Experimental investigation of thermal balance of a turbocharged SI engine operating on natural gas

Gharehghani, A. and Koochak, M. and Mirsalim, M. and Yusaf, Talal (2013) Experimental investigation of thermal balance of a turbocharged SI engine operating on natural gas. Applied Thermal Engineering, 60 (1/2). pp. 200-207. ISSN 1359-4311

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Abstract

This paper experimentally investigates the thermal balance and performance of a turbocharged gas spark ignition engine. The First Law of Thermodynamics was used for control volume around the engine to compute the output power, transferred energy to the cooling fluid, exhaust gases and also unaccounted losses through convection and radiation heat transfer. Thermal balance tests were performed for various operational conditions including full
and half loads and different cooling fluid temperatures. Results indicate that by increasing engine load and coolant
temperature, the percentage of transferred energy to the exhaust gases increased while the percentage of coolant
energy decreased. Also, experimental data reveals that using gaseous fuel and a turbocharger (TC) in the engine
leads to 4.5% and 4% more thermal efficiency than gasoline and natural aspirated (NA), respectively. Also, second law analysis reveals that using a turbocharger leads to a 3.6% increase in exergetic efficiency of the engine, averagely. Based on experimental results, an empirical correlation was suggested for computing the energy of exhaust gases which shows good agreement with the experimental data for the majority of operating conditions.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited, 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: 10 Jul 2013 04:48
Last Modified: 27 Apr 2017 01:56
Uncontrolled Keywords: thermal balance; gas SI engine; energy of exhaust gas; turbocharger; exergetic efficiency
Fields of Research : 02 Physical Sciences > 0203 Classical Physics > 020304 Thermodynamics and Statistical Physics
09 Engineering > 0902 Automotive Engineering > 090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
09 Engineering > 0915 Interdisciplinary Engineering > 091502 Computational Heat Transfer
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.applthermaleng.2013.06.029
URI: http://eprints.usq.edu.au/id/eprint/23702

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