Vol 8, No 3 (2017) > Mechanical Engineering >

Analysis of the Heat Release Rate of Low-concentration Bioethanol from Sago Waste

Numberi Johni Jonatan, Arifia Ekayuliana, I Made Kartika Diputra, Yulianto Sulistyo Nugroho


Abstract: This study aimed to
analyze the heat release rate from the combustion process of bioethanol from
sago waste to determine the viability and feasibility of low-concentration
bioethanol as an alternative fuel. The heat release rate, exhaust gas, and
flame temperature were measured using a cone calorimeter, and bioethanol
combustion was conducted using the pilot ignition method, with an ethanol
quality range of 60–70%. The analysis that the heat release rate of 60%
bioethanol combustion ranged from 20 to 140 kW/m2, while a lesser
range resulted from 70% bioethanol combustion (18–45 kW/m2). The
flame temperature for 60% bioethanol was found to be 440°C, while the smoke and
orifice temperature was 150°C. The combustion of 70% bioethanol produced a flame
temperature of 450°C and a smoke and orifice temperature of 120°C after approximately
6 min of combustion. This study contributes a solution for meeting the energy
demand in rural areas, where the access to and availability of major fuel
resources are limited. In addition, from the obtained results, this research
concluded that bioethanol made from sago waste is suitable as a clean and
alternative fuel for household applications in rural areas.
Keywords: Flame temperature; Heat release rate; Low-concentration bioethanol; Sago waste

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