The Exploit Study On Energy Saving Fuels Of Diesel Engine

Methanol is promising and economical and cleaning biomass-fuel. With the utilization of oil-methanol-water composite fuels, constructions of diesel engines which are existing in our country, especially in the countryside, need not to be modified so that the investment of equipment can be reduced, and coarse methanol containing impurities can be utilized to cut down the costs.In this paper, a efficient emulsifying is developed, which particularly suitable for production of diesel oil-methanol-water composite fuels. The quantity of the emulsifying agent needed is fairly smaller, only 0.2%, but emulsions produced can be kept stable a long time.The technology of emulsify-cation in the way of ultrasonic wave and mechanical stir is widely investigated. Factors having influence on stability of emulsions produced in two ways is carefully explored, and the law of parameters of emulsification technology which affect the stability of emulsions is obtained. The two ways are compared, their scope of application is clear. D80H20 diesel oil-methanol-water composite fuels(with 0.2% of the emulsifying agent in emulsified fuel and 15% of water in methanol) can be kept.stable for 28 days by using emulsify-cation in the way of ultrasonic wave, and 48 days by using emulsify-cation in the way of mechanical stir.Tests have been carried on a swirl-chamber diesel engine fueled with diesel oil-methanol-water composite fuels. The effects of using different diesel oil-methanol-water composite fuels are shown. Angles of injection and proportion of water in methanol which have influence on the effect of using diesel oil-methanol-water composite fuels are investigated. When the diesel engine fueled with emulsified fuels containing methanol from 10 to 20 percent with the angles of injection adjusted, the performances of it can be improved, thermal efficiency is raised from 5 to 8 percent, temperature of exhaust and smoke are descended.