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Prosiding SNTTM
Published by BKS-TM Indonesia
ISSN : 30321972     EISSN : 26230313     DOI : -
Core Subject : Agriculture, Engineering,
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering
Prosiding SNTTM merupakan wadah bagi para peneliti dan praktisi tknik mesin untuk berbagi hasil riset, inovasi, serta perkembangan terbaru dalam bidang teknik mesin dan rekayasa. Prosiding menerima berbagai lingkup makalah terbaik dalam berbagai topik bidang teknik mesin, termasuk namun tidak terbatas pada: - Desain dan Manufaktur - Energi dan Konversi Energi - Material Teknik dan Metalurgi - Mekatronika dan Otomasi - Dinamika, Getaran, dan Kontrol - Transportasi dan Teknologi Otomotif - Termofluida dan Rekayasa Panas - Aplikasi Kecerdasan Buatan dalam Teknik Mesin
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 82 Documents
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Efek tegangan dan konsentrasi larutan asam sulfat pada Pembentukan burned anodizing pada proses anodisasi aluminum Foil Arsyad, Hairul; Marsing, Nurkhofifah
Prosiding SNTTM Vol 22 No 1 (2024): SNTTM XXII Oktober 2024
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/590785

Abstract

The surface engineering process involving electrochemical methods is the anodization process. Anodization is an electrochemical process that produces anodic oxide on the surface that can change the surface proper-ties. In the anodization process, burned anodizing and surface cracking during the anodizing process hurt the surface quality. This study tries to see the formation of an aluminum oxide layer that causes burned an-odizing and surface cracking by adjusting the voltage and concentration of the solution. This study uses aluminum foil as a sample and graphite as an electrode. Anodization is carried out by providing a voltage range of 8 to 16 volts at two H2SO4 solution 2M and 3M concentrations. Observations of surface character-istics include micro and macro surface structures, surface roughness, and surface morphology. Calculations of the burned area are also carried out for each treatment. The test results show that the percentage of burned area increases with increasing voltage and concentration. The smallest burned area percentage was obtained with a value of 4% for samples at a voltage of 8 Volts and a solution concentration of 2M. In con-trast, the maximum value was obtained, reaching 95% of the area burned on the surface for samples of 16 Volts at a concentration of 3 M. However, a tendency was obtained to decrease surface roughness with in-creasing anodization voltage in both the non-burned and burned areas. From the test results using SEM, it was also found that surface cracks occurred in addition to being burned on the surface
Fabrication of a working fluid filler for cooling photovoltaic module Supriyono, Toto; Omar, Ghazali; Tamaldin, Noreffendy; Sonawan, Hery; Novahardi, Mi’raj; Sidik, Fachrul; Sumartono, M. R.; Kasim, M. S.
Prosiding SNTTM Vol 21 No 1 (2023): SNTTM XXI Oktober 2023
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/590MAN

Abstract

This paper discusses manufacturing a special tool (Filler) to fill the working fluid of a photovoltaic module (PVM) cooler. PVM needs to be cooled because its performance is susceptible to temperature changes. An increase in PVM temperature can reduce its performance. Due to their low thermal resistance, heat pipes can be used as PVM coolers. The greatest heat release occurs through the evaporation process of the working fluid within the heat pipe. The filling of the working fluid into the heat pipe is carried out under vacuum pressure, so a special tool or a special filler is required so that the filling of the working fluid corresponds to the specified amount. The filler consists of a liquid reservoir (water tank and support), an isolation valve, a check valve, and a liquid transfer pipe. The manufacture of the filler has been performed in several stages, from material selection to fabrication and assembly of parts. The assembly of the parts of the copper material was performed using the brazing joint method, while for the thread parts, a seal tape was added, combining the top and bottom of the tank using epoxy glue. The water tank support and tables were fabricated using 3D printing. Copper pipes 12.7 mm (1/2 inch) were cut to obtain a length of 50 mm, as many as six pieces, for the acrylic pipe cut along 48 mm. The acrylic sheets were cut in a circle with a diameter of 60 mm, as many as two pieces, and holes and grooves in the middle, in sizes M6 and M16. After the cutting process is complete, assemble the filler parts by connecting the brazing, threading, and gluing processes. The support table has dimensions of 150 mm x 150 mm and a height of 125 mm made using a 3D printing process. The results of the filler function test show that the filler that has been made can be used to vacuum the heat pipe or PVM coolant and fill the working fluid according to the specified amount.
Pengaruh variasi tool dan pemanas terhadap hasil pengelasan friction stir spot welding pada material Alumunium AA1100 Saban, Muhamad Zaki; Erwin; Asyari; Pratama, Juan; Chan, Yefri; Susanto, Herry; Novendri, Yos; Budhi Susetyo, Ferry; Sugiyanto, Didik
Prosiding SNTTM Vol 22 No 1 (2024): SNTTM XXII Oktober 2024
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/590897

