Control Strategies for Peak Temperature Limitation in DPF Regeneration Supported by Validated Modeling

2007 ◽  
Author(s):  
G. C. Koltsakis ◽  
O. A. Haralampous ◽  
Z. C. Samaras ◽  
L. Kraemer ◽  
F. Heimlich ◽  
...  
Keyword(s):  
Control Strategies ◽  
Peak Temperature ◽  
Dpf Regeneration ◽  
Temperature Limitation

Effect of Peak Temperature Limitations on the Design of Processes with Cooled Tubular Reactors

2014 ◽  
Vol 12 (1) ◽  
pp. 191-203
Author(s):  
William L. Luyben
Keyword(s):  
Catalyst Deactivation ◽  
Tubular Reactor ◽  
Peak Temperature ◽  
Tube Length ◽  
Maximum Temperature ◽  
Coolant Temperature ◽  
Operating Variables ◽  
In Series ◽  
Temperature Limitation ◽  
The Impact

Abstract Maximum temperature limitations are usually encountered in exothermic catalytic reaction systems due to catalyst deactivation. Therefore, the peak temperature in a cooled tubular reactor can be constrained to some maximum limit. The peak temperature is a function of many design and operating variables such as reactor volume and heat-transfer area (number of tubes, tube diameter and tube length), coolant temperature, inlet reactant concentration, per-pass conversion and reactant feed distribution. These variables affect the design of both the reactor and the separation section of the plant. This paper explores the impact of this peak temperature limitation on the economic design of the entire process. The numerical example used is the production of cumene from benzene and propylene. Results show that costs increase as the peak temperature limitation decreases. Use of two cooled reactors in series with the limiting reactant split between the reactors is more economical than a single reactor.

Control Strategies for Safe Diesel Particulate Filter Uncontrolled Regeneration during Idle

2012 ◽  
Vol 614-615 ◽  
pp. 366-370
Author(s):  
Dan Wang ◽  
Zhong Chang Liu ◽  
Jing Tian
Keyword(s):  
Diesel Particulate Filter ◽  
Reaction Rate ◽  
Thermal Protection ◽  
Control Strategies ◽  
Particulate Filter ◽  
Exhaust Gas ◽  
Diesel Particulate ◽  
Idle Speed ◽  
Dpf Regeneration ◽  
Gas Recirculation

For diesel particulate filter (DPF) drop-to-idle uncontrolled regeneration, a regular regeneration is initiated following a vehicle stop while the engine switches to idle. The increase in oxygen concentration and the decrease in exhaust flow rate can result in a sharp exotherm in the filter and high temperature to damage the substrate. In this paper, control solutions for the idle thermal protection of the filter was proposed and validated experimentally. At high idle speed of 2200rpm, increasing exhaust gas recirculation (EGR) combined with intake throttling was a practical way to reduce available oxygen content to control the exothermal reaction rate. A much lower peak temperature was obtained for safe DPF regeneration during idle. The research would provide based information for optimizing the regeneration management strategy in order to avoid DPF failure in real world operation.

Adolescents' Use of Resource Control Strategies and Bullying Behaviors

2017 ◽  
Author(s):  
Kelly N. Clark ◽  
Nicole B. Dorio ◽  
Michelle K. Demaray ◽  
Christine K. Malecki
Keyword(s):  
Control Strategies ◽  
Resource Control ◽  
Bullying Behaviors

Book Review

2014 ◽  
Vol 11 (3) ◽  
pp. 387-390
Author(s):  
Antonina Levatino
Keyword(s):  
Control Strategies ◽  
Human Mobility ◽  
Diverse Range ◽  
Transnational Mobility ◽  
Migration Management ◽  
Nation States ◽  
Migration Control ◽  
Political Economic ◽  
Controversial Nature

Martin Geiger & Antoine Pécoud (eds.), Disciplining the Transnational Mobility of People, Palgrave Macmillan, 2013, 271 pp., (ISBN 978-1-137-26306-3).In the last decades a very diverse range of initiatives have been undertaken in order to intensify and diversify the ways human mobility is managed and restricted. This trend towards a ‘diversification’ of the migration control strategies stems from the increased awareness by the nation-states of the profoundly controversial nature of the migration management enterprise because of its political, economic, social and moral implications.

Comparison of Control Strategies Applied to Nonlinear Quarterly Car Passive Suspension System

2015 ◽  
Vol 8 (3) ◽  
pp. 203
Author(s):  
Muhammad Sani Gaya ◽  
Amir Bature ◽  
Lukman A. Yusuf ◽  
I. S. Madugu ◽  
Ukashatu Abubakar ◽  
...  
Keyword(s):  
Control Strategies ◽  
Suspension System ◽  
Passive Suspension ◽  
Passive Suspension System
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