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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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Investigasi keandalan heater dan cooler fasilitas simulasi sistem pasif-05 (FASSIP-05) berdasarkan hasil komisioning tahap pertama Iwan Roswandi; Hyundiyanto Arif Gunawan; Arif Adtyas Budiman; Hilman Adrian; Sanda; Mulya Juarsa
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.v18i2.495

Abstract

The Daiichi Nuclear Power Plant accident in Fukushima, Japan 2011 gave urgency to developing a passive nuclear reactor cooling system, especially in terms of thermal management innovation. The laboratory has conducted research and development of passive cooling systems by building several small to large-scale experimental facilities, one of which is the FASSIP-05 Pressure Rectangular Strand. It is necessary to commission the facility to define operating limits before use. This research aimed to determine the reliability of the heater and cooler components. The commissioning method is carried out by turning on the heater at a maximum power of 4000 W, then stopping when it reaches the temperature set points at 60°C, 70°C, 80°C, and 90°C. The commissioning results show that the heater can reach the set point conditions well, changing the initial temperature of 26°C to 90°C in 2282 seconds with a data confidence level (R2) of 0.9965 and the lowest overshot of 1.1% when it reaches steady state. The ability of the system to maintain the temperature set point for 3 hours was found to be very good with an average of 60.16°C, 70.10°C, 80.09°C and 89.92°C. The results of heat absorption still require improvement, with the lowest value reaching 217.71 W (5.4%) and the highest at 465.56 W (11.64%), which causes a significant heat loss. Cooling reliability needs to be improved. Cooling the tank from 27.26°C to 16.69°C takes 4501 seconds, with an average temperature increase of 0.00235°C/second. The reliability of heat absorption at steady state is 4.0617°C and the highest heat absorption capacity is only 0.37 W.
Analisis rugi kalor selama proses pemanasan pada semi-spherical plenum stainless steel 316 berdasarkan perubahan setting suhu pemanasan Zavi Indasyach Moreno; Ronald Akbar; Almira Citra Amelia; Hilman Adrian; Jeff Michael Johanes; Putut Hery Setiawan; Hyundianto Arif Gunawan; Ragil Sukarno; Darwin Rio Budi Syaka; Mulya Juarsa
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.v18i2.498

Abstract

Reactor core melting in a semi-spherical geometry has released heat during severe accidents in nuclear reactors, where the heat-dissipating characteristics need to be studied. So, the study aims to determine the temperature distribution phenomenon and the heat loss rate in stainless steel 316 semi-spherical. This study used a semi-spherical plenum to simulate nuclear reactor debris by experimental methods. Experiments were carried out using four temperature variations from 50oC, 100oC, 150oC, and 200oC. The measuring instrument used is a K-type thermocouple that has been installed at 14 predetermined points. Data taken are the process of increasing and decreasing the temperature in the semi-spherical plenum and the value of the heat loss rate. Based on the experimental results, it was found that the characteristics of the increase and decrease in temperature during the heating and cooling processes at each thermocouple point tended to be the same. Heat loss values that were obtained at temperatures of 50oC, 100oC, 150oC, and 200oC were 354.235 watts, 670.714 watts, 1442.303 watts, and 2064.727 watts. The value of the heat loss will increase in proportion to the size of the setting temperature. The heat loss rate value for all experiments exceeds 50%.
Sistem inventory pengendalian persediaan fast moving spare part dump truck barbasis metode min-max stock Nurul Hidayati; Braam Delfian Prihadianto
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.v18i2.503

Abstract

Maintenance management encompasses a series of activities that include planning, directing, implementation, control, and evaluation aimed at improving the condition of specific facilities to achieve predefined targets. This research aims to analyze the demand levels for fast-moving spare parts in dump truck units, determine the minimum and maximum spare parts inventory levels required in the warehouse, and provide recommendations to PT AHG regarding spare parts inventory management based on the min-max method with the development of a safety inventory information system. In the company's previous management, no systematic approach was applied to address these fluctuations, and it needs to be developed through a more adaptive method. The research methodology employed is quantitative, integrating inventory management with other policies, including observation, interviews, and data collection and processing. The data used includes spare parts usage data from January to December 2022, focusing on oil filters, fuel filters, and brake pads in dump truck units. The analysis results indicate significant fluctuations in the demand levels of fast-moving spare parts in dump trucks throughout the period from January to December 2022, especially at the beginning and end of the year. These fluctuations are likely influenced by seasonal factors, holiday periods, and the requirements of new projects affecting the demand for spare parts in maintenance and repair activities.
Uji kinerja mesin bensin 110 cc sistem injeksi mekanis berbahan bakar gas LPG Marthen Paloboran; Haruna; Syafiuddin Parenrengi; Faizal Amir; Asrul
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.v18i2.504

