This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Integration of an ORC Waste Heat Recovery with Electrification and Supercharging through Use of a Planetary Gear System for a Class 8 Tractor Application
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 2, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
A novel approach to the Integration of Turbocompounding/WHR, Electrification and Supercharging technologies (ITES) to reduce fuel consumption in a medium heavy-duty diesel engine was previously published by FEV. This paper describes a modified approach to ITES to reduce fuel consumption on a heavy-duty diesel engine applied in a Class 8 tractor.
The original implementation of the ITES incorporated a turbocompound turbine as the means for waste heat recovery. In this new approach, the turbocompound unit connected to the sun gear of the planetary gear set has been replaced by an organic Rankine cycle (ORC) turbine expander. The secondary compressor and the electric motor-generator are connected to the ring gear and the carrier gear respectively. The ITES unit is equipped with dry clutch and band brake allowing flexibility in mechanical and electrical integration of the ORC expander, secondary compressor and electric motor-generator to the engine. This approach supports electrical integration of ORC expander when the turbine power output is low and mechanical/power-split integration when the turbine power output is high. At low engine speeds and high loads, the secondary compressor can provide power from the ORC expander or from the electric motor. Furthermore, the electric motor-generator can be used for regenerative braking and providing torque assist to the engine when possible. Thus, the new configuration continues to provide a powersplit integration of the applied technologies, helping to achieve optimal management of power flow.
Previously, the ITES system functionality had been validated through engine and vehicle drive cycle simulation utilizing the 48V motor generator unit for powersplit turbocompounding, powersplit supercharging, start-stop, regenerative braking and engine torque assist functionality. The current study focuses on the simulation of the ORC expander equipped ITES system on an 11 liter six cylinder diesel engine that would replace a 15.0 liter six cylinder diesel engine applied in heavy-duty Class 8 tractor. The simulations reveal the ability of the power-dense 10.7 liter engine with ITES system to match the performance of the 15.0 liter six cylinder engine, thus demonstrating a reduction in both expense and space claim while improving the overall system efficiency in comparison to the independent implementation of individual technologies.
CitationJoshi, S., Dahodwala, M., Koehler, E., Dhanraj, F. et al., "Integration of an ORC Waste Heat Recovery with Electrification and Supercharging through Use of a Planetary Gear System for a Class 8 Tractor Application," SAE Technical Paper 2019-01-0229, 2019, https://doi.org/10.4271/2019-01-0229.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
- Federal Register, “Rules and Regulations Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2,” Vol. 81, No. 206, Oct. 25, 2016.
- Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2, Regulatory Impact Analysis, EPA, NHTSA, EPA-420-R-16-900, Aug. 2016.
- Joshi, S., Dahodwala, M., Koehler, E., Franke, M. et al., “Novel Approach to Integration of Turbocompounding, Electrification and Supercharging through Use of Planetary Gear System,” SAE Technical Paper 2018-01-0887, 2018, doi:10.4271/2018-01-0887.
- Joshi, S., Dahodwala, M., Koehler, E., Franke, M., et al., "Controls Development and Vehicle Drive Cycle Analysis of Integrated Turbocompounding, Electrification and Supercharging System,” in ASME, Proceedings of the Internal Combustion Engine Fall Technical Conference 2018, ICEF2018-9703.
- “California Air Resources Board, Draft Technology Assessment: Low NOX Heavy-Duty Engines,” Sep., 2016.
- “California Air Resources Board, Final Report: Evaluating Technologies and Methods to Lower Nitrogen Oxide Emissions from Heavy-Duty Vehicles,” Apr., 2017.
- Dahodwala, M., Joshi, S., Krishnamoorthy, H., Koehler, E. et al., “Evaluation of System Configurations for Downsizing a Heavy-Duty Diesel Engine for Non-Road Applications,” SAE Int. J. Engines 9(4):2272-2285, 2016, doi:10.4271/2016-01-8058.
- Joshi, S.,Dahodwala, M., Koehler, E.,Franke, M., “Engine Strategies to Meet Phase-2 Greenhouse Gas Emission Legislation for Heavy-Duty Diesel Engines” in ASME ICEF2017-3552.
- 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 https://doi.org/10.4271/2015-01-2807.
- Park, T., Teng, H., Hunter, G., van der Velde, B. et al., “A Rankine Cycle System for Recovering Waste Heat from HD Diesel Engines - Experimental Results,” SAE Technical Paper 2011-01-1337, 2011, doi:10.4271/2011-01-1337.
- Bao, J. and Zhao, L., “A Review of Working Fluid and Expander Selections for Organic Rankine cycle,” Renewable and Sustainable Energy Reviews, Elsevier 24(C):325-342, 2013.