Abstract

Tujuan penelitian ini untuk menganalisis pengaruh variasi tool dan pemanas tambahan terhadap hasil pengelasan Friction Stir Spot Welding (FSSW) pada material Aluminium AA1100. Metode FSSW adalah teknik pengelasan solid-state yang memanfaatkan gesekan untuk menghasilkan panas, sehingga material dapat disatukan tanpa mencairkannya. Metode penelitian menggunakan variasi tool dan tambahan pemanas untuk mengamati perubahan terhadap hasil hasil pengelasan, parameter yang digunakan pada hasil pengelasan kekuatan tarik, penetran dan struktur makro pada area las. Hasil penelitian menunjukkan bahwa variasi tool dan penggunaan pemanas tambahan secara signifikan mempengaruhi kualitas pengelasan. Tool yang berbeda memberikan variasi dalam kekuatan dan kekerasan hasil las, sementara penerapan pemanas tambahan meningkatkan homogenitas struktur makro serta memperbaiki kekuatan dan kekerasan pada area las. Penelitian ini memberikan wawasan mendalam mengenai optimasi proses FSSW pada material Aluminium AA1100, serta memberikan rekomendasi untuk peningkatan kualitas hasil pengelasan.
Maximum stress and deformation of coal flow breaker plate due to continuous loading Lubis, Asnawi; A. Hadi, Kiagus; Akmal, Jamiatul; Hasymi, Zulhendfri
Prosiding SNTTM Vol 22 No 1 (2024): SNTTM XXII Oktober 2024
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/590781

Abstract

Vibrating screens are very important equipment in the coal mining and processing industry. One of the components of this vibrating screen is a flow breaker plate, which functions as a flow breaker for the coal bulk load before it falls on the vibrating screen. Due to the impact load of coal bulk, which works continuously, the plate often breaks in fatigue with a maximum stress and deformation greater than those if the load were worked statically. This paper presents the results of a finite element study on the maximum stress and deformation that occur in various materials used as coal flow impact load breaker plates at PT Bukit Asam Pelabuhan Tarahan, Bandar Lampung. The plate construction is modeled as beams with fixed ends. The length and height (as a beam) are 1500 and 200 mm, respectively, while the plate thickness (beam width) is analyzed to be 15 and 20 mm for each type of material. Four types of materials available at PT Bukit Asam, namely ST37, ST52, Hardock (HB400), and GS20 Mns, were analyzed for impact loads using ANSYS Explicit Dynamics. The results of the finite element analysis show that the ST37 material, with a thickness of 20 mm, experiences the smallest maximum stress compared to the other three types of material. Meanwhile, for deformation, the analysis results show that ST52 material with a thickness of 20 mm experiences the smallest maximum deflection compared to the three other types of material. 
Development of synthetic graphite for reactor fuel, moderators, and nuclear reactor components: A literature review arif, Syaiful
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/srrh5h58

