Performance and emissions characteristics of bio-diesel (B100)-ignited methane and propane combustion in a four cylinder turbocharged compression ignition engine
- Mississippi State Univ., Mississippi State, MS (United States)
Different combustion strategies and fuel sources are needed to deal with increasing fuel efficiency demands and emission restrictions. One possible strategy is dual fueling using readily available resources. Propane and natural gas are readily available with the current infrastructure and biodiesel is growing in popularity as a renewable fuel. This paper presents experimental results from dual fuel combustion of methane (as a surrogate for natural gas) and propane as primary fuels with biodiesel pilots in a 1.9 liter, turbocharged, 4 cylinder diesel engine at 1800 rev/min. Experiments were performed with different percentage energy substitutions (PES) of propane and methane and at different brake mean effective pressures (BMEP/bmep). Brake thermal efficiency (BTE) and emissions (NOx, HC, CO, CO2, O2 and smoke) were also measured. Maximum PES levels for B100-methane dual fuelling were limited to 70% at 2.5 bar bmep and 48% at 10 bar bmep, and corresponding values for B100-propane dual fuelling were 64% and 43%, respectively. Maximum PES was limited by misfire at 2.5 bar bmep and the onset of engine knock at 10 bar bmep. Dual fuel BTEs approached straight B100 values at 10 bar bmep while they were significantly lower than B100 values at 2.5 bar bmep. In general dual fuelling was beneficial in reducing NOx and smoke emissions by 33% and 50%, respectively from baseline B100 levels; however, both CO and THC emissions were significantly higher than baseline B100 levels at all PES and loads.
- Research Organization:
- Mississippi State Univ., Mississippi State, MS (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- FG36-06GO86025
- OSTI ID:
- 1079600
- Report Number(s):
- GO8602558
- Journal Information:
- Proceedings of the Technical Conference of the ASME Internal Combusion Engine Division, Vol. 2011; Conference: ASME 2011 Internal Combustion Engine Division Fall Technical Conference, Morgantown, WV (United States), 2-5 October 2011; ISSN 1524-9433
- Publisher:
- ASME
- Country of Publication:
- United States
- Language:
- English
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