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Machine : Jurnal Teknik Mesin
Published by Universitas Bangka Belitung
ISSN : 25022040     EISSN : 25810138     DOI : -
Core Subject : Engineering,
Automotive Engineering Mechanical Engineering
Arjuna Subject : -
Articles 180 Documents
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ANALISIS PENGARUH PENGGUNAAN BAHAN BAKAR ALKOHOL TERHADAP PELEPASAN PANAS DAN KINERJA MESIN PEMBAKARAN Wirawan, Tri Susilo
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5599

Abstract

Gasoline engines are crucial, especially in the transportation sector, and currently rely on fossil-based gasoline, which is expected to deplete. To meet domestic energy needs, the country must import gasoline. Therefore, there is a need for renewable energy sources that do not require major modifications to the engine. Methanol, a renewable alcohol fuel derived from plant materials, was tested in a 20% blend with gasoline in a TV-1 engine with a power output of 4.50 kW, a single cylinder, four-stroke configuration, and a cylinder volume of 661.45 cc. The research results indicate that the engine performance with the methanol blend is better in terms of cylinder pressure and heat release. The largest difference in cylinder pressure is 1.91 bar, while the largest difference in heat release is 1.64 J/°C. However, the specific fuel consumption for the methanol blend is higher compared to pure gasoline, with an average specific fuel consumption for the methanol-blended gasoline being 8.7% higher than that of pure gasoline.
UJI KARAKTERISTIK PELET REFUSE DERIVED FUEL (RDF) HASIL PROSES PENGOLAHAN SAMPAH MENGGUNAKAN PELLETIZER DEWI, RANY PUSPITA
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5606

Abstract

Municipal solid waste can be processed into solid fuel in the form of Refuse Derived Fuel (RDF) pellets and used as a fuel substitute. One of them is through the Waste Processing Technology at the Source (TOSS) method. Solid waste generally has a low ash content ranging from 20-40%. RDF is combustible waste or rubbish that goes through a crushing and filtering process by turning it into solid fuel. RDF pellets can be made by pressing using a pellet machine or pelletizer. The aim of this research is to test the characterization of pelletizer performance in processing urban waste into RDF pellets. The characterization tested includes analysis of bound carbon content, volatile content and ash content. The research was carried out by varying the composition of organic waste and inorganic waste, namely 1 sample A (70% organic components + 30% inorganic components), sample B (60% organic components + 40% inorganic components), sample C (50% organic components + 50% inorganic components, sample D (40% organic components + 60% inorganic components), and sample E (30% organic components + 70% inorganic components). The lowest volatile was produced in sample E with a value of 52.8445%, and the lowest ash content was produced in sample A with a value of 4.5466%.
PRESTASI POMPA SENTRIFUGAL TIPE OVERHUNG UNTUK APLIKASI INDUSTRI DENGAN METODE REVERSE ENGINEERING DAN CFD Yamin, Mohamad; Irawan, Rudi; Mahandari, Cokorda Prapti; Ariandi, Rian Dwi; Firmansyah, Riyan; Alfasha, Muhammad Zidan; Suharto, Suharto
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5623

Abstract

Indonesia faces various challenges in achieving net zero emissions, energy crises, and urgent agricultural irrigation needs. In this context, centrifugal pumps play a crucial role in various industrial applications and irrigation systems. However, performance curve data for pumps is often unavailable, particularly for older pumps or those with lost documentation. This study aims to develop new performance curves for centrifugal pumps using Reverse Engineering (RE) based on 3D scanning and Computational Fluid Dynamics (CFD) simulation. The process begins with geometric modeling of the pump using 3D scanning to obtain accurate data regarding the pump’s physical shape. The model is then used in CFD simulations with the k-epsilon (k-ε) turbulence model and SIMPLE method to analyze flow characteristics and pump performance. Simulation results show that the deviation in efficiency and power compared to existing experimental data is below 2%, with a mesh size of 0.00005 mm providing optimal results in terms of accuracy and computational efficiency. This research demonstrates that developing performance curves using RE and CFD methods can address issues of missing data and provide a solid foundation for design improvements and efficient operation of centrifugal pumps. The findings have the potential to enhance operational efficiency of pump systems and support environmental impact mitigation efforts through pump technology optimization.
PERANCANGAN SAMBUNGAN BAUT RANGKA VERTIKAL PADA MESIN CNC MILLING MINI Pramudi, Ganjar; Hafidz, Umar; Santoso, Alga Aji
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5736

