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All Journal JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika JTTM: Jurnal Terapan Teknik Mesin Automotive Experiences Sinergi Polmed : Jurnal Ilmiah Teknik Mesin IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Teknik Informatika & Elektro (JITEK)
Muhammad Idris
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Pengaruh Variasi Bukaan Katup terhadap Kinerja Sistem pada Konfigurasi Pompa Seri dan Paralel David Jomantes Munthe; Jimy Lingga; Jufrizal Jufrizal; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.185

Abstract

Centrifugal pumps are widely used in industry and civil engineering to move fluids by increasing pressure efficiently. This study analyzes the effect of valve opening variations on series and parallel pump configurations simultaneously using a laboratory experiment method with two repetitions. The results show that parallel pump configurations are generally more efficient than series, especially at 50% and 25% valve openings. The maximum efficiency is achieved at 75% valve opening with a value of around 33% for both configurations. Valve opening settings and pump configuration selection are very important to improve the performance and efficiency of pressure piping systems. It is recommended for small industries to use parallel pump configurations with optimal valve opening operations of around 75% for energy efficiency and cost savings. Developing an automatic valve opening control system is also recommended to maximize efficiency, extend equipment life, and optimize fluid distribution.
Pemanfaatan Tungku Berbahan Bakar Oli Bekas untuk Peleburan Aluminium Daur Ulang dan Kajian Mikrostruktur serta Kekerasan Pasca Quenching Yopan Rahmad Aldori; Suprapto Suprapto; Muhammad Idris; Muhammad Angga Prayoga; Evan Roland Girsang
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.313

Abstract

This study investigates the use of a Waste-Oil-Fueled Furnace (WOFF) as an alternative heat source in the melting process of recycled Al-3004 aluminum. The melting was carried out using the sand casting method at a pouring temperature of approximately 730 °C, while measurements indicated the furnace could reach ±900 °C, exceeding the melting point of Al-3004 (±660 °C). The cast specimens were subsequently quenched in three media: water, oil, and air. Microstructural observations revealed that the cooling rate significantly affected crack formation: water quenching produced the largest cracks, oil quenching produced medium-sized cracks, and air cooling produced the finest cracks. Micro Vickers hardness testing supported these findings, showing significant differences in hardness values across the quenching media. Overall, the study confirms that the waste-oil-fueled furnace is an effective alternative energy-based metal-melting technology, while the choice of cooling medium plays a crucial role in controlling the material's microstructural features and mechanical properties.
Optimasi Multi-Respon Massa Roller dan Sudut Pulley untuk Peningkatan Karakteristik Daya dan Torsi pada Sistem Transmisi CVT Sepeda Motor Otomatis Khairul Suhada; B Umroh; Butar-Butar Hafidz; Muhammad Idris; Iswandi Iswandi
Rekayasa Material, Manufaktur dan Energi Vol 9, No 2: JULI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i2.31731

Abstract

The performance of a continuously variable transmission (CVT) system on a small-capacity automatic motorcycle is highly dependent on two adjustable components: roller mass and pulley angle. However, most previous studies have relied on a one-factor-at-a-time approach, adjusting either roller mass or pulley angle separately, thus their combined and interactive effects on engine performance have not been well quantified. This study addresses this gap by simultaneously optimizing roller mass and pulley angle on a 109.5 cc SOHC eSP automatic motorcycle to optimize engine power and torque. A Custom Design-based Response Surface Methodology (RSM) was applied, and thirteen experimental runs were tested on a dynamometer, with roller masses ranging from 11.4–15.6 g and pulley angles from 12.8°–14.2°. A Two-Factor Interaction (2FI) model was developed and evaluated using Analysis of Variance (ANOVA). Both models are highly significant (p 0.0001), with pulley angle identified as the dominant factor and the interaction (A × B) between roller mass and pulley angle statistically significant for both responses. Numerical optimization based on the desirability function yields an optimal configuration at a roller mass of 11.4 g and a pulley angle of 13.597°, which delivers an engine power of 4.777 W and an engine torque of 7.29 N•m with a desirability of 0.522. This validated predictive model quantifies the roller–pulley interaction and provides practical engineering guidelines for tuning automatic motorcycle CVTs to balance power and torque. 
Studi Eksperimental Kalor Biodiesel dari Minyak Goreng Limbah Kiki Syahbana Sembiring; Muhammad Idris; Yetti Meuthia Hasibuan; Uun Novalia Harahap; Darianto Darianto
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i3.160

