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Research Papers: Air Emissions From Fossil Fuel Combustion

Combustion and Emission Characterization of n-Butanol Fueled HCCI Engine

[+] Author and Article Information
Rakesh Kumar Maurya

Engine Research Laboratory,
Department of Mechanical Engineering,
Indian Institute of Technology Kanpur,
Kanpur 208016, India

Avinash Kumar Agarwal

Engine Research Laboratory,
Department of Mechanical Engineering,
Indian Institute of Technology Kanpur,
Kanpur 208016, India
e-mail: akag@iitk.ac.in

1Present address: School of Mechanical Materials and Energy Engineering, Indian Institute of Technology Ropar, Rupnagar 140001, India.

2Corresponding author.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received November 11, 2013; final manuscript received June 19, 2014; published online July 29, 2014. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 137(1), 011101 (Jul 29, 2014) (12 pages) Paper No: JERT-13-1318; doi: 10.1115/1.4027898 History: Received November 11, 2013; Revised June 19, 2014

Biofuels are attracting global attention as alternate transportation fuels due to advantages of their being produced from locally available renewable resources, lower pollution potential, and biodegradable nature. Butanol is fast emerging as one of the competitive biofuels for use in transportation engines. Homogeneous charge compression ignition (HCCI) engines have shown great potential for higher engine efficiency and ultralow NOx and particulate matter (PM) emissions. This experimental study is therefore carried out to combine the advantages of biofuels and HCCI engines, both. Detailed performance, combustion, and emission characteristics of n-butanol fueled HCCI engine are investigated experimentally. The study is conducted on a four cylinder diesel engine, whose one cylinder was modified to operate in HCCI combustion mode. Port fuel injection technique was used for homogeneous charge preparation in the intake manifold. Auto-ignition of fuel in the engine cylinder was achieved by intake air preheating. In-cylinder pressure-crank angle data acquisition with subsequent heat release analyses and exhaust emission measurements were done for combustion and emission characterization. In this paper, the effect of intake air temperature and air–fuel ratio on the combustion parameters, thermal and combustion efficiency, ringing intensity (RI), and emissions from n-butanol fueled HCCI engine were analyzed and discussed comprehensively. Empirical correlations were derived to fit the experimental data for various combustion parameters.

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Figures

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Fig. 1

Schematic of the experimental setup

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Fig. 7

Comparison of predicted and experimental IMEP for gasoline and n-butanol HCCI

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Fig. 6

Variation of IMEP with (a) λ (b) fuel energy per cycle for n-butanol HCCI

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Fig. 5

Comparison of HCCI operating range for gasoline and n-butanol

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Fig. 4

HCCI operating range for n-butanol at (a) 1200 rpm (b) 2400 rpm

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Fig. 3

HCCI operating range for gasoline at (a) 1200 rpm (b) 2400 rpm

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Fig. 2

Illustration of method for determination of HCCI operating range

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Fig. 8

Effect of λ on combustion efficiency for gasoline and n-butanol HCCI at different intake air temperatures

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Fig. 9

Variation of combustion efficiency in HCCI operating range for n-butanol

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Fig. 10

Effect of λ and Ti on gross indicated thermal efficiency of gasoline and n-butanol HCCI

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Fig. 11

Variation of ISFC in HCCI operating range for gasoline and n-butanol

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Fig. 18

Variation of THC emissions in HCCI operating range for gasoline and n-butanol

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Fig. 12

Variation of RI with λ and Ti for gasoline and n-butanol HCCI

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Fig. 13

Effect of combustion phasing on RI for gasoline HCCI

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Fig. 15

NOx emissions in HCCI operating range for gasoline and n-butanol

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Fig. 16

Effect of IMEP and Ti on CO emissions from gasoline HCCI

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Fig. 17

Variation of CO emissions in HCCI operating range for gasoline and n-butanol

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Fig. 14

Effect of combustion phasing (CA50) on NOx emissions for different λ for gasoline HCCI

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