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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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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 981 Documents
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CO2 CAPTURE USING DISSOLVED AMMONIA (NH4OH) - ARTICLE REVIEW Nuryoto, Nuryoto; Demustila, Harly; Rahmayetty, Rahmayetty
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

The rise in carbon dioxide (CO₂) emissions has accelerated efforts to develop environmentally sustainable alternative carbon capture and utilization technologies. Among the promising approaches is the use of ammonium hydroxide (NH₄OH) for CO₂ capture. The objective of this study is to systematically investigate the influence of CO₂ flow rate, temperature, pH, NH₄OH concentration, and stirring speed on the performance of CO₂ capture, as determined through a comprehensive literature review. The review findings demonstrate that each of these variables plays a critical role in enhancing CO₂ capture efficiency, as evidenced by the increased percentage of CO₂ removed. Temperature and pH directly influence the chemical equilibrium of the reaction, whereas stirring improves the diffusion of gas into the liquid medium. The interrelated effects of these parameters highlight the necessity of adopting a systematic approach to process optimization. In conclusion, an in-depth understanding of these influencing factors is essential for the development of a robust and sustainable CO₂ capture system. It is recommended that future studies incorporate integrated experimental research, process modeling, environmental impact evaluations, and product analyses to support the scaling up of this technology for mini-plant and commercial-scale implementation.
OPTIMIZATION OF FDM 3D PRINTING PARAMETERS ON THE TENSILE STRENGTH OF FOOD-GRADE PLA FILAMENT USING THE TAGUCHI METHOD Pristiansyah, Pristiansyah; Hasdiansah, Hasdiansah; Subhan, Muhammad; Sukanto , Sukanto; Aswin , Fajar; Masdani , Masdani; Ariansyah , Ariansyah
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Additive manufacturing, particularly 3D printing, has emerged as a transformative technology in digital fabrication, enabling the rapid, accurate, and cost-effective production of complex components. Among the various 3D printing methods, Fused Deposition Modeling (FDM) is one of the most prevalent techniques, employing thermoplastic filaments as its primary material source. This research aims to determine the optimal process parameters to achieve the highest tensile strength in components fabricated using food-grade Polylactic Acid (PLA) filament. To accomplish this, the Taguchi method was implemented as a robust design tool to optimize the manufacturing process, improve material performance, and reduce both cost and resource consumption. The experimental design followed the L27 Orthogonal Array, and the analysis was conducted using the Signal-to-Noise Ratio (SNR) to identify the most significant parameter combinations affecting tensile strength outcomes. The investigated process parameters included extruder temperature, build plate temperature, layer thickness, infill pattern, and deposition speed. Based on the results, the optimal conditions for maximizing tensile strength were identified as follows: extruder temperature of 190 °C, build plate temperature of 60 °C, layer thickness of 0.2 mm, triangle infill pattern, and deposition speed of 60 mm/s. Additionally, the parameters with the greatest influence on tensile strength, ranked from most to least impactful, were: build plate temperature, layer thickness, infill pattern, deposition speed, and extruder temperature.
DESIGN OPTIMIZATION OF BREAD-BAKING OVEN CHAMBER: A COMPUTATIONAL FLUID DYNAMICS (CFD) APPROACH TO THE TEMPERATURE DISTRIBUTION Sektiono, Moch. Wisnu Arif; Wahyu, Mujahid; Halimi, Ahmad Dzulfikri; Hendarti , Devina Rosa; Cahyono, Hiding
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This paper presents a Computational Fluid Dynamics (CFD) simulation of a bread oven under steady-state conditions. An experimental measurement methodology was performed to determine the temperature distribution characteristics in the oven chamber. The CFD model simulation of the bread oven shows a homogeneous temperature distribution. Using a numerical model validated against experimental measurements, it is possible to highlight the temperature distribution pattern in the oven chamber and understand how the temperature spreads in a conductive air medium. Using data from experimental tests and CFD simulations, observations were made on temperature variations for 100, 110 and 120 in the oven chamber. The temperature for the oven chamber is distributed for a homogeneous distribution, with the temperature being 120 °C in both measurement and simulation. The lowest flow velocity is ~ 1.1 m/s, which is indicated by the light blue colour on the oven rack, and the highest velocity is ~ 4 m/s.
THERMODYNAMIC ANALYSIS OF ALKALINE ELECTROLYSIS UNDER VISIBLE LIGHT ILLUMINATION: COMPARATIVE ASSESSMENT OF GREEN AND BLUE LED EXPOSURE Santoso, Mardi; Ahmad, Anton Royanto; Sinurat, David Fernando; Hamidi, Nurkholis; Purnami
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study explores the thermodynamic behavior of alkaline electrolysis under visible light illumination, focusing on the effects of green and blue wavelengths in the absence of chemical additives. Through a series of controlled experiments, temperature evolution, energy input, and thermal efficiency were analyzed over a 20-minute electrolysis period. Results show that both green and blue light enhance the system's thermal response compared to dark (control) conditions, with blue light achieving the highest temperature rise and energy conversion efficiency. Arrhenius analysis revealed a clear temperature dependence of the rate constant, and strong correlations were observed between temperature rise (ΔT), heat energy (Q), and system efficiency. These findings suggest that visible light particularly blue light can significantly improve the thermal dynamics of electrolysis systems, paving the way for low-cost, passive solar-assisted hydrogen production.
NUMERICAL STUDY OF THE DESIGN OF THE RECLINING HANDLE FOR THE TOYOTA KIJANG CAPSULE MADE FROM COMPOSITE MATERIAL REINFORCED WITH SUGARCANE BAGASSE FIBERS Faizin, Kholis Nur; Gascoin, Nicolas; Sumiaji, Sumiaji; Majedi, Farid; Bowo, Prayogo Arie; Aziz, M. Shafwallah Al.
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Rapid advancements in science and technology have increased the demand for renewable and high-performance composite materials. Sugarcane bagasse, an agricultural waste, has potential as a natural fiber reinforcement in composite materials. This study investigates the use of sugarcane bagasse fibers with epoxy and polyester resin matrices for manufacturing the handle reclining component of the Toyota Kijang Kapsul. Molds were successfully fabricated using Silicon Rubber RTV-52 with a catalyst ratio of 1:25, producing precise molds suitable for composite fabrication. Compression testing revealed that epoxy-based composites achieved an average maximum compressive load of 10,673.49 N, approximately 28% higher than polyester-based composites, which averaged 8,332.83 N. Epoxy composites also showed more consistent performance across specimens. Structural analysis using ANSYS indicated that composite handles exhibited lower deformation, higher equivalent stress, and greater safety factors d to plastic counterparts. The handle reclining parts produced from epoxy resin and sugarcane bagasse fibers with a 25:75 fiber-to-resin ratio successfully replicated the original part's appearance and demonstrated superior mechanical performance. This study contributes to the development of cost-effective, environmentally friendly composite materials with practical applications in the automotive industry.
The Effect of Friction Spot Stir Welding in Installing Double Cover Rivet Lap Joints on Aluminum 2024 – T3 and 7075 – T6 with Mechanical Strength Sehono, Sehono; Wibisono, Febrian Adi; Putra, Ikbal Rizki
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.1604

