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Perum Graha Garuda Mas Blok II No. 39 Dusun V Desa Sigara-Gara Kecamatan Patumbak Kabupaten Deli Serdang Provinsi Sumatera Utara, Indonesia, Kode Pos: 20361.
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IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Published by CV. IRA PUBLISHING
ISSN : -     EISSN : 29624290     DOI : https://doi.org/10.56862/irajtma
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) fokus pada artikel ilmiah hasil penelitian dan review dalam bidang teknik mesin dan aplikasinya yang antara lain meliputi: 1. Konversi energi 2. Mekanika 3. Material 4. Manufaktur 5. Lain-lain yang relevan
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 37 Documents
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Search results for , issue "Vol 4 No 3 (2025): Desember" : 37 Documents clear
Perancangan Alat Pirolisis Limbah Plastik Menjadi Bahan Bakar Alternatif Arif, Rif’an; Subagyo, Tulus
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.v4i3.267

Abstract

This research discusses the design and testing of a simple, economical pyrolysis device for converting plastic waste into an alternative fuel. The pyrolysis device measures 1000 mm × 700 mm × 580 mm, with a reactor constructed from a used 12-kg LPG cylinder, equipped with a steam delivery pipe, a two-coil spiral condenser, and other supporting components. Test results indicate a device performance of 0.000005 liters/h, indicating that the device is still operating on a small scale with low efficiency. The volume of liquid smoke produced reaches 3.26 m³/kg based on the assumed water vapor density. Recommendations for development include optimizing the condenser design, adding thermal insulation, using more comprehensive measuring instruments, and testing various temperatures and plastic types to improve efficiency. This research is the first step toward using plastic waste to produce valuable alternative fuels.
Analisis Aerodinamika Diffuser Dengan Kurvatur Lengkung Berbasis Airfoil Pada Variasi Sudut Serang dan Tinggi Flange Muhammad, Baginda Arsyi; Wiratama, I Kade; Joniarta, I Wayan
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.v4i3.269

Abstract

Low wind speeds in residential areas often pose an obstacle to the use of small- and micro-scale wind turbines. Various efforts have been made to address this issue, particularly to improve wind turbine performance. One such method is the application of a diffuser, or wind lens, during turbine operation. However, existing diffuser designs still require further development in order to achieve more efficient aerodynamic performance, optimize wind speed, and provide a more compact configuration. In this study, a diffuser with curved geometry based on the Wortmann FX-63-137 airfoil was analyzed using Ansys Fluent simulations. The variations tested included angles of attack of 0°, 4°, 8°, and 12°, as well as flange heights of 0.05D, 0.10D, 0.15D, 0.20D, and 0.25D. The simulation results indicated an increase in wind velocity at the throat area, with the best performance achieved at a 4° angle of attack with a 0.10D flange. Under these conditions, the available wind power reached 203.20 W, representing an increase of approximately 34.01%.
Analisis Kelayakan Tangki Timbun CPO Kapasitas 500 dan 1000 Ton Berdasarkan Ketebalan Roundshell, Suhu, dan Tekanan Hidrostatis Raja, Pada Mulia; Mahyunis, Mahyunis; Istiadzah, Tiara Briliani; Zakwan, Zakwan; Winardi, Rafeal Remit; Rahimah, Rahimah; Lubis, Zulyaden
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.v4i3.278

Abstract

This study aims to determine the feasibility of using 500-ton and 1000-ton Crude Palm Oil (CPO) storage tanks in a palm oil mill. The evaluation is based on the roundshell thickness, operating temperature, and hydrostatic pressure acting on the tanks. A descriptive quantitative method was applied using primary and secondary data from PMKS Simpang Gambir. The results showed that for the 500-ton tank, the calculated roundshell thickness is 8.6 mm, the actual is 8.87 mm, and the design is 9 mm, with a hydrostatic pressure of 5.73 Pa. For the 1000-ton tank, the calculated thickness is 13.1 mm, the actual thickness is 13.8 mm, and the design thickness is 14 mm, with a hydrostatic pressure of 11.46 Pa. The corrosion rates are 0.00072 mm/month and 0.0011 mm/month, respectively. Based on the analysis, the 500-ton tank is feasible for continued use for approximately 31 years, and the 1000-ton tank for 53 years, assuming constant corrosion rates.
Kebutuhan Energi Mekanik Mesin Perontok Sawit Dengan Motor Listrik Tiga Fasa Melalui Transmisi Sabuk-V Di Pabrik Kelapa Sawit Kusuma, Nanda; Faisal, Busrizal; Winardi, Rafael Remit
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.v4i3.286

