가야호 SCR 시스템의 수치 유동해석과 실험결과 비교

Abstract

In order to regulate emissions from the ship sailing around the world by international agreement, it's regulations have tightened up recently by the maritime environment protection committee of International Maritime Organization. TIERⅠ was enforced in 2000, TIERⅡ was enforced in 2011 and TIERⅢ on only emission control area was enforced in 2016 according to the amendment MARPOL 73/78 convention for NOX. As the reduction aim at NOX emitted on TIERⅢ is to be decreased by 80% comparing with TIERⅠ, achievement in reduction of NOX by engine’s own technologies is hard. An SCR receives attention as realizable technology.

In previous research, flow analysis about SCR system in training ship KAYA at Pukyong national university was accomplished by CFD for optimal design. Urea injection and a chemical reaction were not considered. In this study, components like NH3, NO, O2, H2O, N2 and CO2, and temperature distribution of exhaust gas in the SCR system are analyzed by CFD to consider them. As the result, NH3, NO, and O2 are decreased but H2O, N2, and CO2 are increased after catalysis because urea solution is added and react with them. The temperature distribution by CFD is slightly different from the experimental data, it's a trend which increase and decrease are similar.