cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
A. Jannifar
Contact Email
polimesin@pnl.ac.id
Phone
+628126930456
Journal Mail Official
polimesin@pnl.ac.id
Editorial Address
Politeknik Negeri Lhokseumawe Jl. Banda Aceh-Medan Km 280 Buketrata, Lhokseumawe, 24301, Aceh, Indonesia
Location
Kota lhokseumawe,
Aceh
INDONESIA
Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 28 Documents
 1   2   3 
Search results for , issue "Vol 22, No 1 (2024): February" : 28 Documents clear
Computational Analysis Of Pipe Bend Angle Effect On Pressure Drop Akbar, Muhammad Khoirul; Roihatin, Anis; Aulia, Nur Fatowil
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4229

Abstract

The air conditioning system is a significant energy source inskyscrapersfor supplying cool air to all rooms. However, the process has energy losses due to the ducting used. If the problem of energy loss can be solved, the air conditioning system will bring advantages in terms of energy efficiency and financial savings. A pressure drop in air duct pipe installations, such as pipe bends, is one type of energy loss. This research intends to use Computational Fluid Dynamics (CFD) to investigate the effect of pipe bend angles and velocity relationships on pressure drop in air duct pipe installations, which has previously been validated by experimental research with a 0.17% error percentage. This study focuses on square pipe bends with varying 45o, 60o, and 90o bend angles. The research showed that when testing the highest fluid velocity of 19.68 m/s, the highest pressure drop was 275.69 Pa on the pipe bend angle of 90o, while the lowest pressure drop was 256.41 Pa on the pipe bend angle of 45o. When testing the lowest fluid velocity of 9.77 m/s the highest pressure drop was 67.73 Pa on the pipe bending angle of 90owhile the lowest pressure drop was 62.98 Pa on thepipe bending angle of 45o. The simulation results indicate that the larger pipe bend angle result in a higherpressure drop, and vice versa.
Exhaust Emission Control in Sport Motorcycles: A Comparison of Catalytic Converters with Alternative Metal Materials Warju, Warju; Ariyanto, Sudirman Rizki; Pratama, Muhammad Yandi
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4092

Abstract

In this modern era, motor vehicles have brought significant changes in human life. Faster and more efficient mobility has increased connectivity between regions, supported economic growth, and improved quality of life. However, increased mobility also means an increase in vehicle exhaust emissions, which contribute to climate change and air pollution. One effective technology for controlling exhaust emissions is the use of catalytic converters. Metal catalytic converters, such as copper, brass, and chrome-plated copper, have been researched as more affordable and effective catalyst alternatives. This research aims to analyze the optimal design of exhaust systems with catalytic converters among three types of alternative materials (copper, brass, and chrome-plated copper) as well as standard exhaust systems without catalysts (STD NC) and standard platinum group metal exhaust systems (STD PGM) in maximizing the reduction of motor vehicle exhaust emissions. An experimental research design was used by utilizing a 2015 Yamaha Vixion Lightning as the research object. Catalytic converters were prepared with specific specifications to ensure consistency and accuracy in measurements. CO (carbon monoxide), HC (hydrocarbons), CO2 (carbon dioxide), and O2 (oxygen) emissions were analyzed using an Exhaust Gas Analyzer. The research results indicate that the CuCr sample exhibits excellent performance in reducing CO and HC emissions. The CuCr sample has an average CO emission of 4.09% Vol with a standard deviation of 1.46, demonstrating good consistency in CO emissions. Meanwhile, the average HC emissions from the CuCr sample are 320 ppmVol with a standard deviation of 106, indicating good consistency in HC emissions. All samples meet the emission standards set by the government, except for the STD NC sample, which exceeds the CO emission threshold.
The Impact Of Introducing Brown Gas Into The Incoming Air Flow On The Performance Of An Internal Combustion Engine Wahyu, Mujahid; Susilo, Sugeng Hadi; Kamal, Dianta Mustofa
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4575

