Abstract
Marine heavy fuel oil is usually supplied to diesel engines after some purifications on board . The purification systems are generally settling system, filtering system, centrifuging system, etc. The centrifuging system has a good performance for the purification. It is identified by using various apparatus and complicated procedures at a laboratory. To examine a property of heavy oil precisely and easily, the analysis and evaluation methods were examined. Three analysis methods before and after centrifuging were compared with each fuel oil sampled : 1) general oil analysis 2) combustion test 3) ferrography. Next other effectiveness were checked on some published indexes.
The result shows the conclusion that the centrifuging effectiveness and the delicate characteristic difference to dirty of recent marine heavy fuel oil can be clearly confirmed by the ferrography analysis.
The fuel properties after centrifuging are improved to the combustion test in some cases.
