Browse > Article
http://dx.doi.org/10.7464/ksct.2019.25.2.151

A Study on the Flow Uniformity and Characteristics of Exhaust gas in Diesel Particulate Filter/Diesel Oxidation Catalyst of Ship Diesel Reduction System by Computational Fluid Dynamics  

Kim, YunJi (Department of Environment-Energy Engineering, The University of Suwon)
Han, Danbee (Department of Environment-Energy Engineering, The University of Suwon)
Baek, Youngsoon (Department of Environment-Energy Engineering, The University of Suwon)
Publication Information
Clean Technology / v.25, no.2, 2019 , pp. 153-160 More about this Journal
Abstract
As air pollution becomes more serious due to the increased number of diesel vessel operations, ship regulations on harmful emissions strengthen. Therefore, the development of a diesel exhaust after-treatment system for ships is required, and the higher the flow uniformity of the exhaust treatment system, the higher the treatment efficiency. With the computer software ANSYS Fluent, pressure drop and flow uniformity were used in this study to simulate flow rate with and without a baffle in both a Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) system. The system pressure drop was found to be 38 to 40 mbar in the existing system condition, and the flow uniformity was approximately 84 to 92% at the inlet and outlet of the DOC. When the baffle was installed inside the system, the pressure increased and the flow uniformity was lowered due to an increase in flow rate. When the exhaust gas flow was reduced by 50% from $7,548kg\;h^{-1}$ to $3,772kg\;h^{-1}$, the flow uniformity at the inlet and outlet of the DOC increased by approximately 1 to 3% due to the low flow rate. In the case of DPF, the flow uniformity of exhaust gas was 98 to 99% because the uneven flow proceeded after uniformly flowing from the DOC.
Keywords
Ship Diesel Reduction System; Computational Fluid Dynamics; Flow Uniformity; Pressure Distribution;
Citations & Related Records
연도 인용수 순위
  • Reference
1 IMO, "Third IMO greenhouse gas study," International Maritime Organization (2014).
2 IMO, "Report of the marine environment protection committee on its' fifty-eighth session - revised MARPOL annex VI," International Maritime Organization (17 October, 2008).
3 IMO, "Report of the marine environment protection committee on its' fifty-eighth session - revised NOx technical code," International Maritime Organization (17 October, 2008).
4 Choi. B. K., and Cho. J. D., "Study on the Improvement of Uniformity of Inlet Velocity in Exhaust After-treatment System for System for Heavy Duty Engine," Korean Society of Automotive Engineers Conference, 357-360 (2002).
5 Jeong, S. Y., Lee. W., Lee. G. S., Kim. K. H., Bae. S. H., and Kim. H. S., "A Study on Flow Characteristics in Diesel Particle Filter for Heavy-duty Diesel Engine", Korean Society of Automotive Engineers Conference, 280-284 (2006).
6 Lemme, C., and Givens, W., "Flow Through Catalytic Converters - An Analytical and Experimental Treatment," SAE Technical Paper 740243 (1974).
7 Johnson, W., and Chang, J., "Analytical Investigation of the Performance of Catalytic Monoliths of Varying Channel Geometries Based on Mass Transfer Controlling Conditions," SAE Technical Paper 740196 (1974).
8 Lai, M.-C., Kim, J.-Y., Cheng, C.-Y., Li, P., Chui, G., and Pakko, J. D., "Three-Dimensional Simulations of Automotive Catalytic Converter Internal Flow," SAE Technical Paper 910200 (1991).
9 Baxendale, A. J., "Computational Fluid Dynamics in Exhaust System Design and Development," 94 Interanional E/G Design, Sterling Publication, Ltd., 126-130 (1994).
10 Weltens, H., Bressler, H., Terres, F., Neumaier, H., and Rammoser. D., "Optimisation of Catalytic Converter Gas Flow Distribution by CFD Prediction," SAE Technical Paper 930780 (1993).
11 Ahn. J. Y., Ku. J. H, Park. J. K., and Kim. J. W., "A Study on the Pressure Drop and Flow Characteristics depending upon the inlet.Outlet Geometry of Catalytic Converter," KSAE 81-86 (2007).