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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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Otomatisi pembangkit program nc berdasarkan gambar input autocad 2d untuk machining centre mc-520 Bukhari Bukhari
Jurnal POLIMESIN Vol 1, No 1 (2003): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v1i1.1391

Abstract

Part program NC merupakan prosedur yang menentukan urutan proses dan posisi pahat relatif terhadap benda kerja yang harus di ikuti oleh mesin untuk membuat suatu komponen produk tertentu. Pembuatan part program NC membutuhkan seorang programmer yang mampu membaca gambar teknik dengan baik, mengenal proses permesinan, dan mampu mengubah informasi gambar tersebut secara benar. Dalam makalah ini dipresentasikan sebuah program pembaca file gambar AutoCAD yang berformat *DWG (Drawing) terlebih dahulu dirubah kedalam format *DXF (Drawing Interchange Format). Semua isi file yang di inputkan dibaca dari awal sampai akhir, yang kemudian disimpan dalam sebuah buffer data. Pada tahap selanjutnya buffer data tersebut akan diekstraksi guna pendefinisian jenis feature, origin feature, dan dimensi feature. Berdasarkan tiga informasi data tersebut maka program pembaca file gambar akan membangkitkan sebuah part program NC dalam format Bahasa manual (G-Code) untuk penerapan pada mesin MC-520. Penggunaan program pembangkit program NC ini dalam suatu proses akan dapat menekan anggka kesalahan input data pada saat pembuatan program NC, mereduksi waktu pembuatan program NC yang secara keseluruhan juga akan mengurangi waktu produksi.
The Effect of Electric Current On Hydrogen Gas Production Using Water Electrolysis Process Wardhana, Asepta Surya; Yuliatin, Umi; Yasmin, Amida
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.v22i1.4659

Abstract

New renewable energy sources are being developed to replace conventional energy sources such as biofuels, electric cars, and solar cars in the transportation sector. However, this generation has limitations in that it requires external energy sources to be converted into electricity.This study examined the development of alternative energy sources through water electrolysis to produce hydrogen. The factors affecting the electrolysis process, such as the catalysts and external voltage, were investigated. The study successfully implemented hydrogen production using a wet cell electrolysis reactor design involving components such as an Arduino, MQ-8 gas sensor, and DS18B20 temperature sensor. This study used a reactor with electrodes of six plates, where the electrode plates werethe anode and cathode of three plates each. Hydrogen levels were measured using an MQ-8 semiconductor sensor. The test results showed that varying the current in the electrolysis reactor increased the hydrogen concentration to a maximum of 3405.77 PPM. A decrease in hydrogen levels occurred after 20-40 minutes due to the saturated electrolytes. Factors such as the ion concentration, hydration, ion attraction, and temperature also influence the conductivity of the solution duringelectrolysis. The results of this study obtained a minimum average hydrogen content of 646.054 PPM and a maximum of 2932.306 PPM. The reactor temperature conditions were stable at an average temperature of 27°C.
Perawatan pumping unit bukaka tipe C228 di PT. Pertamina EP Asset 1 Field Rantau-Kualasimpang Jenne Syarif; Darmein Darmein; Khaidir Fadillah
Jurnal POLIMESIN Vol 14, No 1 (2016): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v14i1.298

Abstract

Pumping unit ini adalah jenis pompa sucker rod yang menggunakan metode artificial lift yang paling baik diterapkan di sumur-sumur dangkal dan sedikit atau tidak adanya gas yang terproduksi bersama minyak. Dalam pengoperasiannya, pompa sucker rod memiliki banyak masalah yang sering timbul, diantaranya adalah tidak sesuainya laju produksi yang diinginkan dengan laju produksi sebenarnya. Gangguan- gangguan permasalahan yang sering terjadi pada pumping unit type C228 ini biasanya Terjadi keausan pada wrish pin bearing dan patahnya gigi-gigi plate clutch perawatan yang harus dilakukan pada keausan yaitu dengan menerapkan perawatan sebagai berikut: Perawatan mingguan (Pelumasan) Perawatan bulanan (Pergantian Komponen) Keadaan operasi tiap hari di amati dan di catat, setiap keadaan yang tidak normal mudah ditemukan sehingga dapat segera diatasi. Hindari semua komponen yang dapat merusak pompa, baik itu didalam pengoperasiannya ataupun perawatannya, lakukan berdasarkan prosedur yang tepat. Kerja sama dalam perawatan pumping unit ini sangat diharapkan sehingga target pengoperasian dapat tercapaiKata Kunci: Pumping Unit, Perawatan, Keausan,Pengoperasian
Pengaruh kecepatan potong (Vc) terhadap kekasaran permukaan pada pembubutan kering baja ASTM A 29 menggunakan pahat karbida berlapis Titanium Aaluminium Nitrida (TiAlN) rudi salam; sunarto sunarto
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1025

