Effect of Diesel Soot Deposition on the Performance of Exhaust Gas Recirculation Cooling Devices

2004 ◽  
Author(s):  
R. Zhang ◽  
F. Charles ◽  
D. Ewing ◽  
J.-S. Chang ◽  
J. S. Cotton
Keyword(s):  
Exhaust Gas Recirculation ◽  
Diesel Soot ◽  
Exhaust Gas ◽  
Soot Deposition ◽  
Cooling Devices ◽  
Gas Recirculation

Comparison of the effect of soot deposition on the flow and thermal characteristics of finned-plate-type and shell-and-tube-type exhaust gas recirculation cooling devices

2009 ◽  
Vol 223 (8) ◽  
pp. 1093-1100
Author(s):  
F Charles ◽  
D Ewing ◽  
J S Cotton ◽  
I E Gerges ◽  
J-S Chang
Keyword(s):  
Reynolds Number ◽  
Friction Factor ◽  
Reynolds Numbers ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Soot Deposition ◽  
Operational Characteristics ◽  
Shell And Tube ◽  
Gas Recirculation ◽  
Plate Type

Experiments were conducted to characterize the effect that diesel soot deposition has on the operational characteristics of a finned-plate-type compact exhaust gas recirculation (EGR) cooling device for Reynolds numbers from approximately 900 to 1200, typical of the values used in EGR applications. The results show that the Colburn j factor did not change significantly during diesel exhaust gas exposure for 5h at the lower Reynolds number, but the j factor and friction factor changed by 30–40 per cent during exposure for 5h at the Reynolds number of 1200. The Colburn j factor and friction factor for the plate-type device changed more slowly than those results for shell-and-tube heat exchangers at Reynolds numbers of 7000–9000, typical of the values used for these devices in EGR applications. Thus, the results show that the finned-plate-type compact heat exchanger operational characteristics should be less affected by soot deposition than the shell-and-tube devices in EGR applications.

scholarly journals Characterization of Soot Deposition and Particle Nucleation in Exhaust Gas Recirculation Coolers

2012 ◽  
Vol 46 (12) ◽  
pp. 1328-1336 ◽  
Author(s):  
Anil Singh Bika ◽  
Alok Warey ◽  
David Long ◽  
Sandro Balestrino ◽  
Patrick Szymkowicz
Keyword(s):  
Exhaust Gas Recirculation ◽  
Particle Nucleation ◽  
Exhaust Gas ◽  
Soot Deposition ◽  
Gas Recirculation

Propensity of Soot Deposition in a Rectangular Exhaust Gas Recirculation Cooler Using Kalman Filter

2015 ◽  
Vol 137 (12) ◽  
Author(s):  
Alireza Mirsadraee ◽  
M. Reza Malayeri
Keyword(s):  
Kalman Filter ◽  
Diesel Engines ◽  
Exhaust Gas Recirculation ◽  
Operating Conditions ◽  
Exhaust Gas ◽  
Process Noise ◽  
Soot Deposition ◽  
Noise Covariance ◽  
Egr Cooler ◽  
Gas Recirculation

The detection of fouling in exhaust gas recirculation (EGR) coolers of diesel engines should be fast and accurate. This would facilitate deciding an effective strategy to combat fouling and to prolong the lifetime of EGR coolers. In the present study, the propensity of soot deposition in a rectangular EGR cooler is modeled using Kalman filters. Noises, coherent feature of many deposition processes which can be resulted from measurement sensors such as thermocouples or incidental deposit flake-off, are also considered in the model. The Kalman filter minimizes the estimation error covariance by considering the measurement and process noise covariance matrices while it can simultaneously handle the noisy data. The results are characterized with measurement process noise covariance. The relation between these two defines the smoothness and shape of the estimated trend of fouling resistance. Comparisons of the experimental data and the resultant model confirmed the usefulness of the applied method for various operating conditions of an EGR cooler prone to particulate deposition of soot particles. The paper proceeds with the impact of such models in monitoring fouling and taking an appropriate mitigation approach in diesel engines.

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