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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Analisis kekuatan impak komposit serat batang pohon waru (Hisbiscus tiliaceus) Muhammad irwan; Aras, Neny Rasnyanti M
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.439

Abstract

Environmental conscious technology, or green technology, has become a significant focus for countries worldwide. The development of environmentally friendly materials is a top priority, and it is a major concern for researchers who continue to conduct studies to support the advancement of green technology. Research on the Hibiscus tiliaceus tree bark fiber (known as 'waru' in Indonesian) has become relevant in this context. These fibers have undergone treatment with NaOH and turmeric and are utilized as reinforcements in composites or combined with epoxy resin. This study aims to empirically assess their mechanical properties and is expected to provide valuable insights into the application of green and environmentally friendly technology. The objective of this research is to identify the effects of various treatments. These treatments include immersing the fibers in a NaOH 5% solution for 2 hours, heating the turmeric in a 20% solution to a temperature of 70-80°C, followed by a 2-hour incubation, as well as immersing the fibers in a NaOH 5% solution for 2 hours, followed by heating the turmeric in a 20% solution to 70-80°C for another 2-hour period, with respect to the bending strength of the waru tree bark fiber composites. Impact testing is conducted using ASTM 256, and the results show that the best impact energy, with the highest fracture energy, is achieved with the specimen that underwent the NaOH 5% solution treatment for 2 hours, reaching 2.142 Joules. The best impact strength was observed in specimens without any treatment, with a value of 1.529 Joule/mm².
CFD (Computational Fluid Dynamic) untuk menganalisis head loss akibat perubahan diameter Nur Hayati; Adi Purwanto; Erwan Muladi
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.441

Abstract

Piping systems with many supporting components are used to drain water. Connections or elbows result in head loss, namely the loss of flow in the system. Headloss is the loss of flow energy which is significantly affected by flow velocity. This study aims to analyze head loss due to variations in elbow diameter. The elbows used have diameters of 1, 2, 4, and 6 inch. Based on the simulation results and the results of nomograph calculations using the ASME B16.9 B16.28 standard, it can be seen that head loss decreases with increasing elbow diameter. The simulation results show similar results to the calculations from the nomograph.
Optimalisasi dan pengembangan mesin penggembur tanah inovatif untuk meningkatkan produktivitas lahan kering Ahmad Nurul Muttaqin; Uswatul Hasanah Mihdar; Rusdi Nur
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.449

Abstract

The creation of a soil-loosening device that works well on dry terrain is the goal of this study. With this equipment, perhaps, human labor in construction and agriculture will be reduced and productivity will rise. In the machine assembly process, virtual assembly is carried out using Autodesk Fusion 360 software prior to the actual assembly phase. During assembly, the mounting frame for the combustion engine is joined to the main frame. Furthermore, sprockets are mounted on the two axles and wheels, and belt tensioners are added. This machine's blade is used to swiftly loosen the dirt. An area of thirty square meters was tested by machines on dry land, and each test took an average of 229.3 seconds to complete. The machine's time efficiency is greater than that of the earlier variants. In addition, factors including longevity, running costs, simplicity of maintenance, and environmental effect need to be carefully considered in this study. This development tool has a great deal of potential to improve the efficiency and productivity of the dry land soil loosening process. The research findings are expected to contribute to technological advancements in Indonesia's building and agriculture sectors.
Analisis pengaruh tinggi bilah terhadap performa dengan airfoil NACA 0012 pada turbin angin sumbu vertikal tipe darrieus-H di Jawa Barat Raditya Elfa Pratama; Marno; Aripin
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.456

