高速ディーゼル機関における廃食用油の適応

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The edible oil (food-grade vegetable oil) that has been wasted about 400,000 ton per year from home and factories use will be able to use for a fuel oil of diesel engines. It will be useful as a recycling, so we tried to use for the diesel engine (YANMAR-3ESDL). The experiment was conducted by three patterns. The first was of using some blended fuels which were mixed with waste edible oil and diesel fuel by several ratios. The second was changing the injection timing from -10 deg. to -14 deg. C.A (B.T.C), and then, delayed to -8 deg. The third was heating of the waste edible oil for reducing the viscosity index to the level of diesel fuel. And the tests were tried in the condition of 20kPa charged air, constantly from idling to full load. The data of exhaust gas analysis and the engine performance were recorded, and then compared with normal performances by using of diesel fuel. As for the blended fuel of the waste edible oil and diesel fuel, a carbon deposit was seen until the low mixing rate of waste edible oil. Therefore, it is necessary to clean up fuel injection nozzles and cylinders periodically. So the desirable percentage of the waste edible oil in the blended fuel will be 30vol% or less for use. The carbon deposit was accumulated around the hole of injection nozzles or the cylinder. Moving forward the injection timing, the injection period became longer. So the deposit was increased. But, by heating waste edible oil at 100℃, an injection pattern of atomization became better, so the combustion got better, too, and the carbon deposit almost couldn't be seen, and then low NOx and smoke condition were performed.
神戸大学の論文
2004-07-31

高速ディーゼル機関における廃食用油の適応

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