Jing, Baocong (2017) Investigation of Natural Gas as an Additive to Diesel in HCCI Engines. Research Masters thesis, University of Southern Queensland. (Unpublished)
Abstract
Homogeneous Charge Compression Ignition (HCCI) technology has attracted most of the experts’ interests since there are so many merits on its performance, such as lower emissions of NOx and CO, higher thermal efficiency (above 40% generally) and low fuel consumptions as well. Its capacities under higher compression ratio, multiple fuels injection, heavy load and fast engine speed also leads to be as a new generation of engine now and in the future. The methodology presents a marginally good validation against the experimental statistics on HCCI performance on cylinder pressure and heat release rate versus different engine speed and compression ratios. The investigation on diesel fuel with natural gas as additive has been done, from its outcomes from simulation in ANSYS Forte, to verify its advantages mentioned above. As certain amount of natural gas, premixed with air in engine cylinder, joins diesel fuel on HCCI combustion for the same conditions (engine speed, compression ratio and initial conditions of temperature and pressure), the thermal efficiency is improved by 10% natural gas in mass as additive, premixed with air in advance to diesel injection. Similarly, natural gas as additive also reduces the emissions of NOx and CO from the simulation results. Apart from that, the impacts of various compression ratio and engine speed on HCCI engine performance have been studied and addressed in this paper. At last, with all the analysis and discussions, 90% diesel with 10% natural gas in mass turned out to be the best option on HCCI combustion from Forte simulation results.
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| Item Type: | Thesis (Non-Research) (Research Masters) |
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| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Current - Faculty of Health, Engineering and Sciences - No Department (1 Jul 2013 -) |
| Supervisors: | Wandel, Andrew |
| Qualification: | Master of Engineering Sciences (Mechanical) |
| Date Deposited: | 19 Mar 2026 03:16 |
| Last Modified: | 19 Mar 2026 03:16 |
| Uncontrolled Keywords: | HCCI (Homogeneous Charge Compression Ignition) engine; NOx and CO emissions; Diesel and Natural Gas; Experimental validation |
| URI: | https://sear.unisq.edu.au/id/eprint/53184 |
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