduced by as much as 38% with proper riblet dimensions as compared to flat and smooth designs.…”

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.

View full text Add to dashboard Cite

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%.

show abstract

Mitigation of the Diesel Soot Deposition Effect on the Exhaust Gas Recirculation (EGR) Cooling Devices for Diesel Engines

Cited by 20 publications

References 8 publications

In-situ visualization of exhaust soot particle deposition and removal in channel flows

In-situ visualization of exhaust soot particle deposition and removal in channel flows

Exhaust Gas Recirculation Cooler Fouling in Diesel Applications: Fundamental Studies of Deposit Properties and Microstructure

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

Contact Info

Product

Resources

About