Abstract
Fuel oil is one of the important parts to support daily activities. The demand for fuel oil is increasing every year. Therefore, the search for the latest energy source is continuously conducted. Carica papaya L. seed oil is investigated as a renewable energy source replacement part of petroleum diesel fuel. C. papaya seed oil obtained through the extraction process using soxhlet method with n-hexane solvent. Then produce methylester by means of transesterification using 1 % NaOH catalyst and 20 % methanol of the weight of the oil and stirred at 400 rpm for 1 h. A mixture consisting of 10 % C. papaya seed biodiesel and 90 % petroleum diesel fuel, called CPSB-10, produces fuel properties that meet the specified standards by the Indonesian Directorate General of Oil and Gas. From the result of the performance test in a diesel test engine, the maximum brake power and brake thermal are consecutively 30.6 kW and 140.23 N m, the lowest sfc is 268 g kW–1 h–1, and the highest brake thermal efficiency is 32 %.
Highlights
The increasing number of world population and the increasing need of human beings over time resulted in an increase in global energy demand
The mixing of methyl ester with diesel is done with percentage of methyl ester volume of 10 % and 20 % and tested the characteristic of the mixture at UPPS Laboratory of Pertamina Surabaya and the performance test of the machine was done in Automotive Laboratory at Petra Christian University by using water brake dynamometer and a diesel test engine
At the peak brake power at 2 200 rpm, an engine with CPSB-10 fuel produces work with 29.6 % of brake thermal efficiency or 4.6 % higher than pure petroleum diesel fuel (PPD) fuel
Summary
The increasing number of world population and the increasing need of human beings over time resulted in an increase in global energy demand This fact leads to a decrease in energy supplies, especially for the types of energy coming from non-renewable sources, and even from time to time, this energy sources will eventually run out. A lot of research has been done to find alternative fuel sources that can effectively reduce or even replace conventional fossil fuels that are commonly used today These studies are conducted to find alternative fuels for both gasoline and diesel engines. In Indonesia, the biodiesel production process as an alternative fuel for diesel engines is still quite expensive because it uses palm oil as the raw material. The mixtures whose properties meet the specification standards that will be tested on diesel engines to know their effect on the performance of diesel engines
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