Article (Scientific journals)
A parametric study on the emissions from an HCCI alternative combustion engine resulting from the auto-ignition of primary reference fuels
Machrafi, Hatim; Cavadias, Simeon; Amouroux, Jacques
2008In Applied Energy, 85 (8), p. 755-764
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Keywords :
alternative combustion; pollution reduction; emission characteristics; HCCl
Abstract :
[en] The homogeneous charge compression ignition is an alternative combustion technology that can reduce automobile pollution, provided that the exhaust emission can be controlled. A parametric study can be useful in order to gain more understanding in the emission reduction possibilities via this new combustion technology. For this purpose, the inlet temperature, the equivalence ratio and the compression ratio are changed, respectively, from 30 to 70 degrees C, 0.28 to 0.41 and 6 to 14. Also the diluting, thermal and chemical effects of exhaust gas recirculation were studied. The emission of CO, CO2, O-2 and hydrocarbons has been measured using primary reference fuels. It appears that an increase in the inlet temperature, the EGR temperature, the equivalence ratio and the compression ratio results into a decrease of the emissions of CO and the hydrocarbons of up to 75%. The emission of CO2 increased, however, by 50%. The chemical parameters showed more complicated effects, resulting into a decrease or increase of the emissions, depending on whether the overall reactivity increased or not. If the reactivity increased, generally, the emissions of CO and hydrocarbons increased, while that of CO2 increased. The increase of CO2 emissions could be compensated by altering the compression ratio and the EGR parameters, making it possible to control the emission of the HCCI engine. (c) 2008 Elsevier Ltd. All rights reserved.
Disciplines :
Chemical engineering
Energy
Author, co-author :
Machrafi, Hatim 
Cavadias, Simeon
Amouroux, Jacques
Language :
English
Title :
A parametric study on the emissions from an HCCI alternative combustion engine resulting from the auto-ignition of primary reference fuels
Publication date :
2008
Journal title :
Applied Energy
ISSN :
0306-2619
eISSN :
1872-9118
Publisher :
Elsevier Sci Ltd, Oxford, United Kingdom
Volume :
85
Issue :
8
Pages :
755-764
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 July 2011

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