Effect of compressed natural gas mixing on the engine performance and emissions
Article
| Article Title | Effect of compressed natural gas mixing on the engine performance and emissions |
|---|---|
| ERA Journal ID | 200681 |
| Article Category | Article |
| Authors | Yusaf, T. (Author), Baker, P. (Author), Hamawand, I. (Author) and Noor, M. M. (Author) |
| Journal Title | International Journal of Automotive and Mechanical Engineering |
| Journal Citation | 8 (1), pp. 1416-1429 |
| Number of Pages | 14 |
| Year | 2013 |
| Place of Publication | Malaysia |
| ISSN | 2180-1606 |
| 2229-8649 | |
| Web Address (URL) | http://ijame.ump.edu.my/index.php?option=com_content&view=article&id=36&Itemid=76 |
| Abstract | 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 8-hole Venturi mixer. The result showed a significant reduction in exhaust gas emission components (NOx, CO and CO2) 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. |
| Keywords | Compressed natural gas; gas-mixer; computational fluid dynamics; dual-fuel engine; gas emission |
| ANZSRC Field of Research 2020 | 401703. Energy generation, conversion and storage (excl. chemical and electrical) |
| 519999. Other physical sciences not elsewhere classified | |
| 310699. Industrial biotechnology not elsewhere classified | |
| 401706. Numerical modelling and mechanical characterisation | |
| Public Notes | © Universiti Malaysia Pahang - open access journal - Published Version able to be made available to the public. |
| Byline Affiliations | School of Mechanical and Electrical Engineering |
| National Centre for Engineering in Agriculture | |
| Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q256w/effect-of-compressed-natural-gas-mixing-on-the-engine-performance-and-emissions
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