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Thermodynamic and Practical Benefits of Waste Energy Recovery Using an Electric Turbo-Generator Under Different Boosting Methods
Technical Paper
2018-01-0851
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper provides insight into the tradeoffs between exhaust energy recovery and increased pumping losses from the flow restriction of the electric turbo-generator (eTG) assessed using thermodynamic principles and with a detailed GT-Power engine model. The GT-Power engine model with a positive displacement expander model was used to predict the influence of back pressure on in-cylinder residuals and combustion. The eTG is assessed for two boosting arrangements: a conventional turbocharger (TC) and an electrically assisted variable speed (EAVS) supercharger (SC). Both a low pressure (post-turbine) and high pressure (pre-turbine) eTG are considered for the turbocharged configuration. The reduction in fuel consumption (FC) possible over various drive cycles is estimated based on the steady-state efficiency of frequently visited operating points assuming all recovered energy can be reused at an engine efficiency of 30% with 10% losses in the electrical path. On the city FTP and US06 cycles, the EAVS SC engine benefits more than the turbocharged from adding the eTG. The opposite is observed for the highway cycle where adding the eTG causes greater fuel consumption reductions for the turbocharged engine. Boost reserve in the TC case at low load, however, makes the EAVS SC with eTG (boost-by-wire) a better boosting and energy recovery system overall with reductions in FC up to 1.4%, 2.4% and 4.6% relative to the TC engine over the FTP, highway and US06 cycles respectively.
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Kiwan, R., Middleton, R., and Stefanopoulou, A., "Thermodynamic and Practical Benefits of Waste Energy Recovery Using an Electric Turbo-Generator Under Different Boosting Methods," SAE Technical Paper 2018-01-0851, 2018, https://doi.org/10.4271/2018-01-0851.Data Sets - Support Documents
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References
- Chu , S. and Majumdar , A. Opportunities and Challenges for a Sustainable Energy Future Nature 488 7411 294 2012
- Patterson , A. , Tett , R. , and McGuire , J. Exhaust Heat Recovery using Electro-Turbogenerators SAE Technical Paper 2009-01-1604 2009 10.4271/2009-01-1604
- Hountalas , D. , Katsanos , C. , and Lamaris , V. Recovering Energy from the Diesel Engine Exhaust Using Mechanical and Electrical Turbocompounding SAE Technical Paper, 2007-01-1563 2007 10.4271/2007-01-1563
- Arias , D.A. , Shedd , T.A. , and Jester , R.K. Theoretical Analysis of Waste Heat Recovery from an Internal Combustion Engine in a Hybrid Vehicle SAE Technical Paper, 2006-01-1605 2006 10.4271/2006-01-1605
- He , G. and Xie , H. Fuel Saving Potential of Different Turbo-Compounding Systems Under Steady and Driving Cycles SAE Technical Paper, 2015-01-0878 2015 10.4271/2015-01-0878
- Brands , M.C. , Werner , J.R. , and Hoehne , J.L. Vehicle Testing of Cummins Turbocompound Diesel Engine SAE Technical Paper, 810073 1980
- Wilson , D. 1986
- Teo Sheng Jye , A. , Pesiridis , A. , and Rajoo , S. 2013 10.4271/2013-01-0103
- David P, B. Ana C, F. Michael G, R. Dean J.S. Effectiveness of Mechanical Turbo Compounding in a Modern Heavy-Duty Diesel Engine International Journal of Automotive Engineering 3 2 69 73 2012
- Briggs , I. , McCullough , G. , Spence , S. , Douglas , R. et al. Waste Heat Recovery on a Diesel-Electric Hybrid Bus Using a Turbogenerator SAE Technical Paper, 2012-01-1945 2012 10.4271/2012-01-1945
- Lu , P. , Brace , C. , and Hu , B. Explore and Extend the Effectiveness of Turbo-compounding in a 2.0 Litres Gasoline Engine SAE Technical Paper, 2015-01-1279 2015 10.4271/2015-01-1279
- Mamat , A.M. , Romagnoli , A. , and Martinez-Botas , R.F. Characterisation of a Low Pressure Turbine for Turbocompounding Applications in a Heavily Downsized Mild-Hybrid Gasoline Engine Energy 64 3 16 2014
- Ismail , Y. , Durrieu , D. , Menegazzi , P. , Chesse , P. , et al. Potential of Exhaust Heat Recovery by Turbocompounding SAE Technical Paper, 2012-01-1603 2012 10.4271/2012-01-1603
- Dijkstra , R. , Boot , M. , Eichhorn , R. , Smeulders , D. et al. Experimental Analysis of Engine Exhaust Waste Energy Recovery Using Power Turbine Technology for Light Duty Application SAE International Journal of Engines 5 1729 1739 2012 10.4271/2012-01-1749
- Nazari , S. , Siegel , J. , and Stefanopoulou , A. Control of Hybrid Boosting in Highly Diluted Internal Combustion Engines Submitted to IEEE Transactions on Control Systems Technology 2018
- Middleton , R. J. Voronoi Partitions for Assessing Fuel Consumption of Advanced Technology Engines: An Approximation of Full Vehicle Simulation on a Drive Cycle SAE Technical Paper, 2018-01-0317 2018
- Nazari , S. , Middleton , R. J. , Sugimori , K. , Siegel , J. , et al. Assessing a Hybrid Supercharged Engine for Highly Diluted Combustion Using a Dynamic Drive Cycle Simulation SAE Technical Paper, 2018-01-0969 2018
- Livengood , J. and Wu , P. Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines Symposium (International) on Combustion 5 347 356 Elsevier 1955
- Hoepke , B. , Jannsen , S. , Kasseris , E. , and Cheng , W.K. EGR Effects on Boosted SI Engine Operation and Knock Integral Correlation SAE International Journal of Engines 5 547 559 2012 10.4271/2012-01-0707
- Middleton , R. J. , Gupta , O. G. H. , Chang , H.-Y. , Lavoie , G. , et al. Fuel Efficiency Estimates for Future Light Duty Vehicles, Part A: Engine Technology and Efficiency 2016-01-0906 2016 10.4271/2016-01-0906
- Westin , F. , Grandin , B. , and Angström , H.-E. The Influence of Residual Gases on Knock in Turbocharged SI-Engines SAE Technical Paper, 2000-01-2840 2000 10.4271/2000-01-2840
- Middleton , R.J. , Martz , J.B. , Lavoie , G.A. , Babajimopoulos , A. et al. A Computational Study and Correlation of Premixed Isooctane Air Laminar Reaction Fronts Diluted with EGR Combustion and Flame 159 10 3146 3157 2012
- Nazari , S. , Kiwan , R. , Siegel , J. , and Stefanopoulou , A. Waste Energy Recovery Through Turbo Generation: Unexpected Fuel Efficiency Sweet Spot for Transient Calibration American Control Conference (ACC), 2018 2018