Abstract

The ever-increasing global energy demand necessitates the development of environmentally friendly and sustainable alternative fuels. Biodiesel is a potential solution, mainly when produced from used cooking oil through the transesterification process. This study aims to evaluate the effect of reaction time on the calorific value of biodiesel using the linear regression method. The calorific value was chosen as the primary parameter because it reflects the energy produced by the fuel. The study analyzed experimental data correlating the transesterification reaction time with the biodiesel calorific value. The results showed that the optimal reaction time was 80 minutes, yielding the highest calorific value of 41.35 MJ/kg, exceeding the ASTM D6751 standard. However, the effect of reaction time on calorific value was not statistically significant, with a P-value of 0.67 and a regression coefficient of 0.02. The decrease in calorific value after 80 minutes is likely caused by overreaction, reducing efficiency. The findings indicate that reaction time is not the sole factor influencing biodiesel calorific value. Future research recommendations include incorporating variables such as reaction temperature and raw material molar ratio to enhance model accuracy. This study is expected to provide a foundation for developing high-quality biodiesel that meets international standards.
Pengaruh Tekanan Uap Boiler Kecil terhadap Kinerja Mekanis Robinson Engine pada Tekanan Maksimum 2,5 bar Hamdani Hamdani; Jufrizal Jufrizal; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.210

Abstract

  This study analyzes the effect of steam pressure variations from a small boiler on the mechanical performance of a Robinson Engine at a maximum pressure of 2.5 bar. A quantitative experimental method was applied with four pressure variations (1.0, 1.5, 2.0, and 2.5 bar). Performance parameters measured included rotational speed, torque, and power, with LPG fuel and water volume maintained as control variables. Results show a significant positive relationship between steam pressure and engine speed; increasing pressure from 1.0 to 2.5 bar raised the speed from 526.2 to 975.6 rpm. These findings highlight the dominant role of steam pressure in engine performance and provide initial quantitative data for developing micro-scale renewable energy-based power plants.
Analisis Penggunaan Energi Listrik Mesin Panen Buah Sawit Tenaga Listrik Corlenius Try Orlando; Iswandi Iswandi; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.280

Abstract

This article analyzes the durability of electrical energy in palm fruit cutter machines as an efficient and environmentally friendly innovation in the field of harvesting tools. The machine is designed using a 12V 15A DC motor that converts the rotary motion into translation through a crank slide mechanism, powered by a 35Ah battery. Tests were carried out on oil palm trees 3–5 meters high by monitoring power consumption and operating time. The results show that cutting thick fronds requires 15 Watts/minute, while thin ones require 11.25 Watts/minute. The effective operation duration reaches 1 hour and 52 minutes. Performance factors are influenced by battery condition, cutting load, transmission efficiency, and cutting tool design.
Evaluasi Variasi Kondisi Operasi Terhadap Perpindahan Panas Kondensor Pada Proses Destilasi Daun Serai Wangi Arga Daniel Pratama Sirait; Darianto Darianto; Iswandi Iswandi; Bobby Umroh; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.299

Abstract

The condenser plays a crucial role in determining the efficiency of lemongrass (Cymbopogon citratus) essential oil distillation by facilitating heat transfer and vapor condensation. This study analyzes the effect of varying operating conditions on the heat transfer rate, Log Mean Temperature Difference (LMTD), condenser effectiveness, and citronella oil production. The evaluation involved three test variations, comparing heat transfer parameters and condenser performance. The results indicate that the heat transfer rate increased from 152,438.27 W in Variation I to 170,963.54 W in Variation II, reaching 186,544.68 W in Variation III. This increase was accompanied by a rise in the LMTD value from 25.18°C to 29.74°C, an improvement in condenser effectiveness from 81% to 89%, and an increase in the conversion of condensate vapor mass into citronella oil from 28% to 36%. These results demonstrate that the increase in heat transfer rate is directly proportional to condenser effectiveness and the success of the condensation process. Variation III represents the optimum operating condition, as it yielded the most efficient heat transfer and the best condenser performance during the citronella leaf distillation process.
Studi Eksperimental Densitas dan Bilangan Iodin Biodiesel Di Produksi Dari Minyak Goreng Limbah Sapriadi Sitinjak; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.100

Abstract

This research aims to determine the effect of varying reaction times (60, 70, 80, 90, and 100 minutes) at a temperature of 65℃ and a rotation speed of 1050 rpm on the density and iodine number of biodiesel. The raw material used for biodiesel production is waste cooking oil. This study employs esterification and transesterification processes by reacting catalysts with methanol mixed with waste cooking oil. The catalyst concentration variations used in this study are methanol at a ratio of 1:2 and 0.5% NaOH of the total waste cooking oil. The transesterification product is then settled for approximately 10 minutes. The resulting biodiesel and glycerol are separated, after which the biodiesel is washed with distilled water at 50℃ and evaporated at 90-100℃. The density test results for the catalyst concentration of methanol at 1:2 and 0.5% NaOH showed values of 858.5 kg/m³ for reaction times of 60, 70, and 80 minutes, 858.7 kg/m³ for 90 minutes, and 858.4 kg/m³ for 100 minutes. The iodine number test results showed values of 87.2 for 60 minutes, 88.3 for 70 minutes, 90.2 for 80 minutes, 92.3 for 90 minutes, and 82.3 for 100 minutes. The research findings indicate that the obtained density and iodine number meet biodiesel quality standards and are suitable for use according to ESDM regulations.
Studi Eksperimental Titik Nyala dan Viskositas Biodiesel Diproduksi dari Minyak Goreng Bekas Muhammad Hussein; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.101

