Dynamometer evaluation and engine wear characteristics of palm oil diesel emulsions |
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Authors: | H S Sii H Masjuki A M Zaki |
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Affiliation: | (1) Department of Mechanical Engineering, University of Malaya, 59100 Kuala Lumpur, Malaysia |
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Abstract: | Dynamometer engine tests at steady-state conditions and a wear characteristics study were carried out on an indirect-injection
diesel engine with palm oil diesel (POD) and its emulsions. The POD fuel was obtained in commercial form, and its emulsions
were created by mixing POD fuel to contain 5 and 10% of water by volume. Variations in the engine’s performance characteristics
were determined from the results of steady-state tests carried out at fifteen selected torque-speed matrix points of the engine’s
performance map. The wear characteristics tests were performed by running the engine at half throttle setting for twenty hours
for each fuel system. Then a desk-top comparison study was performed between the base-line fuel system of ordinary diesel
(OD), POD, and its emulsions. Promising results have been obtained. Neither the lower cetane number of POD fuel nor its emulsification
with water presented obstacles to the operation of the diesel engine during a series of steady-state engine tests and the
twenty-hour endurance tests. Engine performance and fuel consumption for POD and its emulsions are comparable with those of
OD fuel. Accumulations of wear metal debris in crank-case oil samples were lower with POD and its emulsions than with baseline
OD fuel. |
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Keywords: | Diesel engine engine dynamometer evaluation engine oil engine performance methyl ester palm oil diesel (POD) emulsions wear characteristics |
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