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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 503 Documents
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Thermal analysis and thermography observation of stainless-steel ice cubes Luthfi Luthfi; Azhar Azhar; Zuhaimi Zuhaimi; Syamsuar Syamsuar; Sumardi Sumardi
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.3985

Abstract

Alternative products for water ice cubes have long been sought due to the spread of waterborne diseases and microplastic contamination, as they are often made from unhygienic water sources. Recently, stainless-steel ice cubes have been considered as one of the best alternatives, and they have been very popular in marketplaces, although very few studies found in the literature that have investigated their potential in replacing water ice cubes. In this study, the thermal performance of stainless-steel ice cubes will be explored experimentally using a combination of an Arduino microcontroller equipped with DS18B20 thermocouple sensors and a HIKMICRO B20 thermal camera with the aim to find out how good stainless steel ice cubes for cooling food and beverages.  The time evolution of water temperature in glasses filled with stainless-steel cubes of various brands is compared with that of water ice cubes. The temperature field obtained from thermal images is used to further observe the overall temperature of water in the glass. Leeseph stainless-steel ice cubes are found to have thermal performance comparable to water ice cubes, while SSGP ice cubes can retain lower temperatures for a longer time compared with other ice cubes. The effect of the number of ice cubes (N), the volume of water (V), and the average diameter of the glass used (D) are also investigated. At 1 ≤ N ≤ 4, the larger number of ice cubes used are found to lower the minimum temperature, and to decrease the minimum time,  while at 150 ml ≤ V ≤ 300 ml, the larger amount of water used are observed to increase the minimum temperature and to increase the minimum time, . At 53 mm ≤ D ≤ 66 mm, larger glass diameter used are found to increase both the minimum temperature, and the minimum time
Mobility, Kinematic, Singularity, and Workspace Analysis of a Translational Parallel Manipulator with 2(RRPaRR)-PRRR Kinematic Chains Adriyan Adriyan; Indra Hasan; Deru Assadullah Assadullah Hanif; Daniel Rumahorbo; Bima Amrianto; Rahmad Illahiy
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4075

Abstract

This article presents an asymmetric parallel manipulator with 2(RRPaRR)-PRRR kinematic chains. This manipulator aims to operate as a lower-mobility parallel manipulator with the pure translational motion of its platform. Therefore, a series of analyses are performed to fulfill this intention. First, the mobility analysis is performed by applying the Grübler-Kutzbach equation and the screw theory. Then, the kinematic, singularity, and workspace analysis are applied to analyze this PM. As  a result, the application of the screw theory for the configuration of its kinematic chains shows its mobility in a pure translational motion in space. Then, this manipulator has a closed-form solution for its direct kinematic problem expressed in a quadratic equation. By applying singularity and workspace analysis via visualization, the singularity-free workspace along the z-axis of its workspace can be identified. This can later be used as a useful workspace. Overall, the presented manipulator can be applied to a translational parallel manipulator
Development of Solar Panel Monitoring System On Automatic Meter Reading Tika Iswardhani; Astrie Kusuma Dewi; Chalidia Nurin Hamdani
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.v22i1.4220

Abstract

In dealing with era society 5.0, a gas company uses the Automatic Meter Reading (AMR) system, which is a remote data reading automation technology system for measuring instrument data in the field, which then conveys the information to the center via communication media data. In the Metering/Regulating Station (M/RS) installation, AMR is connected to the Electronic Volume Converter (EVC) which functions to transmit data from measuring instrument readings in the EVC to the data collection server. The modem on the AMR system uses a power supply from the solar panel system during the day and a battery system at night. The system for handling incomplete data disturbances is currently still in corrective action due to the unavailability of a solar panel monitoring system in the AMR system, causing difficulties for the team in conducting root cause analysis due to problems with battery voltage which are unable to cure AMR. To change the operation and maintenance activities of the AMR system, which was previously corrective action into preventive action, the authors will design and build a long-distance integrated solar panel monitoring system at AMR with the following features monitoring temperature, voltage, and current modules of solar panels, monitoring temperature and battery loading, and AMR remote restart function.
Archimedes Screw Turbine Application on Portable Mini Hydropower Plant RD Kusumanto; M. Noviansyah Nugraha; Indrayani Indrayani
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3126

