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INDONESIA
Jurnal Teknik Mesin
Published by Politeknik Negeri Padang
ISSN : 18298958     EISSN : 26555670     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 204 Documents
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Pengaruh Variasi Konsentrasi Metanol Terhadap Karakteristik Bahan Bakar Biogasoline Berbahan Baku Limbah Plastik Hasil Pirolisis Sidabutar, Rotama Arifin; Siahaan, Enzo W.B; Sitanggang, Hodmiantua
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1522

Abstract

The increasing volume of plastic waste and the depletion of fossil fuel reserves have encouraged the search for renewable energy alternatives. This study examines the use of the pyrolysis process on plastic waste to produce biogasoline and optimises the characteristics of the fuel by adding methanol concentration. The pyrolysis process, conducted at 3500C, produces plastic oil, which is then mixed with methanol in various concentrations (5%, 10%, 20%, and 30%). The effect of methanol addition on the physical characteristics of biogasoline, including the Research Octane Number (RON) value, density, viscosity, heating value, and flash point, was analysed. The results showed that the addition of methanol concentration gave the highest RON value of 83.3, while the 10% methanol concentration produced the highest calorific value of 53,865 j/g. The addition of methanol concentration also had a positive effect on increasing the flash point of the fuel. This study also shows the potential of biogasoline made from plastic waste as an efficient and environmentally friendly alternative fuel.
Analysis Of Water Harvester Machine Performance Using Single-Sided Thermoelectric Cooling Rezki, Dedi Nur; Rahman, Jhonni
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1525

Abstract

This study addresses the urgent issue of global water scarcity, particularly in arid regions with limited access to conventional water sources. The performance of a water harvester equipped with single-sided thermoelectric cooling technology is evaluated to enhance water collection efficiency from the atmosphere. The primary objective of this research is to optimize the machine's performance by varying fan speeds and analyzing its impact on collected water volume. The methodology involves experiments conducted at three different fan speeds: 1000 RPM, 1500 RPM, and 2000 RPM, with each speed tested for three hours and data collected every 30 minutes. The observed variables include collected water volume, air temperature, and humidity. Results indicate that water collection efficiency increases with higher fan speeds, with 2000 RPM yielding the highest volume. However, efficiency declines after 90 minutes, mainly influenced by fluctuating external factors such as temperature and humidity. Additionally, increased fan speeds may result in higher energy consumption, which is a consideration for developing more energy-efficient machines. The study recommends further development to integrate automatic control systems capable of adjusting fan speeds based on environmental changes in temperature and humidity. The conclusion of this research is that thermoelectric cooling technology has significant potential for water harvesting, yet sustainable innovations are necessary for adaptation across diverse environmental conditions.
Rekomendasi Waktu Rem Minimum untuk Uji Layak Jalan Sepeda Motor Berdasarkan Ketebalan Brake Pad dengan Metode Taguchi Siahaan, Ian Hardianto; Jonoadji, Ninuk; Welianto, Andre
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1567

Abstract

One of the main factors ensuring the safety of motor vehicle riders is their braking system. This system plays a crucial role in slowing down or stopping the vehicle. The efficiency of braking in disc brake systems is influenced by various aspects, one of which is the level of wear on the brake pads. When brake pads wear out, their thickness decreases, which can affect braking performance. The thinner the brake pads, the longer the stopping time required, which can increase the risk of accidents. This study aims to educate motorcycle users, as many still use brake pads even when their thickness has reached the minimum limit of 2-3 mm. The methodology used in this research is a stationary test that varies the thickness of worn brake pads, specifically at 2 mm, 4 mm, and 6 mm conditions. Subsequently, the three brake pads were tested at safe speed limits, ranging from 20, 40, to 60 km/h, with normal braking loads of 4 kg, 5 kg, and 6 kg. The conclusion indicates that the effective stopping time for motorcycle brake pads should be between 1.07 and 1.13 seconds, showing that braking performance is still adequate at a brake pad thickness of 2-3 mm to prevent the risk of accidents.
Pengaruh Pembentukan Alur Trapesium Pada Pelat Galvanil dengan Proses Bead Roller Terhadap Frekuensi Alami Pada Kondisi Batas Jepit – Jepit Harsono, Abimanyu; Adipura, Anandri Indra; Erwanto, Erwanto
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1589

