R.E.M. (Rekayasa Energi Manufaktur) Jurnal
Not a member yet
154 research outputs found
Sort by
The Effect of Pipe Diameter and Valve Opening Variations on Osborne Reynolds Apparatus Test : Pengaruh Variasi Diameter Pipa dan Bukaan Katup pada Alat Uji Osborne Reynolds Apparatus
No full textThe Reynolds number is a dimensionless number which is obtained from the ratio of the density, flow velocity and cross-sectional area of the fluid that passes through it. The Reynolds number is also a number used to determine flow characteristics in the form of laminar, transitional and turbulent flow. This research was conducted at the Basic Phenomenon Laboratory of Mechanical Engineering Study Program, Qomaruddin University using the Osborne Reynolds Apparatus test equipment by observing dyes flowing in a flowing fluid stream (water) so as to obtain the flow visualization. The pipe test section variations include 6 mm, 8 mm and 10 mm as well as variations in valve openings from 30°, 42°, 54°, 66°, 78° to 90°. Based on the research results, the lowest flow rate, flow velocity and Reynolds number were obtained for a 6 mm pipe for a 15o valve opening with respective values of 3.71 x 10-6 m3/s, 0.131 m/s, 958.87 and flow visualization shown is laminar flow. While the highest value was obtained for a 10 mm pipe with a 90o valve opening, each value was 1.287 x 10-4 m3/s, 1.639 m/s, 19957.04, and the flow visualization shown was turbulent flow
Numerical Analysis of Low Carbon Steel Tensile Strength Using Software (SolidWorks)
Full text linkPengujian tarik merupakan suatu mesin pengujian bahan yang paling mendasar. Pengujian merusak adalah salah satu pengujian untuk melihat kekuatan dan ketangguhan dari material. Pengujian ini sangat sederhana, tidak mahal dan sudah mengalami standarisasi di seluruh dunia, misalnya di Amerika dengan ASTM E-8 dan Jepang dengan JIS 2241. Penelitian ini ingin melihat besaran kekuatan bahan menggunakan metode elemen hingga. Metode elemen hingga (finite element method) merupakan metode numerik yang digunakan untuk menyelesaikan permasalahan dalam bidang rekayasa. Untuk meganalisa numerik menggunakan software SolidWorks. Material yang digunakan baja karbon rendah dan dibentuk geometrinya sesuai ASTM E8. Untuk melihat komposisi material digunakan microskop optical emission spectroscopy. Pengujian tarik eksperimen menggunakan mesin uji tarik Universal Test Machine dengan kapasitas maksimal 50 kN. Hasil pengujian eksperimental dan hasil pengamatan komposisi pada material dimasukkan kedalam software SolidWorks dan selanjutnya melakukan simulasi untuk mendapatkan/mengetahui besarnya nilai kekuatan dari material. Sebelum dilakukan simulasi setiap geometri spesimen dibedakan/divariasikan berdasarkan panjang mesh. Variasi mesh 2, 4, 6, 8 dan 10. Dari hasil pengujian eksperimen nilai tegangan (stress) yang diperoleh 2.451E+09N/m2. Hasil dari simulasi numerik, nilai tegangan pada material disetiap variasi berbeda – beda, ini menunjukkan bahwa silmulasi berjalan dengan baik. Nilai tegangan yang didapat pada eksperimental tidak begitu jauh besarnya dengan hasil simulasi. Hasil simulasi dengan panjang mesh 2 dan 4 sangat mendekati nilai dari eksperimen. Semakin besar mesh akan mempengaruhi nilai hasil simulasi
Washbasin Design with DFMA Approach for Covid-19 Prevention
Full text linkThe Covid 19 pandemic makes the need for a washbasin in a public place to prevent the spread of the virus. However, in practice the available washbasins are still not standardized and not ergonomic. So that in this study an ergonomic washbasin design was tried using the DFMA (Design for Manufacture and Assembly) method. Because using the DFMA method aims to improve the design. Through this method, it is possible to produce products with a shorter time and the number of components that are more effective in accordance with the function but have better design quality. In this study there were several components that were repaired, combined and removed, but did not change the function and usability of these components. So that this research resulted in a sink design that is modern, multifunctional, easy to use and comfortable
The Hardness and Microstructure of a Mixture of Used Plastic Waste HDPE, PET and Iron Filings
