Impact of propane energy fraction on diesel-ignited propane dual fuel low temperature combustion. (1st December 2017)

• Record Type: Journal Article
• Authors: Hodges, Kyle A.; Aniello, Andrea; Krishnan, Sundar Rajan; Srinivasan, Kalyan Kumar
• Is Part Of: Fuel. Volume 209(2017)
• Page Start: 769
• Page End: 775
• Publication Date: 2017-12-01
• Subjects: AHRR apparent heat release rate -- ATDC after top dead center -- BDC bottom dead center -- BMEP brake mean effective pressure -- BTDC before top dead center -- CA10-90 crank angle degrees between the locations of 10% and 90% cumulative heat release -- CA5 crank angle at which 5% of cumulative heat release occurs -- CA50 crank angle at which 50% of cumulative heat release occurs -- CAD crank angle degrees -- CO carbon monoxide -- COV coefficient of variation -- EGR exhaust gas recirculation -- EOI end of injection of diesel -- FSN filter smoke number -- HC unburned hydrocarbon -- HCCI homogeneous charge compression ignition -- ID ignition delay -- IFCE indicated fuel conversion efficiency -- IMEP indicated mean effective pressure -- LHV lower heating value -- LTC low temperature combustion -- MPRR maximum pressure rise rate -- NOx oxides of nitrogen -- PES percent energy substitution -- Pin intake manifold (boost) pressure -- Prail rail pressure -- RCCI reactivity controlled compression ignition -- SOC start of combustion -- SOI start of injection of diesel -- TDC top dead center -- ηcomb combustion efficiency; Dual fuel -- Low temperature combustion -- Injection timing -- RCCI, Propane -- NOx emissions; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2017.07.096
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: This paper focuses on quantifying the effects of percent energy substitution of propane on Diesel-ignited Propane Dual Fuel Low Temperature Combustion (DPDFLTC) performed in a single cylinder research engine (SCRE). All the experiments were performed with the engine load and speed held constant at 1500 rev/min and 3.3 bar BMEP, respectively. The intake pressure and temperature were held constant at 150 kPa and 30 °C, respectively, the diesel injection timing and injection pressure were maintained at 310 CAD (50 deg. BTDC) and 500 bar, while the propane energy fraction (PEF) was varied throughout the experiment. The results indicate that the maximum PEF was limited by to 90% due to high cyclic combustion variability (COV imep ∼ 11%), and the minimum PEF was limited to 53% due to onset of engine knock (MPRR ∼ 10.5 bar/deg). Additionally, the engine-out unburned hydrocarbon emissions decreased from nearly 40 g/kWh at 90%PEF to about 10 g/kWh at 53% PEF, the engine-out carbon monoxide emissions decreased from nearly 30 g/kWh 90% PEF to about 5 g/kWh at 53% PEF and the engine-out nitrogen oxide emissions increased from 0.1 g/kWh 90% PEF to 1.5 g/kWh at 53% PEF; whereas, engine-out smoke emissions remained low throughout the experimental program.