THE ANALYSIS OF DIESEL ENGINE PERFORMANCE USING COAL OIL MIXTURE (COM)

摘要

Coal oil mixture (COM) is a combination of coal and petroleum to produce liquid fuel which the character approaching diesel oil. As an alternative fuel, the use of COM related to the properties and the diesel engine performance need to be further analyzed. In this study, the coal used is low rank coal which added by xylene and toluene additives and then mixed with marine diesel oil (MDO). The ratio of MDO: coal: additive used is 50:10:10 to produce the optimal liquid coal. As the comparison of COM, MDO and HFO will be tested. The results of this study show that COM can be used in diesel engine and have the potential characteristic to be developed as an alternative fuel, even though the diesel engine performances including power, SFOC and thermal efficiency by using MDO are better than COM due to the bigger of heat release rate and the shorter ignition delay.