Abstract

Graphite has been used as a moderator material in nuclear power stations and is considered a potential material for use in future Generation IV advanced reactors. Graphite has excellent thermal-mechanical and neutron moderation properties, and therefore, it is currently used as a structural core component and nuclear fuel in High Temperature Gas Cooled Reactors (HTGR). Synthetic graphite with higher specific capacity and superior cyclic life is prepared by high-temperature graphitization of anthracite coupled with effective catalysts. In the graphitization process, thermodynamically unstable carbon atoms regularly change from a disordered structure to a graphite crystal structure through thermal activation. However, the graphitization process needs to be carried out at a high temperature above 2800 °C. Common raw materials include pyrolysis coal tar and carbonized and calcined carbon materials. Literature studies show that the selection of coal as the raw material to be synthesized affects the final properties of graphite, such as purity, homogeneity and microscopic structure. This comparison of raw materials provides insight into which materials are most efficient and economical to use in the production of synthetic graphite. A spectrum fitting methodology is developed. Next, SEM observations of the irradiated materials are performed. to compare the reactor performance by evaluating the critical numbers for systems using a two-phase composite moderator (magnesia matrix with a moderated phase containing beryllium or retained hydrides) relative to the case of a reference graphite moderator. Depending on their properties, different nuclear grades of graphite are used for HTGR. Given their excellent mechanical properties, IG-110 and PGX graphite grades are used for core structural components such as fuel blocks and permanent reflector blocks, while A3-3 heavy fraction graphite/resin mixtures are used as matrix components in TRISO fuel compaction due to their high absorption of fission products such as Cs and Sr. The accumulation of strong neutron absorbers in graphite lowers the cavity reactivity coefficient, but it remains positive. Despite the loss of excess reactivity in the core, the presence of strong neutron absorbers in graphite is beneficial from a safety point of view
A Compact oxygen concentrator for premature infants: Integrating portability and performance in the third-generation prototype Vianney, Cornelia Christiani; Koestoer, Raldi Artono; Whulanza, Yudan; Hakim, Imansyah Ibnu
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/zs2cbg95

Abstract

Oxygen concentrators are vital devices in medical oxygen therapy. It provides supplemental oxygen, extracted from the environmental air, to patients suffering from hypoxemia or other clinical conditions characterized by low blood oxygen saturation. The need for oxygen therapy extends across various patient populations, including adults, children, and neonates, especially premature infants. However, commercially available concentrators are usually designed for adults, making them unsuitable for premature infants whose delicate, underdeveloped organs can be harmed by high oxygen levels. Meanwhile, field observations from the Indonesian Incubator Team indicate frequent demand for supplemental oxygen following hospital discharge. To meet the urgent need for a suitable device, especially for premature infants discharged from hospitals, this study describes the design and development of a compact, portable, and neonatal-specific oxygen concentrator. A reverse engineering approach was adopted through a three-phase prototyping process. The first prototype verified the feasibility of the pressure swing adsorption (PSA) principle as the main process of the oxygen concentrator. The second prototype integrated a complete system to evaluate performance by measuring flow rate and oxygen concentration and adjusting components to achieve optimal results. The final, third prototype refined the design to improve compactness and portability. The device achieved an oxygen concentration of about 40% oxygen purity with a steady flow rate of 2 L/min. This developed oxygen concentrator presents a significant step forward in neonatal care, providing a tailored and accessible solution that can support widespread use in home-based infant healthcare programs.
Impact of ply arrangement on the mechanical properties of luffa cylindrica/fiberglass reinforced polyester hybrid composites Raharjo, Wijang Wisnu; Yossa Aulia, Ardhana; Wibowo
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/kep5fv78

Abstract

Hybrid composites are engineering materials that combine two types of reinforcing fibers to achieve superior mechanical properties. The study aims to evaluate the effect of fiber layer arrangement on the flexural strength and impact toughness of hybrid composites based on unsaturated polyester resin (UPRs) reinforced with Luffa cylindrica fibers and fiberglass. Five types of stacking configurations were tested: Luffa–Luffa (LC-LC), Luffa–chopped strand mat (LC-CSM), chopped strand mat–Luffa (CSM-LC), Luffa–woven roving (LC-WR), and woven roving–Luffa (WR-LC). Flexural testing was conducted according to ASTM D790, while impact testing followed the Izod method based on ASTM D5941. The results show that the LC-WR configuration achieved the highest flexural strength of 107.723 MPa, whereas the WR-LC configuration yielded the highest impact strength of 50.49 kJ/m². Placing the fiberglass layer on the tensile side significantly increased flexural strength, while its placement on the compressive side demonstrated superior impact energy absorption. These findings underscore the critical role of fiber stacking sequence in determining the mechanical properties of hybrid composites, which can be optimized based on specific structural application requirements.
Design and development of a low-cost two-point bending tester for bamboo culm sheaths Kusumaningtyas, Indraswari; Wirabuana, Jalu Akbar; Baharsyah, Al Hafid; Parikesit, Gea Oswah Fatah
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/y4ket639