Abstract

The wind turbine that has the best performance for urban areas with easy maintenance is the Darrieus-H Vertical Axis Wind Turbine (TASV). The purpose of this study was to determine the characteristics of the NACA 0012 airfoil, to determine the effect of blade height on TASV performance, and to obtain the optimum blade design. The method used in this research is the simulation and analysis method. Wind turbine simulations and analysis were carried out using Microsoft Excel software to process data, Rotor DMS Simulation on Qblade to determine airfoil characteristics and analyze wind turbine performance, and Ansys FLUENT to determine fluid flow that occurs in the blades. In this study, with regional conditions in West Java having an average wind speed of 6.83 m/s and a maximum wind speed of 10 m/s, simulations and analysis with several variations in height obtained the results that the Darrieus Vertical Axis Wind Turbine (TASV) blade H has the same maximum Coefficient Power (Cp), which is 73% at a TSR of 4.5. In the study, also with a 300 W generator, the optimum blade height was obtained, which has a design of 0.7–1.1 meters with a power generated of 99.8–492 W with a torque of 1.72–5.80 Nm at a rotor rotational speed of 55.05–85 rad/s.
Analisis pengaruh variasi jumlah pelapisan dan jarak pelapisan spray coating pada baja AISI 1020 terhadap kekasaran dan laju korosi dengan media air garam Iqbal Rizky Setyawan; Afira Ainur Rosidah
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.463

Abstract

AISI 1020 steel is a low carbon steel commonly used for ship hulls. The disadvantage of steel is that it corrodes easily. One way to slow down the rate of corrosion is by coating. Coating or plating is the method most often used to slow down the corrosion rate because it is more effective, easy to apply. This research aims to determine the effect of the number of coatings and the spacing of spray coatings on surface roughness and corrosion rate. Variations used are variations in the amount of coating 1 layer, 2 layers, dan 3 layers, also variations in coating distance of 10 cm, 15 cm, and 20 cm. The method used to calculate the corrosion rate is weight loss. The results showed that the best roughness on the 3-layer with 10 cm specimen was 0.857 μm and the lowest corrosion rate was on the 3-layer with 20 cm specimen with a value of 2.376 mpy. The best distance for coating is not too close and not too far. If the distance is too close, the paint will melt (runs) and the amount of paint that sticks will be too large, so the layer will be too thick and smooth. The coating distance that is too far causes the paint to stick a little and causes the paint to dry before it sticks to the media, so that it becomes thin and rough. The more the number of coatings, the better it inhibits the corrosion rate.
Studi potensi listrik dari hembusan angin luaran air conditioner Gian Villany Golwa; Fajar Anggara; Imam Hidayat
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.464

Abstract

The utilization of air conditioners (AC) will consume a lot of electricity in the world. According to the predictions of the International Energy Agency (IEA) electricity consumption for AC will be the main trigger for soaring world electricity demand in 2050. Data from the Central Statistics Agency (BPS) in March 2017 showed 7.98 percent of households in Indonesia use AC. The wind speed coming out of the condenser in an AC with a capacity of 0.5-2 PK has an average speed of 4.83 m/s. This research will test the potential electricity that can be generated from air blowing from an AC with 2 types of generator prototypes. Both types of generators will be tested directly on the AC exhaust unit. The test results show that with an average wind speed of 4.83 m/s, the vertical blade generator with 12 blades installed can produce up to 7 volts, and on the horizontal blade generator with 6 coils, each coil has 300 turns, the voltage is up to 14.82 Volts. The conclusion from this research is that the horizontal blade generator is sufficient to supply electricity to the battery before consumption.
Persentase perbandingan bahan bakar campuran cangkang dan fiber kelapa sawit terhadap unjuk kerja boiler di PKS PTPN V sei galuh Sri Andriansyah Andri; Rafil Arizona
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.466

Abstract

This study discusses the percentage comparison of fiber and palm shell fuel mixtures by having several different percentages, so that the best percentage of fuel for boiler performance is obtained. In this case the calorific value of the fuel plays an important role in determining the efficiency of the boiler, where the higher the calorific value, the less fuel is used. So that it greatly affects the performance of the boiler and is more economical in saving fuel. Retrieval of boiler data at PKS PTPN V Sei Galuh. In the form of fuel composition and boiler unit parameters obtained using water and steam properties software which is then carried out research to find the best percentage of boiler fuel. Based on the results of the research that has been done, the best results are obtained at the percentage of 75% fiber fuel and 25% palm shell with 86% efficiency, fuel consumption of 759 kg/hour, boiler capacity of 40.091,8 kg/hour, consumption combustion air of 8.500,401 kg.air/kg.fuel, and the heat generated is 23.213.235,24 kcal/hour or 23.21×106 kcal/hour. With the results of this study, the boiler can produce electrical energy of ± 1 Megawatt with electricity requirements to run the entire performance of the machine for one day of ± 0,8 Megawatts.
Performa motor bakar satu silinder dengan variasi oktan bahan bakar dan tekanan kompresi Bahtiar Rahmat; Mohammad Burhan Rubai Wijaya; Yuris Bahadur Wirawan; Fahmy Zuhda Bahtiar
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.468

