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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 11 Documents
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Search results for , issue "Vol 19, No 2 (2021): Agustus" : 11 Documents clear
Application of topology optimization technique in sand casting process of a complex product based on FDM 3D printing technology Nguyen Huu Tho; Nguyen K. Dien; Trinh T. Tho; Nguyen V. Thanh; Nguyen V. A. Duy
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.v19i2.2115

Abstract

Design optimization is one of the emerging CAE technologies thanks to the robust and strong structure of the computer and the ability to create complex designs using material additive technology. Recent modern innovations in 3D printing technology have made metal casting new breakthroughs. The demand of many products with complex shapes and geometries becomes very high. This makes the 3D printing more helpful and meaningful to contribute in the field of product design and development. This study presents an integrated framework for the implementation of complex 3D product design from fundamental technologies of CAD/CAE/AM (Computer Aided Design/Computer Aided Engineering/Additive manufacturing). Then, we apply casting technology to create models for products with complex shapes from FDM 3D printing technology. This integrated process is essential in assisting engineers to quickly design and create prototypes, and to fully control errors occurring during prototyping through CAD/CAE simulation to improve production efficiency of businesses and reduce time to bring products to customers. The experiment of sand casting based on the mold core from AM technology confirmed that the integrated approach is effective and applicable in the practice at manufacturing enterprises.
Study on improving thermal and compatibility behavior of gypsum PLA/stearic-lauric acid composite as phase change material Nurhanifa Aidy; Rozanna Dewi; Azhari Azhari; Teuku Rihayat; Aida Safitri; Adi Saputra Ismy
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.v19i2.2278

Abstract

Commercial buildings, one of which is for hospitality, consumes a large amount of energy. The energy needs are generally dominated by lighting systems, domestic hot water systems and air conditioning systems. Energy consumption in commercial buildings and residential use of 35.3% of the total global energy use. The aim of this study is to investigate thermal properties and chemical compatibility of PCM based eutectic fatty acid (lauric-stearic) combined with polylactic acid in the pores of the gypsum that was established using the vacuum impregnation method. The procedure ensures that pla 1.5% and 2% with Lauric-Stearic (LA-SA) are mixed evenly, compared with pure gypsum and LA-SA addition. Based on TGA test  specific lauric acid and stearic acid heat analysis was performed in the modulated tga mode between 90.34oC and 369.51oC. The degradation material decreased significantly at -3.404 mg. Sample mixed between Poly lactid acid, eutectic fatty acid and gypsum  contain hydroxyl groups with significant absorptions for ft-ir analysis. The bonded oxygen-hydrogen stretching vibrations of lactid acids and gypsum,  range between 2000 and 3000 cm-1. Similarly, alcohols exhibit similar shapes at higher wavenumbers ranging from 3230 to 3550 cm-1.
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
PRODUCT DESIGN SIMPLIFICATION TO INCREASE COMPETITIVENESS WITH A VALUE ENGINEERING APPROACH TO THE WASTAFEL FLEAN INDUSTRY Ruspendi Ruspendi; Anthon Rudy W; Riki Effendi
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.v19i2.2050

Abstract

The strength of international competitiveness encourages companies to do optimization. Therefore, the increase in productivity which improves competitiveness must be done. The purpose of this study is to look for the best solution to optimize designs with the best value and cheapest engineering approach that can be executed on the sink faucet production. After a value engineering, obtained high-cost items such as components with brass/metal, local and imported material. Then look for alternative designs with cost criteria, namely Life Circle Cost (LCC) and the Initial Cost as well as with zero one non-cost criteria matrix and pairs matrix. The result obtained a design that qualifies for the product by replacing the faucet's construction and dimensions but still meets the requirements of comfort, functionality, and safety in use. With this alternative earned savings of 19.6% of the total cost.
PENGARUH VARIASI FRAKSI VOLUME FILLER TERHADAP SIFAT MEKANIK KOMPOSIT RAMBUT MANUSIA BERMATRIKS EPOXY DENGAN PENGUAT TALC POWDER Eko Nurprasetyo; Kardiman Kardiman; Ratna Dewi Anjani
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.v19i2.2283

