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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Hendry Sakke Tira
university of mataram
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Analysis of the Calorific Value and Specific Gravity of Breadfruit Peel Bioalcohol (Artocarpus Altilis) as an Alternative Fuel at Various Distillation Temperatures Hendry Sakke Tira; Mirmanto; Iwanuddin; Salman; Sudirman
Jurnal Penelitian Pendidikan IPA Vol 9 No 7 (2023): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i7.2878

Abstract

The objective of this study was to investigate how distillation temperature affected the specific gravity (SG) and calorific value of bioalcohol derived from breadfruit peels (Artocarpus altilis) as an alternative fuel. The process of producing bioethanol from breadfruit peels begins with pretreatment of the peels, followed by hydrolysis with hydrochloric acid, fermentation, and finally distillation. The hydrolysis process used 20% hydrochloric acid in a volume of 25 ml, and the fermentation took 6 days with a mass of 30 gr of yeast Saccharomyces cerevisiae. The distillation process lasted two hours, with temperatures varying between 70, 80, and 90°C. This study yielded the highest alcohol content of 72.80% at 70°C and the highest volume of bioalcohol of 35.67 ml at 90°C. Meanwhile, the best Specific Gravity (SG) at 70°C was 0.8393. Furthermore, the calorific value test results revealed that the calorific value increased with increasing alcohol content. The highest calorific value obtained was 23003.406 J/gr, which was close to the ethanol calorific value of 29700 J/gr, while the lowest calorific value obtained was 22339.008 J/gr at a distillation temperature of 90°C
Analisis Eksperimental dan Statistik Pengaruh Tekanan Udara dan Massa Benda Kerja terhadap Kecepatan Silinder Pneumatik pada Sistem Produksi Modular Hendry Sakke Tira; Mulyadi Mulyadi; I Gusti Ngurah Ketut Yudhyadi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.414

Abstract

Industrial automation systems widely employ pneumatic actuators; however, most existing studies focus on control strategies or isolated actuator components, with limited experimental validation in integrated automation platforms and insufficient evaluation of fundamental parameters such as supply pressure and load mass. This gap restricts a comprehensive understanding of actuator performance under realistic conditions. This study aims to experimentally and statistically evaluate the effects of air pressure and workpiece mass on pneumatic actuator performance in a Modular Production System (MPS) distributing station. A full factorial design (3 × 3) was used, with three levels of air pressure (3, 5, and 7 bar), three levels of workpiece mass (106, 112, and 118 g), and three repetitions per condition (27 runs). Cylinder speed was determined from the measured airflow rate, and statistical analysis was performed using one-way ANOVA. The results show that air pressure has a significant effect on cylinder speed (p < 0.05), with a 165% increase from 3 bar to 7 bar. In contrast, workpiece mass variation does not significantly affect cylinder speed (p > 0.05). These findings indicate that actuator performance in modular pneumatic systems is primarily governed by pressure-induced airflow. The study provides experimentally validated insights for improving system performance through effective pressure regulation.
Co-Authors I Gusti Ngurah Ketut Yudhyadi Iwanuddin Mirmanto Mulyadi Mulyadi Salman Sudirman