Effect of Oxy hydrogen (HHO) gas on energy, exergy, and sustainability analysis of a diesel engine fueled with palm oil biodiesel

Abstract

Various types of alternative fuels and their additives have undergone extensive investigation to analyze their effects on diesel engine performance. The aim of this study is to comprehensively evaluate the effects on performance and sustainability while employing blends of palm oil biodiesel and diesel, together with the introduction of oxyhydrogen (HHO) gas, in a diesel engine. The objectives include evaluating energy, exergy and sustainability parameters in order to ascertain the effectiveness of certain fuel mixtures. The study examined five different fuel mixtures: PB0, PB10, PB20, PB10HHO and PB20HHO. The HHO gas was injected into the cylinder alongside the air at a flow rate of 0.3 LPM. The primary results indicate significant enhancements in energy and exergy efficiency when HHO gas is used in conjunction with palm oil biodiesel, resulting in gains of up to 1.52% and 1.43%, respectively, compared to using biodiesel blends alone. In addition, the introduction of HHO gas resulted in a drop of up to 4.58% in brake-specific fuel consumption (BSFC). The use of biodiesel blends in conjunction with HHO gas led to a noteworthy decrease of up to 11.4% in carbon dioxide (CO2) and 5.7% in hydrocarbon (HC) emissions. Nevertheless, there was a notable rise of up to 9.56% in nitric oxide (NO) emissions. With the HHO-supplied condition, the combination was shown to have up to a 2.05% better sustainability index. The PB10HHO and PB20HHO blends provide improved performance when compared to pure biodiesel blends and conventional diesel. This study offers a unique approach to increasing diesel engine performance through the synergistic usage of biodiesel blends and HHO gas.