Abstract

A thresher is a crucial unit in a palm oil mill that separates loose fruit from fresh fruit bunches (FFB). Its performance is significantly influenced by the availability of mechanical energy transmitted from a three-phase electric motor through a V-belt system. This study aims to analyze the mechanical energy requirements of a thresher under varying FFB loads and electrical parameters. The research method employed field observation, current and voltage measurements, and energy consumption calculations. The results indicate that the greater the FFB load processed, the higher the motor's electrical current requirements. The maximum current was 49.84 A at 380 V, with a motor power of 20 kW. The highest load the machine can handle is 3,324 kg, with a kinetic energy requirement of 72,000 kJ. Analysis of the current-load relationship shows a linear pattern, confirming a direct relationship between increasing mechanical capacity and electrical energy consumption. These findings emphasize that matching electrical power to mechanical load capacity is crucial to prevent energy inefficiency and machine damage from overload. This research contributes to efforts to optimize energy consumption in palm oil mills by regulating input load, maintaining the V-belt transmission system, and implementing more efficient motor control technology.
Analisis Pengaruh Bentuk Ekor dan Kecepatan Kendaraan terhadap Performa Aerodinamis Purwarupa Kendaraan Mandalika Desantara Suryadi, Sapwan; Tira, Hendry; Yudhyadi, I Gusti Ngurah Ketut
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.v4i3.296

Abstract

Increased energy demand and the automotive industry in Indonesia are driving innovation in efficient vehicles through more aerodynamic designs. This study tested the aerodynamic performance of the Mandalika Desantara vehicle prototype on variations in tail shape and vehicle speed. The computational fluid dynamics simulation method was used to obtain the aerodynamic parameters. The speed variations applied were 12.33 m/s, 17.89 m/s, 23.44 m/s, and 29 m/s. The results showed that vehicles with long tails had better aerodynamics with a drag coefficient of 0.0849 and a lift coefficient of 0.0889 at a speed of 29 m/s. The low drag and lift coefficients indicated reduced drag and lift forces, thereby improving performance and maintaining vehicle stability.
Manufaktur Alat Pengolah Limbah Plastik Menjadi Bahan Bakar Alternatif (Minyak Solar) dengan Metode Pirolisis Zaira, Jupri Yanda Zaira; Dani, Darwis; Novison, Roni; Wijianto, Agus; Hasibuan, M. Refky
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.v4i3.308

Abstract

Pyrolysis is a thermochemical process that can break down organic/inorganic materials into more valuable compounds by heating them to high temperatures. In this research, a laboratory-scale plastic waste pyrolysis system was manufactured, designed using CAD software, with all material components and the heating system selected. The pyrolysis unit consists of a stainless-steel reactor tube as the main component with a diameter of 0.5 m and a height of 1.5 m, an LPG-based heating system, and a galvanic condensation tube to convert vapor into pyrolysis oil. The manufacturing process involved fabricating the reactor tube using Shielded Metal Arc Welding (SMAW) with a 2.6 mm-diameter E6013 electrode. The testing was conducted at temperatures ranging from 300 to 400°C, with a capacity of 10 kg of polyethylene (PE) and polypropylene (PP) plastic per cycle. During the initial phase, leaks were found at the pipe joints and reactor lid, but repairs using heat-resistant sealing adhesive successfully restored the device to proper function. The outcome of this research is the creation of a pyrolysis unit capable of converting plastic waste into a primary product, pyrolysis oil. Each cycle, with a plastic waste capacity of 10 kg, can produce approximately 4.5 liters of pyrolysis oil, along with pyrolysis gas and solid residue. The produced pyrolysis oil has a calorific value of approximately 462 kJ/kg, which is close to that of fossil fuels (diesel oil), with a density of 0.83- 0.85 g/cm³.
Analisis Postur Kerja Analis Laboratorium dengan Metode RULA untuk Mengurangi Risiko MSDs Arjuna, Febri Gilang; Harahap, Uun Novalia; Hasibuan, Yetti Meuthia; Haniza, Haniza
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.v4i3.312

