NDLI: Comparison of Propane and Methane Performance and Emissions in a Turbocharged Direct Injection Dual Fuel Engine

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Gibson, C. M. Polk, A. C. Shoemaker, N. T. Srinivasan, K. K. Krishnan, S. R.
Copyright Year	2010
Abstract	With increasingly restrictive NOx and PM emissions standards, the recent discovery of new natural gas reserves, and the possibility of producing propane efficiently from biomass sources, dual fueling strategies have become more attractive. This paper presents experimental results from dual-fueling a four-cylinder turbocharged DI diesel engine with propane or methane (a natural gas surrogate) as the primary fuel and diesel as the ignition source. Experiments were performed with the stock ECU at a constant speed of 1800 rev/min, and a wide range of BMEPs (2.7 to 11.6 bar) and percent energy substitutions (PES) of C3H8 and CH4. Brake thermal efficiencies (BTE) and emissions (NOx, smoke, THC, CO, and CO2) were measured. Maximum PES levels of about 80–95 percent with CH4 and 40–92 percent with C3H8 were achieved. Maximum PES was limited by poor combustion efficiencies and engine misfire at low loads for both C3H8 and CH4, and the onset of knock above 9 bar BMEP for C3H8. While dual fueling BTEs were lower than straight diesel BTEs at low loads, they approached diesel BTE values at high loads. With dual fueling, NOx and smoke reductions (from diesel values) were as high as 66–68 percent and 97 percent, respectively, but CO and THC emissions were significantly higher with increasing PES at all engine loads.
Sponsorship	Internal Combustion Engine Division
Starting Page	203
Ending Page	213
Page Count	11
File Format	PDF
ISBN	9780791849446
DOI	10.1115/ICEF2010-35128
e-ISBN	9780791838822
Conference Proceedings	ASME 2010 Internal Combustion Engine Division Fall Technical Conference
Language	English
Publisher Date	2010-09-12
Publisher Place	San Antonio, Texas, USA
Access Restriction	Subscribed
Subject Keyword	Methane Carbon dioxide Ignition Combustion Smoke Biomass Fuels Engines Stress Emissions Diesel engines Nitrogen oxides Diesel Thermal efficiency Brakes Natural gas Cylinders
Content Type	Text
Resource Type	Article

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Performance and Emissions Characteristics of Bio-Diesel (B100)-Ignited Methane and Propane Combustion in a Four Cylinder Turbocharged Compression Ignition Engine

Analysis of Ignition Behavior in a Turbocharged Direct Injection Dual Fuel Engine Using Propane and Methane as Primary Fuels

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