Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions

Cleaner air quality is becoming a global concern, thus to improve the fuel and combustion process is vital. In this paper, computational fluid dynamics (CFD) analysis software CFD-ACE is used to investigate the flow behavior of methane and air in a compressed natural gas (CNG)–air mixer to be imple...

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Main Authors: M. M., Noor, Talal, Yusaf, Baker, P., Hamawand, I.
Format: Article
Language:English
Published: Universiti Malaysia Pahang 2013
Subjects:
Online Access:http://umpir.ump.edu.my/id/eprint/5306/1/29_Yusaf_et_al..pdf
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author M. M., Noor
Talal, Yusaf
Baker, P.
Hamawand, I.
author_facet M. M., Noor
Talal, Yusaf
Baker, P.
Hamawand, I.
author_sort M. M., Noor
collection UMP
description Cleaner air quality is becoming a global concern, thus to improve the fuel and combustion process is vital. In this paper, computational fluid dynamics (CFD) analysis software CFD-ACE is used to investigate the flow behavior of methane and air in a compressed natural gas (CNG)–air mixer to be implemented in a CNG–diesel dual-fuel stationary engine. The effect of the number of mixer holes on the mixture quality was evaluated. The results of the 3D CFD simulation showed that the 8-hole Venturi mixer gave superior performance compared to the 4-hole mixer. Further analysis was carried out on the 8-hole Venturi mixer to investigate the effect of engine speed on the mass flow rate of CNG and the equivalence air to fuel ratio (1/). The second half of the paper presents comparative performance results between a single cylinder research compression ignition (CI) engine fueled with a CNG–diesel system and a conventional CI engine fueled by conventional diesel. The engine was equipped with the simulated 8hole Venturi mixer. The result showed a significant reduction in exhaust gas emission components (NOx, CO and CO) from the CNG–diesel engine compared to the conventional diesel engine, i.e. the reduction rates were on average of 54%, 59% and 31% respectively. The average power output developed by the dual-fuel engine was 10% higher than the diesel over the power curve.
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spelling UMPir53062015-03-03T09:24:11Z http://umpir.ump.edu.my/id/eprint/5306/ Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions M. M., Noor Talal, Yusaf Baker, P. Hamawand, I. TS Manufactures Cleaner air quality is becoming a global concern, thus to improve the fuel and combustion process is vital. In this paper, computational fluid dynamics (CFD) analysis software CFD-ACE is used to investigate the flow behavior of methane and air in a compressed natural gas (CNG)–air mixer to be implemented in a CNG–diesel dual-fuel stationary engine. The effect of the number of mixer holes on the mixture quality was evaluated. The results of the 3D CFD simulation showed that the 8-hole Venturi mixer gave superior performance compared to the 4-hole mixer. Further analysis was carried out on the 8-hole Venturi mixer to investigate the effect of engine speed on the mass flow rate of CNG and the equivalence air to fuel ratio (1/). The second half of the paper presents comparative performance results between a single cylinder research compression ignition (CI) engine fueled with a CNG–diesel system and a conventional CI engine fueled by conventional diesel. The engine was equipped with the simulated 8hole Venturi mixer. The result showed a significant reduction in exhaust gas emission components (NOx, CO and CO) from the CNG–diesel engine compared to the conventional diesel engine, i.e. the reduction rates were on average of 54%, 59% and 31% respectively. The average power output developed by the dual-fuel engine was 10% higher than the diesel over the power curve. Universiti Malaysia Pahang 2013 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5306/1/29_Yusaf_et_al..pdf M. M., Noor and Talal, Yusaf and Baker, P. and Hamawand, I. (2013) Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions. International Journal of Automotive and Mechanical Engineering (IJAME), 8. pp. 1416-1429. ISSN 1985-9325(Print); 2180-1606 (Online). (Published) http://ijame.ump.edu.my/images/Volume_8/29_Yusaf%20et%20al..pdf
spellingShingle TS Manufactures
M. M., Noor
Talal, Yusaf
Baker, P.
Hamawand, I.
Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title_full Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title_fullStr Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title_full_unstemmed Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title_short Effect of Compressed Natural Gas Mixing on the Engine Performance and Emissions
title_sort effect of compressed natural gas mixing on the engine performance and emissions
topic TS Manufactures
url http://umpir.ump.edu.my/id/eprint/5306/1/29_Yusaf_et_al..pdf
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