cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota padang,
Sumatera barat
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
 17   18   19   20   21 
Investigasi Performa Variasi Sudut Impeller Blade Terhadap Gaya Dorong Waterjet Thruster Pristiansyah, Pristiansyah; Oktavianto, Mario; Subhan, Muhammad; Suzen, Zaldy Sirwansyah; Hasdiansah, Hasdiansah
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1767

Abstract

Variations in ship propulsion are needed to assist in the water transportation purposes that will be used. Waterjet becomes one of the efforts for variations of the ship propulsion system on the waterjet occurs because the action of the thrust force that occurs causes the ship to move at a certain speed and the reaction of the fluid. The use of 3D Printing is starting to be developed and researched whether it is feasible to use in water transportation. 3D Printing technology or known as Additive layer manufacturing and the famous technology is Fused Deposition Modeling this technique is used to print products using filaments as material, the printed product has ideal geometry if it has a precise size and perfect shape. The testing process carried out at the Bangka Belitung state manufacturing polytechnic obtained the highest thrust results 30˚ angle with the number of blades 5 has the highest value with a thrust of 206 N and the lowest 45˚ 5 blade with 135 N thrust, the difference in angle affects the thrust generated.
Perancangan Alat Pengolah Limbah Plastik Jenis PET (Polyethylene Terephthalate) Kapasitas 3 kilogram dengan Menggunakan Kompor Oli Bekas Lesmana, I Gede Eka; Sihombing, Boyma Fugrystiano; Hartanrie, Rovida Camalia; Tatak K, Arif Riyadi; Aldito, Dias
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1771

Abstract

Plastic is one of the materials widely used in society, one of which is PET (Polyethylene Terephthalate) plastic. Plastic is basically formed from petroleum, so it can be returned to its original form by the pyrolysis process. The pyrolysis process converts organic material at high temperatures and breaking down into smaller molecular bonds. Research and design of pyrolysis have been extensively studied before, with variations in the types of plastic waste burned or the type of fuel used to achieve the optimal heating rate. The fuel used in previous studies included fuels such as charcoal, LPG gas, and bicket from certain waste. In this study, the combustion process uses a jet stove with used oil fuel so that automotive waste can be used as fuel. The design method used in the manufacture of this plastic waste processing tool is the Pahl & Beitz design method, which begins with identifying problems, developing and planning concepts until the required concept is selected. In this design, the results of the 3 kg capacity pyrolysis design were obtained with the main components, namely a reactor tube with specifications of ∅250 mm and a height of 320 mm, a smoke conductor pipe using a galvanized pipe type with ∅25.4 mm, a copper spiral condenser pipe with ∅1/4 in, a condenser tube with specifications of ∅230 mm and a height of 250 mm, a tool frame using 30 mm × 30 mm × 3 mm angle iron made of carbon steel. In testing using Computational Fluid Dynamics simulation in the Solidwork application, a smoke temperature of 400 ℃ was obtained.
Identifikasi Root Cause Produk NG Master Cylinder di PT X Suryawan, Lazuardi Allan; Sena, Boni; Rahmanto, Achmad Azis
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1773

Abstract

The braking system is a crucial component in vehicles, responsible for reducing speed or halting the vehicle safely. However, several technical issues, such as brake fluid leakage, can compromise braking performance. Leaks can occur in hydraulic lines, the master cylinder, or brake calipers, leading to reduced hydraulic pressure and ineffective braking. Other issues like wear on components, excessive heat causing fading, and corrosion or contamination of brake fluid further degrade braking performance. The master cylinder plays a vital role in converting mechanical pressure into hydraulic pressure to operate the brake caliper. Damages such as fluid leaks, wear, corrosion, or contamination can impair this function, increasing the risk of accidents. Factors contributing to failures include poor material quality, machine setting errors, and inadequate maintenance. Regular inspection and maintenance of these components are essential to ensure vehicle safety and optimal braking performance.
Analisis Perawatan Mesin Bubut CD6250C Dengan Metode Reliability Centered Maintenance (RCM) di PT. XYZ Baharudin, Habib; Rizaldi, Dedi; El Atros, Mochammad Rajib
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1774

