Experimental Investigation on Performance and Emission Characteristics of CI DI VCR Engine using Biodiesels and their Blends

Abstract

The development of any nation depends on the energy availability and consumption. As newlineper Indian scenario the fuel consumption is increasing year by year because of improved newlineeconomy. The researchers and technocrats are striving hard to find the energy sources newlinewhich can be a substitute for petroleum derived fuels. The biofuels are gaining newlineimportance as a substitute fuel for petroleum derived diesel fuel. Biodiesels are newlinerenewable, biodegradable, non toxic, environmental friendly fuels which could be used in newlinepresent day automobiles with or without modification. newlineThe biodiesels used in the present experimental investigation are Pongamia, Jatropha and newlineSimarouba. These biodiesel are prepared with their respective oils by transesterification newlinemethod. The three biodiesels considered are mixed two at a time and in the different newlinevolume ratios i.e. 75:25, 50:50 and 25:75. The Pongamia and Jatropha are mixed in the newlineratio 75% Pongamia+25% Jatropha (P75+J25) and designated as M1, similarly the newlinemixture (P50+J50) as M2, and (P25+J75) as M3 respectively. In the same way Pongamia newlineand Simaruoba are mixed in different volume ratio and designated as M4, M5, and M6. newlineThe Jatropha and Simarouba are mixed and designated as M7, M8 and M9. These newlineprepared mixtures are blended with diesel in different volume ratio. The B20M1 is the newlineblend of 20% of M1 +80% of diesel fuel, similarly B40M1, B60M1, B80M1 and newlineB100M1 which is mixture of two biodiesel. newlineFuel properties play an important role in the combustion, performance and emission newlinecharacteristics of engines. Properties of biodiesel are within ASTM and European newlinestandards and comparable with diesel fuel. The flash and fire points are higher, having newlinelesser heating value and higher viscosity. New correlations are developed to find the newlinedensity and viscosity of mixture of two biodiesel at elevated temperatures. Using these newlinecorrelations the density and viscosity of the mixture of two biodiesel can be found for any newlinetemperature and for any volume fraction of biodiesel in the blends. newlineThe mathematical correla