Numerical investigation into natural gas–diesel dual-fuel engine configuration

Jing, Baocong and Wandel, Andrew P. (2017) Numerical investigation into natural gas–diesel dual-fuel engine configuration. In: 11th Asia-Pacific Conference on Combustion, 10-14 Dec 2017, Sydney, Australia.

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Abstract

Natural gas is used as an additive to a Diesel engine in a dual-fuel configuration. The natural gas is port injected with the charge, while the Diesel is directly injected. The effect of increasing the energy content contributed by the natural gas (to 11% and 22%) is tested for two engine speeds (2000 and 2500 rpm) using ANSYS Forte with n-heptane as the surrogate fuel for Diesel and methane as the surrogate fuel for natural gas. It was found that the main combustion phase was retarded by additional amounts of natural gas, with 22% methane approaching misfire at 2500 rpm. The thermal efficiency for the other methane cases was higher than Diesel at the corresponding engine speeds, with 11% methane the highest at both engine speeds. Increasing the amount of natural gas significantly reduced the emissions of CO and NOx. Because the natural gas is separately regulated, in practice the amount can be dynamically controlled by the ECU to satisfy the desired performance/emissions levels. The current results suggest that small amounts of natural gas can have a significant positive influence on the emissions profile.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions preventing deposit.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 08 Feb 2018 06:23
Last Modified: 02 Jul 2018 00:28
Fields of Research : 09 Engineering > 0902 Automotive Engineering > 090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
Socio-Economic Objective: B Economic Development > 85 Energy > 8507 Energy Conservation and Efficiency > 850702 Energy Conservation and Efficiency in Transport
URI: http://eprints.usq.edu.au/id/eprint/33561

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