It has been posted as a challenge for the researchers to identify an alternate fuel source for the petroleum fuels. This had become a major concern as the harmful pollutants are being produced in the exhaust of engines. The present works aims at the suitability study of esterified pine oil blended with diesel fuel as a replacement of diesel in an unmodified CI engine. The direct pine oil is a source obtained from agriculture. It has the innate characters like high viscosity, high calorific value and low cetane number values. It was found that esterified pine oil blended with diesel fuel could be successfully used with acceptable performance and better thermal efficiency. From the experimental investigation it is found that by blending pine oil with diesel, brake thermal efficiency can be increased up to 25%, friction power can be reduced by 4 kW. All the emission were observed to be low for the blended samples. The major contents like CO2 and NOx were decreased by 30%. It is suggested to replace the diesel with pine oil blend for applications with low friction power and will thus help in achieving energy economy and rural economy development.
The present work concerns with the evaluation of performance and emissions characteristics of CI engine using cottonseed based biodiesel (B20) with fuel additive N-butonal at different concentration levels. In the experimental work it was observed that addition of N-butonal as additive improved the performance of CI engine and reduced the emission levels of NOx, CO, HC. Tests were also conducted the effect of inlet air preheating and results shows the significant improvement in the engine performance and reduction in the emission levels. Better performance and emission levels observed when the engine runs at air inlet temperature of 60°C
Non-edible biodiesel extracted from jatropha oil is broadly studied to solve the twin problem of reduction of fossil fuels and environmental degradation. The present study is conducted on unmodified variable compression ratio (VCR) diesel engine for exploring the effect of biodiesel blends. The performance characteristics of Jatropha oil are compared with diesel fuel at two compression ratios 17 and 18. The viscosity and density are 23% and 3.9% higher with respect to diesel for pure jatropha methyl ester and calorific value is lower for J100, 6.8% with respect to diesel. Performance and emission have been observed better when compression ratio increases from 17 to 18 and also notice that the hydrocarbon (HC) and carban monoxide (CO) emission reduced but corban dioxide CO2 and NOX emission increases.
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