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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 19 Documents
 1   2 
Search results for , issue "Vol 4 No 1 (2025): April" : 19 Documents clear
Pengolahan Gas Buang Hasil Pembakaran Campuran Refuse Derived Fuel dan Serbuk Gergaji dengan Spray Tower Scrubber Ilmi, Ilmi; Simamora, Junjungan; Suherman, Suherman; Siregar, Zufri Hasrudy
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.v4i1.190

Abstract

The growing volume of waste has encouraged the use of fuel derived from waste as an alternative energy source. However, its combustion releases flue gas containing harmful pollutants. This study assesses the effectiveness of a spray tower in reducing the opacity and temperature of flue gas generated from the combustion of a mixture of waste-based fuel and sawdust. Experiments used three fuel masses and three system setups: no sprayer, two sprayers, and four sprayers. Results showed that the spray tower reduced opacity from 33 per cent to about 15 per cent with two sprayers and 11.2 per cent with four sprayers. Gas temperature decreased from 65 degrees Celsius to 39 degrees and 35 degrees Celsius. A higher number of sprayers led to greater pollutant reduction. This technology shows promise as an environmentally friendly method for controlling emissions.
Analisis Pengaruh Variasi Kecepatan Putaran Pisau Terhadap Kualitas Potongan Bawang Merah Pada Mesin Pengiris Faruqi, Muhammad Dava; Ardaha, Mhd. Taufik; Hermanto, Tino; Aldori, Yopan Rahmad
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.v4i1.192

Abstract

Manually slicing shallots is challenging for MSMEs engaged in the fried shallot industry. This study aims to analyze the effect of variations in the speed of knife rotation on the quality of the results of the sliced ​​shallots on the slicing machine. The study was conducted experimentally with five variations in rotation speed, measured using a tachometer, and visual observation to assess the quality of the slices. The results showed that the cutting speed increased from 61 kg/hour to 89 kg/hour, with the quality of the slices remaining at 85%. This study recommends the highest speed as optimal for productivity without reducing the quality of the slices.
Studi Pemanfaatan Enceng Gondok (Eichhornia Crassipes) sebagai Bio-briket Ramah Lingkungan: Studi Eksperimental Bahri Widodo, Syamsul; Arif, Zainal; Yakob, Iskandar; Suheri, Suheri; Sembiring, Dicky Maranata
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.v4i1.193

Abstract

Eichhornia crassipes (water hyacinth) is a fast-growing aquatic plant in tropical regions like Indonesia. Though often considered a weed, it remains underutilized as an alternative energy source. This study explores its potential as a solid fuel in the form of eco-friendly bio-briquettes. The production process includes drying, carbonization, sieving, mixing with binder, molding, and final drying. Laboratory tests involved proximate analysis and calorific value measurement. Results showed that the briquettes contained 9.61% moisture, 3.93% ash, 7.89% volatile matter, 78.57% fixed carbon, and a calorific value of 25.8 kJ/g. Compared to coconut shell briquettes, water hyacinth briquettes burn more slowly but offer cleaner and more stable combustion. These characteristics make them a suitable renewable energy source for households and small industries.
Pengaruh Penggunaan Variasi Bahan Bakar dan Beban Kelistrikan Terhadap Kinerja Engine Diesel Gunawan, Safri; Mulia, Mulia; Doni, Rahma; Gulo, Yanuardi; Pratama, Muhammad Reza; Sitohang, Yodi; Zan'nah, Sofiya Vari; Affandi, Dery
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.v4i1.196

Abstract

The global energy crisis has driven efforts to find alternative fuels that are efficient and environmentally friendly. One focus is testing the performance of diesel engines against variations in fuel. This study aims to analyse the effect of diesel fuel types, including Bio Solar, Dexlite, and Pertamina Dex, with cetane numbers of 48, 51, and 53, respectively, on diesel engine performance in terms of power, torque and specific fuel consumption parameters at various levels of electrical load. The method used is an experiment involving a graded electrical load test ranging from 300 to 1500 Watts. Data were collected under stationary conditions at 1500 rpm using instruments such as voltmeters, ammeters, tachometers, and fuel burettes. The results show that Pertamina Dex produces the highest power at peak load due to its high cetane number, while Bio Solar provides the highest torque due to a longer combustion delay. The highest specific fuel consumption occurs in Pertamina Dex at low loads, while Bio Solar is more efficient at low load conditions.
Pengaruh Elektroplating Ni-Cr terhadap Wetability dan Ketahanan Korosi Sumuran pada Baja Tahan Karat 316L dalam Media Infus 0,9% NaCl Pakpahan, Binsar Maruli Tua; Pasaribu, Muhammad Nuh Hudawi; Simatupang, Lisnawaty; Silaban, Robert; Pakpahan, Natal Toga Hot Tua; Sihombing, Prada; Sinaga, Sabas DK
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.v4i1.197

