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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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Pengaruh matrik resin-epoxy terhadap kekuatan impak dan sifat fisis komposit serat nanas Ade Irvan Tauvana; Syafrizal Syafrizal; Mokhamad Is Subekti
Jurnal POLIMESIN Vol 18, No 2 (2020): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i2.1841

Abstract

Pineapple leaf fiber is currently widely used in furniture and handicraft industries because it is easy to obtain, inexpensive, does not endanger health, can reduce environmental pollution so that later on as a composite reinforcing fiber can overcome environmental problems The choice of epoxy resin as a base material is caused the strength and stiffness of Epoxy resins is greater compared to other types of polymers. This study was intended to see the impact strength of pineapple fibers resin-epoxy and the fracture material of the specimen with macro photographs. The test specimens used pineapple fiber with volume fraction, 10%, 30%, 50% and epoxy resin matrix and hardener as hardener. The specimen is made by casting and mica as a mold. Mechanical testing using impact test, Physical test using photo macro structure. The result of the impact study obtained the impact price on the fraction of 50% volume that is equal to 0.76 J / mm2, this occurs because the fraction of fiber volume of 50% in addition to the distribution of the uniform force by the matrix is also supported by the ideal fiber, from the results of the above research In Can the optimum fiber volume fraction is at 50% volume fraction.
Pla-zno nanocomposite paper for antimicrobial packaging application Teuku Rihayat; Suryani Suryani; Adi Saputra Ismi; Nurhanifa Nurhanifa; Shafira Riskina
Jurnal POLIMESIN Vol 17, No 2 (2019): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v17i2.1033

Abstract

Many food packages (plastic wrappers) today cannot be broken down by the environment. therefore, it is necessary to add natural substances that can make the food package decompose and be resistant to contamination with bacteria. Development of biodegradable polymers from renewable sources is highly desirable for food preservation and packaging, provided they can be effective as plastics or paper that are currently used in packaging, protecting food against microbial contamination, physical damage and chemical reactions (eg oxidation). Poly lactic acid (PLA) is one of the natural polymers produced by several bacteria that grow in crops rich in carbohydrates (such as sugar beets, corn and others). This research aims to insert ZnO nanoparticles and chitosan into a plastic layer of PLA (poly lactic acid) which can improve the antibacterial properties of the resulting packaging. The method used in making PLA-ZnO-chitosan nanocomposite is the precipitation method and the heating method. PLA-ZnO nanocomposites were obtained by varying ZnO nanoparticles 0.5% by weight, 2% by weight, and 3.5% by weight. The results obtained in SEM images show that nanoparticles are homogeneously distributed on the plastic surface. Antimicrobial tests show nanocomposites work effectively in deactivating E. coli and S. aureus. where it was found that E. coli was more susceptible to this type of nanocomposite, where there was a reduction of 3.4 logs to 3.5% ZnO loading in the PLA layer.       
Enhancing mechanical properties of waste expanded polystyrene composites through varied coupling agents and wood powder formulations Budiyantoro, Cahyo; Yudhanto, Ferriawan
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4234

Abstract

This study investigates Wood Plastic Composites (WPCs) by incorporating waste Expanded Polystyrene (EPS) and various wood powder reinforcements. The mechanical properties of WPCs play a pivotal role in sustainable material development. Our research delves into the effects of different treatments on wood powders and their interactions with the polymer matrix.Pine, teak, and silk tree wood powders underwent alkali immersion and coupling agent treatments. The ensuing composites underwent rigorous testing, including flexural strength, hardness, and impact resistance assessments.The findings underline the complex factors governing WPC mechanical properties. Pine-based WPCs, reinforced with pine wood powder and subjected to alkali treatment, exhibited the highest flexural strength at 29.56 MPa, whereas the lowest flexural strength of 14.65 MPa was observed in WPCs reinforced with alkali-treated teak wood powder. The highest impact strength quantified at 2.54 kJ/cm², was found in untreated pine wood powder-based WPC. In contrast, the lowest impact strength was identified in teak wood powder-based WPC treated with alkali.
Pemanfaatan energi terbarukan : Satu kajian pemanfaatan energi surya untuk pembangkit listrik di Universitas Samudra Munira Amudy; Adi Musfadry; Hamdani Umar
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.v19i2.2155

Abstract

Ketersediaan energi suryalebih tinggi dari konsumsi energi global, keterjangkauannya untuk penggunaanya relatif sederhana, dan ramah lingkungan. Institusi pendidikan tinggi seringkali memiliki banyak gedung dengan atap yang besar serta hamparan lahan tak terpakai yang cocok untuk instalasi tenaga surya. Tujuan dari studi ini adalah untuk melakukan analisa kelayakan terkait pemasangan pembangkit listrik tenaga surya di institusi Pendidikan, dengan studi kasus pada kampus Universitas Samudra. Dari hasil analisis diperoleh untuk penyediaan listrik berdaya 10 MW, penggunaan panel PV lebih unggul dibandingkan menggunakan kolektor parabola. Biaya produksi listrik panel PV sebesar 6.60 ¢/kWh, sedangkan kolektor parabola membutuhkan biaya 26.42 ¢/kWh. Dan kebutuhan ruangan untuk pemasangan panel PV lebih kecil dibandingkan dengan penggunaan kolektor parabola
Pemasangan karet mounting sebagai alternatif penurunan getaran pada traktor roda dua Mohd. Arskadius Abdullah
Jurnal POLIMESIN Vol 7, No 1 (2009): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v7i1.1345