Abstract

Printed Circuit Board (PCB) adalah sebuah medium berbentuk papan yang dilapisi tembaga yang berfungsi untuk menghubungkan dan menyalurkan listrik antar komponen elektronik. Pembuatan jalur PCB dengan kualitas bagus maka perlu penggunaan Mesin CNC Milling Mini agar memudahkan pembuatan jalur PCB yang teliti dan presisi. Mesin CNC Milling Mini merupakan pengembangan dari mesin milling konvensional, yang terdiri dari 3 sumbu axis yaitu X axis, Y axis, dan Z axis yang dapat digunakan untuk membuat jalur PCB. Mesin CNC Milling Mini berukuran 620 mm x 600 mm dan memiliki beberapa komponen antara lain frame, stepper motor, poros, leadscrew, bearing, spindle motor, chuck, endmill, kopling, kotak kontroler, bed. Pada sambungan mesin menjadi komponen penting dalam perancangan mesin yang perlu diperhatikan. Dengan adanya sambungan yang tepat, maka pada perakitan Mesin CNC Milling Mini dapat menjadi kesatuan yang utuh, kuat dan presisi dalam penggunaannya. Perancangan Mesin CNC Milling Mini memerlukan sambungan baut untuk menggabungkan komponen mesin. Sambungan baut berperan penting dalam penerus beban antara rangka vertikal dengan komponen mesin. Pada komponen mesin untuk dipasang di rangka vertikal menggunakan ukuran baut M5 diameter 5 mm dengan kekuatan baut sudah dikatakan aman karena gaya yang bekerja 5.145 N kurang dari beban tarik baut 10.104,3 N.
ANALISA EFISIENSI ISENTROPIK PADA ASH REMOVAL COMPRESSOR DENGAN SOFTWARE COMPUTER AIDED THERMODYNAMICS TABLE 3 Ramadhan, Muhammad Nizar; Roby, Muhammad
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5748

Abstract

Steam Power Plant (PLTU) is a plant that relies on kinetic energy from steam to produce electrical energy. One of the components used to run the system in PLTU is an air compressor. In Pulang Pisau Steam Steam Power Plant, Air Screw Compressor is used to meet the needs of compressed air in air instruments and ash removal. This study aims to analyze the isentropic efficiency of ash removal screw compressors 2 and 3 at Pulang Pisau Steam Power Plant by comparing the isentropic value of factory specifications with the isentropic value of actual conditions using Computer Aided Thermodynamics Table 3 (CATT3) software. The method carried out in this study is divided into two, namely taking actual data in the field and calculating data using CATT3 software. The results showed that the average isentropic efficiency value of ash removal compressor 2 is 84% and ash removal compressor 3 is 83% with a range of values of 77% - 89%. From these results, it can be concluded that ash removal compressors 2 and 3 at the Pulang Pisau Steam Power Plant are still working properly.
PENGARUH VARIASI FRAKSI PENGUAT DAN SUHU SINTERING AMC TERHADAP NILAI DENSITAS DAN KEKERASAN DENGAN SiO2/RHA/BA wiryono, sukanto -
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5871

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi fraksi penguat dan suhu sintering terhadap nilai densitas dan kekerasan komposit bermatriks aluminium yang diperkuat dengan pasir silika, baggase ash, dan rice husk ash. Serbuk aluminium daur ulang digunakan sebagai matriks dengan komposisi fraksi penguat sebesar 6%, 8%, dan 10%. Proses pembuatan komposit meliputi pencampuran serbuk menggunakan metode mechanical alloying, dilanjutkan dengan proses kompaksi panas pada suhu sintering 530°C, 550°C, dan 570°C. Pengujian densitas dilakukan berdasarkan standar ASTM B962-17, sedangkan kekerasan diuji menggunakan standar ASTM E110-14. Hasil penelitian menunjukkan bahwa peningkatan fraksi penguat dan suhu sintering berpengaruh signifikan terhadap nilai densitas dan kekerasan. Nilai densitas tertinggi sebesar 2,387 g/cm³ dan kekerasan tertinggi sebesar 45,9 HB dicapai pada fraksi penguat 10% dengan suhu sintering 570°C.
RANCANG BANGUN PENDINGIN OTOMATIS PADA SAMBUNGAN PLAT BAJA GULUNGAN (HOT ROLL COIL) PASCA PENGELASAN Mubarak, Abdul Haris
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.6227

