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Novel Rankine Cycle for Hybrid Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 10, 2018 by SAE International in United States
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The European Union (EU) has defined legally-binding targets for the fleet of new cars allowing 95 grams CO2 per kilometer in 2021. It is already under discussion to reduce average emissions of the EU car fleet by further 15% in 2025 and again by 30% in 2030 compared to 2021 goal. Therefore, improvement of fuel economy is becoming one of the most important issues for the car manufacturers. Today’s conventional car powertrain systems are reaching their technical limits and will not be able to meet future fuel economy targets without further development of additional measures.
This paper presents the analysis of a Rankine cycle unit applied to improve the overall efficiency of a hybrid electric vehicle (HEV). The authors propose a new concept for recovering a considerable part of exhaust waste heat from an HEV with spark ignition internal combustion engine (ICE) by applying a bottoming Rankine cycle with a Ruths storage tank. It enables the storage of discontinuously available exhaust waste heat from the internal combustion engine as sensible heat in a pressurized working fluid. Thus, the vapor generating process is temporally decoupled from the transient engine operating condition and its unsteady flow of exhaust heat energy. The major benefits of this proposed concept are the utilization of recovered waste heat energy within the hybrid electric powertrain and faster engine warm up resulting in optimum ICE operating conditions.
The potential for fuel economy improvement for the proposed powertrain concept is demonstrated in standard certification cycles by applying vehicle simulation. The simulation models used in this study were validated by experiments.
CitationKraljevic, I., Gottwald, T., and Spicher, U., "Novel Rankine Cycle for Hybrid Vehicles," SAE Technical Paper 2018-01-1711, 2018, https://doi.org/10.4271/2018-01-1711.
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- Bulander , R. Beitrag Verschiedener Antriebskonzepte Zur Erreichung Anspruchsvoller Kliamaziele 38. Int. Wiener Motorensymposium 2017
- Kraljevic , I. , Kollmeier , H.-P. , and Spicher , U. Rankine Cycle for Hybrid Vehicles: The Potential for CO 2 Emissions Reduction ASME Technical Paper ICEF 2015-1096 2015 10.1115/ICEF2015-1096
- Kraljevic , I. , Kollmeier , H.-P. , Rohrpasser , C. , and Striebich , H. 2014
- Bejan , R.B. Advanced Engineering Thermodynamics John Wiley & Sons 1988 978-0471677635
- Ringler , J. , Seifert , M. , Guyotot , V. , and Huebner , W. Rankine Cycle for Waste Heat Recovery of IC Engines SAE Technical Paper 2009-01-0174 2009 10.4271/2009-01-0174
- Edwards , K.D. , Wagner , R. , and Briggs , T. Investigating Potential Light-Duty Efficiency Improvements through Simulation of Turbo-Compounding and Waste-Heat Recovery Systems SAE Technical Paper 2010-01-2209 2010 10.4271/2010-01-2209
- Teng , H. , Regner , G. , and Cowland , C. Waste Heat Recovery of Heavy-Duty Diesel Engines by Organic Rankine Cycle Part I: Hybrid Energy System of Diesel and Rankine Engines SAE Technical Paper 2007-01-0537 2007 10.4271/2007-01-0537
- Freymann , R. , Ringler , R. , Seifert , M. , and Horst , T. Der Turbosteamer der zweiten Generation MTZ Motorentechnische Zeitschrift, MTZ 2 114 119 2012
- Boretti , A. and Watkins , S. Reduced Warm-Up and Recovery of the Exhaust and Coolant Heat with a Single Loop Turbo Steamer Integrated with the Engine Architecture in a Hybrid Electric Vehicle SAE Technical Paper 2013-01-2827 2013 10.4271/2013-01-2827
- Dingel , O. , Semper T. , Luederitz , D. , Neukirchner , H. , Ross , J. Energierueckgewinnung und Downsizing-Widerspruch oder Symbiose? Der Antrieb Von Morgen 2013 2013
- Geskes , P. and Strauss , T. Das Abgaswaerme-Management MTZ Motorentechnische Zeitschrift, MTZ 10 764 771 2006
- Braess , H.-H. , Seiffert , U. Vieweg-Handbuch Kraftfahrzeugtechnik Springer Vieweg 2007 978-3528231149