Abstract

In this Turbine Design Analysis, we can obtain the necessary measurement results from one of the river locations where research is conducted. The original data for this objectivity was gathered by the authors through direct examination of the area or research site. This data was gained by three measurements: a direct survey of the location, quantitative measurements, and an analysis of the collected data. The authors obtain the necessary data such as differences in water level elevation (Head), Measurement of water discharge distribution (V), width of function on the river (L), and river area (A) and water discharge from the results of measurements to sites (Q). The tool's turbine efficiency has been calculated to be 55.6% based on the results of an analysis. Based on the acquired study, the developed turbine has two threads, a screw tilt angle of twenty-two degrees, and a length of eighty centimeters. In theoretical calculations, the hydropower's (PHydropower) generation power is 1114.42 Watt, the turbines (PTurbines) generation power is 664.2 Watt, and the generator's (PGenerator) generation power is 564.6 Watt. This value is used as a reference for selecting the type of generator to be utilized in the tool's design. Measurement of rotation of turbines the optimal turbine tilt angle for creating optimal turbine rotation is 30 degrees, resulting in a turbine speed of 402 revolutions per minute. The turbine tilt angle of 30 degrees (Optimal Angle) delivers the best results with an Electric Voltage (V) of 12.77 Volts and an Electric Current (I) of 2.51 Amps, according to the design tool's measurement data. Based on the results of an examination of electrical power output, a turbine tilt angle of 30° (Optimal Angle) delivers the best results with a residual power of 80 to 150 Watts when using a design tool suitable to steady and fast discharge conditions
Study on the application of green energy in a mini-AC cooling system utilizing peltiermodule and heat pipe technology Irwin Bizzy; Darmawi Darmawi; Agung Mataram; Fadhil Fuad Rachman
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4893

Abstract

The climate in tropical countries is very humid and hot, so it requires cooling and regulating air humidity. Heat release from the heat side using a heat sink, such as the conventional Peltier method, does not function optimally due to the limited area of thermal resistance obtained. To increase the thermal resistance in heat release, a heat pipe is used as a passive heat exchange device so that it can maximize heat transfer from the hot side of the Peltier to the surrounding air. This research aims to determine the rate of heat transfer, whether it can be conditioned by the relative humidity (RH) in the room, and whether installing a temperature and RH control system can work to cool the room. Experimental methods were used in this research. This research results show that TEC Cooler can transfer heat to a maximum. TEC can transfer heat at 22.7 J/s per second with 3 running fans. With a power consumption of 136.1 W. The total energy released is 114.7 J/s; this energy is still considered suitable for use in cooling a room.
CFD analysis in investigating the impact of turbine blade number on the performance of hydro turbine Fatahul Arifin; Ade Putra Maulana; Indrayani Indrayani
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3671

Abstract

The demand for electrical energy in Indonesia is growing, and therefore more effort is required to fulfill this need. Indonesia has considerable hydropower potential due to its geographical location and climate, by utilizing areas that have this potential to support the government's renewable energy program to provide electricity to the community. Impeller turbines are one option in an effort to create renewable energy generation. In this study, a comparison of the number of turbine blades was carried out using the Computational Fluid Dynamics (CFD) method, three models are 11, 13, and 15 blade impeller turbines designed at water with a runner diameter of 200 mm, blade thickness of 2 mm and an angle of 30 degrees then simulated using Comsol Multiphysics against different water flow rates. The simulation results show that the 11-bladed turbine model I has better performance because it has a lower pressure value but has a better velocity value compared to the two models simulated
The influence of the number of recycling cycles on the thermal and physical properties of polypropylene Cahyo Budiyantoro; Harini Sosiati; J. Wawan Joharwan
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.3976

Abstract

Plastic recycling has become one of the approaches used to reduce environmental pollution caused by plastic waste. This study explores the influence of the number of recycling cycles on the physical and thermal properties of polypropylene (PP) plastic, which is commonly found in plastic waste. Test samples were prepared by melting waste PP in various melting cycles, including 1, 3, 5, and 10 times. The thermal and physical properties of the test samples were observed using Differential Scanning Calorimetry and its viscosity, while its microstructure was observed using a Scanning Electron Microscope. The results showed that the higher the number of recycling cycles, the lower the melting temperature (Tm) and glass transition temperature (Tg) of the PP samples. This indicates a decrease in the crystallinity properties of PP as the number of recycling cycles increases. Additionally, the flowability of PP increases with an increase in the number of recycling cycles, which can be attributed to changes in the material's structure and physical properties. The results of this study can help PP manufacturers and users optimize the recycling process and improve the quality of the resulting products. Moreover, this study also contributes positively to energy and material resource conservation as well as reducing production costs.
Rotary speed control on Continuous Passive Motion (CPM) Therapy Machine Device with PI Control Antonius Hendro Noviyanto; Felix Krisna Aji Nugraha; Baskoro Latu Anurogo
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.v22i1.3934

