Bar and Plate EGR Cooler Simulation and Experimental Verification

2014 ◽  
Vol 543-547 ◽  
pp. 441-447
Author(s):  
Ping Song ◽  
Zhi Yong Hao ◽  
Wei Tao Zhang ◽  
Zhi Luo
Keyword(s):  
Turning Point ◽  
Simulation Method ◽  
Engine Simulation ◽  
Overall Heat Transfer Coefficient ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Egr Cooler ◽  
Plate Cooler ◽  
Analysis System ◽  
Experimental Values

In order to get further understanding of the performance of bar and plate cooler used in the heavy-duty diesel engine, simulation method was employed to study the key parameters and their relationships of the typical bar and plate EGR cooler. It was found that the turning point number of the plate was 13. In addition, an EGR cooler test and analysis system was built to verify the parameters of the modified cooler. It was found that the experimental values of outlet temperatures were about1.17% smaller than the calculated values averagely, while the overall heat transfer coefficient were 3.1% larger.

Application of Thermal Gas Mass Flow Meter in EGR Cooler Test and Analysis System

2014 ◽  
Vol 530-531 ◽  
pp. 225-232
Author(s):  
Ping Song ◽  
Zhi Yong Hao ◽  
Da Yuan Tao ◽  
Xiao Shuai Ren ◽  
Xue Dong Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Mass Flow ◽  
Outlet Temperature ◽  
Flow Meter ◽  
Overall Heat Transfer Coefficient ◽  
Egr Cooler ◽  
Analysis System ◽  
Experimental Values

This paper studied the principles of thermal gas mass flow meter. According to the car engine EGR cooler working principle, we found out a kind of heat dissipation gas mass flow meter to measure the mass flow quantity of the gas in the EGR cooler test and analysis system which is a newly applied invention patent. We analyzed various parameters of the gas mass flow meter suitable to the system. Meanwhile, in order to verify reliability of the thermal gas mass flow meter in the system, we adopted CFD method to simulate the EGR cooler by using empirical parameters, and collected several related sensor parameters of the EGR cooler in the condition that the inlet temperature was constantly at 368K while the coolant had 4 kinds of degrees. Combining heat empirical formula, we got the EGR cooler outlet temperature and the overall heat transfer coefficient. After comparing the calculated values of the gas path total EGR cooler outlet temperature and heat transfer coefficients with the experimental values, we found that the outlet temperature values of experiment were smaller than the calculated values by averagely 1.17%, while the average experimental values of the overall heat transfer coefficient were 3.1% larger than the calculated values. Thus, this type of mass flow meter has good stability in the newly applied Chinese patent EGR cooler performance test and analysis system.

Comparative Study of Diesel Oil and Biodiesel Spray Combustion Based on Detailed Chemical Mechanisms

2013 ◽  
Vol 136 (3) ◽  
Author(s):  
Junfeng Yang ◽  
Valeri I. Golovithcev ◽  
Chitralkumar V. Naik ◽  
Ellen Meeks
Keyword(s):  
Comparative Study ◽  
Diesel Oil ◽  
Exhaust Emission ◽  
Biodiesel Fuel ◽  
Combustion Mechanism ◽  
Engine Simulation ◽  
Constant Volume Combustion Chamber ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Lift Off

In the present work, a semidetailed combustion mechanism for biodiesel fuel was validated against the measured autoignition delay times and subsequently implemented in the fortÉ cfd engine simulation package (Reaction Design Inc., 2010, “fortÉ, FOR-UG-40102-1009-UG-1b,” Reaction Design Inc., San Diego, CA) to investigate the spray characteristics (e.g., the liquid penetration and flame lift-off distances of rapeseed oil methyl ester (RME) fuel in a constant-volume combustion chamber). The modeling results were compared with the experimental data. Engine simulations were performed for a Volvo D12C heavy-duty diesel engine fueled by RME on a 72 deg sector mesh. Predictions were validated against measured in-cylinder parameters and exhaust emission concentrations. The semidetailed mechanism was shown to be an efficient and accurate representation of actual biodiesel combustion phases. Meanwhile, as a comparative study, the simulations based on a detailed diesel oil surrogate mechanism were performed for diesel oil under the same conditions.

A Study of the Vapor- and Particle-Phase Sulfur Species in the Heavy-Duty Diesel Engine EGR Cooler

1998 ◽  
Author(s):  
Admir M. Kreso ◽  
John H. Johnson ◽  
Linda D. Gratz ◽  
Susan T. Bagley ◽  
David G. Leddy
Keyword(s):  
Diesel Engine ◽  
Particle Phase ◽  
Heavy Duty ◽  
Sulfur Species ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Egr Cooler

Impact of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine EGR Cooler Condensate

2008 ◽  
Vol 1 (1) ◽  
pp. 100-107 ◽  
Author(s):  
Michael Mosburger ◽  
Jerry Fuschetto ◽  
Dennis N. Assanis ◽  
Zoran Filipi ◽  
Heather McKee
Keyword(s):  
Diesel Engine ◽  
Heavy Duty ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Egr Cooler

