Double Boost Combustion: Elevating CI Engine Output with Hydrogen Green Fuels

Résumé fourni par la source

Rising energy demand and stringent emission regulations have intensified the search for sustainable fuels for compression ignition engines. This study experimentally evaluated the performance, combustion, and emission characteristics of algae biodiesel–diesel blends. Among the tested fuels, A20 emerged as the optimum blend, achieving a brake thermal efficiency of 31% with lower emissions than diesel. Subsequently, A20 was enhanced using TiO₂ nanoparticles, clove antioxidant, and hydrogen enrichment (3.33 to 9.25 L/min). Hydrogen addition significantly improved combustion owing to its high flame speed and superior diffusivity. The highest brake thermal efficiency (36%) and mechanical efficiency (75%) were obtained at 6.25 L/min hydrogen, while brake specific fuel consumption decreased to 0.29 kg/kWh. Combustion analysis revealed higher peak cylinder pressure and heat release rate, indicating improved combustion efficiency. Furthermore, hydrogen enrichment reduced CO, HC, and smoke emissions by 16%, 15%, and 5%, respectively. Despite a slight increase in NO emissions, the combined use of algae biodiesel, TiO₂ nanoparticles, antioxidants, and hydrogen demonstrated substantial potential for enhanced and more efficient engine operation.

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