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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 30 Documents
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Search results for , issue "Vol 21, No 1 (2023): February" : 30 Documents clear
Design Analysis of Hydraulic Lifter Spreader Assy LRT Using Finite Element Method Ampala Khoryanton; Gutomo Gutomo; Sugeng Irianto; Farikah Tono Putri; Ahmad  Hamim S
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.v21i1.3249

Abstract

Spreader Assy is an integral part of the Jabodebek LRT train delivery. This part serves as an elevating device for the carriage. The installation of the spreader assembly to the train body poses a hazard to operators and work instruments, is too lengthy, and does not adhere to the Standard Operating Procedure (SOP). This issue is due to the implementation of the spreader assembly, which is still supported by crowbars, wood, and an iron plate. This study's objective is to analyze the design of the hydraulic lifter for the operator's convenience and safety when installing the spreader assembly. Hydraulic jack, base plate, and lifting plate are the primary components of this instrument. Based on FEA analysis, the stress that occurs in the hydraulic lifter construction after receiving the spreader assy load of 225.18 kg is between 3,312,239 N/m2 and 6,624,476 N/m2, whereas the yield strength of the SS400 material is 250,000,000 N/m2 because the stress is greater than the yield strength of the material. Since the maximum value is still well below the material's yield stress, it can be concluded that the hydraulic lifter construction can safely support the burden of the spreader assembly
Experimental Review of Cold Storage for Fishery Products in Aceh Island using Solar Energy Khairunnas Nas Khairunnas; Ahmad Syuhada; Sarwo Edhy Sofyan
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.v21i1.3519

Abstract

Data from the Ministry of Maritime Affairs and Fisheries shows that Aceh Province, with a coastline length of 2666.3 km stretching from east to west, holds a variety of marine wealth, both fisheries and other natural resources. The province of Aceh has archipelagoes spread over Aceh Besar and Aceh Singkil. The archipelago areas in Aceh Besar are Aceh Island, Rice Island and Nasi Island. The availability of electricity in the archipelago, namely on the island of Aceh, is only at 18.00 - 22.00 and 5.00 - 8.00. Because of this, a study was carried out on using solar electricity to drive compressors in cold storage. This study aims to determine the solar energy capacity and photovoltaic area required for cold storage with a capacity of 100 kg of fish, determine the temperature of the cold storage when operating with and without load and determine the coefficient of performance (COP) of cold solar storage over time. This research was conducted experimentally to test the use of cold storage for storing fish. The results showed that the cold storage temperature was -15.9 ℃ with an average current of 0.87 A, a voltage of 226.02 V and a power of 124.72 W when operating without load, while with a load, the temperature was -3.1 ℃ with an average current is 0.890 A, voltage is 225.88 V, and power is 127.96 W. The ideal COP value is greater than the actual COP value (8.07 2.69). To run cold storage using solar energy, a battery with a capacity of 120 Ah is required until it reaches a temperature of -3.1 ℃ lasts 2 – 3 days with 40% remaining battery usage and is recharged every day
Dove Tail Interlocking Tensile Stress Analysis Comparison of ABS and PLA Material in Solid Works Simulation Bertha Bintari Wahyujati; Felix Krisna Aji
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.v21i1.3286

Abstract

The Tensile Test Method on PLA material for product printing using a 3D printer will recommend the dove tail design as an interlocking part. The result of the design of the dove tail type as an interlocking join part is tested for the most optimal tensile strength. In this paper, consideration for the dove tail design used in material testing and will be printed using a 3D printer is in terms of technical ease of printing and technical testing of its physical form so that it can be gripped using a tensile test tool such as the Universal Tensile Machine (UTM). The dove tail design is designed with a scale representative size that meets the requirements of the standard clamp size of the test tool. Tensile force testing simulation using SolidWorks software will be used as a pre-tensile test analysis before being implemented by UTM. The results obtained are the deformation that is occurring, such as the PLA material having a higher deflection of 7,567 mm and the ABS material having a deflection of 1,897 mm. The strain on interlocking is 0.1081 for ABS material and 0.3988 for PLA material.
Implementation of PID Controller on Hohenheim Tunnel Dryer Using Ziegler-Nichols Approach Method Melinda Melinda; Rita Khatir; Ari Rahmat Putra Ibina; Alfatirta Mufti; Rizal Syahyadi; Iskandar Hasanuddin
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.v21i1.3472

