High Temperature Exhaust Gas Recirculation for Low NOx Emission in Solid Fuel MILD Combustion in Pilot-scale Combustion Furnace

2013 ◽  
Vol 30 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Sung-Hoon Shim ◽  
◽  
Sang-Hyun Jeong ◽  
Ji-Soo Ha
Keyword(s):  
High Temperature ◽  
Solid Fuel ◽  
Exhaust Gas Recirculation ◽  
Pilot Scale ◽  
Nox Emission ◽  
Exhaust Gas ◽  
Mild Combustion ◽  
Gas Recirculation ◽  
Low Nox Emission

Control-Oriented Physics-Based NOX Emission Model for a Diesel Engine With Exhaust Gas Recirculation

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Saravanan Duraiarasan ◽  
Rasoul Salehi ◽  
Anna Stefanopoulou ◽  
Siddharth Mahesh ◽  
Marc Allain
Keyword(s):  
Diesel Engine ◽  
Test Procedure ◽  
Flame Temperature ◽  
Exhaust Gas Recirculation ◽  
Nox Emission ◽  
Injection Timing ◽  
Exhaust Gas ◽  
Engine Control ◽  
Gas Recirculation ◽  
The Impact

Abstract Stringent NOX emission norm for heavy duty vehicles motivates the use of predictive models to reduce emissions of diesel engines by coordinating engine parameters and aftertreatment. In this paper, a physics-based control-oriented NOX model is presented to estimate the feedgas NOX for a diesel engine. This cycle-averaged NOX model is able to capture the impact of all major diesel engine control variables including the fuel injection timing, injection pressure, and injection rate, as well as the effect of cylinder charge dilution and intake pressure on the emissions. The impact of the cylinder charge dilution controlled by the engine exhaust gas recirculation (EGR) in the highly diluted diesel engine of this work is modeled using an adiabatic flame temperature predictor. The model structure is developed such that it can be embedded in an engine control unit without any need for an in-cylinder pressure sensor. In addition, details of this physics-based NOX model are presented along with a step-by-step model parameter identification procedure and experimental validation at both steady-state and transient conditions. Over a complete federal test procedure (FTP) cycle, on a cumulative basis the model prediction was more than 93% accurate.

Experimental Investigation of Diesel - Hydrogen Dual Fuel Direct Injection C.I. Engine with Exhaust Gas Recirculation

2015 ◽  
Vol 787 ◽  
pp. 697-701 ◽  
Author(s):  
R. Senthil Kumar ◽  
M. Loganathan
Keyword(s):  
Flow Rate ◽  
Combustion Engine ◽  
Direct Injection ◽  
Exhaust Gas Recirculation ◽  
Nox Emission ◽  
Exhaust Gas ◽  
Hydrogen Flow Rate ◽  
Hydrogen Flow ◽  
Inlet Manifold ◽  
Gas Recirculation

Hydrogen is a zero emission alternative gaseous fuel generally used in internal combustion engine with single fuel or duel fuel mode. In this work the Hydrogen is introduced in inlet manifold in addition to main diesel fuel used in the engine. The different flow rate of hydrogen fuel is used in this work are from 2 lpm to 10 lpm at 2 bar pressure. Here the single cylinder, direct injection, diesel engine with 1500 rpm rated speed is used for test. In addition to hydrogen, the exhaust gas also introduced in the inlet manifold with various percentages namely 10% and 20%. The engine is loaded with eddy current dynamometer .The engine performance and emissions of various combination of hydrogen flow rate and exhaust gas recirculation (EGR) were analyzed. The result showed that in 8 lpm hydrogen flow rate without EGR the BTE increased and BSFC decreased. At the same condition the HC, CO emissions reduced and NOx emission is increased. But NOx emission with 10% and 20% EGR is reduced.

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