Abstract

The performance of an internal combustion engine was greatly influenced by several factors, including the quality of the fuel and the compression pressure of the engine. High compression pressure, followed by the selection of the appropriate fuel octane number, would result in optimal performance. Conversely, an engine with a high compression pressure given fuel with a low octane number would produce poor performance. Unfortunately, only few users know that high compression engines require fuel with high octane numbers. The purpose of this study was to determine the difference in the power & torque output of single-cylinder combustion engine given variations in compression pressure using pertamax (RON 92) & pertamax plus (RON 95) fuel. A dynamometer test has performed to determine the difference in engine performance. The results showed that the engine with high compression pressure (11.8 kg/cm2) with RON 95 fuel produced the highest power output of 7.5 kW with the highest torque output of 9.6 Nm. While the engine with low compression pressure (10 kg/cm2) using RON 92 fuel produced the lowest power output of 4.2 kW with the lowest torque output of 3.8 Nm.
Formulasi dan fabrikasi biofoam dari limbah padi sebagai pengganti styrofoam kemasan makanan dengan menggunakan teknik thermopress Willy Ivan Lucky; Ahmad Nayan; Nurul Islami; Abdul Rahman
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.469

Abstract

Styrofoam as food packaging has a bad impact on the environment and the human body because it is made of benzene compounds. The purpose of this research is to look for environmentally friendly and safe food packaging alternatives in the form of biofoam made from waste rice plants and tapioca flour as natural adhesives. The biofoam fabrication process as food packaging is done by mixing straw waste that has been mashed with tapioca solution until it is homogeneous and has a higher viscosity, and then printing using a tool. Thermopress uses a pressure of 9,801 MPa (100 kg) with a temperature of 120°C for 14 minutes of pressing. The variations used are the use of mesh 40, 60, and 80 for the level of roughness of rice straw that has been treated in a crusher. The results of Biofoam testing with the three mesh variations 40, 60, and 80 can decompose inside soil for 28 days, and the results of testing with a mesh of 40 found low water absorption resistance with a weight gain of 36%, and the heat resistance test experienced a weight gain of 1.681%, meanwhile, biofoam with a mesh of 60 has added weight after testing water absorption of 23%, and the heat resistance test has a weight gain of 1%. And on biofoam with mesh 80, there was a weight gain after testing water absorption of 15% and resistance to heat with an increase in weight of 1%.
Pemanfaatan limbah bunga pinus menjadi bio-oil dengan penambahan variasi konsentrasi katalis Mo/lempung menggunakan metode pirolisis Ramlan Manullang; Arif Rahman Saleh; Rany Puspita Dewi
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.481

Abstract

In the modern era, the high energy consumption associated with technological advancements poses a potential energy crisis due to the finite nature of fossil fuel resources. One explored solution is the utilization of renewable energy through biomass conversion. This study aims to convert pine flower waste into bio-oil via pyrolysis with the assistance of Mo/clay catalysts, to investigate the effect of Mo/clay catalyst addition on the resulting bio-oil yield, and to analyze the physical characteristics of the pyrolyzed pine flower waste bio-oil in comparison with conventional diesel fuel. Various catalyst concentrations 0% (without catalyst), 7%, 9%, and 11% with Mo loading of 1% of the catalyst mass, were employed. Pyrolysis was conducted at a temperature of 320°C for 120 minutes under oxygen-free conditions, followed by distillation to remove water content from the bio-oil. The results of the study demonstrate that the addition of Mo/clay catalyst positively influences the bio-oil yield and its physical characteristics. The optimal results were achieved at a catalyst concentration of 9%, resulting in a density of 1.008 g/ml, viscosity of 49.603 cSt, and calorific value of 8,266.4981 cal/g. However, the pine flower waste-derived bio-oil has yet to be directly employed as a substitute for conventional diesel fuel.

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