Abstract

The increase in the number of motorized vehicles has led to challenges in maintaining environmental air quality, combustion efficiency, and the sustainability of fossil fuels. An innovative solution to address these issues is the utilization of brown gas. This study aims to investigate the impact of introducing brown gas into the incoming air flow on the performance of an internal combustion engine. The brown gas flow rate varies based on the gas production rate resulting from variations in the addition of NaOH (10 g/l, 20 g/l, and 30 g/l) to every 1 liter of water in the generator. Gas production rates are measured using a flow meter. The influence of brown gas on gasoline engine performance is assessed through power testing with a chassis dyno test engine and exhaust emissions testing with a gas analyzer. The findings reveal that the highest flow rate of brown gas is achieved with the addition of 30 g/l NaOH during the electrolysis process. Introducing brown gas into the incoming air flow can increase maximum engine power by 15.5% and reduce CO exhaust emissions by 23.37%.
Optimization Of Gas Turbine Performance 2.1 Using the Overhaul Combustion Inspection Method Handoko, Susilo; Hendra, Hendra; Suharyadi, Hafid; Widiyanto, Totok
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4221

Abstract

Gas turbines are one type of internal combustion drive, the initial mover utilizes gas combustion as a fluid to rotate the turbine with internal combustion. Gas turbines at private companies producing electricity use the initial movers, namely gas turbines and steam turbines. Therefore, it is also called the "Steam Gas Power Plant/PLTGU.”Private company especially in Block 2, uses two gas turbine units with Mitsubishi GT 2.1 specifications which are used as the initial drive of the generator. Types of overhauls in gas turbines are divided into three, including turbine inspection, combustor inspection, and major inspection. In maintaining the reliability of the GT 2.1 Gas Turbine, an overhaul combustion inspection was carried out in the combustion chamber because there was an increase in heat rate of 17,9% which caused a decrease in thermal efficiency and net turbine power of the GT 2.1 Gas Turbine by 17% and 2,1%. So that steps are taken to optimize the GT 2.1 Gas Turbine with the combustion inspection method by repairing and cleaning the combustion bucket nozzle. Increased thermal efficiency by 27,8% or 27,13% to 36,01% from data before overhaul. This was also followed by an increase in compressor power and turbine power so that the net turbine power increased by 38% or 141339,35 hp to 195246,54 hp. 
Analysis of Temperature Distribution on the Coffee Roaster Drum for a Capacity of 2 kg Using Computational Fluid Dynamics (CFD) Suryadi, Dedi; Leonanda, Benny Dwika; Mustagfirin, Alfin; Suandi, Agus
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4032

Abstract

Coffee, one of Indonesia's largest commodities, is often processed using traditional methods and tools that rely heavily on manual labor and can be labor-intensive. To make the coffee roasting process more efficient and reduce the need for human effort, a coffee roasting machine can be used. This study aimed to analyze coffee roasting drums using computational fluid dynamics (CFD) to determine the optimal drum thickness and rotation speed in a coffee roasting machine. The study considered three different thicknesses (1mm, 2mm, and 3mm) and three different rotation speeds (60rpm, 65rpm, and 70rpm). The coffee roasting drum was modeled using CFD. The study's results showed that a drum thickness of 2mm and a rotation speed of 70rpm achieved the best heat distribution during roasting, reaching the desired temperature in 900 seconds. This information could be used to design a more efficient coffee roasting machine or improve the performance of existing machines.
Efficiency Of Hydrogen Production From Sea Water Using The Electrolysis Process With Solar Energy Photovoltaic Systems Fadhli, Fadhli; Hakim, Lukman; Setiawan, Adi; Dewi, Rozanna; Zulnazri, Zulnazri; Daud, Muhammad; Sari, Ratna
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4824

