Abstract
Consumption of bio-fuels increasing in internal combustion engines due to the scarcity, increased cost, increased emissions of conventional fuels. Vegetable oils have been used to possible alternative to diesel fuel in CI engines. In the present work, biodiesel was produced from vegetable linseed oil and combination of sun-flower and coconut oil , investigations were carried out to study performances and emissions by using biodiesel under the subsequently load (0%,25%,50%,75%,full load) on single cylinder four stroke water cooled diesel engine. Linseed oil and combination of (sunflower + coconut oil) is converted into biodiesel by the transesterification process, it becomes linseed methyl ester (LME) and sunflower &coconut methyl ester (SCME). B10, B20, B30 blends are prepared from LME and SCME combining with diesel. Among three blends (of LME and SCME) B10 gives maximum Brake thermal efficiency but emission(CO,CO2,HC) are reduced in case of B20( of LME and SCME) and it has brake thermal efficiency nearer to B10 comparing with diesel. B20 is better due to reduction in emission parameter and has second highest brake thermal efficiency
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