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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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Analysis of wind speed and direction as support for green buildings in urban areas using the weibull method Yudi Kurniawan; Ida Bagus Dharmawan; Wahyu Anhar; Akhmad Nurdin
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.v21i2.3266

Abstract

Currently, the dominance of electricity in Indonesian providers comes from fossil energy which has the potential to increase the average temperature in various parts of the world or is called global warming. The contribution of the national renewable energy potential mix in 2016 ranging from 6.27%, then reaching 11.28% in 2020. The Government has made a long-term plan for the national renewable energy mix to reach 25% in 2025 and 31% in 2050. One of the renewable energy sources is wind energy, which is usually built on a large scale and is separated from settlements so that a long distribution network is required. Conversely, on a small scale, wind energy can be utilized with a simpler distribution network, this concept is called Small Wind Turbine. For a good wind turbine is designed according to the wind characteristics in real-time, so it is necessary to study wind mapping. This research was conducted as a prelude to observing wind characteristics in the form of mapping wind speed and direction in real-time in the northern part of Balikpapan City Region, using the Automatic Weather Station instrument which was carried out August 6 to September 26, 2022. Data processing in this study using the Weibull distribution method with Microsoft Excel. This study shows an average speed of 1.118 m/s in wind conditions with high wind variability with strong gusts, with a power density value of 1.157 Watts/m2. The wind direction tends to be east after the wind gusts are blocked by the building profile.
Performance materials with variations of tractor drive wheel fin angle and low-cost manufacturing analysis saraswati, Sherly octavia; Purnomo, Endra Dwi; Aziz, Amiruddin; Nandar, Cuk Supriyadi Ali; Utomo, Setyo Margo; Marsalyna, Marsalyna; Nugroho, Fandy Septian; Amelia, Lia; Mubarak, Achmad Ridho; Hotma, Lambert
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.v22i3.4649

Abstract

Nowadays, the demand for workers in the agriculture industry has decreased and there is a need for rising mechanization in the agriculture process. The agriculture process that requires mechanization is cultivating. The rice cultivator has to be as light as possible, so requires a lighter material but is also strong enough. The correlation between the rice transplanter tool and the wheels is closely related to soil conditions. The selection of wheel materials is considered based on the characteristics of the planting area. In addition, another influence variable is the angle of the fin in the rice transplanter wheel. Material of rice transplanter wheel has been established, these are 1023 carbon steel sheet, AISI 1020 steel cold rolled, AISI 316 stainless steel. The angle of the fin was varied, these are 30, 35, and 40, this fin will give an effect on the traction result of rice transplanter wheel movement. The combination of lightweight material and the appropriate fin angle of the rice transplanter wheel has the best traction result. As a result of this research, the suitable material for the rice transplanter wheel was carbon steel and the fin’s angle was 30. This research involved a comparison and analysis of material strength under various fin angles. The evaluation of stress criteria was conducted using design values to determine the most reliable final product design. The paper contributes by illustrating how to represent the final decision on the combination of design and materials, incorporating a cost index assessment.
Pengaruh masukan panas proses pengelasan terhadap sifat mekanik baja AISI 1045 suatu kajian analitis dan analisa numerik Hamdani - Hamdani
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.v17i1.827

Abstract

Pada penelitian ini sembilan buah benda uji pelat baja AISI 1045 dilas dengan pengelasan SMAW  dengan tiga variasi arus,tegangan, dan kecepatan pengelasan, yaitu 80 A, 90 A, dan 100 A. Voltase pengelasan 20 V, 25 V, dan 28 V. Kecepatan pengelasan 2 mm/detik, 3 mm/detik, dan 4 mm/detik. Untuk masing-masing variasi diuji sebanyak tiga spesimen. Kemudian hasil pengelasan dipreparasi sehingga membentuk spesimen uji tarik standar JIS Z 2201 No 14A. Kemudian dilakukan pengujian tarik untuk mengamati distribusi tegangan dan kekuatan tarik pada spesimen uji. Spesimen hasil pengujian kemudian dianalisis dengan metode numerik menggunakan program ANSYS. Analisa tegangan dilakukan dengan memberikan beban sesuai dengan hasil pengujian tarik. Simulasi dilakukan dengan memasukkan efek masukan panas dan temperatur pada daerah HAZ. Hasil pengujian eksperimental  menunjukkan bahwa masukan panas proses pengelasan mempengaruhi sifat mekanik baja AISI 1045. Masukan panas yang besar menghasilkan kekuatan tarik yang rendah. Parameter masukan panas dengan arus 80 A, tegangan 20 V, kecepatan pengelasan 2 mm/dtk menghasilkan kekuatan tarik sebesar 428 MPa. Semua spesimen yang diuji tidak putus pada daerah lasan, ini menandakan bahwa sambungan las dengan elektroda yang digunakan dan parameter pengelasan yang diberikan menghasilkan kekuatan sambungan yang baik. Terdapat perbedaan antara tegangan hasil pengujian dengan simulasi sebesar 4,1%, hal ini disebabkan antara lain adalah faktor geometri, pembebanan dan mesh. Kata kunci: SMAW, masukan panas, pengujian, simulasi, kekuatan tarik   AbstrackIn this study nine pieces of AISI 1045 steel plate were welded by welding SMAW with three variations of current, voltage, and welding speed, namely 80 A, 90 A, and 100 A. Welding voltage 20 V, 25 V, and 28 V. Speed welding 2 mm / sec, 3 mm / sec, and 4 mm / sec. For each variation three specimens were tested. Then the welding results are prepared so that they form a standard JIS Z 2201 No 14A tensile test specimen. Then a tensile test is performed to observe the stress distribution and tensile strength of the test specimen. The test specimens are then analyzed by numerical methods using the ANSYS program. Voltage analysis is carried out by giving a load according to the results of tensile testing. Simulation is done by entering the effect of heat and temperature input on the HAZ region. The experimental results show that the heat input of the welding process affects the mechanical properties of steel AISI 1045. Large heat input results in low tensile strength. The heat input parameter with a current of 80 A, a voltage of 20 V, a welding speed of 2 mm / sec produces a tensile strength of 428 MPa. All specimens tested did not break up in the weld area, this indicates that the welded joints with the electrodes used and the given welding parameters produced good joint strength. There is a difference between the test result voltage and the simulation of 4.1%, this is due to, among others, geometry, loading and mesh factors. Keywords: SMAW, heat input, testing, simulation, tensile strength
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.
Comparative analysis of energy-efficient air conditioner based on brand Adriansyah Adriansyah; Desmarita Leni; Ruzita Sumiati
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.v21i4.3625