Abstract

Continuous Passive Motion (CPM) Machine is a therapeutic device that is used to assist the process of therapy and recovery of a patient after having joint surgeryor injury of the ankle. In this research, a CPM machine will be developed for ankle joint therapy. The rotation speed of the CPM machine will be controlled by a DC motor which is used to drive the ankle joint therapy device.Speed control for DC motor is used on a therapeutic device (CPM machine) to determine the level of the therapeutic process; therefore this device can be adjusted to the needs of the patient who will use the therapeutic device. Speed control of the DC motor that will be carried out in this research is using Proportional Integral (PI) control. With the PI control, the result of output will always be compared with the set point value. The result of this comparison will provide an error value, which later the error value will be processed by PI control.The PI values used in this research are Kp 5 and Ki 15.The test results of the CPM movement speed show that the difference between the set point and the resulting movement is 1 RPM. Where the speed tested on this tool is 3 RPM and 5 RPM.  So, the output of this device will be as expected. In brief of this research, a therapeutic device that can be adjusted the rotational speed as expected.
The Effect of SiC and Cu Weight Fraction on the Characteristics of Al 6061 Composite Sumarji Sumarji; Danny Febriansyah; Mahros Darsin; Wazirotus Sakinah; R. Puranggo Ganjar Widityo
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3280

Abstract

Composites are made of multiple materials that are combined to create new materials with better properties. The purpose of this study is to determine the effects of SiC and Cu weight fractions on hardness, tensile strength, microstructure and scanning electron microscopy (SEM) of Al 6061 composites. The manufacturing method used for creating composites in this study was stir-casting. Each composite component and its functions are as follows: aluminum 6061 as the matrix, silicon carbide (SiC) as a reinforcement, and copper (Cu) functions to improve the characteristics of the composite. Variations were made by weight composition of SiC (1%, 3%, and 5%) and Cu (5% and 8%). Observations were carried out on their hardness, tensile strength, and microstructure; each of which using Rockwell hardness test B (ASTM E 18 standard), a multipurpose tensile testing machine, and SEM, respectively. The results of this study indicate that the addition of SiC and Cu affects the aluminum 6061 characteristics. The best result of the hardness test was shown at Al6061 + 5% SiC + 8% Cu (109.37 HRB). The best tensile strength (UTS) test result was shown at Al6061 + 5% SiC + 8% Cu (211.8 MPa) with elongation number of 2.8%. There has been a significant reduction in grain size under micro observations that occurred very well but was still relatively not uniform. The result of several SEM observation phases formed by the combination of Al6061 and the addition of 5% SiC + 5% Cu and 8% Cu showed an observation phase of AlZnMgCu, α (Al) + AlZnMgCu, Al2Cu, and Al2CuMg.
Design and simulation of offshore crane structure with capacity of 400 ton Freddy Marpaung; Harry Purnama; I Nyoman Artana; Nani Kurniawati; Dian Samodrawati; Tri Surawan; Harini Agusta
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4162

Abstract

Offshore cranes are transport machines which are  used to lift a heavy load to other places. The weight and strength of a crane are crucial parameters that must be considered during the design stage. There are many ways to optimize these aspects, such as suitable material selection and virtual simulation assistance using ANSYS software. The main goal of this study is to design and develop a structurally stable crane on the ship deck. This crane is modeled using CATIA software and analyzed using ANSYS software to obtain stress and displacement distribution on the crane structure. Maximum load is applied for four different elevation angles, namely (30°, 43°, 60°, and 80°). From the static structural simulation, the highest stress is obtained when the elevation angle of 30° is about 1030 MPa and deformation is 461.24 mm. The minimum fatigue life of the offshore crane at a luffing angle of 43° is 659.14 cycles.

Page 32 of 51 | Total Record : 503

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