Simulation of the harmful emissions formation in the exhaust gases of marine diesel of multi-fuel systems

Abstract

Currently, the world community is increasingly struggling with harmful effects on the environment, the biosphere and the atmosphere in various fields of industry. One of the pollutants is marine transport. The main type of environmental pollution from marine power plants is harmful emissions of CO, CO2, NO sulfur compounds and other components contained in diesel exhaust gases. The main regulatory document determining the compliance of marine power plants with international environmental requirements is the international convention MARPOL 73/78, developed by the International Maritime Organization (IMO). One of the ways to solve this problem is the use of additional components for fuels on ships, such as water, hydrogen, natural gas, biodiesel, dimethyl ether, ethyl alcohol, etc. In order to pre-calculate the effectiveness of any of the methods for reducing harmful emissions, a simulation of combustion processes in a marine diesel engine when running on diesel fuel with and without the addition of dimethyl ether is carried out. In this study, the AVL Fire program, which is included in the AVL software package and allows you to get visual results on the formation of combustion products in the diesel cylinder, the distribution of temperature flows, soot formation, etc., is used. The 3NVD24 marine diesel engine, which is equipped with the necessary measuring complex for conducting practical research with the possibility of experimental confirmation of the computer modeling results, is used as a prototype for the analysis. Based on the model calculations, various factors of the harmful compounds formation during combustion are analyzed.