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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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Kota malang,
Jawa timur
INDONESIA
Rekayasa Mesin
Published by Universitas Brawijaya
ISSN : 23381663     EISSN : 24776041     DOI : 10.21776/ub.jrm
Core Subject : Engineering,
Mechanical Engineering
Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia. Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in Bahasa and English Language.
Arjuna Subject : -
Articles 43 Documents
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Search results for , issue "Vol. 16 No. 1 (2025)" : 43 Documents clear
A REVIEW OF RAILWAY TRACKS MAINTENANCE OPTIMIZATION THROUGH RAMS METHOD Hadi, Rasyadani Luthfan; Wicaksono, Satrio; Suweca , I Wayan
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1720

Abstract

Railway tracks are complex assets that require a comprehensive and integrated management approach to improve service quality in the era of modernization of the railway industry. The RAMS (Reliability, Availability, Maintainability, and Safety) method is one of the approaches used in managing railway track to ensure that the railway system operates safely. The discussion in this literature review is categorized into three sections including (1) RAMS on Railway Tracks, (2) RAMS Analysis Tools on Railway Tracks such as RBD, FMEA, FMECA, and FTA, then, (3) Challenges and Future Directions of RAMS on Railway Tracks. Based on the review, research related to RAMS in railway tracks is limited due to the complexity of the railway tracks. However, the formulations and principles of research associated with RAMS on railway systems can be adopted in the analysis of RAMS railway tracks because the principles generally apply to railway systems including railway tracks. The implementation of RAMS on railway tracks can be used as a reference to improve the performance of railway track assets and provide long-term benefits by minimizing costs due to accidents or catastrophic failures for the Indonesian railway industry.
RANCANG BANGUN BUCKET PADA MINI EXCAVATOR LISTRIK Sugiyanto, Sugiyanto; Prihadianto, Braam Delfian; Harjono, Harjono; Estiko, Dendi Milnanda; Siswantoro, Soeadgihardo
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1723

Abstract

The prime mover for the majority of heavy equipment units is still dominated by fossil fuel engines. Before starting innovation on expensive large excavator machines, innovation can be started with electric mini excavators which have almost the same working system but have affordable development costs. This research focuses on the bucket which is an indicator of the performance of an excavator unit. The research method used was designing, making, and testing a bucket attached to a mini excavator. The final objective of this research is to design the bucket components that are installed on the electric mini excavator and also determine the volume of the bucket when it is in the flat position (struck) and in the full position (heaped). Based on research that has been carried out, the bucket volume of the mini excavator props when it is in the flat position (struck) is 0.012 m3 or the equivalent of 16.8 kg of sand and when it is in the full position (heaped) it is 0.017 m3 or the equivalent of 23.8 kg of sand.
MINIMALISASI MINIMUM ZONE CIRCLE MENGGUNAKAN METODE STATIONARY POINT Oktriadi, Yudi; Saputra, Anggi; Kurniawan, Zaldy; Wahyudie, Ilham Ary
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1727

Abstract

The success of the manufacturing world in improving production processes is greatly influenced by the machine equipment used. SKD-11 steel has high wear resistance and good ductility, so it is suitable for components that require high precision and durability. Surface Response Method (RSM) Box-Behnken Design can be used in the optimization process, which has three variables that can predict the best optimum value. The roundness variable used in this research is MZC (Minimum Zone Circle), whose non-roundness value is the difference between the radius of the most extensive circle profile and the smallest circle profile, MZC. From the test results, it was found that the smallest non-sphericity was 7.5 μm. The optimal value for this test is VC 234.784 m/minute, feeding 0.127 mm/rev and depth of cut 0.18 mm, and the predicted response value is 13.05 μm. From the results of the ANOVA analysis, these three factors have no effect on roundness, but there is one factor that almost influences roundness, namely the depth of cut.
KARAKTERISTIK SISTEM GASIFIKASI TYPE DOWDRAFT GASIFIER BERBAHAN BAKAR BIOMASSA BERDASARKAN VARIASI VOLUME RUANG BAKAR Elfiano, Eddy; Suripto, Heri; Hastuti, Kurnia; Arizona, Rafil; Lihantoro, Bayu
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1742