Abstract

This study aims to evaluate the effect of Ni-Cr electroplating on wettability characteristics and pitting corrosion resistance of 316L stainless steel in 0.9% NaCl infusion media. The electroplating process consisted of a nickel base coating for 15 minutes, followed by chromium plating with durations ranging from 10 to 22.5 minutes. Contact angle measurements showed that Ni-Cr coating increased the contact angle from 71.25° to 86.77°, indicating a surface transformation from hydrophilic to more hydrophobic. This increase in contact angle demonstrates the effectiveness of Ni-Cr plating in enhancing the material’s resistance to liquid penetration, a critical property for biomedical applications. Corrosion tests revealed a reduction in pit count and depth after plating, suggesting a significant improvement in resistance to localised corrosion. These findings indicate that Ni-Cr electroplating significantly improves pitting corrosion resistance. This technique can be implemented to enhance the durability of 316L-based implant materials in corrosive body environments, particularly in applications where long-term biocompatibility and surface stability are essential.
Analisis Kinerja Mesin Peniris Bawang Untuk Industri Makanan Skala Kecil Dwy, Shera; Hermanto, Tino; Iswandi, Iswandi; Darianto, Darianto
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.v4i1.199

Abstract

This study aims to analyze the performance of a fried onion draining machine designed for the needs of small-scale food industries. The machine operates using the principle of centrifugal force and is constructed with 304 stainless steel to ensure food safety and resistance to corrosion. Testing was conducted using variables such as rotation speed, draining time, and material capacity. Results show that the machine can reduce oil content in fried onions by 14.29% within 2 minutes, with a draining capacity of 50 kg per hour at 700 rpm. Energy efficiency achived was 35,49%, showing the potential for practical application of this machine in the UMKM environment. The use of this machine results in fried onions that are crispier, have a longer shelf life, and are processed more hygienically and efficiently. Further recommendations include design and operation system optimization to improve performance.
Analisa Efektivitas, Produktivitas dan Mutu Minyak Pada Mesin Empty Bunch Press Pabrik Kelapa Sawit Mahyunis, Mahyunis; Winardi, Rafael Remit; Raja, Padamulia; Giyanto, Giyanto; Fazli, Hafiz Darma
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.v4i1.202

Abstract

The empty bunch press is a tool that extracts oil from empty palm fruit bunches to reduce oil losses. This study aimed to assess the machine's effectiveness and productivity, measure oil content in the residue, and evaluate the quality of the oil bunch press . A quantitative descriptive method was applied through 14 days of observation at a palm oil mill laboratory. Results showed that the oil content in empty bunches was 6.36%, that of residue was 1.12%, and that of oil bunch press  was 5.23%. Input weight was 4,071 kg/hour, output 1,833 kg/hour, and extracted oil 95.87 kg/hour. The machine's effectiveness was 82.23%, and productivity was within a 5–6 tons/hour capacity. Oil bunch press quality tests showed 5.24% FFA, 0.41% moisture, and 0.12% impurities. Although losses and oil quality exceeded standard limits, the oil bunch press  will be refined before blending with production oil.
Analisa Kekuatan Sambungan Las Tig pada Roll Bar Mobil KMHE dengan Alumunium 6061 Melalui Uji Bending Elvan, Elvan; Lubis, M. Sobron Yamin; Darmawan, Steven
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.v4i1.203

Abstract

The welding process is a production process that aims to combine two types of materials into a usable component. In the manufacturing industry, the Tungsten Inert Gas welding process is widely used in industrial processes requiring high accuracy, good welding quality, and welding results. This study compares the strength of welded joints by varying the welding current. This research uses 6061 aluminum material to determine the strength of Tungsten Inert Gas welding joints. The study focused on the strength of Tungsten Inert Gas welding joints with current variations of 140 A, 160 A, and 180 A using a testing method using a three-point bending test to determine the right current variation in the Tungsten Inert Gas welding process. This study found that the current variation of 160 A with a strength of 203.7 N/mm2 is better than 140 A, 139.9 N/mm2, and 180A, 192.1 N/mm2 in Tungsten Inert Gas welding joints.
Perancangan Mesin Dewatering Untuk Pemisah Sludge Pada Kolam IPAL Pabrik Kelapa Sawit Suherman, Suherman; Mizhar, Susri; Muharnif, Muharnif; Ilmi, Ilmi; Tanjung, Muhammad Subhan Ananda
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.v4i1.198

Abstract

Sludge generated from the wastewater treatment plant of palm oil mills contains a very high moisture content, which increases volume, handling costs, and poses a potential risk of environmental pollution if not properly managed. One of the main challenges encountered is the lack of a simple, economical small-scale dewatering machine that is suitable for the characteristics of sludge produced by palm oil mill wastewater treatment systems. This study aims to design and fabricate a dewatering machine to separate sludge from water in the wastewater treatment ponds of a palm oil mill. The research method involved designing the machine using SOLIDWORKS software, performing technical calculations of the main components such as motor power, shaft dimensions, belt transmission, and bearings, followed by fabrication and assembly processes. The performance of the machine was then evaluated based on its ability to separate sludge and water. The results indicate that the designed dewatering machine has a capacity of 200 litres per hour with a motor power of 1 HP; however, its performance has not yet reached optimal conditions, as part of the sludge remains attached to the screen, thereby increasing the motor load and hindering the movement of the screw. The findings of this study suggest that the dewatering machine design has the potential for further development through optimisation of the screw geometry and filtration system in order to improve sludge water separation efficiency in palm oil mill wastewater treatment plants.

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