Abstract

This study aims to analyze the working postures of laboratory analysts using the Rapid Upper Limb Assessment (RULA) method to identify the risk of Musculoskeletal Disorders (MSDs). Observations were conducted during primary laboratory activities to document body posture, joint angles, and work duration. The RULA assessment indicated moderate to high risk, suggesting the need for immediate corrective actions. Major contributing factors to MSD risk included bent working postures, repetitive arm movements, and non-ergonomic workstation design. Recommended improvements involve workstation adjustment, posture correction, and the application of ergonomic principles. This study is expected to support MSD prevention efforts and improve comfort and productivity among laboratory analysts.
Pemanfaatan Tungku Berbahan Bakar Oli Bekas untuk Peleburan Aluminium Daur Ulang dan Kajian Mikrostruktur serta Kekerasan Pasca Quenching Aldori, Yopan Rahmad; Suprapto, Suprapto; Idris, Muhammad; Prayoga, Muhammad Angga; Girsang, Evan Roland
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.
Karbon Aktif Berkelanjutan dari Limbah Bonggol Pisang: Karakterisasi dan Kinerja Adsorpsi untuk Limbah Industri Irsyadul Ibad, Mochamad; Bashori, Hasan
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.v4i3.314

Abstract

This study investigates the use of banana corm waste as a raw material for producing activated carbon for textile wastewater treatment. The objective of the research was to produce activated carbon from banana corms using potassium hydroxide (KOH) and sulfuric acid (H₂SO₄) as activating agents, and to evaluate its adsorption performance on methylene blue dye. The activated carbon was prepared through carbonization at 250°C, followed by chemical activation using KOH and H₂SO₄, washing to neutral pH, and drying. The characterization included moisture content, ash content, iodine adsorption capacity, methylene blue adsorption, and UV-Vis spectrophotometric analysis. The results showed that H₂SO₄-activated carbon exhibited higher methylene blue adsorption capacity compared to KOH-activated carbon, while KOH-activated carbon had lower ash content. Overall, the activated carbon derived from banana corms met the quality standards for activated carbon in terms of moisture, ash, and iodine adsorption. These findings indicate that banana corm-based activated carbon has potential as an eco-friendly, effective adsorbent for removing dye pollutants from textile wastewater.
Analisis Variasi Rapat Dan Tegangan Pada Proses Anodisasi Terhadap Kekerasan dan Ketahanan Aus Paduan Aluminium Rizky, Muhammad Adrian; Mulyaningsih, Nani; Hadi Sufyan, Fendy Kussuma
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.v4i3.315

Abstract

Aluminum alloys are widely used in the automotive industry, particularly for radiators, due to their lightweight nature, good corrosion resistance, and excellent thermal conductivity. However, these materials remain vulnerable to wear from internal erosion and contamination, necessitating additional protection. This study investigates the effects of varying current density and voltage during anodizing on the hardness and wear resistance of 3xxx-series aluminum alloys. The process was carried out in a sulfuric acid (H₂SO₄) electrolyte for 40 minutes using currents of 4 A and 5 A, combined with voltages of 25 V and 35 V. Micro-Vickers testing revealed the highest hardness of 162.63 VHN at 4 A and 25 V, while the best wear resistance was achieved at 5 A and 35 V with a specific wear rate of 0.000302371 mm³/kg (an improvement of 24%).

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