Abstract

Sejalan dengan peningkatan jumlah penduduk dunia pada umumnya dan Indonesia pada khususnya, diperlukan peningkatan produksi pertanian untuk mencukupi kebutuhan sumber tenaga yang paling praktis dipergunakan oleh traktor roda dua di lapang adalah yang berasal dari enjin bakar internal. Enjin bakar internal yang umum dikenal adalah enjin diesel dan enjin bensin. Kedua jenis enjin ini, memiliki keunggulan dan kelemahan. Kelemahan yang menonjol dari enjin diesel adalah besarnya getaran dan tingginya tingkat kebisingan yang ditimbulkannya. Sedangkan keunggulannya dari enjin diesel, apabila diterapkan pada traktor roda dua adalah memudahkan dalam perawatan. Dengan pemasangan karet peredam (mounting) jenis karet alam shore A 78 (Ma78), getaran yang ditimbulkan oleh enjin pada traktor roda dua dapat tereduksi (turun) percepatan (akselerasi) getaran sesuai dengan ketebalan karet alam yang dipasang pada traktor roda dua. Pada kenyataannya ketebalan karetdengan ketebalan H25 mm lebih mampu meredam getaran.Kata kunci : mounting, getaran, shore, akselerasi.
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.
Peningkatan Efisiensi Kerja Dengan Penerapan Digital Standard Operating Procedure (SOP) Pada Proses Manufaktur (Studi Kasus: Mesin Bubut Konvensional) Irvando Anto Verry Damanik
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2670

Abstract

The development of the use of digital-based technology has become a challenge as well as an opportunity in Industry 4.0 era, especially in the manufacturing industry. The machining process is one of the important and dominant part in the implementation of the manufacturing industry, so it is necessary to find a way to get the expected results with time efficiency in the process because it will be a factor that determines the total operating costs incurred. To optimize all used resources and minimize engine idle time, the Digital Standard Operating Procedure (DSOP) method is a solution. DSOP is one step in digital transformation in order to optimize guidelines for the implementation of the machining process which also replaces working papers as operator guidance on the production floor. The method is used to compare the time required by the operator in carrying out the machining process using the DSOP with the old method. From the day of observation, it was found that there was a time saving of up to 50% by the operator, compared to conventional machining process methods. Digital SOP also provides a more communicative guide accompanied by complete pictures of the products made, as well as videos on how to set-up tools and workpieces on machines. With the use of digital-based SOPs, the time required for operators is shortened and SOP is understood more accurately from planning, monitoring until implementing, which are presented digitally
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
Rancang bangun furrower untuk pembuatan Saluran drainase pada laban beralur Samsul Bahri; Tajuddin Tajuddin
Jurnal POLIMESIN Vol 7, No 2 (2009): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v7i2.1388

Abstract

Budidaya tanaman tertentu dilakukan pada lahan beralur. Untuk menjaga keseimbangan air pada lahan  dibutuhkan  sistem  drainase   yang  baik:    Studi   kasus  pada   budidaya  tebu  menunjukkan pembuatan  saluran  drainase  dilakukan  menggunakan  alat  khusus  berupa rotary  ditcher  yang ditarik  traktor  roda empat dan diputar  oleh  tenaga  PTO traktor.   Di samping    itu juga diigunakan furrower   yang  hanya  ditank   oleh  traktor  roda  empat.    Penggunaan furrower   lebih  disukai  di lapangan  karena lebih sederhana  dalam penggunaan  maupun pemetiharaannya. Namun, saluran yang  dihasiikan  masih belum  mempunyai  bentuk dan dimensi yang diharapkan.  Bentuk saluran yang    diinginkan    adalah    trapezoidal,    sedangkan   furrower   yang   selama    ini   digunakan menghasilkan    bentuk   saluran    kerucut.   Untuk  mengatasi    permasalahan    tersebut   dapat dikembangkan   furrower   dengan    modifikasi  pada  bentuk    dan    ukuran.   Hasil   pengujian menunjukkan furrower  yang  dirancang  menghasilkan  saluran  drainase  masih berbentuk  kerucut dengan  ukuran lebar penampang  atas 97  cm,  dan kedalaman  43 cm. Untuk itu, masih diperiukan adanya  modifikasi furrower  pada  ukuran pisau  bajak dan singkal, terutama pada pisau  potong yang tidak memenuhi kriteria desain.Kata  kunci  : Furrower, lahan beralur,  sa1uran  drainase,  bentuk dan ukuran.
Micro Hydro Power Plant (MHP) performance using breast-shot waterwheel with different electrical load to improve efficiency Herlambang, Yusuf Dewantoro; Bono, Bono; Suwoto, Gatot; Hermawan, Baktiyar Mei; Sumarno, F. Gatot; Margana, Margana; Marliyati, Marliyati
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.v22i3.4608

Abstract

The aim of this study is to investigate the performance of breast-shot waterwheel with different electrical loads to increase efficiency. The method used is to design a pinwheel blade using blade material with a supporting frame added to the top, middle, and bottom of the pinwheel blade. The blade material used a thickness of 1.5 mm with angle iron installed on the three sides of the blade with a size of 30 mm × 30 mm × 3 mm. Tests were carried out with variations in lamp load when the water flow rate and water velocity were constant. Parameters measured in this test are water flow rate (m3/s), velocity of water (m/s), head of water (m), generator rotation (rpm), electric current (A), and generator output voltage (V). The results of the Hydro Power Plant (MHP) test with a waterwheel drive with the highest efficiency value at a water discharge of 0.267 m3/s, a velocity of 5.069 m/s, a generator rotation of 940 rpm, and a load of 840 W, which is 10.74%.

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