Evaluation of SOF effects on deposit characteristics of the EGR cooler using a PM generator

Youngbok Lee, Kwang Seok Hong, Soonho Song, Kwang Min Chun, Kyo Seung Lee, Sunki Min, Doyoung Chung

Research output: Contribution to conferencePaperpeer-review

Abstract

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 10hours increased just by 11%.

Original languageEnglish
Publication statusPublished - 2011 Dec 1
EventSAE 2011 World Congress and Exhibition - Detroit, MI, United States
Duration: 2011 Apr 122011 Apr 14

Other

OtherSAE 2011 World Congress and Exhibition
CountryUnited States
CityDetroit, MI
Period11/4/1211/4/14

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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