Abstract

This research aims to investigate the attributes of a Downdraft Gasifier gasification system that employs biomass fuel and features varying combustion chamber capacities. The primary focus is on examining how alterations in combustion chamber volumes affect gasification characteristics. Analytical techniques that hinge on these discrepancies in combustion chamber capacities yield a comprehensive understanding of efficiency, thermal functionality, and gas discharges. The outcomes suggest that the gasification setup furnishes adequate thermal energy for highly efficient catfish drying. Additionally, the application of gasification diminishes noxious discharges from the exhaust, thereby establishing a more eco-friendly technology. The most efficient utilization of energy is apparent in rice husks, accounting for operational duration, steam generation, and assessments of performance parameters. As per gas emission analyses, wood powder demonstrates reduced emissions compared to rice husks, particularly concerning CO2, CO, SO2, NO, and NOX emissions throughout the gasification process.
PERFORMANSI MESIN DIESEL MENGGUNAKAN BIODIESEL DARI CAMPURAN BIJI KARET-MINYAK PIROLISIS LIMBAH PLASTIK-MINYAK SOLAR Sitorus, Tulus Burhanuddin; Tambunan , Bisrul Hapis; Sihombing , Hendrik Voice; Ambarita, Himsar
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1765

Abstract

This research examines the performance of a Diesel engine that uses alternative fuel biodiesel from a mixture of rubber seeds with plastic waste pyrolysis and diesel oil. The plastic waste used is plastic bottle caps, which are processed by pyrolysis to obtain oil. One of the objectives of mixing biodiesel with plastic waste pyrolysis oil is to increase the calorific value of rubber seed biodiesel. The calorific value of rubber seed biodiesel is 39.95 kJ/kg, and the calorific value of plastic waste pyrolysis oil is 46.55 kJ/kg. Mixing rubber seed biodiesel with plastic waste pyrolysis oil increases the calorific value of rubber seed biodiesel by around 9.63%-13.63%. Experimental results show that there is a reduction in exhaust emissions when using biodiesel for opacity of 7.51-66.08%, CO 12.5-50%, HC 7.14-62.96% and an increase in CO2 emissions of around 3.08-84.62%. Tests using biodiesel were carried out without modifying the Diesel engine.
ANALISIS FOTO MAKRO TERHADAP KEKASARAN BAJA ST 60 HASIL PEMBUBUTAN FACING DI MESIN CNC HARDINGE Syaiful, Syaiful; Panggabean, Hasbullah
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1766

Abstract

Technological advances have made the manufacturing sector an industry that needs to develop and compete globally, one of which is CNC machines which produce quality products for industrial needs. In producing a material at CNC machine, the latest design software is needed, namely Autodesk Fusion 360. Apart from lest, on then machine processing, it is desired to produce a material surface with a good roughness value. The desired result of this research is to analyze roughness value towards facing turning results on CNC machines for variations in spindle speed, namely 410 rpm, 450 rpm, 660 rpm, 900 rpm, 1100 rpm and 1200 rpm using carbide chisels and dromus coolant. The roughness of the facing surface can be assessed using a Surface Roughness Tester and analyzing the material structure using macro photos. The results of specimen testing showed that the smallest roughness value occurred of a spindle speed of 1200 rpm with a value of Ra = 0.810 µm and the output of observations make use macro photos represent that the roughness structure of the material was very smooth compared to the production process on CNC machines using other spindle speeds.
OPTIMASI DESAIN SHELL AND TUBE HEAT EXCHANGER TIPE SINGLE SEGMENTAL BAFFLE DENGAN VARIASI JUMLAH BAFFLE DAN POTONGAN BAFFLE MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMIC Fajri, Ahmed; Saputra, Trisma Jaya; Dewi, Rany Puspita
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1793

