Assessment of Combustion and Acoustic Characteristics of Scenedesmus dimorphus Blended With Hydrogen Fuel on Internal Combustion Engine

Abstract Biodiesel, which may be produced from crops, animal fat, as well as waste products from both industrial and residential sectors, is one of the alternative fuels that are utilized extensively. These biodiesels may either be used on their own or combined with regular diesel. Because biodiesels are becoming increasingly popular as a substitute for fossil fuels, the amount of attention paid to studying them has been growing steadily over the past few years. However, the results on the features of the noise and vibration are still missing, and much more emphasis has to be placed on the study conducted in that particular field. In this study, the combustion, noise, and vibration properties of Scenedesmus dimorphus microalgae biodiesel were investigated both with and without the provision of hydrogen. At the rate of 5 l/min, the supply of hydrogen was made available. Both B10 (10% of Scenedesmus dimorphus microalgae biodiesel and 90% pure diesel) and B20 (20% of Scenedesmus dimorphus microalgae biodiesel and 80% pure diesel) were employed as the biodiesel compositions. In addition, the source of hydrogen was made available for the diesel in its purest form as well as the two biodiesel mixes that remained. The fuels that were obtained consisted of neat microalgae blends containing 0% microalgae B0H5, 10% microalgae B10H5, and 20% microalgae containing B20H5. In this study, the performance of pure diesel was compared to the findings obtained from hydrogen-enriched fuel blends, simple biodiesel blends, and a combination of the two. Each and every experimental test was carried out using a diesel engine with a single-cylinder, water cooling, and four strokes. The tests were carried out with the load varying 25% in-between from 0% to 100%. Based on the findings, it was discovered that increasing the proportion of biodiesel fuel and adding hydrogen to the engine both contributed to a reduction in the amount of vibration and noise that was generated by the vehicle. The combustion qualities were also improved by the mixing of hydrogen and biodiesel as hybrid fuel.