Abstract

This research is experimental research using a 110 cc petrol engine with a chassis type dyno test measuring instrument. This research aims to determine the performance and exhaust emissions when using LPG and pertalite gas. The engine speed variation in this research is 2500-5000 rpm. Data collection techniques use observation techniques to record the test results obtained. The data analysis technique uses descriptive analysis to present research results. As for the research results from the engine performance analysis, it was found that there was an increase in engine performance at each engine rotation, the lowest power was obtained when using LPG gas fuel at 2500 rpm of 2.22 kW and pertalite fuel of 2.73 kW. Meanwhile, the highest power was obtained when using LPG gas fuel at 5000 rpm of 4.88 kW and using pertalite fuel of 4.81 kW. However, for fuel consumption, the lowest consumption was obtained when using LPG gas. Meanwhile, for exhaust gas emission analysis, it was found that there was a decrease in emission levels when using LPG gas. It was found that CO and HC exhaust emissions increased as the engine speed increased, so emissions decreased further. However, CO2 gas emissions increase with each engine rotation compared to using LPG gas.
Simulation of performance enhancement of heat exchanger with twisted tapes using ANSYS software Taufik Ramadhan Fitrianto; Suhanan
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.v18i2.454

Abstract

Heat transfer effectiveness in a heat exchanger depends on the fluid flow through the exchanger. The heat transfer coefficient is directly proportional to the Nusselt number of the fluid flow. A higher Nusselt number indicates a greater heat transfer rate. The enhancement of heat transfer quality can be achieved by increasing the surface area for heat transfer, disrupting the boundary layer, and inducing swirl flow in the fluid. Twisted tape inserts are used in the heat exchanger to induce swirl flow. In this simulation, six types of inserts with a length of 2000 mm, width of 35 mm, and twist ratios of 2.5, 5.0, 7.5, 10, 12.5, and 15 were used. The mass flow rates of the fluid used were 0.4 kg/s, 0.6 kg/s, and 0.8 kg/s. The simulation was conducted using the ANSYS software with the Computational Fluid Dynamics (CFD) subprogram. The simulation results showed different flow patterns in each experiment. As the number of twists in the twisted tapes increased, the vortex flow in the fluid also increased. The highest performance was observed in the experiment using the twisted tape insert with 15 twists and a mass flow rate of 0.8 kg/s.
Pengaruh volume gas argon terhadap kekuatan tarik pada pengelasan GTAW SUS 201 Andhika Hendrawan Febrianto; Am Mufarrih
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.v18i2.480

Abstract

Gas Tungsten Arc Welding (GTAW) is an arc welding process that uses a non-melting electrode. The GTAW welding process is carried out by melting the filler rod onto the object to be welded. The GTAW process on stainless steel materials, especially the SUS 201 type, has not yet obtained optimum joint strength. Therefore, it is necessary to have a research study on the tensile strength of GTAW welding results on SUS 201. The purpose of this study is to determine the effect of argon gas volume on the tensile strength of GTAW welding joints of SUS 201 material. Using experimental methods and data analysis using ANOVA. The independent variable used was the volume of argon gas, there are 5, 10, and 15 l/minute with three replications and the dependent variable was tensile strength. The results of this study indicate that the volume of argon gas has a significant effect on the tensile strength of GTAW welded material SUS 201. The maximum tensile strength value of GTAW welded with 15 l/minute argon gas volume is 630.86 MPa and the lowest value is found at 5 l/minute argon gas volume of 499.46 MPa. The greater the volume of argon gas, the greater the tensile strength. From the observation of the microstructure it is known that the volume of argon gas is 5 l/minute, the ferrite microstructure is more dominant than perlite, so the minimum tensile strength is stated. Meanwhile, at the volume of argon gas 15 l/minute, the microstructure of perlite is more dominant than ferrite, so the maximum tensile strength is stated.
Analisis desain stamping die menggunakan FTI forming suite Nanang Ali Sutisna; Vicky Gufron Afandi
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.v18i2.509

Abstract

This study was conducted on stamping die design for one of the car body parts using the FTI Forming Suite software. In general, the design process of existing stamping dies in the observed companies involves seven to ten trials before obtaining an acceptable die, which consequently increases the cost of the die. By using the software, it is expected that the number of trials will be reduced because the design is analyzed first to identify unwanted defects in the stamping process, such as wrinkles, splits, and springbacks. The study begins by comparing the stamped parts with the design. Using a 3D scanner, the geometry of the parts is obtained and compared to a original 3D CAD model to check for deviations of the parts from the original design. Comparison between the stamped parts and the original design shows discrepancies. This is most likely because the design has been modified to prevent stamping defects. Furthermore, the original design is simulated by applying a blank holder force of 109.7 kN. The first simulation on the original design showed that the thickness strain was -14.4% and had a strong wrinkling tendency, therefore the modified design was then simulated again on this modified part design. Modifications mainly focused on the essential corner radius, as well as on the blank holder force to 129.2 kN to prevent wrinkling and reduce springback. The second simulation produces good formability as shown by the forming limit diagram (FLD), safety zone, and better springback, even though the minimum thickness strain increases to -19.2%. Thus, by using simulation software, the correct die geometry can be obtained prior to die making to avoid unnecessary die modification costs during the trial run. In addition, the number of trials can be minimized so that the lead time for stamping dies production is shortened.
Sistem monitoring tegangan, arus, dan suhu pada unit alat berat berbasis internet of things di PT Armada Hada Graha Yudanur, Andhiko Yerintra Djafniel; Sugiyanto
Jurnal Teknik Mesin Indonesia Vol. 19 No. 1 (2024): 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.v19i1.346