Abstract

Galvanized steel sheet is a low carbon steel that is often used in the manufacturing industry, especially in the automotive industry, this is because galvanized sheet has properties that are ductile, easy to form and resistant to corrosion, making it suitable for application as a vehicle body, but low carbon steel sheet has limitations on the level of stiffness of the sheet so that it will affect comfort due to vibration when applied to vehicle construction. The stiffness of the sheet can be increased by forming a groove profile through the rolling process and increasing the thickness of the sheet so that its stiffness and natural frequency value will increase. The purpose of this study is to determine the effect of trapezoidal groove formation on the natural frequency of galvanized sheet by the rolling process using a bead rolling die with variations in groove width, groove depth and sheet thickness. The research method used is the experimental method, starting with the determination of the plate dimensions, the determination of the groove width and depth, the process of making groove profiles, the measurement and analysis of the results of the natural frequency values and plate stiffness. The dimensions of the test plates were 575 mm x 600 mm with thicknesses of 0.6 mm and 0.8 mm. The results showed that the increase in natural frequency and stiffness was affected by residual stress and plate thickness. The highest frequency obtained was 330.60 Hz on a plate with a groove width of 12 mm and a groove depth of 5 mm with a thickness of 0.8 mm, this result has increased compared to a smooth plate which is only 30.76 Hz.
Rancang Bangun Mesin Pengupas Kulit Kacang Tanah Menggunakan Motor Listrik Dengan Tipe Silinder Horizontal Menggunakan Bahan Pisau ST 37 Anderson, Sir; Yuliarman, Yuliarman; Maimuzar, Maimuzar; Nasirwan, Nasirwan; Nusyirwan, Nusyirwan; Nofriadi, Nofriadi; Elisma, Netri; Insani, Farhan Filza
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1603

Abstract

Peanuts are a plant that is widely cultivated in Indonesia, but the process of peeling the skin is still often done manually, which requires a lot of time and effort. To increase efficiency in this process, a peanut peeling machine with a horizontal cylinder design was developed. This innovation is designed to make it easier for farmers and small entrepreneurs to peel peanuts with a larger production capacity. This peeling machine is equipped with a nut discharge regulation system and uses a 1 Hp electric motor with a speed of 1400 rpm which is transmitted to 700 rpm. The stripping process is carried out by putting the dried peanuts into the hopper, then the knife cylinder rotates to separate the husks from the peanuts. The system is supported by a belt and pulley mechanism that ensures smooth operation of the machine. The test results showed that this machine was able to peel peanuts with a capacity of 64 kg/hour, providing a significant increase in productivity when compared to manual methods. This machine is expected to provide a more efficient solution for the agricultural industry and home businesses in peanut processing.
Perkembangan Kualitas Lubang Komposit Serat Daun Nanas dengan Menggurdi Bertahap Kecepatan Tinggi Mahdi, Whiko Androser; Mulyadi, Ismet Hari
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1604

Abstract

Composites are materials consisting of reinforcement and matrix. Reinforcing materials of composites consist of synthetic materials and natural fiber materials. One of the natural fibers that is currently being developed is pineapple leaf fiber, where several studies have found several ways to process pineapple leaf fiber so that it can be used as a substitute for synthetic fibers. One of the studies is looking for good machining parameters to process pineapple leaf fiber with a peck drilling canned cycle process which in this research objectives to see how the development of hole quality in the peck drilling canned cycle process. The stage in this research starts from the material being drilled with the stepwise dredging method, after the dredging process the holes are viewed using a digital microscope and then measured using Digimizer image processing software. The results of this study are roundness deviation, cylindricity deviation, axis perpendicularity deviation, and delamination ratio. The results obtained from this study will be subjected to statistical tests in order to obtain tested values using the ANOVA statistical test with the approach used, namely the fisher individual test in order to see the real impact of the machining process carried out.
Kajian Eksperimental Pengering Kopi Hybrid dengan Sistem Kontrol Temperatur Berbasis Mikrokontroler Sanubary, Iklas; Santoso, Pande Putu Agus; Suhendra, Suhendra
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1605

