Extending the potential of the dual-mode dual-fuel combustion towards the prospective EURO VII emissions limits using gasoline and OMEx. (1st April 2021)

• Record Type: Journal Article
• Authors: Macián, Vicente; Monsalve-Serrano, Javier; Villalta, David; Fogué-Robles, Álvaro
• Is Part Of: Energy conversion and management. Volume 233(2021)
• Publication Date: 2021-04-01
• Subjects: ATS Aftertreatment System -- BMEP Brake Mean Effective Pressure -- BTE Brake Thermal Efficiency -- BSCO Brake Specific CO Emissions -- BSFC Brake Specific Fuel Consumption -- BSFCeq Equivalent Brake Specific Fuel Consumption -- BSHC Brake Specific HC Emissions -- BSNOx Brake Specific NOx Emissions -- BSSoot Brake Specific Soot Emissions -- CAD Crank Angle Degree -- CA10 Crank Angle for 10% of burned fuel mass -- CA50 Crank Angle for 50% of burned fuel mass -- CA90 Crank Angle for 90% of burned fuel mass -- CCS Carbon Capture and Sequestration -- CDC Conventional Diesel Combustion -- CN Cetane Number -- CO Carbon monoxide -- CO2 Carbon dioxide -- DAC Direct Air Capture -- D-G Diesel-Gasoline fuel blend -- DI Direct Injection -- DMDF Dual-Mode Dual-Fuel -- DOC Diesel Oxidizer Catalyst -- DPF Diesel Particulate Filter -- EGR Exhaust Gas Recirculated -- GIE Gross Indicated Efficiency -- H2025 Horizon 2025 -- H2030 Horizon 2030 -- H2O Water -- HC Unburned hydrocarbons -- HCCI Homogeneous Charge Compression Ignition -- HRF High Reactivity Fuel -- ICE Internal Combustion Engine -- LHV Lower Heating Value -- LRF Low Reactivity Fuel -- LTC Low-Temperature Combustion -- MON Motor Octane Number -- NOx Nitrogen Oxides -- OME/POMDE Polyoxymethylene Dimethyl Ether -- OMEx OME3-5 Mix -- OMEx-G OMEx-Gasoline fuel blend -- PER Premixed Energy Ratio -- PFI Port Fuel Injection -- PM Particulate Matter -- PPCI Partially Premixed Compression Ignition -- PRR Pressure Rise Rate -- RoHR Rate of Heat Release -- RON Research Octane Number -- RCCI Reactivity Controlled Compression Ignition -- SCR Selective Catalytic Reducer -- SOC Start of Combustion -- SOI Start of Injection -- TDC Top Dead Centre -- TSCI Thermally Stratified Compression Ignition -- TtW Tank-to-Wheel -- VGT Variable Geometry Turbine -- WHSC World Harmonized Stationary Cycle -- WHTC World Harmonized Transient Cycle -- WHVC World Harmonized Vehicle Cycle -- WtW Well-to-Wheel -- WtT Well-to-Tank; Reactivity controlled compression ignition -- Dual-fuel combustion -- EURO VII -- OMEx -- Emissions reduction; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2021.113927
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Complete dual-fuel engine calibration to fulfill tentative EURO VII emissions levels. OMEx-gasoline leads to higher efficiency than diesel-gasoline fuel combination. Homologation and real driving conditions considered for the results analysis. The use of OMEx allows reaching the CO2 2030 target in a well-to-wheel base. Abstract: Dual-mode dual-fuel (DMDF) combustion strategy has been corroborated to be a potential combustion mode to achieve ultra-low NOx and soot emissions, as requested by the future regulations on internal combustion engines. In addition, the synthetic fuels have arisen in the last years for overcoming the problem of total emissions of CO2 over the fuel life cycle. In the case of DMDF, poly-oxymethylene dimethyl ether (OMEx) has been found a promising alternative to diesel when combined to gasoline. In this sense, the OMEx-gasoline combination promotes ultra-low NOx and zero-soot emissions while maintaining the engine performance and acceptable levels of other regulated emissions. The main objective and novelty of this work is to experimentally evaluate the potential of this architecture to reach post-EURO VI NOx emissions levels at engine-out conditions by means of a dedicated engine calibration. Moreover, to evaluate the implications of using synthetic fuels for the European objectives in terms of CO2 impact considering different driving conditions scenarios by means of a virtual vehicle model. The results show that the OMEx-gasoline DMDF engine can reach engine-out NOx emissions below 0.2 g/kWh with zero-soot emissions in all engine operating map and the impact on fuel consumption is lower than 4% with respect to conventional diesel operation. Also, the H2030 target of 30% CO2 reduction can be achieved in a well-to-wheel base.