Abstract

The availability of numerous air conditioners in the market with various brands and types often leads consumers to be unaware that the purchased air conditioner may be inefficient in terms of energy usage. This research aims to determine the most energy-efficient air conditioner based on the brand of air conditioners available in the market. The research method consists of four stages: data collection, data preprocessing, data analysis, and interpretation of results and conclusions. The data used in this study was obtained from the database of the Directorate General of New, Renewable, and Energy Conservation (EBETKE), which consists of 11 AC brands sold in the market. Data analysis was performed using data distribution analysis techniques, standard deviation calculations, and correlation analysis between variables, such as the Pearson's correlation coefficient. The results of this study show that the AC brand with the highest average efficiency value is Mitsubishi Electric, with a value of 16.36 Energy Efficiency Ratio (EER), while the AC brand with the lowest average efficiency value is GREE, with a value of 5.640 (EER). Each AC brand has a different average efficiency value, with significant variations. From the correlation heatmap results, the AC power does not appear to significantly affect the AC efficiency value, where AC with lower power tends to have higher efficiency values, but there are also AC with high power and high efficiency values. Additionally, the cooling capacity value also appears to have a small effect on the AC efficiency value, where AC with lower cooling capacity tends to have higher efficiency values. However, some AC brands have high cooling capacity values but also have high efficiency values. This study also shows a moderate correlation between the AC efficiency value and the AC's annual energy consumption value, where AC with higher efficiency values tends to have lower annual energy consumption values.
Perancangan dan fabrikasi mesin extrusi single screw Sumardi Indra Mawardi
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.v7i1.1348

Abstract

Penelitian ini dilakukan dimulai dari desain sampai mesin ekstrusi dapat digunakan. Mesin ekstrusi yang dibangun adalah tipe single screw. Pada penelitian ini perubahan bentuk produk tersebut akan dianalisis dengan memvariasikan temperatur proses terhadap temperatur melting dari jenis plastik polypropylene. Temperatur proses yang digunakan sebagai variabel bebas pada penelitian ini adalah 165", dan 180”, C, dan putaran screw konstan 60 rpm. Bentuk produk adalah batangan silinder dengan ukuran die 5 mm. Dari hasil penelitian ini telah dibangun sebuah mesin ekstrusi single screw. Dengan menggunakan bentuk dan dimensi ekstruded sebagai indikator keberhasilan maka, temparatuer proses yang sesuai untuk mesin dengan single screw padaperbandingan L/D — 14 pada kisaran 180" C.Kata-kata kunci : Ekdtrusi, Single screw, plastik, polypropylene
Analisa baku tingkat kebisingan di kota Lhokseumawe Fakhriza Fakhriza
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.v7i2.1381

Abstract

Kebisingan   merupakan   salah  satu polutan   yang  sering  mendapat   protes   dan pada   umumnya merupakan  hasil sampingan  pemanfaatan   teknologi   oleh  manusia.    Diperkotaan    kebisingan merupakan salah satu sumber stress yang bersumber dari suara mesin mobil, mesin-mesin industri,   alat  transportasi,   suara  pabrik   dan  sumber   suara  lainnya.   Kebisingan    ini membuat orang mengalami ketegangan jiwa.  Penelitian ini  bertujuan untuk mendapatkan Baku Tingkat   Kebisingan   Daerah    Kota   Lhokseumawe,     yang  akan   dibandingkan   dengan   Baku Tingkat·  Kebisingan   Keputusan  Menteri   Negara  Lingkungan  Hidup.   Dari  hasil pembahasan dapat   dilihat   perbandingan    Baku   Tingkat   Kebisingan    Daerah   Kota   Lhokseumawe     pada umumnya masih di bawah Baku Tingkat Kebisingan Keputusan Menteri Negara Lingkungan Hidup   (tabel  5. I  Perbandingan   Tingkat  Kebisingan).    Pada  kawasan  tertentu  nilainya   lebih tinggi  karena   letak  kawasan   tersebut  di jalan  utama  yang padat   dengan  kendaraan.Kata Kunci  :  Kebisingan, Suara,  Baku  Tingkat  Kebisingan
Comparison Between a Thermosiphon and a Wick Heat Pipe Performance with Temperature Difference Fazri Amir; Samsul Rizal; Razali Thaib; Hamdani Umar; Nasruddin A Abdullah
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.v21i1.3001