Abstract

Peningkatan kualitas produksi harus disertai dengan kualitas produk yang digunakan. Pada bidang permesinan kualitas permukaan suatu benda kerja dapat dipengaruhi oleh beberapa faktor seperti suhu pemotongan, kecepatan pemotongan, sudut pemotongan, kedalaman potong dan material yang digunakan dalam proses pembubutannya. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variabel dan kondisi pemotongan terhadap hasil kekasaran permukaan pada proses pemesinan bubut. Penelitian ini dilakukan secara eksperimental menggunakan pahat karbida berlapis Titanium Alumunium Nitrida (TiAlN) pada pemotongan baja ASTM A 29 menggunakan cairan pemotongan dan tanpa menggunakan cairan pemotongan (Dry Machining). Pengukuran kekasaran dilakukan dengan terlebih dahulu menetapkan kondisi pemotongan dengan mesin bubut. Hasil yang didapat pada proses pembubutan kekasaran permukaan terendah berada pada nilai (µm) 1.535 dengan parameter kecepatan potong (Vc) 250 m/mnt, gerak makan (f) 0.1 mm/putaran, dan kedalaman potong (a) 1.5 mm dengan kondisi pemesinan basah, sedangkan kekasaran permukaan tertinggi berada pada nilai (µm) 2,077 dengan parameter kecepatan potong (Vc) 250 m/mnt, gerak makan (f) 0.1 mm/putaran, dan kedalaman potong (a) 1.5 mm dengan kondisi pemesinan kering. Dapat disimpulkan bahwa kekasaran permukaan terendah berada pada proses pemotongan basah menggunakan pahat karbida pada pemotongan material baja ASTM A 29 dengan (Vc) 250 m/mnt. Kata kunci : Kekasaran permukaan, pahat karbida, baja ASTM A 29, pemotongan kering, bubut Effect of cutting speed (Vc) on ASTM A 29 surface roughness by dry turning using a cutting tool as Aluminum Nitride Titanium coated titanium (TiAlN) Abstract Increasing the quality of the production must be accompanied by the quality of the product used. In the machining field, the surface quality of a workpiece can be influenced by several factors such as cutting temperature, cutting speed, cutting angle, cutting depth and the material used in the turning process. The purpose of this study was to determine the effect of variables and cutting conditions on the results of surface roughness in the lathe machining process. This research was carried out experimentally using a Titanium Aluminium Nitride (TiAlN) coated carbide tool on ASTM A 29 steel cutting using cutting fluid and without using cutting fluid (Dry Machining). Roughness measurement is done by first setting the cutting conditions with a lathe. The results obtained in the process of turning the lowest surface roughness are at a value (µm) 1.535 with cutting speed (Vc) parameters 250 m / min, feed motion (f) 0.1 mm /rotation, and depth of cut (a) 1.5 mm with wet machining conditions, while the highest surface roughness is at the value (µm) 2.077 with cutting speed (Vc) parameters 250 m / min, feed motion (f) 0.1 mm / rotation, and cutting depth (a) 1.5 mm with dry machining conditions. It can be concluded that the lowest surface roughness is in the wet cutting process using a carbide tool on cutting ASTM A 29 steel material with (Vc) 250 m / min.
Design of photovoltaic/thermal (PV/T) with heat pipes as a heat transfer medium used for water heater Rahmat Iman Mainil; Afdhal Kurniawan Mainil; Azridjal Aziz; Faisal Afif
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3298

Abstract

One of the main obstacles for developers and users of photovoltaic (PV) modules is that the module temperature is too high due to high solar radiation and a higher ambient temperature, which reduces PV efficiency. A photovoltaic/thermal (PV/T) system is a technique developed for absorbing heat, that combines PV with a solar thermal collector (STC). In this research, heat pipes are used as the heat transfer medium. This paper aims to design a PV/T system for water heating and examines the thermal performance and water temperature that can be achieved by PV/T. In designing PV/T, the method used is to estimate the intensity of solar radiation and determine the size of the thermal collector, thermal insulation, type of working fluid, and heat pipe filling ratio. The PV/T thermal performance is also tested after the system design has been built. The design parameters that have been obtained are the PV area of 0.67 m2 and the volume of heated water of 20 liters. This design proposes water as the working fluid of the heat pipe with a filling ratio of 10%. The system performance indicates that PV/T could heat the water to 50.9 °C with energy absorbed by the water of 1.85 MJ, and the maximum thermal efficiency of PV/T is 27.14%. The results show that PV/T has a very promising future in terms of its ability to use heat energy and can be further developed for future research so that it can encourage people to use environmentally friendly renewable energy
Analysis of nitrogen adsorption capability at various activation temperatures of Klaten natural zeolite Caroko, Novi; Sukamta, Sukamta
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.4882

