Conversion of palm starch waste biomass into energy sources through gasification process could be done to meet the energy requirement in palm noodle industry. This research used the Refuse Derived Fuel (RDF-5) based on the palm Starch waste. This is due to the how to overcome the solid waste around the home industry of noodle in Jawa Tengah. This study was conducted to determine the performance of up-draft gasifier with variations of air flow rate, i.e., 72 lpm, 95 lpm, and 123 lpm. The results showed that the variation of air flow rate has affected to the gasification product. The optimum LHV value occurred at 122 l/m air flow rate, where the LHV value increased with the increase of air flow rate, but after passing 122 l/m, the LHV value was continually decreasing.
The most important issues in spray combustion science are how to understand the mechanism of the combustion of liquid fuel spray, especially in the flame-spread phenomenon. In spray combustion, combustion is the existence of the group is very important in order to obtain the stable combustion. Therefore, the flame spread among fuel droplets affects the occurrence of stable combustion in the spray combustion engine. This study was focused on phenomenon on diesel combustion engines. This research was conducted to study the behavior of flame spread rate of flame spread and limit the distance of bio-diesel liquid droplets. This research method was used experimental research. Microgravity condition was Obtained through the free fall tower with the height of the tower used is 6 m. Observed droplets suspended was placed on SiC fibers with different distance and droplet size 1 mm. This study observed Also the influence of the flame propagation direction of the burning droplet to the next burning droplets that lies in the direction and perpendicular to the direction of the flame propagation. The results showed that the bio-diesel fuel droplet Igniter (I) could burn next droplet (A)at a distance (S/d0) = 8.
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