Abstract

The heat pipe (HP) is a fundamental heat transfer component frequently utilized for energy recovery in heating, ventilation, and air conditioning (HVAC). However, a heat pipe transmits heat from the hot side (evaporator) to the cold side (condenser), resulting in a temperature difference on both sides. There are numerous methods for measuring heat pipe performance. Using the temperature difference between the evaporator and condenser, the performance characteristics may be evaluated. The objective of this study is to compare the thermal performance of thermosiphon and commercial wick heat pipes (WHP) utilizing water as the working fluid and varying temperatures between the evaporator and condenser. The copper thermosiphon and commercial wick heat pipe had a diameter of 10 mm, a length of 800 mm, and a vacuum pressure of 5000 Pa. The filling ratios range between 30% and 50%, and it was evacuated at a pressure of 5000 Pa; the hot water temperatures at the evaporator were 30, 50, 70, and 90 ºC. Temperature was steadily increased every 30 minutes, and variations were observed at multiple places, including hot water, evaporator, and condenser wall. The average difference in temperature between the WHP and thermosiphon was around 0.6 degrees Celsius. The decreased temperature difference (T) indicates that the heat pipe is performing well. In addition, if the temperature difference is very great, the HP will dry up, therefore the WHP performs better than the thermosiphon.
Quality And Productivity Analysis Of The Putty Dispenser In The Armature Balancing Process A Fauzi, Abdul Syukur; Balqis, Balqis; Putri, Farika Tono; Herlambang, Yusuf Dewantoro; Khoryanton, Ampala; Satito, Aryo; Nugroho, Wahyu Isti
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.v22i1.4226

Abstract

An electric motor is a device that converts electrical energy into mechanical energy. One of its  important components is the armature which functions as the center of movement. Armature is paired with another component of electric motor. In order to achieve a good quality of electric motor, armature quality must be controlled through a standard experiment called balancing test. An adhesive material called putty will be added into armature if the balancing test result is not up to standard. This study conducted in one of automotive industry in Indonesia. The company face a problem in balancing test process. Putty addition carried by factory workers only based on their estimation, resulting in the mass of putty used not in accordance with predetermined standards and also inconsistent, so that the balancing process takes a long time. This research offer a solution for the problem, i.e. putty dispenser to replace the manual putty-picking process with a standardized semi-automatic one. The research objective is to analyze the quality and productivity of the putty dispenser tool design in the armature balancing process. Through 100 armature samples consist of type A and type B, this study examines the quality of the putty mass provided using the most frequently occurring value and uses the independent T-test method to examine the hypothesis that there is a real difference in cycle time before and after the putty dispenser tool. Frame strength testing was also carried out using Solidworks software simulation with 632 N loading. The results of the research on the putty dispenser tool are that the frame used is proven safe, a decrease in cycle time with a percentage of 34.16%, an increase in productivity of 34.13%, also improved quality through the aspects of %NG reduction of 42.29%, and a standardized and constant putty mass of 100 mg for armature type A and 200 mg for armature type B.
Hardening pada baja aisi C 1045. Adi Saputra Ismy
Jurnal POLIMESIN Vol 3, No 2 (2005): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v3i2.1450

Abstract

Sifat mekanik suatu logam tidak hanya tergantung dari komposisi kimia; tetapi juga pada struktur mikro dan proses perlakuan akhir. Pengerasan (hardening) adalah salah satu bentuk perlakuan panas dimana pengerasan dilakukan dengan memanaskan baja di daerah austenit, kemudian didinginkan cepat. Untuk itu telah disiapkan 15 buah. material uji baja AISI CI045 dengan pengaruh perbedaan temperature austeniusasi 800,850, 900, 950, 1000° C dan media pendingin air, oli SAE 20/40 dan emulsi Satu bual: material yang tidak dikeraskan digunakan  sebagai pembanding peningkaian kekerasan. Komposisi karbon pada baja AISI CI045 adalah 0,43 - 0,50%. Hasil penelitian memperlihatkan bahwa kecenderungan peningkatan kekerasan terjadi tidak hanya dipengaruhi oleh naiknya temperature pemanasan tetapi juga laju pendinginan, dimana kekerasan optimum diperoleh pada temperature 850°C, holding time 15 menit dan pendinginan air, yaitu HV = 572,2. Kekerasan maksimum dengan media pendingin  emulsi diperoleh nilai kekerasan HV = 427,8 juga   pada temperature 950° C.

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