Full text linkPlastik memegang peranan penting dalam kehidupan manusia, karena plastik merupakan salah satu bahan yang sering digunakan dalam kehidupan sehari-hari sebagai tempat makanan, botol minuman, dll. Plastik sering digunakan karena ringan, fleksibel, dan mudah dibentuk. Namun di era sekarang ini, plastik kini menjadi masalah baru karena menyebabkan sampah plastik membutuhkan waktu yang lama untuk terurai. Selain itu, sampah tidak hanya terkait dengan plastik, tetapi logam juga dapat menjadi limbah, seperti debu besi yang dihasilkan selama pemotongan dan pengeboran material besi. Dan solusi yang ditawarkan adalah dengan memanfaatkan seluruh limbah yang ada untuk dijadikan bahan baru berupa campuran plastik dan serbuk besi dengan metode pengepresan menggunakan panas/suhu, jenis plastik yang digunakan dalam penelitian ini adalah high density polyethylene, polyethylene terephthalate dan serbuk besi, kemudian komposisi pada kisaran HDPE 30% 50%, PET 30% 50% dan serbuk besi 10% 20% Made. Hasil persentase tersebut digunakan sebagai pedoman dalam pembuatan sampel, yang kemudian diuji kekerasan dan struktur mikronya. Setelah dilakukan pengujian nilai kekerasan tertinggi yaitu 2,63 Kgf/mm², dan nilai kekerasan terendah adalah 1,93 Kgf/mm², maka pada pengujian struktur mikro menunjukkan material dengan nilai tertinggi dan terendah, terdapat perbedaan udara yang terperangkap dalam material dan densitas dari hasil pengepresan
Cofiring Effect of Using Sawdust on Exhaust Emissions at the Steam Power Plant: Pengaruh Cofiring Menggunakan Sawdust Terhadap Emisi Gas Buang Pada PLTU
No full textAchieving the national energy mix in 2025 requires accelerating capacity development in new and renewable energy.Utilization of new and renewable energy potential aims to achieve the national energy mix target. One of the new renewable energy that has the potential to be developed in Indonesia is Biomass for fuel. One of the efforts to increase the use of biomass is by Cofiring. Biomass can be an effective alternative energy, in order to minimize the use of fossil fuels. The biomass is mixed into the coal bunker. The fuel mixture is flowed into the combustion chamber or furnace. Some of the advantages of doing biomass in PLTU include relatively lower investment and better environmental impact when compared to 100% coal. Cofiring PLTU has an effect on exhaust emissions, in evaluating the impact of exhaust emissions as a benchmark for environmental parameters, cofiring testing is carried out with reference to the Emission Quality Standard (BME).As a result, the effect of cofiring using 5% sawdust still has no significant effect on exhaust emissions at the CEMS (Continuous Emissions Monitoring System) PLTU. It is very possible that the type of coal used is still very influential on emission conditions, considering that the percentage of biomass used is still very small
Aftermarket Wheels Numerical Simulation To Get Maximum Stress and Deformation Values: Simulasi Numerik Velg Aftermarket Untuk Mendapatkan Nilai Tegangan dan Deformasi Maksimum
No full textThe purpose of this research is to get wheels with offset variants of -15, +20, and +35 made of aluminum alloy with a maximum load of 690 kg. Autocad 2018 and Unigraphic NX 8 were used to create all three designs. The load was calculated using the SAE J2530 standard and simulated using the ANSYS Workbench 14.5 application's numerical simulation method. As a result, the car rim is designed with a spoke form that becomes steeper (Concave) as the offset decreases. Methods a) Dynamic Cornering Fatigue Test, b) Dynamic Radial Fatigue Test, and c) Impact test consecutively at offset -15 of a) 62.33 MPa, b) 111.61 MPa, and c) 1.58 mm can be used to obtain numerical simulation results. For offsets of +20 of 70.91 MPa, 75.75 MPa, and 1.6 mm. And a) 90.33 MPa, b) 78.13 MPa, c) 1.61 mm at offset +35
Design of Gasifier with Microwave-Based Technology with Steam and CO2 As Gas Agent To Produce Syngas
Full text linkThis research is motivated by the increasing gas emissions produced by industrial, automotive and household activities which mostly use fossil energy as an energy source. CO2 capture is introduced to the use of gasification technology in an effort to reduce CO2 emissions which are one of the causes of the greenhouse effect. The role of microwave is also introduced as an effort to increase thermal efficiency and increase production and quality of syngas and its role in reducing tar which is known to be high in biomass gasification. The utilization of water vapor is also clearly disclosed and its effect on syngas products, especially hydrogen gas. The role of the parameters that affect the gasification process is analyzed to see which variant has the best role in improving the quality and quantity of syngas. Research development opportunities are presented by looking at research gaps and future prospect
