Improvements of combustion, emissions and exergy in petrol engine using oxyhydrogen from different configurations

Abstract

Water electrolysis was used to create oxyhydrogen (HHO) in dry and wet electrolyzers at rates of 0.4 and 0.6 lpm, respectively. Engine performance, exergy, combustion, and emissions of petrol engine operating in dual fuel mode on gasoline and HHO were studied. The addition of hydroxy gas from dry and wet units increased thermal efficiency relative to petrol by 4% and 7.5%, respectively. The improvements in air-fuel ratios for wet and dry types were 15 and 7%, respectively, while the improvements in volumetric efficiency were 13 and 5.5%. For dry and wet cells about petrol fuel, the decreases in CO (13, 35%), CO2 (23, 37%), and HC concentrations (11, 23%) were displayed. By using HHO, dry and wet designs experienced improvements in cylinder pressure and heat release rate. When compared to gasoline fuel at full load, the fuel and exhaust exergy of dry and wet cells are respectively 33.4 and 36% lower and 9% and 13% lower. Exergetic efficiency of HHO gas from dry and wet cells were enhanced by 50 and 55%, respectively, regarding petrol. It is advised to use oxyhydrogen from dry electrolyzer in SI engine to improve performance and reduce emissions through better combustion and exergy.