Abstract

This study aims to determine the performance of a hybrid coffee dryer with a microcontroller-based temperature control system. The heating sources used are sunlight and electric heater. The type of coffee used is liberica. The research method used is experimental, with the independent variable being time and the dependent variables being temperature and mass. Data collection was carried out for 4 consecutive days, starting at 09.00 WIB to 15.00 WIB with a data collection interval of every 20 minutes. The data measured were the temperature inside and outside the drying room and the mass of coffee before and after the drying process. Data analysis was done based on graphs, determining the drying rate and testing the coffee moisture content. The results showed that the average temperature difference measured inside and outside the drying room for 4 consecutive days was 17.21 oC. The total reduction in coffee mass in the dryer for 4 consecutive days was 572 grams with an average drying rate of 23.83 grams/hour. The results of coffee moisture content testing showed that the hybrid coffee dryer reduced coffee moisture content from 56.01% to 8.79%.
Analisis Sifat Mekanik dan Karakteristik Fisik Campuran Hidroksiapatit dari Tulang Sapi, Silika dengan Pengikat Resin sebagai Kandidat Implan Tulang Yanda, Hengki Ebitra; Gunawarman, Gunawarman; Affi, Jon; Yetri, Yuli
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1608

Abstract

Ceramic biomaterials based on hydroxyapatite (HA) and silica have been extensively studied due to their load-bearing capabilities in bone replacement and reconstruction applications. This study presents an analysis of the mechanical properties and physical characteristics of a mixture of bovine bone hydroxyapatite and silica with a resin binder as a candidate for bone implants. the objective of this research is to examine the effect of the quantity of hydroxyapatite grains and the composition of silica reinforcement particles on the mechanical and physical properties of the product. The methodology involves mixing bovine bone hydroxyapatite and silica in ratios of 90:10, 80:20, and 70:30. Subsequently, the specimens were molded and subjected to tensile tests to determine their tensile strength and elongation. Surface morphology analysis was conducted using a scanning electron microscope (SEM), while functional group and crystallographic analyses were performed using FTIR and XRD. the results indicate that the 70:30 composition provided the best outcomes, with a tensile strength of 13.07 MPa, compared to the 90:10 and 80:20 compositions, which had tensile strengths of 6.68 MPa and 12.96 MPa, respectively. The microstructure of the surface after tensile testing shows that the addition of silica can increase mechanical strength and reduce the porosity of the specimen surface.
Pengamatan Cacat Material Aluminium 6061 Proses Pemotongan Laser Menggunakan ESP32CAM Nanda, Rizki Aulia; Karyadi, Karyadi; Tukino, Tukino; Suhara, Ade; Rizki, Muhammad Nuzan; Ramadhan, Muhammad Faiz; Akmal, Khafid Khaulsar
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1609

Abstract

Using high-pressure and high-temperature laser light emission techniques, laser cutting works to cut materials in such a way that components at the laser cutting point produce cutting results. However, the current problem is that laser cutting often produces material defects including protruding parts, burnt surfaces, and pores on the laser-cut parts. Given this problem, the purpose of this study is to develop a camera capable of identifying material defects caused by laser cutting . The research method is the preparation of 6061 aluminum material, the preparation of the ESP32CAM camera, and the preparation of laser cutting parameter settings. In order to run the ESP32CAM program, C and OpenCV programming languages ​​are needed to identify items with material defects, color images, histograms, and FPS are needed. The results of the study showed that detecting defects at the highest FPS reading of 15.57 and a histogram value of 250 at the x coordinate and 950000 at the y coordinate. Eight defects in the material were found using Open CV detection on the ESP32CAM camera sample 3. From this technique it can be concluded that ESP32CAM is capable of identifying material defects caused by laser cutting.
Analisa Variasi Jumlah Mata Pisau Pada Mesin Pengiris Bawang Merah Saktisahdan, Tengku Jukdin; Bahari, Alvin
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1612

Abstract

The slicing process of shallots using simple tools remains a major obstacle to increasing production capacity and efficiency in the processing industry. To address these limitations, an analysis of the blade count variation in shallot slicing machines is required to produce more efficient and uniform slices. This study aims to optimize the shallot slicing process, enhance production efficiency, and evaluate machine performance with blade count variations of 2, 3, and 4 blades.The methods employed include documentation, direct experimental observation, and systematic data collection through treatment of experimental variables. The results show that the use of 2, 3, and 4 blades yields slicing capacities of 62 kg/hour, 70 kg/hour, and 78 kg/hour, respectively, with an average slice thickness ranging from 0.8 to 1.1 mm.These findings indicate that the number of blades significantly affects slicing productivity and efficiency, with the 4-blade configuration demonstrating the best performance. This study provides valuable insights for developing more effective and efficient shallot slicing machines, contributing to increased productivity in the shallot processing industry.

Page 18 of 21 | Total Record : 204

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