Abstract

PT XYZ is one of the industries engaged in the manufacturer of agricultural, plantation, industrial equipment / machinery that can make / engineer tools / machines. Conventional lathe is one of the production machines in PT XYZ. Lathe machines are often damaged so they require maintenance. This study aims to provide maintenance proposals for conventional lathe machines through the application of the RCM approach in order to get a more effective and efficient maintenance strategy, the application of RCM starts from identifying system functions and malfunctions, Intermediate Decision Tree (IDT) analysis and Logic Tree Analysis (LTA), Failure Mode and Effect Analisys (FMEA) analysis, Mean Time Between Failure (MTBF) and Mean Time To Repair (MTTR) analysis and selection of maintenance proposals. From the results of the RCM analysis of conventional lathe machines, it is obtained that the components that have the largest Risk Priority Number (RPN) are Lathe Chisels 54 RPN, Chuck / Chamfer 30 RPN, V-Belt & Pulley 20 RPN. The results of the proposed maintenance for lathe machines are Preventive Maintenance, component maintenance is carried out before experiencing damage such as chuck before 1112.5 hours of use, Lathe Chisel before 185.08 hours of use, V-Belt + Pulley must be repaired before 2226 hours according to MTBF calculations.
Pembuatan Referensi Praktik Dasar Perancangan Progressive Die pada Perangkat Lunak Siemens NX Suseno, Ignatius; Sutopo, Antonius Adi; Rizaldi S, Fajar
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1798

Abstract

As a continuous improvement through state-of-the-art discovery and uniqueness for the learning material of the Progressive Die Design practical lecture, it is necessary to update it by reviewing 2 aspects, namely "knowledge of how to design progressive die" and "its application to Siemens NX software". Knowledge is obtained by comparing design methods from several selected sources and producing logical progressive die design operation guidelines in sequence. The application on Siemens NX uses the Siemens NX feature optimization method to produce the best design in a relatively short time, with the guidance of design knowledge that previously obtained. An example of a fairly complex sheet metal product is selected as an object for progressive die design. This design requires the selection and combination of Siemens NX features to produce the stages of operation planning, strip development and die designing. The difference sheet metal geometric complexity will result a different number of stages due to the uniqueness of the alternative features selection and combinations. The knowledge and application of design process are documented into a tutorial reference book and tested on students with a feasibility result above 90%. Eligibility data was obtained by filling out a questionnaire after studying the reference book.
Analisis Coefficient of Performance (COP) dengan Pemanfaatan Energi Panas Discharge Kompresor Sistem Heat Exchanger Double Tube pada AC 1 PK untuk Pemanas Air Atifah, Nailul; Riyana, Angga; Astuti, Fifit
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1810

Abstract

Hot water has become an important part of everyday life. Utilization of waste heat is increasingly relevant in the modern era, due to very significant technological advances. One of them is the refrigeration system which regulates temperature by transferring heat energy from inside to outside the room. Basically, this heat can be used to heat water by absorbing heat before it reaches the condenser. Reusing waste heat from the condenser can save the electricity needed to heat water, making it an efficient way to utilize wasted energy. This research aims to determine the effect of variations in HE (heat exchanger) pipe length on the performance of the Coefficient of Performance COP, and the required electrical power consumption using heat exchanger calculation analysis for the CoolPack application. This research uses an experimental method on a 1 PK split AC with variations without a heat exchanger and with a 3 pass, 5 pass double tube heat exchanger. The results of this research show that without a heat exchanger the average COP is 3.68 and the electric power is 0.063 kWh, with a 3 pass heat exchanger the average COP is 4.1 with an increase of 11.4% from the data without using a heat exchanger and an electric power of 0.054 kWh, with a 5 pass heat exchanger the average COP is 4.66 with an increase of 26.6% from the data without using a heat exchanger and an electric power of 0.052. kWh. This shows that the better the heat dissipation in the condenser, the greater the heat absorbed by the evaporator, making the COP higher and the compressor work lower. Therefore, the use of electrical power is lower and the performance of an Air Conditioning system is more efficient.
Studi Perbandingan Emisi dan Kinerja Motor Bensin dengan Bahan Bakar Campuran Etanol Pratama, Mahardhika Putra; Novianto, Arief
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1820

Abstract

The rapid development of transportation can have an impact on the surrounding environment such as congestion, air pollution, noise pollution, accidents, delays, and increased fuel consumption. Alternative fuels are very necessary and needed to minimize the dangers of the impact of increased motorized vehicles, especially air pollution and increased fuel consumption. Ethanol is one of the alternative fuel sources to replace or as a fuel mixture that is classified as biofuel. The purpose of this study is to determine the impact of ethanol-blend use on exhaust emissions and engine performance in gasoline motorcycles. The ethanol-blend variations used as fuel start from pure pertalite (PE0), pertalite + 5% ethanol (PE5), pertalite + 10% ethanol (PE10), pertalite + 15% ethanol (PE15), and pertalite + 20% ethanol (PE20). The results of this study show that the use of ethanol-blend has an impact on engine performance and exhaust emissions of gasoline motorcycles. PE5 fuel is the best fuel variation with CO exhaust emissions of 0.13% and HC of 26.7 ppm at 4000 rpm engine speed. Meanwhile, the highest torque engine performance was achieved with PE5 fuel with a torque of 114.9 Nm, and the engine power reached 71.6 HP with PE20 fuel. Compared to the use of pure pertalite fuel of 113.6 Nm at 2500 rpm engine speed and 69.0 HP at 5000 rpm engine speed, respectively.
Analisis Gaya Drag Pada Mobil Sedan dengan Penambahan Komponen Drag Reduction Aziz, Abdul; Nofriadi, Nofriadi; Rudianto, Rudianto; Alfi, Rizki; Naro, Aulia; Sumiati, Ruzita
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1838