Abstract

The heat exchanger is a device used to transfer heat between two process streams. In general, the flow that occurs in shell and tube heat exchangers is parallel flow or counter flow. To change the flow in the shell and tube heat exchanger into the cross flow, baffles can be added. The ideal cutting for baffle cutting is taken 20% to 35% of the inner diameter of the shell while the baffle distance is one-fifth of the inside diameter (ID) of the shell or 2 inches. Shell type "E" consists of 9 tubes with a 45° square pattern arrangement and single segmental baffle type with different orientations of baffle spacing and cuts 6, 8, 10 baffles and 25% and 30% of the shell inner diameter. CFD simulation results were obtained in the form of temperature distribution contours, pressure flow profile. The analysis shows that a properly selected baffle spacing and cut has the maximum potential to improve the heat exchanger performance up to 59.15%, as shown in the heat exchanger with 10/25% configuration. Increasing the number of baffles can increase the effectiveness-NTU by about 11% to 13%, while the same baffle spacing with different baffle cuts shows that 30% baffle cuts can reduce the pressure drop problem by about 8% to 11% compared to 25% baffle cuts.
STUDI PERFORMA PEMANEN ENERGI PIEZOELEKTRIK DENGAN METODE VORTEX INDUCED VIBRATION Gamayel, Adhes
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1829

Abstract

Piezoelectric energy harvesters (PEHs) convert mechanical energy into electricity. They operate based on pressure or vibration. One method for inducing vibration in PEHs is vortex-induced vibration (VIV), which harnesses wind energy using a bluff body. In this study, the researchers investigated the output voltage generated by PEHs at different altitudes, specifically 6.25 cm and 12.5 cm. Both experimental and simulation approaches were employed. The experimental setup included a PEH composed of a piezoelectric bimorph and a rectangular-trapezoid substrate. Wind speeds of 5, 7, and 9 m/s were tested in a wind tunnel with a cross-section of 250 mm x 250 mm. The simulation utilized the finite element method to explore wind flow patterns. Notably, the results revealed that PEHs positioned at an altitude of 6.25 cm generated higher voltages than those at 12.5 cm. At an altitude of 6.25 cm, each wind speed's maximum electrical voltage values are 4.18 volts, 4.67 volts, and 5.13 volts, respectively. The maximum electric voltage value at a height of 12.5 cm for each wind speed is 2.1 volts, 3.94 volts, and 4.44 volts, respectively. This phenomenon is attributed to the narrowing of the wind tunnel’s inlet area due to the presence of a bluff body, leading to increased air velocity along the tunnel walls. Consequently, a vortex forms near the square bluff body, resulting in pressure fluctuations that induce PEH vibration and generate voltage.
ANALISIS EKSERGI KIMIA SISTEM KONVERSI LIMBAH PADAT CANGKANG SAWIT DENGAN TEKNIK PIROLISIS PLASMA Purawiardi , Ibrahim; Aribah, Putri; Aminuddin, Aminuddin; Dimyati , Arbi; Sari, Yessie Widya; Elbersen, Wolter; Maddu, Akhiruddin
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1847

Abstract

Chemical exergy analysis was commonly used to evaluate the effectiveness of some energy conversions derived from biomass. In this study, this analysis was conducted to evaluate oil palm kernel shell conversion via high-temperature plasma treatment. The plasma treatment was conducted with a DC power source with a voltage of 12 V and current variations of 40, 50, 60, 70, and 80 A. This chemical exergy efficiency was calculated based on gas chromatography (GC) analytical results. The calculated results showed that the chemical exergy efficiency increased exponentially as the current increased. Thus, based on this result, the arc plasma treatment is more recommended to be applied for the pyrolysis application of oil palm kernel shell than its gasification.
USULAN KEBIJAKAN PEMERIKSAAN PADA GARDU TRAKSI LRT PALEMBANG BERDASARKAN ANALISIS NILAI KEANDALAN DAN KETERSEDIAAN Putra, Chandra Dwi; Virdyawan , Vani; Rachmilda , Tri Desmana; Suweca, I Wayan
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1853

Abstract

The Palembang LRT, the first light rail transportation system in Indonesia, operates at the traction substation. This research aims to propose an optimal inspection policy based on reliability and availability values. The study found that the reliability of the 750 V output DC cubicle sub-equipment is 84.01%, the feeder is 97.22%, the MV switchgear 20 kV AC is 98.60%, and the power supply controller (SCADA) is 94.04%. The availability value of the 750 V output DC cubicle sub-equipment is 99.99%, the feeder is 99.98%, the MV switchgear 20 kV AC is 99.99%, and the SCADA is 99.97%. The inspection time interval with a reliability target of 90% for the 750 V output DC cubicle sub-equipment is 181 hours, with the feeder sub-equipment having intervals of 1256 hours, MV switchgear 20 kV AC sub-equipment every 2513 hours, and the SCADA sub-equipment every 599 hours.

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