An experimental investigation of effect on diesel engine performance and exhaust emissions of addition at dual fuel mode of hydrogen

Hydrogen effects on the diesel engine performance and emissions

Hydrogen assisted diesel combustion

This paper provides a comprehensive review and critical analysis of the latest research results in addition to an overview of the future challenges and opportunities regarding the use of hydrogen to power internal combustion engines (ICEs). The experiences and opinions of various international research centers on the technical possibilities of using hydrogen as a fuel in ICE are summarized. The advantages and disadvantages of the use of hydrogen as a solution are described. Attention is drawn to the specific physical, chemical, and operational properties of hydrogen for ICEs. A critical review of hydrogen combustion concepts is provided, drawing on previous research results and experiences described in a number of research papers. Much space is devoted to discussing the challenges and opportunities associated with port and direct hydrogen injection technology. A comparison of different fuel injection and ignition strategies and the benefits of using the synergies of selected solutions are presented. Pointing to the previous experiences of various research centers, the hazards related to incorrect hydrogen combustion, such as early pre-ignition, late pre-ignition, knocking combustion, and backfire, are described. Attention is focused on the fundamental importance of air ratio optimization from the point of view of combustion quality, NOx emissions, engine efficiency, and performance. Exhaust gas scrubbing to meet future emission regulations for hydrogen powered internal combustion engines is another issue that is considered. The article also discusses the modifications required to adapt existing engines to run on hydrogen. Referring to still-unsolved problems, the reliability challenges faced by fuel injection systems, in particular, are presented. An analysis of more than 150 articles shows that hydrogen is a suitable alternative fuel for spark-ignition engines. It will significantly improve their performance and greatly reduce emissions to a fraction of their current level. However, its use also has some drawbacks, the most significant of which are its high NOx emissions and low power output, and problems in terms of the durability and reliability of hydrogen-fueled engines.

/pdf/a-comprehensive-overview-of-hydrogen-fueled-internal-40yusorbin.pdf

A Comprehensive Overview of Hydrogen-Fueled Internal Combustion Engines: Achievements and Future Challenges

Experimental comparison of pure hydrogen and HHO (hydroxy) enriched biodiesel (B10) fuel in a commercial diesel engine

Combustion analysis on a DI diesel engine with hydrogen in dual fuel mode

Hydrogen is expected to be one of the most important fuels in the near future for solving not only the problem of greenhouse emissions but also carbon monoxide and unburnt hydrocarbon thereby protecting the environment in addition to, saving conventional fuels. In the present experimental work hydrogen was used in the dual fuel mode with diesel as an ignition source. Hydrogen was injected in the intake port and diesel was injected directly into the combustion chamber. The injection timing and injection duration for hydrogen injection was controlled by an Electronic Control Unit (ECU). An hydrogen injector fitted on the intake port was used to inject the hydrogen fuel during the intake stroke. For experiments a single cylinder, AV1 Kirloskar, DI Diesel engine was used. The hydrogen injection timing was fixed at suction TDC and injection duration was fixed at 30 ° , 60 ° , and 90 ° crank angles. The injection timing of diesel was kept constant at 23 ° BTDC. Results show that, the NO X emission decreases from 1806 ppm for diesel to 1690 ppm at full load for 30o injection duration for hydrogen and 1606 ppm for 90o injection duration in the dual fuel mode. The smoke reduces significantly from 4.06 BSN for diesel operation at full loads compared to 2.1 BSN for hydrogen operation with 90o injection duration with a further reduction in smoke to 1.2 BSN with 30o and 60o injection duration.

/pdf/studies-on-port-injected-hydrogen-in-a-dual-fuel-d-i-diesel-33srb8m5e9.pdf

Studies on Port Injected Hydrogen in a Dual Fuel D.I. Diesel Engine

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Combustion analysis on a DI diesel engine with hydrogen in dual fuel mode

Studies on Port Injected Hydrogen in a Dual Fuel D.I. Diesel Engine