IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 02 | Feb-2015, Available @ http://www.ijret.org 388 GASOLINE-HYDROGEN OPERATED SI ENGINE AND ITS PERFORMANCE ANALYSIS N.S.Gandhi 1 , A.V.Kulkarni 2 , R.S. Jahagirdar 3 , M.S.Sawade 4 1 Assistant Professor, Mechanical Engineering Department, SYCET, Maharashtra, India 2 Associate Professor, Mechanical Engineering Department, SYCET, Maharashtra, India 3 Principal, IOK College of Engineering, Pune, Maharashtra, India 4 Assistant Professor, Mechanical Engineering Department, SYCET, Maharashtra, India Abstract Fossil fuels like as coal, petroleum, natural gas meets the world’s energy demand. They are depleting rapidly at the same time there combustion products are causing global problems such as acid rain, greenhouse effect, ozone layer depletion and pollution which is adversely impacting our environment and eventually total life on our planet. All researchers and engineers always struggling to produce a best suitable and reliable way for substitution of existing fossil fuels such as gasoline, diesel. Hydrogen gas has been considered as a best alternative to gasoline. The various investigators have completed their experiment by running various capacity engines on hydrogen. Most of such experimenter is successful in running IC engines on hydrogen without any big modification. There results and findings are available in the open literatures. However there is no consistency between the results of investigators and this is the big problem of these experiments. The hydrogen combustion increases thermal efficiency and its high velocity burning characteristic gives faster and smoother burning. The hydrogen also reduces critical pollution levels. Hydrogen combustion produces very clean exhaust due to its desirable characteristics. The hydrogen burning lowers HC, CO, CO 2 and NO X levels from exhaust. As of now hydrogen combustion is dangerous due to back fire problems, but new developed technologies and science in fire arresters ensures us the backfire free operation of hydrogen operating engine and same time make it possible to control hydrogen supply precisely. In this paper the experimental analysis and result discussion is made on performance and emissions behavior of hydrogen-gasoline fuelled SI engine and its safe use. Keywords: SI Engine, Gasoline, Hydrogen, Thermal efficiency, Specific fuel consumption and Emissions --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION The fossil fuels such as petroleum, natural gas and coal are being depleting rapidly. These fuels fulfill the energy demand. They are producing high levels of emissions which causing global pollution and environmental problems such as the greenhouse effect, acid rains, ozone layer depletion also by combusting them causes to hamper the natural environment and eventually entire life on our planet. Researchers, engineers and scientists always trying to develop new fuels and burning technologies which will able to lower the today’s pollutions levels [1]. Now a day’s hopes have again been raised about production and development in ‘‘hydrogen economy’’ sector because most of them agreed that hydrogen is best alternative fuel to replace the existing fossil fuels as hydrogen is having the clean burning characteristics. For an engine running only with hydrogen the exhaust gases doesn’t contains carbon oxides, hydrocarbons, particles and lead compounds excluding the unburned hydrocarbons or the carbon oxides provided by oil burning inside the combustion chamber [2]. The hydrogen gas is acting as a light gaseous fuel. It is having high heating value on mass basis, wide flammability that gives wide mixture range in air which permits extremely lean or rich mixtures to support combustion. It requires lower amount of energy to start ignition process which results in extremely high speed flames. Its energy released by combustion per unit mass of chemically correct mixture remains high. The combustion properties of hydrogen have much influence on its performance as an engine fuel [4]. There are mainly two different ways available to introduce hydrogen in combustion chamber for burning process [5]. 1.1 Partial Hydrogen Substitution If hydrogen is used as supplementary fuel in SI engine then it results in improved engine performance. The experiments carried by various author’s shows that the specific fuel consumption decreases while the engine thermal efficiency increases [6]. 1.2 Total Hydrogen Substitution Here the gasoline fuel supply is changed to hydrogen supply. By elimination of carburetor and supply of lean mixtures the back fire problem avoided which is very dangerous in case of hydrogen usages [6]. The supply of lean mixture reduces NO X level and specific fuel consumption. Any small existing SI engine on hydrogen there is no requirements of large modifications [7].