Abstract

Hohenheim Tunnel Dryer has two heating mechanisms, namely the solar collectors and the greenhouse effect. Two outlet fans are used to remove moisture from drying as well as to lower the temperature in the drying chamber. Suppose the outlet fans are turned on continuously, the temperature in the drying room will not reach the optimal drying temperature, and vice versa if the outlet fans are not turned on, the drying temperature can exceed 60°C. Controlling these outlet fans manually is a very inconvenient thing and becomes an obstacle for accepting this drying technology by the farmers. Therefore, this study focused on the design of temperature control for the Hohenheim Tunnel Dryer by using a proportional integral derivative (PID) controller with an Arduino Nano microcontroller. It controls the fan outlet to obtain an optimal drying temperature so that the operation of this dryer becomes more accessible and more efficient. The temperature sensor used is DHT22. The tuning method chosen is the Ziegler – Nichols method, and the setpoint value is selected at 55, which is the optimum temperature for drying most agricultural products. The design, manufacture, and testing of the temperature control system on the Hohenheim tunnel dryer was successfully carried out without over shoot and steady state error so it can be concluded that the system has worked well.
Evaluation of Tubing Diameter and Bean Size for Optimization of Well Production Rate Arya Dwi Candra; Muhammad Firmansyah Hafidzullah; Rakha Reswara; Paradongan Siahaan; Dies Elita Budiyanti; Zainal Abidin
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.v21i1.3196

Abstract

Gas field development is a costly affair, thus it is essential that each component of the production system operates properly. The objective of field optimization is to discover the parameter range that maximizes productivity. In addition, the development of natural gas reserves for both fuel and petrochemical purposes is accelerating. Well X is an approximately 4-year-old natural-flow gas well with a gas flowrate of 7.7 MMSCF/D, condensate flowrate of 55 BCPD, and water flowrate of 2 BWPD. As fluid is generated from the reservoir to the surface, the production rate of the well decreases. This well's productivity was evaluated using nodal analysis in conjunction with a comparison of tubing size and bean size. aiming to satisfy gas demand without exceeding the critical limit. The nodal analysis approach is utilized to determine the well's optimal and efficient performance. Moreover, utilizing system analysis, which is a graphical plot between the tubing size and the resulting flow rate, as depicted in Figure 6, we can determine which tubing size delivers the highest or most efficient rate at a particular moment under constant wellhead pressure (node at the wellhead). If the demand grows by 14.4 MMSCF/D, the installed tube size can be changed to 40/64" for optimization purposes. This procedure is more cost-effective because it does not squander money and does not halt gas production at the well. To satisfy the increased gas demand of 14.4 MMSCF/D, the production operator can rotate the bean or choke from its initial 24/64" size to 40/64" size.
Effect of Volume Fraction and Alkalization Treatment on Mechanical Properties of Abaca Fiber Reinforced Composites as a Composite Board Substitute for Wood Products Abubakar Dabet; Zulmiardi Zulmiardi; Ferry Safriwardi
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.v21i1.3125

Abstract

Wood products are very popular products, especially in Indonesia. The drawback of wood products lies on their physical properties which are very susceptible to weathering in contact with water, causing wood products to be unsuitable for placing in parts of higher moisture. In addition, deforestation for processing wood products causes prolonged environmental damage. The main objective of this research is to make abaca fiber polyester composite material that can be used as a composite board for replacing wood product boards. The composite is made with varying the alkali solution treatment and fiber volume fraction by using the vacuum method (VARI).  Materials used in this study are abaca banana fiber, polyester resin, hardener and wax. The primary equipment used are such as tensile testing machine, freis machine, scanning electron machine (SEM), press machine, vacuum installation and digital scales as well as other supporting tools for composite preparation and fabrication. The research design for the preparation of composite test specimens used a polyester matrix and Abaca fiber reinforcement. Variation of alkalization solution used have rate of 1%, 3%, 5%, 7%, and 9%, and the volume fraction of abaca fiber is at 15%, 20%, 25%, 30% and 35%. The composite specimens test uses a tensile test ASTM D3039-76 standard, flexural test using the ASTM D790 standard and an impact test reaching the Charpy method. The results showed there are the highest tensile strength and modulus of elasticity were obtained from composites with specifications of 25%Vf and 5% alkali treatment of 186.89 MPa with a modulus of elasticity of 2.27 GPa. The highest bending strength value is found in the composite with a specification of 35%Vf and 5% alkali treatment with a bending strength value of 53,03 MPa. The highest impact strength value was found in the composite with a specification of 25%Vf and alkali treatment with a 5% concentration of 9,32 kJ/m2. Based on the mechanical properties data above, the composite specifications can be recommended for the manufacture of composite boards as a substitute for wood products at 35%Vf and 5% alkali treatment. 
Optimization of S-EDM Process Parameters on Material Removal Rate using Copper Electrodes Khoirudin Khoirudin; Sukarman Sukarman; Nana Rahdiana; Ade Suhara; Ahmad Fauzi
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.v21i1.3199

