The Effect of Cooling Efficiency on Fouling by EGR Cooler Internal Shape

EGR Cooler 내부 형상에 따른 Fouling이 냉각 성능에 미치는 영향

  • 남연우 (단국대학교 기계공학과) ;
  • 오광철 (자동차부품연구원 환경에너지시스템연구센터) ;
  • 이천환 (자동차부품연구원 환경에너지시스템연구센터) ;
  • 이춘범 (자동차부품연구원 환경에너지시스템연구센터) ;
  • 이원남 (단국대학교 기계공학과)
  • Received : 2010.03.22
  • Accepted : 2010.07.19
  • Published : 2011.01.01

Abstract

Understanding the exhaust gas recirculation (EGR) cooler fouling in diesel engine is important factor in the durability characteristic of a EGR system. We develope a test rig and PM feeder using carbon black to examine the effect of fouling on EGR cooler devices those were consisted of flat and shell & tube type. The EGR cooler fouling process is a complex interaction involving heat exchanger shape, boundary condition, constitutes, chemistry and operating mode. As the soot deposited to EGR cooler, these formed a thin deposit layer that was less heat exchange than the fresh status of tube enclosing the exhaust gas, resulting in lower heat exchange effectiveness in both type coolers. But these deposits caused different results in pressure drop, it is increased in flat type, but decreased in Shell & tube type of EGR cooler. A cause was estimated from a change of the flow structure and a decrease of contact area as the EGR cooler fouling.

Acknowledgement

Grant : Euro-6대응 차세대 EGR/후처리 복합시스템 특성 및 적합성 평가

Supported by : 지식경제부

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