This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Potential of Exhaust Heat Recovery by Turbocompounding
Technical Paper
2012-01-1603
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Energy recovery of internal combustion engines has proved to be of primary interest to increase engine global efficiency. The motivation behind is to meet future fuel economy requirements and more stringent emissions regulations. Among all engine waste, research has shown that exhaust energy is the most promising solution due to its high availability. In this context, this paper deals with the analysis of the potential of exhaust heat recovery, especially by a turbocompound system. Turbo-compounding is already established in heavy-duty engines, in which an additional stage of expansion is made through an exhaust recovery turbine. This technique is now being studied for small displacement engines. In the first part of this document, a short history on turbocompounding is presented. Then we present a simulation study conducted on AMESim software, using a 0D 2L diesel engine model, calibrated to fit real engine test bench results. In order to investigate the sensitivity of the engine to a turbocompound system, the existing exhaust line has been modified. Back pressure is analysed by exhaust throttling using a simple converging nozzle for multiple section ratios. The effect of the increase of the exhaust back pressure on the engine is revealed by the increase of residual gases, the delay of combustion, the increase in heat transfer in the cylinder, the variation of global engine thermodynamic balance, and the effect on LP loop (negative pumping work). The equivalent isentropic power of the pressure drop across the nozzle is evaluated and the global gain of engine and exhaust power is assessed on the overall engine map. The comparison of the throttled engine and the original one is done at steady state speed and load points, by maintaining constant the quantity of fuel injected for both engines. The potential of this system is evaluated to determine the practicality of installing such a system on a small displacement engine.
Recommended Content
Authors
Topic
Citation
Ismail, Y., Durrieu, D., Menegazzi, P., Chesse, P. et al., "Potential of Exhaust Heat Recovery by Turbocompounding," SAE Technical Paper 2012-01-1603, 2012, https://doi.org/10.4271/2012-01-1603.Also In
References
- Leonard, J. History of the turbocompound http://www.rotaryeng.net/sum-turbo-comp.html
- Tennant, D. Walsham, B. “The Turbocompound Diesel Engine,” SAE Technical Paper 890647 1989 10.4271/890647
- Patterson, A. Tett, R. McGuire, J. “Exhaust Heat Recovery using Electro-Turbogenerators,” SAE Technical Paper 2009-01-1604 2009 10.4271/2009-01-1604
- Brands, M. Werner, J. Hoehne, J. Kramer, S. “Vechicle Testing of Cummins Turbocompound Diesel Engine,” SAE Technical Paper 810073 1981 10.4271/810073
- Wilson, D. “The Design of a Low Specific Fuel Consumption Turbocompound Engine,” SAE Technical Paper 860072 1986 10.4271/860072
- Holtman, R. “Testing of a Low Specific Fuel Consumption Turbocompound Engine,” SAE Technical Paper 870300 1987 10.4271/870300
- Jianqin, F. Jingping, L. Yanping, Y. Hanqian, Y. “A Study on the Prospect of Engine Exhaust Gas Energy Recovery” Electric Information and Control Engineering (ICEICE), international congress 2011 Wuhan April 15 17 2011
- Hopmann, U. Algrain, M. “Diesel Engine Electric Turbo Compound Technology,” SAE Technical Paper 2003-01-2294 2003 10.4271/2003-01-2294
- Barba, C. Burkhardt, C. Boulouchos, K. Bargende, M. “A Phenomenological Combustion Model for Heat Release Rate Prediction in High-Speed DI Diesel Engines with Common Rail Injection,” SAE Technical Paper 2000-01-2933 2000 10.4271/2000-01-2933
- Lafossas, F.-A. Marbaix, M. Menegazzi, P. “Development of a Coupling Approach between 0D D.I. Diesel Combustion and Pollutant Models:Application to a Transient Engine Evolution” OGST-Rev IFP 63 4 479 494 2008 10.2516/ogst:2008035
- Cong, S. Garner, C.P. McTaggart-Cowan, G.P. “The Effects of Exhaust Back Pressure on Conventional and Low-Temperature Diesel Combustion” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 225 222 222 235 2011 10.1177/09544070JAUTO1577
- Maiboom, A. Tauzia, X. Hétet, J. Cormerais, M. et al. “Various effects of EGR on combustion and emissions on an automotive DI Diesel engine: numerical and experimental study,” SAE Technical Paper 2007-01-1834 2007 10.4271/2007-01-1834
- Maiboom, A. Tauzia, X. Shah, S. Hétet, J. “Experimental Study of an LP EGR System on an Automotive Diesel Engine, compared to HP EGR with respect to PM and NOx Emissions and Specific Fuel Consumption,” SAE Int. J. Engines 2 2 597 610 2010 10.4271/2009-24-0138
- Jang, J. Yeom, K. Bae, C. “Effects of Exhaust Throttling on Engine Performance and Residual Gas in an SI Engine,” SAE Technical Paper 2004-01-2974 2004 10.4271/2004-01-2974