Abstract

The aerodynamic design of a vehicle body plays a critical role in reducing air resistance (drag), thereby contributing to improved fuel efficiency. Aerodynamic resistance in vehicles is influenced by several parameters, including body geometry, auxiliary elements, and the orientation of the vehicle relative to the airflow. This study aims to analyze the effects of body shape variations and the addition of a spoiler on drag force reduction in a sedan-type vehicle. The methodology employed in this research is numerical simulation using Ansys Fluent software. Simulation results indicate that the model with a more streamlined geometry (Model C) produces a lower drag force compared to the model equipped with a spoiler. The drag coefficients obtained for each configuration are as follows: Sedan A — 0.780, Sedan B with a spoiler — 0.775, and Sedan C with an improved body geometry — 0.647. These findings suggest that optimizing body shape is more effective in enhancing the aerodynamic performance of a vehicle than the addition of external aerodynamic elements such as a spoiler.
Rancang Bangun Cetakan Alat Press Pelepah Pinang Menjadi Wadah Makanan Ramah Lingkungan untuk UMKM Araliz, Maheka Restu; Adril, Elvis; Budiman, Daddy; Mutia, Mutia
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1846

Abstract

The issue of plastic waste has become a global concern that urgently needs to be addressed. On the other hand, agricultural waste also poses its own challenges. Indonesia is an agrarian country where the agricultural sector plays a significant and vital role in the national economy. One of the major agricultural products in Indonesia, particularly in West Sumatra, is areca nut (betel nut). The areca palm sheath is largely underutilized by farmers, often left unused or burned, which in turn leads to another issue—air pollution. The transformation of organic solid waste into eco-friendly products is still rarely implemented. This study aims to design, assemble, and test a simple press mold to process areca palm sheaths into environmentally friendly food containers. The results show that the mold was successfully designed with dimensions of 140 mm x 140 mm x 20 mm, using ST 42 material. Mold testing with temperature variations (100°C, 150°C, and 175°C) and durations (1 minute, 2 minutes, and 5 minutes) indicated that a temperature of 150°C produced the best results in terms of color and shape accuracy. This innovation is expected to support small and medium enterprises (SMEs) in reducing plastic waste and utilizing areca palm sheath waste.
Analisis Efektivitas Thermal Insulation pada Sekat Ruang (Bulkhead) Bus untuk Mengurangi Panas Mesin Hidayat, Muhamad Fikri; Muchlisinalahuddin, Muchlisinalahuddin; Aprilman, Devia; Adriansyah, Adriansyah; Fajri Arsyah, Ahmad Hasnul; Kamil, Muhammad Aslam
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1853

Abstract

This study aims to evaluate the effectiveness of two types of thermal insulation materials, namely polyurethane (PU) foam and basaltwool, in reducing heat transfer from the engine compartment to the passenger cabin through the bus bulkhead structure. Optimal thermal insulation is essential to maintain cabin thermal comfort and enhance safety within the vehicle interior. The testing methods included measurements of thermal conductivity and evaluations of each material’s resistance to extreme temperatures. The results indicate that PU foam exhibits lower thermal conductivity (±0.020–0.028 W/m·K) and achieves heat retention efficiency of 95–98% at temperatures around 100°C. On the other hand, basaltwool shows slightly higher thermal conductivity (±0.035–0.040 W/m·K) with efficiency ranging from 90–95%, but significantly outperforms in terms of heat resistance, withstanding temperatures as high as 600–1000°C. Based on these findings, PU foam is considered more suitable for applications that require thermal efficiency at moderate temperatures, while basaltwool is better suited for environments exposed to continuous high temperatures. Therefore, the appropriate selection of insulation material should be based on specific operational conditions to optimize both thermal comfort and cabin safety.

Page 20 of 21 | Total Record : 204

 17   18   19   20   21 

Filter by Year

2004 2025


Reset
Filter By Issues
All Issue Vol 18 No 1 (2025): Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin Vol 16 No 1 (2023): Jurnal Teknik Mesin Vol 15 No 2 (2022): Jurnal Teknik Mesin Vol 15 No 1 (2022): Jurnal Teknik Mesin Vol 14 No 2 (2021): Jurnal Teknik Mesin Vol 14 No 1 (2021): Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin Vol 12 No 2 (2019): Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin Vol 11 No 1 (2018): Jurnal Teknik Mesin Vol 10 No 2 (2017): Jurnal Teknik Mesin Vol 9 No 1 (2012): Jurnal Teknik Mesin Vol 1 No 2 (2004): Jurnal Teknik Mesin Vol 1 No 1 (2004): Jurnal Teknik Mesin More Issue