Performance Evaluation Of A Diesel Engine Using Blends Of Optimized Yields Of Sand Apple (Parinari Polyandra) Oil Biodiesel
Published 2019 · Engineering
Abstract Sand apple oil seed that has relatively high oil yield is widely cultivated in Africa. Evaluation of the performance of sand apple ethyl ester is a missing link in establishing it as an alternative fuel for use in diesel engines. Performance evaluation of optimized yields of sand apple biodiesel was, therefore, conducted in a diesel engine at various loading rates. Oil was extracted from sand apple seeds via solvent extraction. A Central Composite Design was used to optimize biodiesel yields from sand apple oil transesterification using potassium hydroxide as catalyst. Engine tests were carried out to evaluate the performance of a stationary 5Hp diesel engine starting from 0% to 100% load conditions. The engine was run with diesel and four different blends of diesel/biodiesel. Values for speed, torque, fuel consumption rate and exhaust temperature were determined. The optimum biodiesel yield recorded was 94.6%. The torque, speed, fuel consumption rate and exhaust temperature recorded for best engine performance for all blends were 8.50 Nm, 2950 rpm, 2.925 × 10−6 kg/s, and 300 °C. The evaluated engine parameters showed sand apple biodiesel can be burned in diesel engines using appropriate blending ratio without any modification to the engine.