Abstract

Heavy equipment needs batteries to run their systems such as starters, lights, and other electrical components. The problem that often occurs is that the operator does not know and rarely monitors the condition of the battery. Based on these problems, a monitoring system for voltage, current, and battery temperature was made on the Internet of Things-based heavy equipment unit. This tool uses the NodeMCU V3 board and Arduino Uno as a microcontroller. The sensors used are voltage sensors, current sensors, and temperature sensors. The step-down function is to reduce the 12 V battery voltage to 3.3 V – 5 V for power supply to the microcontroller. Real time clock is selected as the source of time data in this system. The firebase server is selected for the process of receiving data to be more practical through its features and the received data is stored in a spreadsheet. Supporting data display on this system uses an LCD and MIT APP Inventor software, where data is displayed in a face-to-face application. The test results show that the reading of the voltage value by the sensor has an average error of 0.43%, the reading of the current value by the sensor has an average error of 4%, the reading of the temperature value by the sensor has an average error of 0.05%, the average of sending data sending time using the NodeMCU V3 board to be recorded on a spreadsheet is 11.23 seconds, and the results of the comparison of the data on the spreadsheet and the LCD in the three units show that there is no difference.
Rancang bangun alat cutting wire dengan kontrol CNC untuk meningkatkan tingkat presisi dan efisiensi bahan baku menggunakan software max 3 Widiyanto, Sigit; Saputra, Alfian Ady; Wiguna, Gun Gun; Prayitno, Pungkas
Jurnal Teknik Mesin Indonesia Vol. 19 No. 1 (2024): 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.v19i1.420

Abstract

The CNC machine is a development of a conventional machine tool, in which control changes from manual to automatic, by following a program that has been made. There are many types of tools for cutting wire, and some even still use simple tools and operate manually. What will be discussed in this study is a method with several stages including finding the cutting force, material diameter, pneumatic cylinder diameter to be used, required motor power, tension in the frame and welding joints. In this design, the material to be processed is copper wire with a tensile strength of 200 N⁄mm2, the cutting force to be used is 402 N, with a pneumatic cylinder diameter of 44 mm (used is 50 mm size), the motor power used is 0.039 kW or 39 W (the power of the motor is 48 W), the shaft to be used is 6.3 mm in diameter, the connection to be used is in the form of a threaded thread with type M4 said to be safe because Sf on the thread is 6 (< 11.17), the frame material to be used is SS400 iron, it is said to be safe because on the pillar frame (1) is 0.047 N)⁄mm2 (< 39.2 N⁄mm2), and for the sectional frame (2) is 0.774 N⁄mm2 (< 40.18 N⁄mm2), the connection using welding is said to be safe because in the frame (1) is 6.96 N⁄mm2 (< 91.63 N⁄mm2), and in frame welding (2) is 0.0469 N⁄mm2 (< 91.63 N⁄mm2).
Analisis keausan slewing gear 242-UB1 area unit ship unloader PT Solusi Bangun Indonesia Tbk Fikry Alvianto Kurniawan, Fikry; Kurniawan, Stephanus Danny; Handoko; Prihadianto, Braam Delfian
Jurnal Teknik Mesin Indonesia Vol. 19 No. 1 (2024): 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.v19i1.440

Abstract

Ship Unloader is a unit of equipment to move materials from marine units to other units related to the production process by performing travel movements by slewing gear components. The problem of damage in the slewing gear began after inspecting and replacing components. The gear tooth on the slewing gear experiences abnormal wear. This study aims to analyze the wear of the slewing gear component 242-UB1 in the Ship Unloader unit area at PT Solusi Bangun Indonesia Tbk. The research methods are field surveys, data collection, and fishbone diagrams. Research materials and tools include dial indicator, filler gauge, lead wire, slewing gear components, and vernier calliper. Data was obtained from monitoring the unit and equipment with RCA analysis. The analysis showed that backlash was a significant contributing factor to wear with the worst value of 2.0 mm. In addition, the percentage of wear on the top gear reached 25%, which means it has reached the red zone limit. How to reduce potential wear due to backlash by regular monitoring of the backlash gap online through sensors. In conclusion, the study revealed that component wear is closely related to the backlash phenomenon. In addressing this issue, regular monitoring, timely repairs, and selection of appropriate materials and lubricants are considered as measures that can reduce wear potential and increase component life.

Page 22 of 30 | Total Record : 291

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