Abstract

Sound generation in musical instruments depends on the instrument’s material properties. This is not yet completely understood for the bundengan musical instrument because the material properties of the bamboo culm sheath (slumpring in Javanese) that covers the bundengan’s woven structure are unknown. The dominant vibration mode of the bundengan is transversal; thus, the bending modulus of elasticity is required. Bamboo culm sheaths are thin, lightweight, and relatively fragile, so they must be characterised by a bending tester that can deliver a small enough force at a constant deflection rate. This is essential to obtain sufficient data within the material’s elastic region before the bamboo culm sheath breaks. It was observed that there are similarities between the structure of bamboo culm sheaths and corrugated paperboard. Therefore, a two-point bending tester was designed and developed based on the bending test standards of paper and paperboard. The design process comprises needs identification, design specification, and conceptual, preliminary, and detailed design. A prototype was then developed, calibrated, and tested. Tests with specimens made from thin aluminium plates gave a bending modulus of 75.15±5.90 GPa and 74.59±2.55 GPa for deflection angles of 5.4° and 15.3°, respectively. This indicates that the two-point bending tester can perform repeated tests with relatively good precision and accuracy, so that it can be further used to test bamboo culm sheaths.
Aerodynamic effect of windbreak on the crosswind phenomenon on a high-speed train Harinaldi, Harinaldi; Ramadhan, Naufal P
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/xk93bt57

Abstract

Crosswind greatly affects the aerodynamic performance and operational safety of the high-speed train. Windbreak is one of the windproof facilities commonly used for high-speed trains in windy areas. This study aims to see how variations in windbreak height (3.8 m; 4.4 m; and 5.2 m) can affect the aerodynamic performance of high-speed trains. 3 aerodynamic coefficients (drag, lift, and rolling moment) of the HST were compared when the train passed the track under the same conditions using the ANSYS FLUENT CFD simulation. Sudden changes in aerodynamic loads can be seen from the visualization of the pressure contour. First, the aerodynamic coefficient of the train will decrease significantly when the train begins to enter the windbreak. Second, the ‘IN’ process of the windbreak track has a larger aerodynamic load fluctuation than the ‘OUT’ process. Third, the height of the windbreak does not significantly change the trend of the aerodynamic coefficient graph, there is only a phase difference and the magnitude of the amplitude formed. The highest average drag and lift coefficient occurs at a height of 5.2 m, which is 0.29 and 0.011. Meanwhile, the highest average rolling moment coefficient occurs at a windbreak height of 3.8 m, which is 0.0028
Pengaruh sisi aliran masuk terhadap prestasi pompa sebagai turbin dengan jumlah sudu bervariasi Asral
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/jwzr6s38

Abstract

Pump as Turbine (PAT) is an innovative solution in generating small-scale electrical energy in rural areas. However, the performance of PAT is strongly influenced by the configuration of the impeller, especially the number of blades that can affect the efficiency and electrical output power. Therefore, this study aims to analyze the effect of inflow and variation in the number of impeller blades on the performance of PAT as a picohydro power plant. This research was conducted experimentally in the laboratory using three different types of impellers, each having 9, 10, and 12 blades. Tests were conducted at various levels of valve opening ranging from 50%, 66.6%, 83.3% and 100% opening. The test results were then analyzed based on system efficiency, water flow rate, and electricity generated. The results showed that the impeller with the number of blades 10 produced the highest efficiency which reached 78% at 100% valve opening, while the impeller with the number of blades 12 showed the lowest efficiency due to greater water flow resistance. The highest electrical power is generated by the number of blades 10 with an output of 258.74 Watts. Thus, the selection of the optimal number of blades is very important to improve the performance of PAT as an efficient and economical renewable energy solution

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