Experimental investigation of performance and emissions of CRDI diesel engine in dual fuel mode by hydrogen induction and diesel injection coupled with exhaust gas recirculation

Abstract

Abstract IC engines are the main resources of power in our daily life particularly in transportation, agricultural sectors and power generation. However, faster depletion of petroleum resources and environmental issues raised because of abundant use of it and are the driving force behind the search for replacement of petroleum products with newer reliable alternate fuels. In this point of view, hydrogen is the most promising alternate fuels because of its cleaner combustion characteristics to resolve the earlier stated issues as being the best renewable energy resource. In the current research work, the supplementary fuel used is hydrogen which was injected inside the intake manifold by solenoid type of hydrogen injector whereas diesel is directly injected inside the engine cylinder. The prime intention of current work is to replace the diesel energy share with hydrogen energy in single cylinder CRDI equipped diesel engine and reduction of Oxides of Nitrogen emission which was resulted due to maximum hydrogen energy share during combustion at higher flow rate using exhaust gas recirculation technique. The experimentation was carried out on single-cylinder 4\xa0S water cooled CRDI equipped engine. The effect of hydrogen addition with use of various flow rates of exhaust gas recirculated on engine performance along-with emission parameters were investigated at different loading conditions of engines. The hydrogen enriched dual fuel mode of operation together with exhaust gas recirculation technique resulted in improved performance as well as emissions factors of CRDI diesel engine in comparison with neat diesel except NOx which could be further reduced by cooled maximum mass flow rate of EGR which can be employed is suggested.