Computational Study of the Working Process of a Dual-Fuel Hydrogen Engine

Abstract

from alternative raw materials. Hydrogen is considered as a promising alternative fuel. Using the Diesel-RK software package, computational studies of the effect of hydrogen supply on the workflow of a D-245 gas-diesel engine were carried out. The diesel cycle of the engine and its gas-diesel cycle with hydrogen supplies equal to 5, 10, 20, 40, 60 and 80 % are calculated (taking into account the difference in the heat of combustion of diesel fuel and hydrogen). The maximum equivalent efficiency of the diesel engine is achieved when 40 % hydrogen is supplied to the combustion chamber. In this case, compared to working only on petroleum diesel fuel, the effective efficiency of diesel increased by 6.7 %. The transition of diesel engines from petroleum diesel fuel to work with the addition of hydrogen in an amount of 40 % is accompanied by a decrease in the specific emission of carbon dioxide by 44 %, the smokiness of exhaust gases by 53 %. However, an increase in the content of nitrogen oxides in exhaust gases by 27 % was noted.