An experimental investigation of the effects of hydrogen and water steam injection on diesel engine performance and exhaust emissions

Accelerated search for alternative fuels in internal combustion engines are being carried out due to the fact that fossil fuels used today are rapidly depleted and pollute the environment. In this context, the engine performance, combustion and emission characteristics of diesel-hydrogen-water vapor mixtures having different percentages were investigated experimentally mainly focusing on reducing exhaust emissions from diesel engines. Experimental study was carried out in the Antor 4LD 820 LY3 diesel engine with single cylinder, four stroke, water cooled. Fuel mixtures were tested under different loads and speeds. Hydrogen injection in diesel engines has caused an increase in the engine torque and engine power as a result of the flame velocity, which provides more complete combustion. Hydrogen, water vapor and hydrogen + water vapor injection increased engine torque according to the standard diesel data at 1500, 1000 and 2500 rpm 3.18%, 0.35%, 0.22% respectively. Maximum engine power increased by 3.48% and 3.63% at 2000 rpm with all hydrogen and water vapor injection under the same conditions. Specific fuel consumption decreased with hydrogen injection, with water vapor and with hydrogen + water vapor injection slightly increased. The lowest TAT decreased by 0.15% according to standard diesel data at 307.17 g / kW.h at 1500 rpm. The lowest BSFC at 307.17 g / kW.h at 1500 rpm decreased by 0.15% compared to standard diesel data. The lowest CO, HC and NOx were obtained as 900.5 ppm at 2500 rpm with hydrogen injection, 2500 rpm at 146 ppm with water vapor injection and 459.5 ppm at 2500 rpm with hydrogen injection respectively