Abstract:

Now the world is filled with automobiles of various types from a small two-wheeler to huge trucks, but the soul of those engines are the fuels what we are using. From the olden days onwards we use only the fossil fuels, we are using still now but the major disadvantage of those fuels are the pollution caused by them and their availability. Now our world is under the pressure of pollution, though there may be many reasons for pollutions, the major amount was contributed by automobiles and this fossil fuel are non-renewable resource and we know that this would available only for 30-40 years. So our scientists are searching for renewable resource as fuel for engines and moreover pollution free.

This paper deals about using liquid nitrogen as a fuel for the future world. Yes of course using of nitrogen which is very abundant (78%) in our atmosphere. The technique of liquefying the nitrogen gas by the process of “CRYOGENISIS” and using it as a fuel. The major advantage of using this fuel is pollution free (ZERO EMISSION VEHICHLE). Since the exhaust of this engine is again a nitrogen gas. So within few years we can see the automobiles that are propelled by liquid nitrogen and we can make a pollution free world.

Abstract:

Hydrogen is seen as a viable fuel alternate and its development work is carried-out under two sects, viz., fuel cells and Hydrogen IC Engines. While the researches on Fuel cell technology have borne fruit through co-ordination and integration, Hydrogen IC Engine researches are isolated to discrete domains.

This paper is an analysis paper focusing on evaluation of Hydrogen as a fuel for IC Engine. Besides introducing Hydrogen as IC Engine fuel, the technical feasibilities of various technologies under research have been analyzed and a theoretical IC Engine working on Hydrogen has been evolved. The right combination of features of the engine has been selected through the available literature on this subject and expert opinions. The various areas analyzed include properties of Hydrogen, combustion properties of hydrogen, design and Modeling aspects of Hydrogen IC Engines. Further a discussion on various applications of this technology has been done. This work of analysis leaves openings for continuation as in the form of simulations and practical analyses.

Abstract:

In a day by day price exacerbation of petroleum, jatropha bio-fuel can be used in lace of fossil fuel. While the diesel engine using this fuel, it is necessary that the life time and the safety of the nozzle to be safeguarded. For the better data comparison, numerical method of analysis (CFD) is required to compare the experimental values in terms of pressure, velocity, stresses on walls and strains. The flow pattern of 100% diesel in fuel injector is studied with experimental values in CFD and compared with the blend of 20% jatropha and 80% diesel flow pattern to find the optimum design. Then the optimum design is tested in the running conditioned diesel engine. In this paper, the results of the analysis are to be presented only from the point of “Optimum design spray pattern of 20 % bio-fuel blend with 80 % diesel is comparable to spray pattern of 100 % diesel in the fuel injector”.

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