Performance study of Diesel Engine by using jatropha (Bio diesel) and its Blends
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16-05-2010, 08:22 PM
Performance study of Diesel Engine by using jatropha.ppt (Size: 146.5 KB / Downloads: 417)
Performance study of Diesel Engine by using jatropha (Bio diesel) and its Blends with Diesel Fuel
Â¢ To conduct performance test of CI engine using blended diesel with different fuel proportions. The alternate fuels used are pongamia, Jatropha.
Â¢ Performance parameters like brake thermal efficiency, specific fuel consumption, and brake power for various fuel proportions are to be determined. And performance charts to be drawn.
Â¢ Present work deals with testing performance of CI engine with different blends of non-edible oil as well as their methyl esters with petrodiesel. To improve the performance of parameters like brake thermal efficiency, specific fuel consumption ,brake power and reduction in brake specific fuel consumption ,especially at higher load .
Â¢ The methods used to reduce viscosity are; blending, emulsification, pyrolysis and transesterfication.
Â¢ To conduct the performance on IC engine the following blended oils will be used
Specific Fuel Consumption (sfc) : The fuel consumption characteristics of an engine are generally expressed in terms of specific fuel consumption in kilograms of fuel per kilowatt-hr.
sfc = fuel consumption per unit time per unit power
Brake Thermal Efficiency : It is the ratio of energy in the brake power, bp, to the input fuel energy in appropriate units.
Brake Power : The rotational force available at the delivery point at the engine crank shaft and the power corresponding to it.
Â¢ Diesel is heavier.
Â¢ Diesel is a better lubricant.
Â¢ Diesel evaporates much more slowly.
Â¢ Dieselâ„¢s boiling point is higher than water.
Â¢ Diesel fuel contains more energy.
Invented Diesel Engine in 1892 to run on Peanut Oil
The use of vegetable oils may seem insignificant today. But such oils may in the course of time be as important as petroleum and the coal tar products of present time. â€œ 1912
Biodiesel is the name of a clean burning alternative fuel, produced from domestic, renewable resources. Biodiesel contains no petroleum, but it can be blended at any level with petroleum diesel to create a biodiesel blend. It can be used in compression-ignition engines with little or no modifications. Biodiesel is simple to use, biodegradable, nontoxic, and essentially free of sulfur and aromatics.
How is Biodiesel made?
Biodiesel is made through a chemical process called transesterification whereby the glycerin is separated from the fat or vegetable oil. The process leaves behind two products -- methyl esters (the chemical name for biodiesel) and glycerin, a valuable byproduct used in soaps and other products.
Â¢ Biodiesel is non-toxic .
Â¢ Biodiesel is more lubricious than petrodiesel.
Â¢ Biodiesel is a solvent (rots rubber)
Â¢ Biodiesel decomposes more quickly than petrodiesel
Â¢ Biodiesel gels at a higher temperature than petrodiesel
Â¢ Biodiesel has a higher flash point (260Ã‚Â°-425Ã‚Â° F vs. 125 Ã‚Â° F)
Â¢ Biodiesel can be mixed with petrodiesel at any ratio
A diesel engine takes in just air, compresses it and then injects fuel into the compressed air. The heat of the compressed air lights the fuel spontaneously.
A diesel engine compresses at a ratio of 14:1 to as high as 25:1. The higher compression ratio of the diesel engine leads to better efficiency.
Characteristics of old diesels
Â¢ No pick-up
Â¢ Difficult to start in winter
Â¢ Great mileage
Â¢ Low maintenance
Â¢ Last forever
Â¢ Accountants love em for the overall cost savings
Characteristics of Biodiesel
Â¢ Liquid varying in color
Â¢ High boiling point of 360â€œ640Ã‚Â°F (182â€œ338Ã‚Â°C)
Â¢ Low vapor pressure: < 2 mmHg
Â¢ Flash point 199Ã‚Â°F (93Ã‚Â°C)
Â¢ Specific gravity between 0.86 & 0.90
Â¢ Vapor density > 1
Â¢ Less hazardous in terms of flammability
Â¢ The conversion of jatropha oil into its methyl ester can be accomplished by the transesterification process.
Â¢ Three blends were obtained by mixing diesel and esterified jatropha in the following proportions by volume: 75% diesel + 25% esterified jatropha, 50% diesel + 50% esterified jatropha, and 25%
diesel + 75% esterified jatropha
Â¢ Performance parameters like brake thermal efficiency, specific fuel consumption, and brake power will be determined by testing the IC engines at various loads and results will be drawn on graphs to analyze.
Â¢ SFC [kg/kw hr] Vs Brake Power [kW]
Â¢ Brake thermal efficiency [%] Vs Brake power [kW]
Â¢ Exhaust gas temperature [Ã‚Â°C] Vs Brake power [kW]
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Joined: Jun 2010
27-09-2010, 05:41 PM
Energy Ratio Determination for Bio-Diesel Derived from Jatropha Plant.ppt (Size: 426.5 KB / Downloads: 150)
Jatropha is a genus of approximately 175 succulent plants, shrubs and trees from the family Euphorbiaceae
Goldman Sachs recently cited Jatropha curcas as one of the best candidates for future bio-diesel production
The plant becomes ready to yield fruit in an year and provides fruit for a period for 50 years
When jatropha seeds are crushed, the resulting jatropha oil (on an average 37%) can be processed to produce a high-quality bio-diesel that can be used in a standard diesel car
Jatropha curcas grows almost anywhere, even on gravelly, sandy and saline soils. It can thrive on the poorest stony soil
Its water requirement is extremely low and it can stand long periods of drought by shedding most of its leaves to reduce transpiration loss
Regarding climate, Jatropha curcas is found in the tropics and subtropics and likes heat, although it does well even in lower temperatures and can withstand a light frost
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01-03-2011, 05:32 PM
plase send me Performance study of Diesel Engine by using jatropha (Bio diesel) and its Blends project and implimentation report and all the details.
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