Abstract

Komposit adalah gabungan dari dua atau lebih material berbeda yang terdiri dari serat dan matriks. Penelitian ini menggunakan serat rambut manusia, talc, matrik epoxy dan hardener. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi fraksi volume filler terhadap sifat mekanik dari komposit epoxy-rambut dan komposit epoxy-rambut-bubuk talc. Pembuatan komposit dengan metode hand layup dengan spesifikasi variasi fraksi volume sebanyak 6 buah dan pengujian yang digunakan adalah uji SEM, uji tarik ASTM D-638, uji bending ASTM D-790, dan uji impak ASTM D-6110. Hasil studi komposit rambut epoxy menunjukkan bahwa semakin rendah fraksi volume rambut akan meningkatkan kerapatannya. Hasil pengujian menghasilkan bahwa uji tarik dengan nilai terbesar diperoleh dari fraksi volume 60% epoksi: 20% rambut: 20% bedak bernilai 1,58 kg/mm2. Uji bending fraksi volume epoksi 60%: 20% rambut: 20% bedak sebesar 4,26 kg/mm3. Uji impak tertinggi diperoleh dari fraksi volume rata-rata epoksi 60%: 40% rambut dengan nilai 4,07 kJ/m2 . Hal ini terjadi karena dari hasil uji tarik, uji bending, dan uji impak selain pendistribusian gaya yang merata oleh matrik juga didukung oleh serat yang mampu terikat dengan talcnya. Jadi unsur penambahan yaitu talc powder mempengaruhi sifat mekanik yaitu kekuatan impak, tarik,dan bending. Composite is a combination of two or more different materials consisting of fibers and a matrix. This research used human hair fiber, talc, epoxy matrix and hardener. The purpose of this study was to determine the effect of variations in filler volume fraction on the mechanical properties of the epoxy-hair composite and the epoxy-hair-talc powder composite. The manufacture of composites using the hand layup method with a specification of 6 volume fraction variations and the tests used were the SEM test, the ASTM D-638 tensile test, the ASTM D-790 bending test, and the ASTM D-6110 impact test. The results of the study of epoxy hair composites showed that the lower the volume fraction of the hair, the higher its density. The test results showed that the tensile test with the largest value was obtained from the volume fraction of 60% epoxy: 20% hair: 20% powder with a value of 1.58 kg/mm2. Epoxy volume fraction bending test 60%: 20% hair: 20% powder at 4.26 kg/mm3. The highest impact test was obtained from the average volume fraction of 60%: 40% hair epoxy with a value of 4.07 kJ/m2 . This happens because from the results of the tensile test, bending test, and impact test, in addition to the uniform distribution of forces by the matrix, it is also supported by fibers that are able to bond with the talc. So the added element, namely talc powder, affects the mechanical properties, namely the tensile and bending impact strength.
Studi perbandingan perilaku lelah AISI 316L dengan menggunakan metode eksperimen dan simulasi Fakhriza Fakhriza; Syifaul Huzni; Murtadhahadi Murtadhahadi; Abubakar Dabet
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.v19i2.2302

Abstract

Fatigue failure occurring at a material in the dynamic loads is very dangerous because it is happen without initial guidance, fatigue testing to predict the life of use need to be done. This study focused on AISI 316L stainless steel which is used in industries because it’s mechanical properties, weldability, corrosion resistance and good machining. Fatigue testing are based on ASTM E466 and E468 standard in laboratory’s environmental by using fatigue testing machine rotary bending type. The results of fatigue testing present in   S-N curve, it showed that the endurance limit of stress 277 MPa at 2870667 cycles. For comparison, from the simulasi carried out, the stress is 258 MPa at 2870667 cycles. In terms fatigue life, the material is categorized in the high cycles and fracture pattern is low stress
Studi perhitungan sistem pengkondisian udara dari desain kantor pabrik kelapa sawit berbasis cooling load temperature difference Sabilly Handi Pradana; Deni S Khaerudini
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.v19i2.2093

Abstract

Perhitungan sistem pengkondisian udara diperlukan agar kebutuhan penggunaan total daya masih dalam rentang yang diizinkan. Sehubungan terbatasnya sisa daya yang tersedia dari pabrik kelapa sawit (PKS) untuk suplai ke sistem pengkondisian udara sebesar 184 kW, diperlukan perhitungan untuk mendapatkan total beban pendingin yang terdiri dari beban sensibel dan laten dari seluruh ruangan. Penelitian ini bertujuan untuk menentukan beban daya pendingin dari desain ruang kantor PKS di Kalimantan Barat serta membandingkan sisa daya yang tersedia. Perhitungan dilakukan dengan menggunakan metode Cooling Load Temperature Difference (CLTD) berdasarkan standar dari American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). Mengacu pada hasil perhitungan didapatkan bahwa total beban sensibel lebih besar daripada beban laten dengan perbandingan 1: 3,18. Komponen yang membutuhkan beban pendingin maksimum adalah jendela kaca sebesar 12,96 kW. Ruangan yang membutuhkan daya beban pendinginan maksimum adalah lobi sebesar 8,66 kW. Beban pendinginan maksimum daya total adalah 51,5 kW pada jam 16.00. Beban daya pendingin dibandingkan dengan sisa daya yang tersedia dari PKS sebesar 184 kW. Daya untuk pendinginan ruang kerja adalah 4,5% dari total penggunaan daya di PKS. Pada kondisi ini pabrik masih dapat beroperasi dengan peningkatan faktor beban dari 86,4% menjadi 90,4%.
Konsep desain dan perbaikan produk Ankle Foot Orthosis menggunakan metode kansei engineering Suhendrianto Suhendrianto; Sarika Zuhri; Hafidzah Andra Nalimaruscha Tarigan; Asbar Asbar
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.v19i2.2149

