A comparative study on the first and second law analysis and performance characteristics of a spark ignition engine using either natural gas or gasoline

Gharehghani, A. and Hosseini, R. and Mirsalim, M. and Yusaf, Talal F. (2015) A comparative study on the first and second law analysis and performance characteristics of a spark ignition engine using either natural gas or gasoline. Fuel, 158. pp. 488-493. ISSN 0016-2361

Abstract

In this study, the effect of fuel type; gasoline or natural gas on the energy and exergy balance as well as the performance of spark ignition engine was experimentally investigated. The experiments were conducted using a four cylinder, naturally aspirated CNG–gasoline bi-fuel engine at wide open throttle (WOT) operating condition. The results showed that when engine was fed with gasoline, the output power was higher than that of gaseous fuel by 4.2 kW on average throughout the engine speed range.
Thermal efficiency of the engine with natural gas was higher than that of the gasoline by approximately
5.4% throughout the engine speed range. In addition, CNG fuel showed higher exergetic efficiency than
gasoline, and based on these results second law efficiency of CNG engine was higher than that of gasoline
engine by 3.18% on average. This was largely due to combustion temperature increase in CNG case. For all
operating points, the percentage of energy and exergy transfer through exhaust gases and the cooling system
in gasoline are lower than CNG. However the destructed exergy of gasoline was higher than CNG by
about 5.8%, averagely.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 02 Nov 2015 01:50
Last Modified: 27 Jul 2016 00:52
Uncontrolled Keywords: natural gas fueled engine; heat balance; energetic and exergetic efficiency; destructed energy
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
Identification Number or DOI: 10.1016/j.fuel.2015.05.067
URI: http://eprints.usq.edu.au/id/eprint/27778

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