Abstract

The Pressure Swing Adsorption (PSA) method operates by passing air through an adsorbent to produce concentrated oxygen gas. Zeolites are commonly utilized as adsorbents due to their ability to adsorb nitrogen from the surrounding air. Two types of zeolites commonly employed are natural and synthetic zeolites. While the utilization of natural zeolites as adsorbents in oxygen purification remains limited, their potential as an alternative adsorbent is worth exploring in this field. This study focused on developing physically activated Klaten natural zeolite as an adsorbent to enhance oxygen purity. Physical activation involved heating for 1.5 hours using an electric oven at four temperature variations (250ºC, 300ºC, 350ºC, and 400ºC). Additionally, four distinct flow rates were tested: 0.1; 0.5; 1.0; and 1.5 lpm. Oxygen purification testing revealed that higher activation temperatures led to greater increases in oxygen concentration. The highest increase of 2.45% was achieved at an activation temperature of 400ºC, while the lowest increase of 1.75% was observed at 250ºC with a flow rate of 0.1 lpm. With a 10-minute holding period, oxygen content during the adsorption process ranged from 1.35% to 2.45%, compared to 0.60%-0.75% without holding. Physical activation of zeolite from Klaten enhanced its nitrogen absorption capacity, indicating the potential of natural zeolite from Klaten for oxygen purification through optimized activation processes, possibly via chemical activation
Sistim pengeringan ikan dengan metode hybrid Muhammad Hatta; Ahmad Syuhada; Zahrul Fuadi
Jurnal POLIMESIN Vol 17, No 1 (2019): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v17i1.666

Abstract

Sistem Pengeringan dengan metode hybrid merupakan sistem pengeringan yang menggunakan dua atau lebih sumber energi untuk proses penguapan air. Pengering hybrid pada penelitian ini menggunakan sumber energi matahari dengan bantuan solar kolektor dan energi bahan bakar gas. Penelitian ini merupakan alternatif teknologi untuk kasus pengeringan ikan. Tujuan dari penelitian ini adalah untuk meningkatkan temperatur udara panas ruang pengering hybrid, melakukan optimalisasi waktu pengeringan dan menghitung kadar air pada ikan. Penelitian ini dilakukan di halaman Fakultas Teknik Universitas Syiah Kuala. Hasil pengukuran temperatur tertinggi ruang pengering tanpa bahan/ikan dengan menggunakan kolektor surya adalah 43 oC dengan intensitas cahaya matahari tertinggi 915 W/m2, setelah menggunakan metode hybrid temperatur tertinggi ruang pengering dengan kondisi ada bahan/ikan meningkat sampai 67 oC dengan intensitas cahaya matahari tertinggi 908 W/m2. Pengeringan menggunakan energi hybrid relatif lebih singkat yaitu 8,5-13 jam sedangkan pengeringan secara tradisional membutuhkan waktu selama 3 hari dengan kondisi cuaca cerah dan intensitas cahaya matahari yang tinggi. Tingkat penguapan kadar air mencapai 30,25% - 38,18 % untuk ikan karang/ikan kakap merah, dan 53,30% - 57,13% untuk ikan teri. Kata kunci: Pengering Hybrid, Kadar Air, Temperatur, Kolektor Surya dan Energi Bahan Bakar Gas. AbstractDrying System with hybrid method is a drying system that uses two or more sources of energy for the evaporation process of water. Hybrid dryers in this study use solar energy sources with the help of solar collectors and gas fuel energy. This research is an alternative technology for cases of drying fish. The purpose of this study is to increase the heat temperature of the hybrid drying chamber, to optimize the drying time and calculate the moisture content of the fish. This research was conducted in the laboratory of the Faculty of Engineering of Syiah Kuala University. The highest temperature measurement of the drying room without materials/fish using solar collector was 43 oC with the highest solar light intensity of 915 W/m2, after using hybrid method the highest temperature of drying chamber with the condition there was fish/ingredients increased up to   67 oC with the highest sun light intensity is 908 W/m2. Drying uses hybrid energy was relatively shorter 8.5-13 hours while drying traditionally takes 3 days with sunny weather conditions and high sunlight intensity. The rate of water vaporization reached 30.25% - 38.18% for lutjanus campechanus, and 53.30% - 57.13% for stolephorus commersonii, Lac.).  Keywords : Hybrid Dryer, Water Content, Temperature, Solar Collector and Energy Fuel Gas.
Design optimization of sleeve finger splint model using Finite Element Analysis Zakki Fuadi Emzain; Utsman Syah Amrullah; Am. Mufarrih; Nanang Qosim; Yusuf Dewantoro Herlambang
Jurnal POLIMESIN Vol 19, No 2 (2021): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i2.2272