Abstract

Selection and treatment of materials in the aerospace, marine, transportation, and manufacturing industries are crucial for achieving efficient configurations. Aluminum is one of the materials widely used in these industries due to its lightweight, corrosion resistance, and good electrical conductivity properties. Aluminum alloys 2024-T3 and 7075 are often used in aircraft component manufacturing due to their strength and excellent corrosion resistance. The commonly used joining method is riveting, but there are also other methods such as friction spot stir welding (FSSW). In this study, joining was performed using rivets and followed by the FSSW process on aluminum plates of types 2024 and 7075. The objective of this research is to investigate the mechanical strength of rivet joints combined with the FSSW process on plates with different types. A literature review on aluminum, alloys 2024-T3 and 7075-T6, as well as the riveting and FSSW joining methods, was also conducted. The experimental method involved joining the two types of plates using rivets and subsequently performing the FSSW process. The results of this research are expected to provide a better understanding of the mechanical strength of rivet and FSSW joints on aluminum plates with different types.
Effect of Air Flow on Drying Stevia Rebaudiana using Solar Dryer Greenhouse Nurhadianty, Vivi; Dewi, Luthfi Kurnia; Sarosa, Aji Hendra; Muttaqim, Moch Fitron; Hidayat, Fahrul Huzain
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.1780

