Selective catalytic reduction (SCR) system has been proven to be an effective technology for the removal of NOx emitted from marine diesel engines. In order to comply with stringent International Maritime Organization (IMO) Tier III NOx emission regulations, a number of engine manufacturers have developed their own SCR systems. This paper focuses on modeling of an SCR reactor and developing model-based urea dosing control strategy. A mathematical model of SCR reactors has been established. Model-based control strategy relies on the three-state and one-state reactor models established to accomplish urea dosing algorithm and is promising in limiting excessive NH3 slip. The SCR reactor model is further used in a simulation for the purpose of developing model-based urea dosing control strategies. The simulation results show that the NO sliding mode control requires a massive prestudy of the NOx reduction capability of the catalyst in order to set an appropriate control objective for each operating condition. However, this calibration work can be omitted in the optimal control and NH3 sliding mode control, which mitigates the workload of the controller design. The optimal control strategy presents a satisfied control performance in limiting NH3 slip during transient state engine operating conditions.
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January 2019
Research-Article
Investigation on the Control Strategy for Marine Selective Catalytic Reduction System
Youhong Xiao,
Youhong Xiao
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
e-mail: xiaoyouhong@hrbeu.edu.cn
Harbin Engineering University,
Harbin 150001, China
e-mail: xiaoyouhong@hrbeu.edu.cn
Search for other works by this author on:
Hui Zhao,
Hui Zhao
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
Harbin Engineering University,
Harbin 150001, China
Search for other works by this author on:
Xinna Tian,
Xinna Tian
China Shipbuilding Power
Engineering Institute Co., Ltd.,
Shanghai 201206, China
Engineering Institute Co., Ltd.,
Shanghai 201206, China
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Wenyang Tan
Wenyang Tan
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
Harbin Engineering University,
Harbin 150001, China
Search for other works by this author on:
Youhong Xiao
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
e-mail: xiaoyouhong@hrbeu.edu.cn
Harbin Engineering University,
Harbin 150001, China
e-mail: xiaoyouhong@hrbeu.edu.cn
Hui Zhao
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
Harbin Engineering University,
Harbin 150001, China
Xinna Tian
China Shipbuilding Power
Engineering Institute Co., Ltd.,
Shanghai 201206, China
Engineering Institute Co., Ltd.,
Shanghai 201206, China
Wenyang Tan
College of Power and Energy Engineering,
Harbin Engineering University,
Harbin 150001, China
Harbin Engineering University,
Harbin 150001, China
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT,AND CONTROL. Manuscript received July 18, 2017; final manuscript received July 26, 2018; published online September 10, 2018. Assoc. Editor: Ming Xin.
J. Dyn. Sys., Meas., Control. Jan 2019, 141(1): 011005 (12 pages)
Published Online: September 10, 2018
Article history
Received:
July 18, 2017
Revised:
July 26, 2018
Citation
Xiao, Y., Zhao, H., Tian, X., and Tan, W. (September 10, 2018). "Investigation on the Control Strategy for Marine Selective Catalytic Reduction System." ASME. J. Dyn. Sys., Meas., Control. January 2019; 141(1): 011005. https://doi.org/10.1115/1.4041011
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