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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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An experimental study on parabolic trough solar cookers with materials collector of chrome stickers and glass mirrors Amin, Muhammad; Rizal, Teuku Azuar; Amir, Fazri; Abdullah, Nasruddin A; Ginting, Suma Fachruri
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4521

Abstract

Cooking, a fundamental human necessity, frequently relies on environmentally harmful energy sources. Concentrated solar power offers a promising solution through solar cookers to address this issue. This study assesses a Parabolic Trough Collector (PTC) solar cooker's performance with two reflector materials: chrome stickers and glass mirrors. The PTC-type solar cooker comprises essential components, including an absorber tube, a flexible conduit, and a spiral-shaped cooking container holder that accommodates a diverse range of cooking vessels. In the configuration of the PTC collector, reflectors fabricated from chrome stickers and glass mirrors are strategically employed to harness and concentrate solar radiation effectively. The absorber tube, crafted from copper, is filled with a heat-transfer fluid consisting of soya oil. Experimental investigations were conducted in a two-stage process, encompassing trials without any applied load and subsequently with varying loads. In the no-load experiments, alterations were made to the PTC collector's inclination angle, spanning the ranges of 15º, 20º, 25º, and 30º. In contrast, the load-bearing tests encompassed the assessment of the PTC solar cooker's performance under a diverse array of cooking scenarios, including boiling water, heating oil, frying eggs, and crisping crackers. The evaluated parameters encompassed key metrics such as incident solar radiation (Ir), ambient temperature (Ta), receiver temperature (Tr), fluid temperature (Tf), spiral furnace temperature (Tsf), and load temperature (To). Subsequently, the outcomes of the experiments were employed to determine the efficiency of the solar cooker. Analysis of the no-load test results indicates that the most favorable performance, as observed in the parameters Tr, Tf, and Tsf, is achieved at a collector inclination angle of 15º for both chrome sticker and glass mirror reflector materials. The solar cooker demonstrated commendable proficiency in boiling water, heating oil, frying eggs, and crisping crackers, accomplishing these tasks within a time frame ranging from 5 to 20 minutes. Notably, the solar cooker featuring the glass mirror reflector exhibited a superior thermal efficiency of 33.7%, surpassing the efficiency of the counterpart with the chrome sticker reflector, which registered an efficiency of 30.9%. These findings underscore the efficacy of the glass mirror reflector in harnessing solar energy for enhanced cooking performance within this solar cooker configuration.
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.
Kajian Teknis Kapasitas Produksi dan Efisiensi Kerja Conveyer Belt Dalam Pengiriman Batubara Menuju Stockpile Di PT. Singlurus Pratama Faisal Manta; Reza Naufal Hanifudin
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.v20i2.2529

Abstract

PT. Singlurus Pratama has a fairly high mining productivity, so a stockpile is needed as a temporary coal storage place. Stockpile owned by PT. Singlurus Pratama has a capacity of 140,000 tons. The crushed coal is carried by a conveyor belt to be transported to the stockpile. Conveyor belt at PT. Singlurus Pratama has different sizes so that the efficiency of each belt for transporting coal varies. In the next planning, an increase in production targets will be carried out, so research is urgently needed on the efficiency value of each type of belt owned. This data is needed to determine the type of belt that is in accordance with the production target so as to provide optimal conveyor belt service life performance. Efficiency calculation begins by measuring the value of the theoretical and actual production capacity of each type of belt to get the value of the production rate index (PRI). PRI is the value of work efficiency based on two load conditions, namely minimum and maximum, then the value of work efficiency for all types of belts at PT. Singlurus Primary is known accurately. In the study, it was found out that the production capacity of conveyor belts in coal delivery to the stockpile for type BC-01, BC-02, BC-03 and Tripper Cars were 1,690, 1,698, 1,742, 2,371 tons/hour, with the lowest value for type BC-01. and the highest value of the Tripper Car type. The minimum load efficiency values for the conveyor belt types BC-01, BC-02, BC-03 and Tripper Car are 22.2, 22%, 22% and 16%, respectively. The maximum load efficiency values for the conveyor belt types BC-01, BC-02, BC-03 and Tripper Car are 37%, 37%, 36% and 26%, respectively. Then the minimum and maximum workload efficiency values are the highest on the BC-01 type and the lowest on the Tripper car type.
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
Pengaruh drainase terhadap penurunan permukaan air tanah pada areal bekas penambangan gambut Nur laili
Jurnal POLIMESIN Vol 6, No 2 (2008): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jop.v7i2.1377

Abstract

Tanah gambut di Ine resia seluruhnya ditaksir mencapai 16-27,7 Juta ha yang tersebar sebagian besar di kepulauan S umatera, Kalimantan, Jawa, Bali, Muluku / Nusa Tenggara dan Irian Jaya, Tanah gambut di Inu snesia umum nya mendominasi wilayah sepanjang pantai, serta belum ada di peroleh data yang jelas mengenai jumlah luas tanah gambut atas dasar bahan asal, cara pembentukan, jenis pelapukan dan ketebalan bahan Organic nya. Metode penelitian yang di lakukan adalah metode uji pompa sumur di tigadesa sekitar lokasi bekas penambangan. Hasil penelitian menunjukan bahwa daerah penelitian di areal bakas panambangan seluas 775 Ha dengan uji pompa sumur di tiga desa mempunyai angka trasmisivitas (Koefesien Keturusan air) gambut terdaapat di desa Siharjulu sebesar 2,02 m'/hari yaitu mempunyai akuifer tufa riodasit berselingan dengan gambut dan stroragen coefesien yang lebesar yaitu 1,01x 10” di lokasi Siharjulu, nilai tersebut sangat berpengaruh terhadap sifat fisik tanah gambut dan penurunan airtanah. Sehingga pasokan air untuk irigasi mengalami kekeringan dan menurun nya produktifitaspertanian.Kata kunci : Drainase, gambut, transmisivitas, akuifer tufa riodasit, storage coefesien, eksploitasi.
Characteristics of temperature uniformity system in multi-tier drying equipment with sharp turning technology afandi, dedi; Syuhada, Ahmad; razali, razali; maulana, muhammad ilham
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4693

