Performance and gaseous and particle emissions from a liquefied petroleum gas (LPG) fumigated compression ignition engine

Surawski, N.C., Miljevic, B., Bodisco, T.A., Situ, R., Brown, R.J., and Ristovski, Z.D. (2014) Performance and gaseous and particle emissions from a liquefied petroleum gas (LPG) fumigated compression ignition engine. Fuel , 133. pp. 17-25.

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Abstract

In this study, an LPG fumigation system was fitted to a Euro III compression ignition (CI) engine to explore its impact on performance, and gaseous and particulate emissions. LPG was introduced to the intake air stream (as a secondary fuel) by using a low pressure fuel injector situated upstream of the turbocharger. LPG substitutions were test mode dependent, but varied in the range of 14-29% by energy. The engine was tested over a 5 point test cycle using ultra low sulphur diesel (ULSD), and a low and high LPG substitution at each test mode. The results show that LPG fumigation coerces the combustion into pre-mixed mode, as increases in the peak combustion pressure (and the rate of pressure rise) were observed in most tests. The emissions results show decreases in nitric oxide (NO) and particulate matter (PM2.5) emissions; however, very significant increases in carbon monoxide (CO) and hydrocarbon (HC) emissions were observed. A more detailed investigation of the particulate emissions showed that the number of particles emitted was reduced with LPG fumigation at all test settings - apart from mode 6 of the ECE R49 test cycle. Furthermore, the particles emitted generally had a slightly larger median diameter with LPG fumigation, and had a smaller semi-volatile fraction relative to ULSD. Overall, the results show that with some modifications, LPG fumigation systems could be used to extend ULSD supplies without adversely impacting on engine performance and emissions.

Item ID: 36194
Item Type: Article (Refereed Research - C1)
Keywords: liquefied petroleum gas, fumigation, engine performance, gaseous emissions, particulate emissions
ISSN: 1873-7153
Date Deposited: 12 Nov 2014 10:55
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091599 Interdisciplinary Engineering not elsewhere classified @ 20%
04 EARTH SCIENCES > 0401 Atmospheric Sciences > 040101 Atmospheric Aerosols @ 40%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050206 Environmental Monitoring @ 40%
SEO Codes: 85 ENERGY > 8598 Environmentally Sustainable Energy Activities > 859803 Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation) @ 30%
85 ENERGY > 8507 Energy Conservation and Efficiency > 850702 Energy Conservation and Efficiency in Transport @ 30%
96 ENVIRONMENT > 9601 Air Quality > 960199 Air Quality not elsewhere classified @ 40%
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