PERFORMANCE OF SHEA BUTTER BIODIESEL AS FUEL FOR COMPRESSION IGNITION ENGINES
Publication Date : 01/08/2017
This study investigated the effectiveness of shea butter biodiesel as fuel for compression ignition engine. Acid-base catalyst transesterification method was used to produce the biodiesel from the shear butter oil. The density and viscosity were found to be 893 kg/m3 and 4.35 mm2/s, respectively. Single cylinder four stroke 165F compression ignition engine was used to examine the engine performance. The results have shown that, the brake thermal efficiency (30.9%.) decreases with an increase in engine load, while the specific fuel consumption (300 kWh) increases with an increase in engine load. On the other hand, the brake power (30.9 W) increases with an increase in engine load while the air/fuel ratio (22.5) decreases with an increase in engine load. Gas analyzer was used to determine exhaust gases emitted when shea butter biodiesel was used as fuel. From the results, the amount of nitrogen dioxide (NO2) emitted was 3.8 ppm and hydrocarbon (HC) was 2.5 ppm, while that of carbon-monoxide (CO) was 18 ppm. The study revealed that the performance (brake power and specific fuel consumption) of the engine using shea butter biodiesel increases with an increase in engine load.
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