Abstract

Drying is a process of heat and mass transfer that occurs on the surface and within the material to be dried. It helps reduce the internal moisture of the material, inhibiting the growth, damage, and chemical changes of microorganisms during storage, thus extending the shelf life of dry materials and improving the quality of raw materials. This study aims to test multi-level drying equipment using combustion heat with a square shape and racks inside it used as the drying space for the material. The raw material was placed on racks made of perforated metal. This  research started from designing the drying equipment system, fabricating and testing system. The drying system was tested using fish and cocoa beans as sample materials. The tested equipment system included temperature distribution in the combustion chamber, distribution system of hot combustion gases through sharp turning technology, uniform temperature distribution in the drying chamber with 8 levels of racks, each capable of holding a load of 10 kg, and testing of the chimney system. The research findings concluded that to maintain a drying chamber temperature of 90⁰C, an average combustion chamber temperature of 339⁰C was required. The average combustion chamber temperature needed to maintain a drying chamber temperature of 80⁰C was 290⁰C. For a drying chamber temperature of 70⁰C, an average combustion chamber temperature of 314⁰C was required. The temperature distribution inside the drying chamber moves horizontally, indicating that the temperature distribution in the drying chamber was uniform for each drying rack.
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.
Analysis of intake air temperature effect on performance of portable atmospheric water generation (PAWG) systems with heat sink angle orientation of 75o Muhamad Jafri; Ben Vasco Tarigan; Hairman Sahrudin Lanae
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3364

Abstract

The increasing demand for clean water and the diminishing supply of clean water sources can result in a clean water crisis. Air is a ubiquitous, inexpensive, and clean water source. Using Atmospheric Water Generators (AWG), the water contained in the air can be extracted. This study's objective was to determine the effect of inlet air temperature and air heater power variations on tool performance and PAWG condensate water production at a condenser angle of 75 degrees. The procedure utilized is experimental on three PAWG boxes. Each box has a distinct temperature at its entrance. The variation of inlet air temperature is accomplished by heating the air before it enters the box with an air heater; the applied power variations are 0.484 Watt, 0.964 Watt, and 1.702 Watt. The results demonstrated that variations in air heater power and inlet air temperature affected system performance and condensate water production. Maximum water discharge and PAWG performance were achieved when the air heating power was 0.48 watts and the water discharge was 1.166 milli liters per hour. At 0.0084 ml/h/W, the PSys system performance had the highest value. The variable air heating power of 0.946 Watt represents the utmost COP value of PAWG. This power variable has a high temperature difference and influences the COP value at high levels.
Analisa tegangan kait pada overhead travelling crane Fakhirza Fakhirza
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.v3i2.1447

Abstract

Kait (Jakal) merupakan salah satu komponen terpenting pada semua alat angkat. Tegangan kait merupakan salah satu hal yang menarik untuk dianalisa. Tegangan kait rata-rata dari kait (Ơ adalah (330+ 600) kg/cm. Dari tegangan tarik yang timbul didapat diameter dalam ulir (d1 ≥ 4,63 cm dan diameter lain dapat dilihat pada table ukuran standar ulir kasar metris berdasarkan harga d1. pemeriksaan tegangan yang terjadi dilakukan pada penampang yang paling berbahaya, dimana penampang yang paling berbahaya tersebut timbul tegangan tarik dan tegangan geser. Tegangan tarik terjadi pada penampang A-B, karena pada penampang A - B mengalami dua macam pembebanan. Sehingga menyebabkan sisi sebelah dalam tertarik dan sisi sebelah Iuar tertekan. Pada penampang  C - D akan terjadi tegangan geser, ini disebabkan gaya yang bekerja sejajar dengan penampangnya.
Perancangan mesin pencetak bantalan palet dari serbuk kayu Riki Effendi; Franka Hendra; M. Arief Hakim
Jurnal POLIMESIN Vol 15, No 2 (2017): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v15i2.375

Abstract

The background of the palette bolster printer machine production is the availability of waste sawdust in the large number. Waste sawdust is often regarded as a waste that its values and benefits cannot be felt yet. Sawdust can be used as the primary material for the production of palette bolster, so it becomes  valuable and useful. The method used in the machine production are reviewing literature and by doing calculations. The next stage is the production of machines and testing process to find out the success of the design. After the production process, it is obtained the machine results with dimensions of 380×150×510 (mm), with the production capacity of 2 products in one-time process. A good mixture composition of the sawdust and adhesive is 60:40 with a production capacity of 12 per hour, the machine is expected to provide benefits in the palette production. Key words: Adhesive, bolster, pallet, sawdust.

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