Effect of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine Emissions and EGR Cooler Condensate

2010 ◽  
Author(s):  
Michael Smith ◽  
Zoran Filipi ◽  
Peter Schihl ◽  
Dennis Assanis
Keyword(s):  
Diesel Engine ◽  
Sulfur Content ◽  
Diesel Fuel ◽  
Size Spectrum ◽  
Heavy Duty ◽  
So2 Emissions ◽  
Heavy Duty Diesel Engine ◽  
Order Of Magnitude ◽  
Heavy Duty Diesel ◽  
Egr Cooler

Low-sulfur “clean” diesel fuel has recently been mandated in the U.S. market. However, quality of diesel fuel, particularly the sulfur content, varies significantly in other parts of the world. Due to logistical issues in various theaters of operation, the Army is often forced to rely on local fuel supplies, which exposes vehicles to diesel fuel or jet fuel (JP8) with elevated levels of sulfur. Currently, modern diesel engines typically use cooled Exhaust Gas Recirculation (EGR) to meet emissions regulations. Using high sulfur fuels and cooled EGR has potential to lead to EGR cooler fouling and corrosion of engine components. Therefore, an experimental study has been setup to investigate the EGR heat exchanger condensate in a heavy duty diesel engine running on JP-8 fuel doped with 3512 ppm of sulfur. Gas was sampled from the EGR cooler and analyzed. A Condensate Collection Device (CCD) was developed and setup according to a modified ASTM 3226-73T standard, to perform analysis of sulfur condensate species of SO2 and H2SO4 in the EGR system. Results have shown that SO2 values to have the highest concentration of gaseous sulfur species. SO2 is also shown to increase as sulfur content in JP-8 increases, but not by the same order of magnitude. Results have also shown low levels of H2SO4 from 2–5 ppm with negligible differences while varying sulfur content in JP-8, EGR levels of the engine, and condenser temperatures in the CCD. Due to suspicion that all sulfur has not been accounted for in experiments with the modified CCD, further experiments were performed using a Fourier Transform Infrared (FTIR) emissions bench for gaseous SO2 emissions and a Differential Mobility Spectrometer (DMS) for particulate size spectrum analysis. FTIR results yielded similar results for gaseous SO2 as the modified CCD with SO2 levels increasing as sulfur content in fuel increases but not by the same order of magnitude. While the results from the DMS have shown that increasing sulfur content in JP-8 will increase the particle sizes in the particle size distribution curve. This also translates to an increase in PM mass concentration in the exhaust stream when sulfur content is increased in JP-8 on an engine with and without EGR.

Turbocharging of a Heavy Duty Diesel Engine for a Specific Power and Performance Enhancement

2015 ◽  
Author(s):  
Kareem Emara ◽  
Ahmed Emara ◽  
Elsayed Abdel Razek
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Specific Power ◽  
Heavy Duty ◽  
Direct Injection Diesel Engine ◽  
Engine Simulation ◽  
Brake Power ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

Increase of the capacity of heavy duty diesel engines is of great interest in the way of power enhancement in many engine applications. Turbocharger is one of the most important ways used to increase the engine specific power. The present study aimed to develop an analytical model to simulate the performance and combustion characteristics of a direct injection diesel engine. This model depends on the basic conservation equations of continuity, momentum and energy as well as equation of state, these equations are solved together numerically by using two steps Lax-Wendroff scheme. To address this, a comprehensive computer “FORTRAN” code was developed and applied to study the performance and combustion characteristics of a six-cylinder, four stroke, direct injection, heavy duty diesel engine as a base engine and when its power upgraded by 15% using a turbocharger. This code is open source, preprocessor is user-friendly and very easy in work and will used at any time. The computed results are compared with the results obtained by applying the engine simulation DIESEL-RK software. But the DIESEL-RK solver may be run under the control of an external code. In that case the interface of the program includes input & output text files. Templates of these files are generated automatically. The developed model provides reasonable estimates and the experimental validation of the model show that an appropriate agreement between mathematical model, DIESEL-RK software, and the real measurements, in addition the capability of the model to predict satisfactorily the performance, and combustion characteristics of the direct injection diesel engine. Simulation study was also performed to compare the turbocharged engine with the naturally aspirated direct injection diesel engine. This study examined the engines for operating parameters like brake power and brake specific fuel consumption over the entire speed range and revealed that turbocharging offers higher brake power and lower brake specific fuel consumption values for most of the operating range. The results indicated that turbocharging offers marginally higher brake thermal efficiency and enhancing the engine performance.

scholarly journals Effects of renewable fuel and exhaust aftertreatment on primary and secondary emissions from a modern heavy-duty diesel engine

2021 ◽  
Vol 156 ◽  
pp. 105781
Author(s):  
Louise Gren ◽  
Vilhelm B. Malmborg ◽  
John Falk ◽  
Lassi Markula ◽  
Maja Novakovic ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Exhaust Aftertreatment ◽  
Heavy Duty ◽  
Renewable Fuel ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel
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