This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Direct Measurement of EGR Cooler Deposit Thermal Properties for Improved Understanding of Cooler Fouling
Technical Paper
2009-01-1461
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Exhaust gas recirculation (EGR) cooler fouling has become a significant issue for compliance with NOx emissions standards. This paper reports results of a study of fundamental aspects of EGR cooler fouling. An apparatus and procedure were developed to allow surrogate EGR cooler tubes to be exposed to diesel engine exhaust under controlled conditions. The resulting fouled tubes were removed and analyzed. Volatile and non-volatile deposit mass was measured for each tube. Thermal diffusivity of the deposited soot cake was measured by milling a window into the tube and using the Xenon flash lamp method. The heat capacity of the deposit was measured at temperatures up to 430°C and was slightly higher than graphite, presumably due to the presence of hydrocarbons. These measurements were combined to allow calculation of the deposit thermal conductivity, which was determined to be 0.041 W/mK, only ∼1.5 times that of air and much lower than the 304 stainless steel tube (14.7 W/mK). The main determinant of the deposit thermal conductivity is density, which was measured to be just 2% that of the density of the primary soot particles (or 98% porous). The deposit layer thermal resistance was calculated and compared with estimates of the thermal resistance calculated from gas temperature data during the experiment. The deposit properties were also used to further analyze the temperature data collected during the experiment.
Recommended Content
| Journal Article | Diesel EGR Cooler Fouling |
| Technical Paper | Physicochemical Characteristics of Soot Deposits in EGR Coolers |
| Technical Paper | Numerical Modeling and Experimental Investigations of EGR Cooler Fouling in a Diesel Engine |
Authors
Topic
Citation
Lance, M., Sluder, C., Wang, H., and Storey, J., "Direct Measurement of EGR Cooler Deposit Thermal Properties for Improved Understanding of Cooler Fouling," SAE Technical Paper 2009-01-1461, 2009, https://doi.org/10.4271/2009-01-1461.Also In
References
- Dickey D. W. Ryan T. Matheaus A. C. “NO x Control in Heavy-Duty Diesel Engines—What is the limit?” SAE Paper Number 980174 SAE International 1998
- Ishikawa N. Ohkubo Y. Kudou K. “Study on the Effects of EGR Cooler Performance on Combustion Properties of the Pre-Mixed Compression Ignition Combustion by Multi Cylinder DI Diesel Engine,” SAE Paper 2007-01-1881 SAE International 2007
- Pickett L. M. Siebers D. L. “Non-Sooting, Low Flame Temperature Mixing-Controlled DI Diesel Combustion,” SAE Paper Number 2004-01-1399 SAE International 2004
- Idicheria C. A. Pickett L. M. “Soot Formation in Diesel Combustion under High-EGR Conditions,” SAE Paper Number 2005-01-3834 SAE International 2005
- Sluder C. S. Wagner R. M. “An Estimate of Diesel High-Efficiency Clean Combustion Impacts on FTP-75 Aftertreatment Requirements,” SAE Paper Number 2006-01-3311 SAE International 2006
- Lepperhoff G. Houben M. “Mechanisms of Deposit Formation in Internal Combustion Engines and Heat Exchangers,” SAE Paper Number 931032 Society of Automotive Engineers 1993
- Zhang R. Charles F. Ewing D. Chang J. S. Cotton J. S. “Effect of Diesel Soot Deposition on the Performance of Exhaust Gas Recirculation Cooling Devices,” SAE Paper Number 2004-01-0122 SAE International 2004
- Hoard J. W. Abarham M. Styles D. Giuliano J. M. Sluder C. S. Storey J. M. E. “Diesel EGR Cooler Fouling,” SAE Paper Number 2008-01-2475 SAE International 2008
- Sluder C. S. Storey J. M. E. Styles D. Giuliano J. Hoard J. W. “Hydrocarbons and Particulate Matter in EGR Cooler Deposits: Effects of Gas Flow Rate, Coolant Temperature, and Oxidation Catalyst,” SAE Paper Number 2008-01-2467 SAE International 2008
- Sluder C. S. Storey J. M. E. “EGR Cooler Performance and Degradation: Effects of Biodiesel Blends,” SAE Paper Number 2008-01-2473 SAE International 2008
- Bravo Y. Lazaro J. L. Garcia-Bernad J. “Study of Fouling Phenomena on EGR Coolers due to Soot Deposits: Development of a Representative Test Method,” SAE Paper Number 2005-01-1143 SAE International 2005
- Bravo Y. Moreno F. Longo O. “Improved Characterization of Fouling in Cooled EGR Systems,” SAE Paper Number 2007-01-1257 SAE International 2007
- Grillot J. M. Icart G. “Fouling of a Cylindrical Probe and a Finned Tube Bundle in a Diesel Exhaust Environment,” Experimental Thermal and Fluid Science 1997 14 442 454 Elsevier Science, Inc. 1997
- Ismail B. Charles F. Ewing D. Cotton J. S. Chang J-S “Mitigation of the Diesel Soot Deposition Effect on the Exhaust Gas Recirculation (EGR) Cooling Devices for Diesel Engines” SAE Paper Number 2005-01-0656 SAE International 2005
- Ismail B. Ewing D. Cotton J. S. Chang J-S. “Characterization of the Soot Deposition Profiles in Diesel Engine Exhaust Gas Recirculation (EGR) Cooling Devices using a Digital Neutron Radiography Imaging Technique,” SAE Paper Number 2004-01-1433 SAE International 2004
- Charles F. Ewing D. Becard J. Chang J-S. Cotton J. S. “Optimization of the Exhaust Mass Flow Rate and Coolant Temperature for Exhaust Gas Recirculation (EGR) Cooling Devices Used in Diesel Engines,” SAE Paper Number 2005-01-0654 SAE International 2005
- Usui S. Ito K. Kato K. “The Effect of Semi-Circular Micro Riblets on the Deposition of Diesel Exhaust Particulate,” SAE Paper Number 2004-01-0969 SAE International 2004
- Castano C. Sanchez A. Grande J. A. Paz C. “Advantages in the EGR Cooler Performance by Using Internal Corrugated Tubes Technology,” SAE Paper Number 2007-26-019 SAE International 2007
- Park K. Kittelson D. B. Zachariah M. R. McMurry P. H. “Measurement of inherent material density of nanoparticle agglomerates,” Journal of Nanoparticle Research 6 267 272 2004
- Incropera Frank P. Dewitt David P. Fundamentals of Heat and Mass Transfer 3rd Edition John Wiley & Sons 1990