Abstract

This research aims to create an automatic cooling device for rolled steel joints (Hot Roll Coil) produced by a nickel processing factory operating in the Morowali Industrial Area. Steel plates in the form of long rolls that are rolled are first welded to connect the steel plates to produce rolls of steel plate that are ready to be marketed. Joining steel using this welding method makes the steel plate hot with a temperature in the range of 100°C-200°C. The temperature of the steel plate after welding must be immediately lowered before rolling, because otherwise the steel joints will come apart and could hamper the production process because the broken plate will have to repeat the welding process from the beginning. The plate temperature required to enter the rolling process is 40°C - 60°C. This research has produced a tool to cool steel joints by automatically spraying the steel joints and succeeded in reducing the plate temperature from 100℃ - 200℃ to a constant temperature of 40℃ - 50℃ according to the required temperature.
ANALISA KARAKTERISASI KOMPOSISI CAMPURAN TANAH LIAT, ALUMINA, KANJI SEBAGAI ALTERNATIF BAHAN ISOLATOR Suluh, Sallolo
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.6240

Abstract

Abstract The use of clay is mostly used to make various crafts such as flower vases, jugs and also made into pottery, bricks and roof tiles. The purpose of this study is to determine the effect of the composition of the mixture of clay, alumina and starch on the porosity, density and water content of the heat insulator cylinder. The research method used is an experimental method by making material from a mixture of clay, alumina, starch as an alternative insulator material. A series of processes are carried out in making the material. Furthermore, after the material has been successfully formed, tests are carried out on the water content, porosity, and density of the material. The results showed that the best mixture of clay, alumina and starch was obtained in sample E with a composition of 20% clay, 60% alumina, and 20% starch. The water content, porosity, and density of the mixture were 9.49%; 26.97%; and 1,514.80 kg/m^3 Key words : alumina, insulator, composition, porosity, and starch
THE ANALYSIS OF ELVIRA EV-1 CHASSIS MECHANICAL PERFORMANCE WITH VARIOUS BEAM CROSS-SECTION Wijianti, Eka Sari; Sarwono, Agus; Ariksa, Jeri; Saparin, Saparin; Adib, Adam Zuyyinal
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.6413

Abstract

Elvira EV-1, as an electric vehicle (EVs) has become one of the latest developments that contributes to achieving sustainable and reliable transportation. These EVs were built to serve as a relevant solution for campus operational mobility. However, at the core of its framework system, Elvira EV-1 still uses a ladder-type chassis, which is inferior to other types of chassis in terms of torsional rigidity. Therefore, to enhance its mechanical performance, this study determined the best option of beam cross-section for the Elvira EV-1 chassis. There were three types of the selected beam section, namely rectangular, I-beam, and C-channel. The mechanical performance of each type of chassis was examined using the Frame Analysis module provided by Autodesk Inventor. The results show that the rectangular chassis experienced the highest bending stress of the other types of chassis due to its low moment of inertia, which is almost 26.27% higher. Nonetheless, with the same setup, the shear stress that occurred at the C-channel type of chassis was greater than its material. The chassis would fail under the load subjected to it. Similarly, I-beam chassis has the maximum torsional stress greater than the yield strength of the material due to low torsional rigidity. In addition, the mass of the chassis with rectangular section provided a more lightweight structure, about 36,92% lower than the other type of chassis. According to these findings, it can be concluded that the chassis with a rectangular section has promising performance to be an option as the Elvira EV-1 chassis.
Yupi PENGARUH VARIASI TEMPERATUR DAN KATALIS ZEOLIT TERHADAP KARAKTERISTIK BIO-OIL DARI PIROLISIS LIMBAH LDPE, BAN, BAMBU Majedi, Farid; Eka Indriana, Yupi; Puspitasari, Indah
Machine : Jurnal Teknik Mesin Vol 11 No 2 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/r9dz6810

Abstract

The problem of dwindling fossil fuels, waste in Winongo landfill, Madiun which is over capacity. An alternative energy (renewable) is needed, which can be produced from waste as an alternative fuel to replace fossil fuels, one of which is pyrolysis. Pyrolysis is the process of thermochemical decomposition of organic materials through heating without or little oxygen to produce gaseous, liquid (tar), and charcoal products. Natural zeolite is used as a catalyst in the pyrolysis process to convert short hydrocarbon chains into longer hydrocarbon chains. The pyrolysis process uses a pyrolysis device with a rotary kiln model with electric heater heating. This research process uses a total raw material weighing 500 grams including 50% LDPE plastic waste, 25% used tires, and 25% used bamboo with the variables used in this study are temperature variations of 250°C, 300°C, 400°C, 500°C, and 600°C and the addition of 2 natural zeolite catalyst baffles weighing 83.3 grams in each baffle, with a process of 3 hours. Bio-oil volume data was taken every 3 minutes, density and calorific value were studied when the pyrolysis process was complete. The test results showed the highest volume of bio-oil (tar) at 400°C was 261 ml, the lowest density at 600°C was 0.798 g/ml, and the highest calorific value at 500°C was 54,233 Cal/gr.

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