Abstract

Biodiesel is a potential alternative to replace diesel because its raw materials are renewable and environmentally friendly. One of the raw materials used is waste cooking oil. The high content of free fatty acids in waste cooking oil requires pretreatment in the form of esterification before the transesterification process. This study aims to determine the effect of reaction time variations (60, 70, 80, 90, and 100 minutes) at a temperature of 60°C and a stirring speed of 1050 rpm on biodiesel's flash point and viscosity. The biodiesel production process was carried out in two stages: esterification and transesterification. The catalyst concentration was methanol at a 1:2 ratio and NaOH at 0.5% of the waste cooking oil. After transesterification, the mixture was allowed to settle for 20 minutes. The produced biodiesel was washed with distilled water at 50°C and evaporated at 90-100°C. The flash point test results for the reaction time variations showed the following values: 60 minutes (108.5), 70 minutes (182.5), 80 minutes (182.5), 90 minutes (148.5), and 100 minutes (184.5). The results indicated that the cetane number obtained did not meet the biodiesel quality standards and was not yet suitable for use according to the Ministry of Energy and Mineral Resources (ESDM) regulations.
Studi Eksperimental Angka Setana Diproduksi dari Minyak Goreng Bekas Muhamamad Chairul Fahmi; Muhammad Idris
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i1.102

Abstract

Biodiesel is a potential alternative to replace diesel due to its renewable and environmentally friendly raw materials. Used cooking oil can be utilized as a feedstock for biodiesel; however, the high free fatty acid content requires pretreatment with esterification before transesterification. This study aims to determine the effect of reaction time variation (60, 70, 80, 90, 100 minutes) on the cetane number of biodiesel produced at 60°C and a speed of 1050 rpm. The esterification and transesterification processes use 0.5% NaOH catalyst and methanol in a 1:2 ratio, mixed with used cooking oil. After transesterification, the mixture is settled for 20 minutes, then the biodiesel is separated and washed with distilled water at 50°C and evaporated at 90-100°C. The cetane number test results are as follows: 60 minutes (44.54), 70 minutes (44.54), 80 minutes (44.54), 90 minutes (44.47), and 100 minutes (44.60). This study shows that the cetane number of the produced biodiesel does not meet the biodiesel quality standards and is not yet suitable for use by the Ministry of Energy and Mineral Resources (ESDM).
Co-Authors Abu Bakar Sulong Achmad Jusuf Zulfikar Ade Wahyu Nugroho Akhiruddin Akhiruddin Amirsyam Nasution amirsyam nasution AMRU SIREGAR Andhika Ariyudha Andri Herlambang Anggih Prasetyo Wibisono Arga Daniel Pratama Sirait Arif, Zainal B Umroh Bobby Umroh Bongot Halomoan Simamora Burhanuddin Tarigan Butar-Butar Hafidz Corlenius Try Orlando Darianto Darianto Darianto Darianto Darianto, Darianto David Jomantes Munthe Dedy Sofyanto Simanjuntak Denny Fachri Mariadi Derlini Din Aswan Amran Ritonga Eli Simanjuntak Erni Yusnita Etanto Heiliano Wijayanto Etanto Heiliano Wijayanto Evan Roland Girsang Felix Darwin Jaya Waruwu Felix Sigalingging Fider Lumbanbatu Friska Heriyanti Hamdani Hamdani Haniza Harahap, Uun Novalia Husri Zarmawan Ibrahim, Husin Imam Azhari Indra Hermawan Indra Hermawan Indra Hermawan INDRA HERMAWAN Iswandi Iswandi Iswandi Iswandi Iswandi Jimy Lingga Joko Joko Jufrizal Jufrizal JUNAIDI Khairul Suhada Kiki Syahbana Sembiring M Dalil M. Yusuf R Siahaan M.Y. Yuhazri Mahliza Nasution Mhd. Dimas Kurniawan Muhamamad Chairul Fahmi Muhammad Abdul Rasyid Muhammad Angga Prayoga Muhammad Hussein Muhammad Irwanto Muhammad Yusuf Rahmansyah Siahaan Poppy Aprilya Sitorus Pratiwi Putri Lestari Putri Rizky Rahmatullah . Randa Pratama Rani Saragi Recsi Febian Adiansyah Rihat Sebayang Sandi Saputra Sapriadi Sitinjak Siswo Pranoto Siswo Pranoto Suherman Sukmawati Suprapto Suprapto Supriadi Supriatno, Supriatno Syafruddin Ritonga Syurkarni Ali Tino Hermanto Tony Siagian Uun Novalia Harahap Wan Rizca Amelia Weriono Yakob Iskandar Yetti Meuthia Hasibuan Yopan Rahmad Aldori Zakir Husin Zakir Husin