Environmental indicators of dual-fuel hydrogen engine

Abstract

Hydrogen is considered as a promising gas engine fuel for diesel engines. The problems that occur when converting engines to work on hydrogen are presented. Reliable ignition of hydrogen in the engine is achieved by implementing a two-fuel cycle. In this case, hydrogen ignites from the diesel fuel combustion. Calculations of diesel fuel and hydrogen supply effect on the workflow of a dual-fuel engine of the D-245 type were realized. The main indicators of the engine are calculated when the hydrogen supply changes from 0 to 80%. A criterion characterizing the total toxicity of engine exhaust gases is proposed. The optimal supply of hydrogen was 40%. With such a supply of hydrogen, there was a decrease in the smokiness of exhaust gases by 53%, carbon dioxide emissions by 44%, but the emission of nitrogen oxides increased by 27%. With an increase in the supply of hydrogen from 0 to 40%, the maximum calculated effective performance of engine increased by 7.1%.