Abstract

A phenomenon known as the greenhouse effect happens when solar radiation is trapped and heats the planet. This effect is useful for drying agricultural materials. One of the natural sugar substitutes that is dried during production is stevia rebaudiana. This research aims to determine the effect of air flow rate in drying using a solar greenhouse dryer on the water content and drying rate of stevia leaves. The Variable of the air flow rate used are 155 cm/s, 135 cm/s, natural and will be dried for 1, 2, 3, 4, 5, and 6 hours in the Solar Dryer Greenhouse. The stevia's water content was measured with a thermogravimetric. The results showed drying stevia using the Greenhouse Solar Dryer with an air flow rate of 155 cm/s produced the best drying performance with a decrease in the water content of stevia leaves of 89.7% and the highest drying rate of 21.3 kg H2O/kg solids.
Influence of Anodizing Parameters on Surface Hardness of Recast Al6061 for Hexapod Fixator Ring Development Firdaus, Iffa Azzahra; Priadythama , Ilham; Setyanto, R Hari
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2042

Abstract

Blount’s disease can potentially reduce the productivity of the next generation. An external fixation device, such as a hexapod, is required to manage this disease. However, a hexapod is still difficult to access at an affordable price. Gravity casting is an alternative manufacturing process that can potentially reduce the cost of a hexapod, especially its ring component. However, it might face issues related to surface quality and potential defects. Anodizing can enhance the surface protection and mechanical strength of components, but studies on the anodizing of cast surfaces remain limited. This study aims to determine the effects of current density (2, 2.5, and 3 A/dm2) and anodizing time (10, 15, and 20 minutes) on the hardness and characteristics of the oxide layer on hexapod ring surfaces made from re-cast aluminum 6061. The results indicate that anodizing at 2.5 A/dm2 for 20 minutes produces an oxide layer with the highest hardness value.
Validation of Experimental Study and SimulationOTEC Power Plant using Shell-Tube Heat Exchanger Materials with Copper, Tin, and Working Fluid Ammonia Mawardi, Mawardi; Siregar, Zufri Hasrudy; Nugraha, Yoga Tri; Rida, Rizkha; Fahri , Tengku Muhammad; Irwanto, Muhammad
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2049

Abstract

The results of experimental research on marine thermal power plants using a shell and tube heat exchanger made of copper-tin (Cu-Sn) alloy are the main focus of this study. This study uses a heat exchanger Scale Model measuring 60 mm wide x 1 meter long. The system operated using a closed cycle and Organic Rankin cycle. A simulation study has been carried out using Ansys CFD software to model new heat exchangers, namely models A and B. The interaction between ammonia and hot water produces thermodynamic values in the form of an evaporator outlet temperature of 28°C in models A and B 260C. The weakness of model B is that the turbulent flow is divided into left and right sides so that heat loss occurs in the flow corner area. The seawater inlet temperature of 29°C can heat the working fluid from the ammonia flow inlet from 5°C to 28°C, resulting in saturated steam reaching 5-6 bar.
Comparative Analysis of Creep Deformation in Ferritic Martensitic Steel Across BM, WJ, and HAZ Regions at 570°C Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2071

Abstract

Creep is a time-dependent deformation in which failure can occur in years. The probabilistic assessment was a typical method for predicting creep deformation. The prediction was conducted by extrapolating the short-time creep laboratory test to the long-time data. A small deviation of extrapolation data was expected. Hence, a large number of creep tests were needed, since deviations in material properties cannot be avoided, especially in welded materials. In this study, the creep strain rate of Gr-91 steel was compared among the base metal (BM), weld joint (WJ), and heat-affected zone (HAZ). Welded steel was manufactured by the tungsten inert gas welding method. The creep test was conducted for each of the BM, WJ, and HAZ specimens using a lever-arm-type creep machine, following ASTM E139. The homologous creep temperature was set at 570 °C for a series of constant load ranges from 250 to 160 MPa. The strain-time curves of BM, WJ, and HAZ were generated after the specimens were fractured. The trend line of the creep strain rate is then determined using Norton’s equation. The creep mechanism of BM, WJ, and HAZ was investigated based on the creep exponent and strain hardening coefficient obtained from Norton’s equation.

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