Abstract

One of the rehabilitation alternatives for fingers injuries is to use a finger splint. Some existing finger splint models still use excessive material, and the size is not appropriate. The purpose of this study was to propose a customized sleeve finger splint model with a conical shape along with the finger surface from the proximal phalanges to the distal phalanges. Design optimization using topology optimization was carried out to reduce mass and volume while maintaining the stress strength of the model. The stages of the method in this research were modeling design, preprocessing analysis, topology optimization, and postprocessing analysis. Topology optimization design was set with 70% mass in response constraint. The analysis results showed a significant reduction in the model mass of 42.18%, from 6.78 grams to 3.92 grams. Meanwhile, the maximum equivalent stress increased slightly by 3.42%, from 8.12 MPa to 8.4 MPa. Even though there was an increase in equivalent stress after topology optimization, the sleeve finger splint model was still categorized as safe, with a safety factor of 3.39.
Implementation of 3000-watt inverter as a source of electrical energy in solar power plants Partaonan Harahap; Noorly Evalina; Faisal Irsan Pasaribu; Rimbawati Rimbawati; Benny Oktrialdi; Rahmatullah Rahmatullah; Munawar Alfansury Siregar
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.v21i4.3626

Abstract

In industry, an inverter is a tool/component for adjusting the speed of an electric motor. By using an inverter for electric motor purposes, it becomes a variable speed, whereas the speed can be changed or adjusted as needed. The method used in this study is an experimental research method, namely designing and measuring the system under study. Measurements are made for non-electrical quantities, namely the inverter of the solar module which is generated by the intensity of sunlight hitting the surface of the solar cell. Measurements are also made for electrical parameters such as current, voltage, power factor, and power. Based on the data obtained from all the tests that have been carried out, the system output voltage cannot reach the expected 220 Volts. Because changes in load affect the output voltage of the system were occurred, as the load of 60 W/220V is added, the output voltage drops to 740.5 Volts. As the load is reduced by 60W/220 V, the output voltage increases by 786.9 Volts, within the average inverter efficiency of 77%.
Modifikasi optimasi mesin pengiris buah-buahan dan umbi-umbian pada mekanisme batang peluncur dengan penambahan double slider Marzuki Marzuki
Jurnal POLIMESIN Vol 8, No 1 (2010): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v8i1.1333

Abstract

Pengirisan buah-buahan (Singkong, Sukun, Pisang, Ketela, Kentang,) pada industri rumah tangga untuk dijadikan makanan ringan dalam bentuk keripik dan asinan dewasa ini masih dilakukan secara manual dengan menggunakan tenaga manusia. Penggunaan mesin pengiris umbi-umbian dan buah-buahan yang menggabungkan mekanis dan elektris belumlah efisien dalam mengoptimalisasi kapasitas produksi dan pengirisan buah-buahan dengan variasi profil irisan sehingga hasil irisan masih belum maksimal. Mekanisme engkol peluncur pada mesin sebagai dudukan mata potong masih menimbulkan slip dan getaran. Modifikasi pada mekanisme batang peluncur dengan penambahan double slider telah meningkatkan performa mesin mencapai 20 Y6 dari sebelumnya terhadap hasil keluaran. Hal ini dimungkinkan oleh semakin mulusnya gerakan mata irisan tanpa menimbulkan slip dan getaran sehingga memberikan tingkat keseragaman hasil irisan dan keseragaman ketebalan. Pengujian unjuk kerja 1 unit mesin setara dengan 4 - 5 orang pekerja yang mahir/ahli dengan kemampuan untuk variasi bentuk pemotongan dan ukuran dengan sistem mata potong yang dapat ditukar sesuai dengan kebutuhan sehingga dapat meminimalkan waktu penyelesaian proses pengirisan dan menekan biaya dan ongkos produksi.Kata kunci: Mekanisme Batang Peluncur, Slider, Batang Luncur, Profil irisan, Efisiensi mesin

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