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Thermal Performance of Diesel Aftertreatment: Material and Insulation CFD Analysis
Technical Paper
2014-01-2818
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Recent developments in diesel engines lead to increased fuel efficiency and reduced exhaust gas temperature. Therefore more energy efficient aftertreatment systems are required to comply with tight emission regulations. In this study, a computational fluid dynamics package was used to investigate the thermal behaviour of a diesel aftertreatment system. A parametric study was carried out to identify the most influential pipework material and insulation characteristics in terms of thermal performance. In the case of the aftertreatment pipework and canning material effect, an array of different potential materials was selected and their effects on the emission conversion efficiency of a Diesel Oxidation Catalyst (DOC) were numerically investigated over a driving cycle. Results indicate that although the pipework material's volumetric heat capacity was decreased by a factor of four, the total emission reduction was only considerable during the cold start.
Different insulation strategies (e.g. double layer pipe with air gap and vacuum) were simulated using CFD and the improvement in the DOC emission conversion was monitored over the New European Driving Cycle (NEDC). It was found that insulation strategies can considerably improve the aftertreatment performance particularly during engine high-load conditions. To improve the cold-start performance a new aftertreatment pipework design was developed and simulated to examine its performance in terms of thermal behaviour during different engine operating conditions. This design introduces a well-insulated pipework system with minimized thermal inertia to accelerate the aftertreatment catalyst light-off.
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Hamedi, M., Tsolakis, A., and Herreros, J., "Thermal Performance of Diesel Aftertreatment: Material and Insulation CFD Analysis," SAE Technical Paper 2014-01-2818, 2014, https://doi.org/10.4271/2014-01-2818.Also In
References
- Johnson , T. Diesel Emissions in Review SAE Int. J. Engines 4 1 143 157 2011 10.4271/2011-01-0304
- Kim , C. , Paratore , M. , Gonze , E. , Solbrig , C. et al. Electrically Heated Catalysts for Cold-Start Emissions in Diesel Aftertreatment SAE Technical Paper 2012-01-1092 2012 10.4271/2012-01-1092
- Kandylas , I.P , and Stamatelos , A.M. Engine exhaust system design based on heat transfer computation Energy Conversion and Management 40 1999 1054 1072
- Galindo , G. , Serrano , J.R. , Dolz , V. , and Guilain , S. Design of an exhaust manifold to improve transient performance of a high-speed turbocharged diesel engine Experimental Thermal and Fluid Sceince 28 2004 863 875
- Büchner , S. , Santos Lardies , S. , Degen , A. , Donnerstag , A. et al. A Modular Numerical Simulation Tool Predicting Catalytic Converter Light-Off by Improved Modeling of Thermal Management and Conversion Characteristics SAE Technical Paper 2001-01-0940 2001 10.4271/2001-01-0940
- Wurzenberger , J. , Wanker , R. , and Schüßler , M. Simulation of Exhaust Gas Aftertreatment Systems - Thermal Behavior During Different Operating Conditions SAE Technical Paper 2008-01-0865 2008 10.4271/2008-01-0865
- Satterfield , C.N. Heterogeneous Catalysis in Practice Mc Graw-Hill Book Company 1980
- Thomas , J.M. , and Thomas , W.J. Principles and Practice of Heterogeneous Catalysis VCH Weinheim 1997
- Lafossas , F. , Matsuda , Y. , Mohammadi , A. , Morishima , A. et al. Calibration and Validation of a Diesel Oxidation Catalyst Model: from Synthetic Gas Testing to Driving Cycle Applications SAE Int. J. Engines 4 1 1586 1606 2011 10.4271/2011-01-1244
- Sampara , C.S. , Bissett , E.J. , Chmielewski , M. , and Assanis , D. Global Kinetics for Platinum Diesel Oxidation Catalysts Industrial & Engineering Chemistry Research 46 24 7993 8003 2007
- Premchand , K. , Johnson , J. , Yang , S. , Triana , A. et al. A Study of the Filtration and Oxidation Characteristics of a Diesel Oxidation Catalyst and a Catalyzed Particulate Filter SAE Technical Paper 2007-01-1123 2007 10.4271/2007-01-1123
- Stamatelos , A. , Koltsakis , G. , Kandylas , I. , and Pontikakis , G. Computer aided engineering in diesel exhaust aftertreatment systems design Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 213 6 545 560 1999