New Design for Efficient Diesel Particulate Trap Regeneration
Document Type
Article
Publication Date
1-2004
Department
Department of Chemical Engineering
Abstract
Using numerical simulations shows that particulate trap regeneration does not occur below a certain critical inlet temperature, 679 K, for a typical diesel exhaust mass flow rate of 0.0523 kg/s. A new bypass design for particulate trap regeneration has been studied, where the exhaust flow is divided into several channels, which results in a smaller flow rate in each particulate filter. This reduces the critical inlet temperature by 20 K to 40 K, depending on the number of channels, and allows for improved regeneration efficiency with low electric energy consumption. In addition, a zero-order analytical estimate for the ignition time is also developed, given by u ig = 2.50/ξ + ln|ri| - 0.344, where uig is a dimensionless ignition time, ri is a reduced temperature, and ξ depends upon feed temperature, flow rate, oxygen concentration, and initial deposit thickness. An optimal design using three bypass channels is obtained by theory and simulation.
Publication Title
AIChE Journal
Recommended Citation
Zheng, H.,
&
Keith, J.
(2004).
New Design for Efficient Diesel Particulate Trap Regeneration.
AIChE Journal,
50(1), 184-191.
http://doi.org/10.1002/aic.10017
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3465