Abstract

This article demonstrates that the sinker electrical discharge machining (S-EDM) method can be enhanced using SPHC (JIS G 3131) materials with a hardened surface. During S-EDM, neither contact nor a cutting force exists between the electrode and the workpiece. S-EDM is advantageous because it eliminates mechanical stress, chatter, and vibration issues with traditional milling. S-EDM is widely employed, for example, in the manufacturing of molds for automotive and aviation components. Taguchi design and signal-to-noise ratio (S/N ratio) were selected to examine the impact of the input parameter model on the material removal rate (MRR). The Taguchi approach assessed three input parameters and three experimental levels. The parameters pulse current (I), spark time (Ton), and gap voltage (Vg) were chosen to evaluate the MRR performance of the S-EDM process with the SPHC-hardened workpiece material. Copper with a diameter of 10 mm is chosen as the electrode material. This study aims to determine the optimal MRR for the chosen input variables. Results indicate that a more effective pulse current value promotes debris removal from the machining zone and stabilizes following spark release, speeding the material removal rate (MRR). In the S-EDM machining process, the pulse current value significantly affects the MRR and is one of the most significant response variables
Optimization of Savonius Turbine Towards Different Inner Blade Positions to Improve Turbine Performance Yusuf Dewantoro Herlambang; Supriyo Supriyo; Budhi Prasetiyo; Abdul Syukur Alfauzi; Marliyati Marliyati; Wawan Purwanto; Fatahul Arifin; Zakki Fuadi Emzain
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.v21i1.3248

Abstract

The purpose of this study is to examine the performance of the Savonius turbine on the inner blade position in order to improve turbine efficiency. The blades used are a simplification of the Savonius U/L and the Savonius 1:2 double blade model. This research begins by creating four blade models: a single-blade model, a double-blade model at the blade's tip, a double-blade model at the blade's base, a single-blade model, and a double-blade model along the blades against the wind. The four models are then fitted in the test system for generator performance. Next, the efficiency characteristics of the turbine will be tested against rotation. The test results of the four models were evaluated by comparing each model's efficiency. The results indicate that the Savonius double-blade 1:2 and Savonius U/L turbines achieve efficiencies of 2.42% and 2.1% at 5 m/s and 7 m/s, respectively. At speeds of 5 m/s and 7 m/s, the double-tip position inner blade model increased by 81% and 61%, respectively. The double-tip inner blade variant has the maximum efficiency at 9 m/s, at 3.71 percent. Therefore, the Savonius U/L type vertical axis wind turbine with a 1:2 double blade is the most suited blade model for usage at wind speeds less than 7 meters per second. While the Savonius model with innovations in the inner blade double tip position is suitable for operation at wind speeds greater than 9 meters per second, the Savonius model without such advances is not
The Effect of Varying Torrefaction Temperature on the Physical and Mechanical Properties of Briquettes Made from King Grass Rifanida Rifanida; Adi Setiawan; Shafira Riskina; Abubakar Dabet; Alchalil Alchalil
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.v21i1.3274

Abstract

Indonesia is a country which has rich biological diversity. King grass (Pennisetum Purpupoides) is one of biological species which easily grow but has not yet been optimally used. This study examined the physical, mechanical, and thermal properties of bio-briquettes produced from king grass which has been torrefied at temperatures of 150˚C, 175˚C and 200˚C. Prior to torrefaction process, fresh king grass was chopped to a size 3 cm, dried under the sun for five days, and then put into the torrefaction reactor with a residence time of 45 minutes. The resulting solid product, i.e. bio-char was then pulverized and sieved to a particle size of 40 mesh, then mixed with 20% wt binder and stirred manually to reach homogeneous. Subsequently, a purposely made press machine was used to produce briquette at a pressure of 150 kg/cm2 followed by drying the product under the sun for three days. The briquette characterization employed several techniques including thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), bomb calorimeter, and mechanical testing. The results showed that the calorific value of king grass increased from 3747 cal/g to 4346 cal/g after the torrefaction process at a temperature of 175˚C. The results of the proximate test showed that the fixed carbon content increased from 4.76% to 25.75% after the torrefaction process at a temperature of 175˚C. In terms of mechanical properties, it is known that the torrefaction process of king grass has significantly improved the friability, density and size stability. Overall, this study has succeeded in revealing the potential use of briquette products made from king grass as alternative fuel for co-firing at steam power plant
The Influence of Annealing Temperature and Holding Time Near Glass Transition Temperature on the Tensile Strength of Fused Deposition Modeling Printed Polylactic Acid Michael Evan; The Jaya Suteja; Sunardi Tjandra
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.v21i1.3386

Abstract

Thermal annealing can be implemented to improve the mechanical strength of a 3D printing object. The critical parameters of thermal annealing are temperature and holding time. Based on the literature review, the implemented annealing temperature affects the required holding time. As the use of a lower annealing temperature and holding time can reduce the required heat and increase the process efficiency, this research investigates the implementation of the annealing temperature near glass transition temperature with a short holding time. The aim of this research is to investigate the influence of the thermal annealing temperature range from 65 °C to 85 °C and the holding time from 45 minutes to 75 minutes on the Ultimate Tensile Strength of a Polylactic Acid part printed by using Fused Deposition Modelling. The experiment implemented a 32-factorial design methodology with two replications. The experiment results indicate that the thermal annealing slightly exceeding glass transition temperature facilitates higher interlayer diffusion of raster and layers and consequently increases the Ultimate Tensile Strength. Meanwhile, the holding time does not influence the Ultimate Tensile Strength of the annealed part as the holding time range cannot accomplish the maximum crystallization for the annealing temperature range between 65 °C to 85 °C.

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