Evaluation of SOF Effects on Deposit Characteristics of the EGR Cooler Using a PM Generator

2011-01-1156

04/12/2011

Event
SAE 2011 World Congress & Exhibition
Authors Abstract
Content
The high concentration of particulate matter (PM) in diesel exhaust gas causes significant soot deposition on the wall of EGR cooler, and reduces the heat transfer performance of the EGR cooler and the reduction rate of NOx. The deposition of PM tends to be occurred more severely with "heavy wet PM," which is more frequently at the LTC (low temperature combustion) engine.
The objective of this work is to evaluate the effects of soluble organic fraction (SOF) on deposit characteristics of the EGR cooler. To measure reliable mean particle concentration values and surrogate SOFs, the soot generator with SOF vaporizer was used.
As for two surrogate SOFs, n-dodecane and diesel lube oil, deposit mass increased when they were injected. Especially from the experiment results, it was found that the lube oil effect was more significant than the n-dodecane effect and lube oil also had a stronger effect on reduction of thermal conductivity by filling pores in deposits. In detail, when diesel lube oil was injected, the deposit mass per unit area increased 121% compared to dry soot without injection at the coolant temperature of 40°C. In contrast, effectiveness-drop after 10 hours increased just by 11%.
Meta TagsDetails
DOI
https://doi.org/10.4271/2011-01-1156
Pages
9
Citation
Lee, Y., Hong, K., Song, S., Chun, K. et al., "Evaluation of SOF Effects on Deposit Characteristics of the EGR Cooler Using a PM Generator," SAE Technical Paper 2011-01-1156, 2011, https://doi.org/10.4271/2011-01-1156.
Additional Details
Publisher
Published
Apr 12, 2011
Product Code
2011-01-1156
Content Type
Technical Paper
Language
English