Layer Height, Temperature Nozzle, Infill Geometry and Printing Speed Effect on Accuracy 3D Printing PETG
Full text linkThe manufacturing industry has grown rapidly in the last few decades. 3D printing is one of the technologies of manufacturing, this technology makes products by adding filaments that are stacked systematically to become a finished product. PETG filament is a polymer with the name polyester but with glycol modification. This study aims to determine and understand the effect of the process parameters layer height, nozzle temperature, infill geometry and printing speed. This research method uses the Taguchi method with L16 and various parameters; layer height 0.12mm; 0.16mm; 0.2mm; 0.28mm, infill geometry cross; cubic; tri-hexagonal; triangles, nozzle temperature 220ºC; 230ºC; 240ºC; 250ºC and printing speed 40mm/s; 50mm/s; 60mm/s; 70mm/s. After testing, it can be concluded that the most influential parameters are sequentially; layer height, nozzle temperature, printing speed, and infill geometry with layer height parameters have the dominant influence, nozzle temperature and printing speed parameters have a balanced influence and infill geometry parameters have the least influence
Numerical Analysis of Tensile Strength on Welding Joints Using Solidworks Software: Analisis Numerik Kekuatan Tarik Plat Baja Karbon Rendah Yang Disambung Dengan Pengelasan Menggunakan Software Solidworks
No full textObjektif dari penelitian ini adalah untuk mengamati kekuatan tarik dan distribusi tegangan pada plat baja karbon rendah yang disambung menggunakan pengelasan Menggunakan Software Solidworks ®.Pada studi ini jumlah spesimen yang akan uji berjumlah tiga spesimen.Spesimen uji merupakan lembaran plat baja karbon rendah tebal 1,6 mm yang disambung menggunakan pengelasan dengan jenis SMAW. Sebelum dilakukan proses pembentukan material spesimen terlebih dahulu diuji komposisinya menggunakan Optical Emission Spectroscopy (OES).Geometri spesimen uji pada studi ini merujuk pada standar ASTM E8. Pengujian Tarik specimen dilakukan menggunakan UTM (universal testing machine) dangan spesifikasi hidrolik 5000 kgf.Selanjutnya pemodelan spesimen dibangun dan dimeshing menggunakan software solidworks 2020.Pada penelitian ini jenis elemen yang digunakan adalah elemen segitiga dan dilakukan proses adaptif mesh pada model spesimen. Proses meshing dilakukan dengan beberapa variasi panjang sisi elemen.Hasil pengujian tarik menunjukkan ketiga spesimen memiliki nilai kekuatan tarik yang tidak jauh berbeda pada kisaran ± 46.19 kgf/mm2. Hasil pengujian menunjukkan kerusakan spesimen terjadi pada area yang berdekatan dengan sambungan pengelasan.Hasil simulasi menunjukkan tegangan yang terjadi pada setiap variasi panjang sisi elemen memiliki trend nilai yang menurun, namun penurunan nilai ini tidak signifikan dan cendrung memiliki nilai yang konstant pada rentang 2,45 sampai 2,49 N/m2. Dari hasil simulasi didapat panjang sisi elemen 2 dan 4 memimiliki nilai yang paling mendekati hasil experimen. Hasil ini sesuai dengan kaidah yang berlaku dimana daerah yang disambung dengan pengelasan memiliki ketaguhan yang lebih baik dari area lainnya
The Effect of Variations in Impeller Shape on Discharge and Water Pressure on the Pump Prototype: Pengaruh Variasi Bentuk Impeller Terhadap Debit dan Tekanan Air Pada Prototipe Pompa
No full textA pump is a device used to move fluid or something in the form of liquid by increasing the pressure so that it can flow from one place to another or from a low surface to a high surface. In everyday life, the need for water is very useful, so it requires a pump to be able to take it or drain it. In this thesis research will be tested by making a pump prototype using a dynamo drive, and changing the shape of the impeller blade and the number of immersions to determine the resulting water pressure and the resulting water discharge. So that it can find out which impellers are effective in producing water and can drain water faster