A comparative analysis of spray combustion of kapok seed oil and Jatropha oil as an alternative Biofuel

This study is aimed to analyse the comparison of the spray combustion using kapok seed oil and jatropha oil through the combustion length, combustion width and combustion stage by using a video camera with the speed of 420 fps in the spray nozzle tester with a pressure of 2,100 psi. The result of the comparative analysis showed that the spray combustion of kapok seed oil is better than that of jatropha oil; it is found that 1) there is an 11.3 % difference between the maximum spray combustion length of kapok seed oil and jatropha oil, in which the maximum fire ranges of combustion using kapok seed oil and jatropha oil is 136 mm and 121 mm, respectively, 2) there is a 17.95 % difference between the maximum spray width of combustion using kapok seed oil and jatropha oil, in which the maximum fire ranges of combustion using kapok seed oil and jatropha oil are 46 mm and 39 mm, respectively, and 3) the analysis results in the combustion stage shows that there is one combustion stage in the kapok seed oil combustion and four combustion stages in jatropha oil combustion.