Comparison of Diesel Engine Characteristic Using Pure Coconut Oil, Pure Palm Oil, and Pure Jatropha Oil as Fuel
ABSTRACT: Diesel engine can be
operated on either pure plant oil (PPO) oil or biodiesel. Biodiesel production
process is expensive due to many stages of processes, while PPO has a lower
cost of production, lower energy consumption, and simpler process. There are
several potential biofuel resources in Indonesia such as coconut, palm, and
jatropha. They are tropical plants with large amonts of their quantity.
Experiment was conducted in 17 hours engine running test (endurance test) with
various operating cycle conditions. Test fuels are pure coconut oil (PCO), pure
palm oil (PPaO), pure jatropha oil (PJO), and diesel fuel (DF) as a datum. Each
PPO blends with diesel fuel with composition 50%-volume. As a result, PCO has
higher BSFC (10%) before endurance test in comparison with diesel fuel, also
PPaO (13%) and PJO (27%) show a similar
condition. Surprisingly, all PPO have BSFC almost similar with DF after
endurance test due to decreasing of engine components friction. On the other
hand, PPO produces more uncompleted combustion than DF. Phosporus content has
major responsibility of deposit growth. PCO, PPaO, and PJO result more engine
deposits in comparison with DF, which
accounts for 139,7%, 232,9%, and 288,9% respectively. Based on wear analysis,
PCO has the best antiwear property among test fuels, whereas the worst is DF.
Author: Iman K. Reksowardojo,
Y. Hartanto, T. P. Brodjonegoro, W. Arismunandar
Journal Code: jptmesingg090004
