Experimental Exploration of Effect of Hydrogen Enrichment on the Performance and Emissions of Dual Fuel Diesel Engine Equipped with CRDI by Varying Injection Duration

Abstract

The hydrogen due to its carbonless structure is considered as a potential supplement fuel in near future for dual-fuel Internal Combustion engines. It reduces the burden of energy imports and reduces carbon containing tailpipe emission, thereby protecting the environment. Hydrogen has inimitable characteristics because of carbonless structure which is considered as better alternative fuel compared to other available options, for example, liquefied petroleum gas, compressed natural gas, etc. In the presented study, investigation was conducted using hydrogen gas in dual-fuel method in single-cylinder CI engine. Hydrogen fuel was inoculated in intake manifold for different injection duration while injecting diesel into combustion chamber directly. The performance of engine is compared with baseline diesel performance at varying injection duration. Experimental observations demonstrated the performance improvement and exhaust emissions using hydrogen enrichment technique. The brake thermal efficiency observed to be improved by 3.17%, and brake specific energy consumption reduces by 10.81% at fully loaded condition for hydrogen gas injection duration of 6 ms as that of baseline diesel performance. Improvement is seen in performance parameters as well as in emissions also, hydrocarbon reduces by 68.18%, and carbon dioxide reduces by 43.33% at full load condition with same injection duration of 6 ms. It was experiential that due to homogeneous mixing of hydrogen with air leads to complete combustion of fuels with lesser emissions. The current study proved that hydrogen enrichment is a potential technology which could be used in compression ignition engines to improve performance and lessening emissions without any major modification in hardware of basic diesel engine.