Abstract

Stroke is a non-infections disease that can cause death. The impact of stroke is leg muscles getting weaken so leg cannot be used normally. This condition occurs due to leg muscles are not frequently used and the experience a decrease in muscle mass as a result of the stroke condition. Foot that cannot be used normally can be treated by doing therapy and wearing an ankle foot orthosis (AFO). AFO is an orthopedic aid that is attached to the foot. The benefits of AFO are to improve the structure of the legs and help users to return to walking normally. This research was conducted to redesign AFO by identifying customer need and emotions towards AFO products through the Kansei Engineering method. The study was conducted by distributing 12 pairs of Kansei questionnaires up to 20 respondents through a quota sampling technique. The results were analyzed using multivariate statistics. The data processing used to compile the design element questionnaire. This questionnaire combines two categories for each design item. Respondents can choose which the best design combination. The selected design parts are open design with webbing tight type, the selected material is combination of plastic and steel, and the unobtrusive color. The design result is used as a reference for AFO design and manufacture.
Pengaruh iradiasi dan temperatur terhadap efisiensi daya keluaran pada pemodelan photovoltaic Canadian solar 270 Wp Mochammad Iedvan Maulana; Viktor Naubnome; Jojo Sumarjo
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.v19i2.2286

Abstract

Matahari sebagai sumber energi yang tidak terbatas sangat menguntungkan terhadap Indonesia dengan letak astronomis yang berada digaris khatulistiwa dan beriklim tropis. Dengan memiliki iklim tropis (musim hujan dan kemarau) mengakibatkan penyinaran energi radiasi lebih kurang 12 jam menjadikan Indonesia cukup untuk memanfaatkan PLTS sebagai sumber energi pengganti. Pemanfaatan Pembangkit Listrik Tenaga Surya ini salah satunya adalah dengan teknologi yang disebut Panel Surya atau Photovoltaic. Berbeda dengan Negara 4 musim, Indonesia memiliki nilai temperatur lingkungan rata-rata lebih tinggi dan Iradiasi yang berubah-ubah. Tujuan Penelitian ini adalah untuk memodelkan dan menganalisa lebih lanjut hubungan antara pengaruh Iradiasi dan temperatur terhadap efisiensi dan daya keluaran serta daya optimum rata-rata yang dapat dihasilkan panel surya sehingga penempatan photovoltaic dapat dimanfaatkan sesuai dengan kondisi Iradiasi dan temperatur disekitarnya. Berdasarkan hasil simulasi pemodelan menunjukan Daya keluaran maksimum yang dihasilkan Photovoltaic Canadian Solar CS6K-270 Wp berbanding lurus secara signifikan dengan iradiasi matahari, Pada saat iradiasi tertinggi sebesar 876,11 W/m², daya keluaran yang dihasilkan pun tinggi sebesar 214,35 Watt, namun perubahan temperature terhadap daya keluaran selama 7 hari cenderung fluktuatif. Pada saat temperature tinggi sebesar 32,7°C daya keluaran yang dihasilkan kurang maksimal yaitu sebesar  202,21 Watt. Sedangkan Nilai Efisiensi Photovoltaic Canadian Solar CS6K-270 Wp berbanding terbalik dengan iradiasi. Pada saat Iradiasi tertinggi dan bersifat fluktuatif mengakibatkan penurunan Nilai Efisiensi yang signifikan bernilai 16,11% - 16,09 %, sedangkan pengaruh temperatur yang signifikan mengakibatkan Nilai Efisiensi menurun namun tidak terlalu drastis
Geometry Improvement and Flow Simulation in the water level control valve based on the CAD/CAE and DOE integrated system Nguyen Huu Tho; Phan Hoang Phung; Huynh Van Nam; Nguyen Vu Anh Duy
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.v19i2.2114

Abstract

Floating valve is a type of valve which can open and close automatically based on the level of water in the tank by Archimedes force without using electric-based control signals. However, there are no engineering reports of the influences of factors to the liquid flow through the valve with the considerations of multiple objective obtimization based on design of experiments (DOE) in the context of our country until now. Many products in the domestic market have been paid more attention by the customers but still have several disadvantages such as the practical malfunctions of floating valve. Thus, this study presents an integrated approach of CFD simulation and DOE-based multi-criteria optimization for proposed valve design. This technique allows to identify the influencing factors to the valve’s goals of volume flow rate and the force which exerts into the rubber rubber to create a gap distance in order that the float valve can operate. In this study, several factors used as inlet pressure, a gap distance of rubber sheet, pressure vent hole diameter and orifice diameter. CFD (computational fluid dynamics) based simulation technique integrated into experimental design assists us to determine the most suitable dimensional and operational parameters of water level-control float valve. The numerical simulation results confirmed that design valve are appropriate and potential in the practice. The integrated simulation framework can be considered a general and effective way to analyze several types of other valves.

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