선박용 탈질설비의 구성 및 공극률에 따른 배기 유동특성

Abstract

From 1 January 2016, new vessels navigating the Emission Control Area(ECA) must satisfy the Tier III emissions regulations. The SCR system should be operated in the ECA, and the SCR system should not be operated in the other areas. However, outside the ECA, Tier II emission regulations must be satisfied. The purpose of this study is to compare the CFD flow analysis and the experimental data on the porosity, exhaust gas flow rate, pressure distribution and temperature distribution of the De-NOx catalyst varying to configuration change of the De-NOx system for the installation of the De-NOx system in the Kaya ship generator engine The result is as follows. 1) The pressure and temperature changes were the most stable as the porosity of the De-NOx catalyst became near to 0%, and the pressure and temperature changes were larger as the porosity was near to 100%. 2) The De-NOx system Inlet Exhaust gas The slower the flow rate, the less the pressure and temperature change. The pressure and temperature changes were larger as the flow velocity increased. 3) The more stable the pressure and temperature distribution in the whole piping, the better the shape. Therefore, Case 2 configuration is the most stable design. 4) Comparisons between experimental and analytical values of differential pressure by section were maximum 20 Pa. However, it can be seen that the experimental value and the interpretation value are the same in most sections. 5) Comparisons of the temperature distributions of the experimental and analytical values are mostly the same at 340 ℃. However, in the urea injection period, it is 320 degrees, which is 20 ℃ lower than the analytical value.