Title of article :
Experimental investigation of thermal balance of a turbocharged SI engine operating on natural gas
Author/Authors :
Gharehghani، نويسنده , , A. and M.Koochak and Mirsalim، نويسنده , , M. and Yusaf، نويسنده , , Talal، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
8
From page :
200
To page :
207
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.
Keywords :
Turbocharger , Exergetic efficiency , Thermal balance , Energy of exhaust gas , Gas SI engine
Journal title :
Applied Thermal Engineering
Serial Year :
2013
Journal title :
Applied Thermal Engineering
Record number :
1906177
Link To Document :
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