Abstract
Increasing air pollution is one of the significant problems globally, especially in developing countries that are caused mainly by exhaust emissions from motor vehicles. This study aims to analyse the performance of a diesel engine using biodiesel as fuel and compare it with pure diesel oil. In the present study, biodiesel was produced from waste vegetable oil. The transesterification was performed with methyl alcohol in the presence of catalyst potassium hydroxide. Blends B10 and B20 were made by mixing pure diesel and biodiesel fuel. Various parameters such as brake specific fuel consumption, brake thermal efficiency, mass flow rate, and brake power were calculated. At 5 kg load, the brake thermal efficiency for B10 was higher compared to pure diesel and B20 by 13.72% and 10.02 %, respectively, while the fuel consumption time was 2.35 % and 3.56 % more than pure diesel for B10 and B20, respectively. At no-load conditions, the fuel consumption rate for B10 was maximum, 5.17 % and 12.38 % more than that of B20 and pure diesel, respectively. Thus, without compensating for the power and brake thermal efficiency, vegetable oil-based biodiesel and its blends can be used in CI diesel engines as an alternative fuel.
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