Abstract

Hydrogen is a future alternative energy source, offering environmental friendliness and renewable properties that can potentially replace fossil fuels. Despite the potential, its synthesis typically requires high energy and costs, posing a constraint on mass production due to low efficiency. Therefore, this study aims to develop hydrogen production technology from seawater using the electrolysis process with solar energy from photovoltaic systems as energy source. The experiments were carried out with different voltages of 10, 15, 20, and 25 volts, using electrode materials made of titanium in mesh and plate shapes. Seawater served as the electrolyte, and it was supplemented with 0.1 molNaOH and 0.1 mol H2SO4. The results showed that the applied voltage had a positive correlation with hydrogen production rate, while the electrolysis process time had no significant effect. In addition, the use of NaOH catalyst with mesh-shaped titanium electrode could yield efficiency of hydrogen production flow rate of 2.06% or 52 ml/minute. This outcome was better compared to the electrolysis of seawater electrolyte with and without H2SO4 catalyst, which yielded values of 1.84% or 30.1 ml/minute and 1.42% or 28.9 ml/minute, respectively.
Calculation Of Minimum Shaft Bearing Diameter Of ORC Turbine-Generator 100 kW And Analysis Using Finite Element Method Hermawan, Hana; Guardi, Arli; Purnama, Harry; Sakban, Sakban
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4262

Abstract

This study aims to analyze the strength of a turbine-generator shaft and determine the minimum diameter of the shaft using the Finite Element Method (FEM). The research problem is to ensure the shaft's strength and durability, considering the high rotation speed of the hermetic turbine generator. The methodology involves using Finite Element Method and comparing the calculated minimum diameter with the physical properties of stainless steel 420. The research design includes modeling the shaft using SolidWorks and conducting FEM analysis using Ansys Mechanical Structure. The results show that the maximum von Mises stress is 50.6 MPa, which is below the material's yield strength of 345 MPa. The deformation of the shaft is minimal, and the natural frequencies indicate no critical speed below the rated RPM of the turbine-generator. The implications of this study are that the analyzed shaft design is safe and meets the strength requirements for the turbine-generator.
Characterization of FDM 3D Printed Parts Using TPU + PETG Filaments For Shin Guard Products Darsin, Mahros; Yulio, Agit Yoga; Syuhri, Ahmad; Ramadhan, Mochamad Edoward; W.C.S, I Made Ivan; Sumarji, Sumarji
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4122

Abstract

3D printing machines are used to print products that support sports activities, such as shin guards. During sports, shin guards are protective equipment to prevent injury to the lower legs. Filaments that are suitable for making shin guards are thermoplastic polyurethane (TPU) and polyethylene terephthalate (PETG) because they have impact resistance properties needed to protect the feet during sports. The variation is the level parameter layer height, nozzle temperature, printing speed, and bed temperature. Next, an impact test will be carried out to determine the optimal parameter variation on the 3D printing machine, which is expected to be a reference for printing quality products. This study uses a 3D printer, Ender v3, to print specimens and shin guard products. The material used is TPU+PETG filament. The Taguchi method with the orthogonal matrix L9(3)4 was repeated thrice for each experiment. After that, an analysis of variance was carried out. Parameter variations used in the study were layer height (0.1 mm, 0.2 mm, 0.3 mm), nozzle temperature (220℃, 225℃, 230℃), printing speed (45mm/s, 45mm/s, 50mm/s) and bed temperature. (70℃, 75℃, 80℃). In this study, Charpy impact testing will be carried out. The combination of factors that can produce an optimal impact test is layer height level 2 (0.2 mm), nozzle temperature level 1 (220℃), printing speed level 3 (50 mm/s) and bed temperature level 2 (75℃) with an impact strength value the highest was 27.20 and the lowest was 11.07. The combination of factors that have the most significant effect on the impact test strength values is layer height 63.97%, nozzle temperature 6.19%, printing speed 2.07% and bed temperature 4.74%.
Investigation Of Turning Results Using Used Chisel Bit File And Ahisel Bits From ST-37 Steel Pack Carburizing Wijayanto, Hendi Lilih; Malau, Alexander; Amiruddin, Amiruddin; Putra, Aditya Perdana; Alfian, Muh
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.3935

