Exergy analysis in a low heat rejection IDI diesel engine by three dimensional modeling

2013 ◽  
Vol 38 (6) ◽  
pp. 791-803 ◽  
Author(s):  
S. Jafarmadar ◽  
R. Tasoujiazar ◽  
B. Jalilpour
Keyword(s):  
Diesel Engine ◽  
Exergy Analysis ◽  
Three Dimensional ◽  
Heat Rejection ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling

scholarly journals Three dimensional modeling of combustion process and emission formation in a low heat rejection indirect injection diesel engine

2014 ◽  
Vol 18 (1) ◽  
pp. 53-65 ◽  
Author(s):  
S. Jafarmadar
Keyword(s):  
Diesel Engine ◽  
Combustion Process ◽  
Three Dimensional ◽  
Heat Rejection ◽  
Full Load ◽  
Engine Efficiency ◽  
Three Dimensional Modeling ◽  
Full Load Operation ◽  
Computational Fluid Dynamics Cfd ◽  
Comparison Of The Results

Higher heat losses and brake specific fuel consumption (BSFC) are major problems in an indirect injection (IDI) diesel engine, which can be overcome by means of low heat rejection (LHR) concept. This concept is based on the approach of insulating of piston and liner of main chamber in IDI engine. At the present work, the combustion process and emission formation in baseline and LHR engines are studied by a Computational Fluid Dynamics (CFD) code at four different loads (25%, 50%, 75% and 100%) in maximum torque engine speed 730rpm. The numerical results for the pressure in cylinder and emissions for baseline engine at full load operation are compared to the corresponding experimental data and show good agreement. The comparison of the results for two cases show that when the load increases from 25% to 100% in 25% steps, heat loss in LHR engine decrease 40.3%, 44.7%,44.6% and 45.2%, respectively. At full load operation in LHR engine, NOx and Soot emissions decrease 13.5% and 54.4%, respectively and engine efficiency increases 6.3% in comparison to baseline engine.

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