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Lower Emissions in Commercial Diesel Engines through Waste Heat Recovery
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 27, 2016 by SAE International in United States
Annotation ability available
In order to comply with demanding Greenhous Gas (GHG) standards, future automotive engines employ advanced engine technologies including waste heat recovery (WHR) systems. A waste heat recovery system converts part of engine wasted exergies to useful work which can be fed back to the engine. Utilizing this additional output power leads to lower specific fuel consumption and CO2 emission when the total output power equals the original engine output power. Engine calibration strategies for reductions in specific fuel consumption typically results in a natural increase of NOx emissions. The utilization of waste heat recovery systems provides a pathway which gives both reduction in emissions and reduction in specific fuel consumption.
According to DOE (Department of Energy), US heavy-duty truck engines’ technology need to be upgraded towards higher brake thermal efficiencies (BTE). DOE target is BTE>55% for Class-8 heavy-duty vehicles in the United States. On the other side, the emissions legislation is currently under review in California aiming at around 80% reduction in NOx emission to improve air quality according to California Air Resources Board (CARB). The heavy-duty vehicles are the primary emitters of NOx. Reduction of NOx emission to such stringent proposed target demands a very high NOx catalyst efficiency and more investment in exhaust aftertreatment systems. The waste heat recovery system, however, reduces the fuel consumption as well as the engine out NOx emission at the original engine output power. The reason for that is the engine produces the same power with lower fuel energy which affects the engine operating points in engine fuel maps.
This paper will discuss a feasible waste heat recovery system for on-road heavy-duty diesel engine application under relevant boundary conditions. With the help of thermodynamic calculations the incremental power from waste heat recovery system as well as the fuel economy benefit will be calculated and discussed. As main topic, potentials for reduction of NOx emission and the other pollutants by using waste heat recovery system will be presented for a representative engine.
CitationJeihouni, Y., Eichler, K., and Franke, M., "Lower Emissions in Commercial Diesel Engines through Waste Heat Recovery," SAE Technical Paper 2016-01-8084, 2016, https://doi.org/10.4271/2016-01-8084.
- Technology Assessment Lower NOx Heavy-Duty Diesel Engines California Environmental Protection Agency, Air Resources Board September 2015
- Funding Opportunity Announcement Advanced Systems Level Technology Development, Integration and Demonstration for Efficient Class 8 Trucks (Supertruck II) Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE) February 2016
- Petry H. , Jeihouni Y. , Ritterskamp C. , Rajamani V. , Rosefort Y. , Wiartalla A. , Eichler K. Waste Heat Recovery with Organic Rankine Cycle for Commercial Vehicle Applications Haus der Technik: Strom aus Abwärme 2014
- Eichler , K. , Jeihouni , Y. , and Ritterskamp , C. Fuel Economy Benefits for Commercial Diesel Engines with Waste Heat Recovery SAE Int. J. Commer. Veh. 8 2 491 505 2015 10.4271/2015-01-2807
- Neitz M. , Wiartalla A. , Lauer S. Technology trends in commercial vehicle base engine development MTZ worldwide 73 October 2012
- Quoilin S. An introduction to thermodynamic applied to Organic Rankine Cycles University of Liège 2008
- Eichler K. , Jeihouni Y. , Ritterskamp C. , Rajamani V. , Petry H. , Rosefort Y. Viability of advanced waste heat recovery systems to meet future CO 2 legislation requirements for commercial vehicle VDI Fachkonferenz: Thermische Rekuperation in Fahrzeugen 2015
- Jeihouni Y. , Franke M. , Lierz K. , Tomazic D. , Heuser P. Waste Heat Recovery for Locomotive Engines using the Organic Rankine Cycle ASME ICEF 2015 November 8-11, 2015 Houston, TX, USA
- Gravel R. SuperTruck - An Opportunity to Reduce GHG Emissions while Meeting Service Demands Conference on Climate Policy in an Energy Boom Pacific Grove, California August 6 - 9, 2013
- Aneja R. , Singh S. , Sisken K. Exhaust Heat Driven Rankine Cycle for a Heavy Duty Diesel Engine Daimler report for waste heat recovery system, Supertruck program October 5 2011
- Koeberlein D. Technology and System Level Demonstration of Highly Efficient and Clean, Diesel Powered Class 8 Trucks Cummins SuperTruck Program June 12 2015
- Nine R. , Gravel R. , Zukouski R. SuperTruck - Development and Demonstration of a Fuel-Efficient Class 8 Tractor & Trailer Engine Systems Navistar DOE Merit Review June 12 2015
- Heavy-Duty Supplemental Emissions Test (SET) DieselNet https://www.dieselnet.com/standards/cycles/set.php
- Heavy-Duty FTP Transient Cycle DieselNet https://www.dieselnet.com/standards/cycles/ftp_trans.php
- National Institute of Standart and Technology 2016
- Forschungsvereinigung Verbrennungskraftmaschinen Rankine-Fluid - Vorhaben Nr. 1096 2015