Abstract

Much research in the manufacturing industry has been conducted on variations in cutting force, temperature, and chip directly related to tool wear and cutting performance. Therefore, this research analyzed the cutting performance of cutting tools from the pack carburizing-used files against the results of turning facings. Then, the chisels were welded to ISO 6 tool holders after welding. The chisels were used to turn low carbon steel ST-37 with a diameter of 50.4 mm using a timeway CL-460 lathe with 0.2mm feeding and 400, 605, 910, and 1330 RPM variations. The test results indicated that the bit of carbide from the pack carburizing had a roughness value of 0.890 µm, belonging to class N6. Hence, the roughness value was lower (smoother) than turning facing using a file used from pack carburizing with a roughness value of 3.014 µm.
The Simulation Of Drop-Weight Impact Test On Ramie-Eglass Hybrid Fiber Composite For Jaloe Kayoh Wall Material Tamlicha, akram; Rizal, Samsul; Hasanuddin, Iskandar; Noor, Muhamad Mat; Ikramullah, Ikramullah; Nazaruddin, Nazaruddin
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4645

Abstract

The purpose of this study is to simulate drop-weight impact tests on hybrid fibre composites made of ramie and Eglass, which are used to make the traditional Acehnese boat wall material for jaloe kayoh. Using composites of ramie-Eglass fiber hybrid in the construction of jaloe kayoh wall material will significantly enhance the strength, durability, and sustainability of traditional Acehnese boats. The simulation was carried out using the finite element method approach using the Abaqus software. Three distinct laminate layer configurations—three layers (GRG), five layers (GRGRG), and six layers (GRGGRG)—with alternating Eglass and ramie fibres make up the test specimens. The ends of the specimen are set with fixed support to ensure boundary conditions, which limit all active structural degrees of freedom on all sides of the specimen. According to simulation results, the specimen with six laminate layers, measuring 12.498 mm, had the largest displacement. The specimen with six laminate layers has the highest stress concentration, measured at 560.6 MPa, while the specimen with three layers has the highest strain concentration, measured at 0.023. Its indicating that the lamina variation can influence the structural performance of the jaloe kayoh material. This research contributes to understanding the potential of ramie-Eglass hybrid fiber composites to enhance the safety and durability of traditional vessels such as jaloe kayoh. The implications of the results can serve as a foundation for the development of superior structural materials in the future.

Page 1 of 3 | Total Record : 28

 1   2   3 

Filter by Year

2024 2024


Reset
Filter By Issues
All Issue Vol 23, No 6 (2025): December Vol 23, No 5 (2025): October Vol 23, No 4 (2025): August Vol 23, No 3 (2025): June Vol 23, No 2 (2025): April Vol 23, No 1 (2025): February Vol 22, No 6 (2024): December Vol 22, No 5 (2024): October Vol 22, No 4 (2024): August Vol 22, No 3 (2024): June Vol 22, No 2 (2024): April Vol 22, No 1 (2024): February Vol 21, No 6 (2023): December Vol 21, No 5 (2023): October Vol 21, No 4 (2023): August Vol 21, No 3 (2023): June Vol 21, No 2 (2023): April Vol 21, No 1 (2023): February Vol 20, No 2 (2022): August Vol 20, No 1 (2022): February Vol 19, No 2 (2021): Agustus Vol 19, No 1 (2021): February Vol 18, No 2 (2020): Agustus Vol 18, No 1 (2020): Februari Vol 17, No 2 (2019): Agustus Vol 17, No 1 (2019): Februari Vol 16, No 2 (2018): Agustus Vol 16, No 1 (2018): Februari Vol 15, No 2 (2017): Agustus Vol 15, No 1 (2017): Februari Vol 14, No 2 (2016): Agustus Vol 14, No 1 (2016): Februari Vol 9, No 1 (2011): Februari Vol 8, No 2 (2010): Agustus Vol 8, No 1 (2010): Februari Vol 7, No 2 (2009): Agustus Vol 7, No 1 (2009): Februari Vol 6, No 2 (2008): Agustus Vol 3, No 2 (2005): Agustus Vol 2, No 1 (2004): Februari Vol 1, No 1 (2003): Agustus More Issue