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Sifat Listrik komposit yang difabrikasi dari carbon-phenol formaldehyde Pramono, Agus Edy; Patrick, Yohannes PatrickR; Belyamin; Indayaningsih, Nanik Indayaningsih
Recent in Engineering Science and Technology Vol. 1 No. 04 (2023): RiESTech Volume 01 No. 04 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i04.29

This research aimed to create composites of carbon-phenol formaldehyde (PF) using carbonated rice husks as fillers. The composites showed electrical conductivity that increased with carbon content and decreased electrical resistance. The composites were evaluated for their physical, and electrical properties. The results showed that increasing PF content resulted in higher density but lower porosity, making the composites heavier. Specimens with 80% carbon weight and 20% PF weight produce an electrical conductivity of 0.055 [S/cm], while those with 70% carbon weight and 30% PF weight produce an electrical conductivity of 0.039 [S/cm]. Specimens with 60% carbon weight and 40% PF weight generate an electrical conductivity of 0.013 [S/cm].

DESIGN & IMPLEMENTATION OF MPPT SOLAR PHOTOVOLTAIC - ELECTRIC VEHICLES IN FAST VARYING PARTIAL SHADING CONDITIONS USING SERVAL OPTIMIZATION ALGORITHM Saputra, Hendry; Isdawimah; Belyamin
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.49-62

Solar panels are used to convert solar energy into electrical energy. In this study it was applied to electric vehicles which have a very large potential for being constrained by shadows. In fast varying partial shading conditions, the position of the maximum power point is divided into two, namely GMPP and LMPP. This condition makes the MPPT process stuck in LMPP. Therefore, this research proposes the application of Serval Optimization Algorithm (SOA) in MPPT. This method refers to the natural behavior of the serval in nature. The fundamental inspiration of SOA is the serval hunting strategy in two stages of exploration and exploitation. The SOA is implemented in MPPT to change (duty cycle) so that it gets the best value and produces maximum solar panel output power. This SOA method was chosen to complete the partial shading conditions so that MPPT can optimally reach GMPP without going through LMPP. The solar panels used in this system are 2 units with specifications of 25 Wp with a 24V battery load and a 120W BLDC Motor compact in Electric Vehicle - Two Wheeler Scooter. MPPT SOA was tested in a simulation using PSIM and actual Software in 6 variations of normal and partial shading conditions. In the Simulation Test of Partial Shading Conditions, an average accuracy of 99.958% and an average tracking time of 0.492 seconds were obtained. SOA has a higher accuracy than PSO and GWO, which is 99.95%. And it has a faster tracking time of 0.55 seconds. In the SOC Integration Test, the SOA Method obtained an error value of 6.48% better than the GWO Method. On the Road Test with 6 condition, it can slow down the value of the decrease in battery capacity by 16.24%. The application of Single Source on the PV-MPPT-Converter can be implemented with an efficiency value of 76.86%. In previous research where SOA is a new method in Optimizing Problem Solving which has quite good accuracy performance, and in this research it can be implemented in Solar PV Optimization to track MPPT electric vehicles with varied and fluctuating partial shading conditions.

Improved of Process Production Disc Car Whell Type PSD3K (City Car Type) Hasan, Herry Patria; Susanto, Iwan; Belyamin; Kamal, Dianta Mustofa; Ing-Song Yu
Recent in Engineering Science and Technology Vol. 2 No. 04 (2024): RiESTech Volume 02 No. 04 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i04.71

This research accelerates the production process with the aim of increasing productivity from Manufacturers engaged in the manufacture of automotive parts currently experiencing an increase in sales orders on the other hand facing problems in productivity due to cracked side dies in rim production to 1400 pcs. The cracking of the side die is due to thermal shock that occurs to accelerate the production process, as a result of which cracks occur in the side die. With the concept of conducting research in the field of direct production then analyzing the characteristics of mold materials, die characteristics, process characteristics, characteristics of finished products before and after changes by testing the results of the laboratory of measuring instruments and conducting trials of variations in machine setting parameters, variations in the production process and products produced. The experiment involved changing the standard temperature from 520 °C–545 °C to 532 °C–538 °C and reducing the immersion time from a minimum of 270–540 seconds to 332 seconds. It reduces the soaking time from 69 seconds to 46 seconds and the aging time from 190 seconds to 180 seconds, increasing the casting productivity from 194,870 Pcs/28 days to 213,311 Pcs/28 days from seven machines, thus meeting the customer's requirement of 200,000 Pcs/28 days without cracking side die. Durability testing on five product samples in accordance with TSD5605G standards confirms that the quality meets customer specifications. The results of this study prove that SKD6 matrial is much stronger than FCD550 against thermal shock. Keywords: thermal shock, die disc car wheel, manufacturing, automotive parts, casting productivity

Penambahan Zat Aditif Komersil Sebagai Upaya Mengatasi Pembentukan Deposit Pada Bahan Bakar B30 di Lingkungan Temperatur Rendah Sonki Prasetya1,2* ,Belyamin 1,2, dan Handri Tirta Lianda1 Tirta Lianda, Handri; Belyamin; Prasetya, Sonki
Jurnal Mekanik Terapan Vol 4 No 3 (2023): Desember 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v4i3.5960

Pada PLTP-X sering mengalami permasalahan sering trip/manual shut down pada diesel engine yang mensuplai energi listrik untuk penerangan operasional dan pompa incjetion ke sumur. Permasalahan tersebut di akibatkan oleh tersumbatnya sistem penyaring bahan bakar B30, karena terbentuknya gelling/deposit pada kondisi malam hari pada suhu rendah 14-17°C di site PLTP-X. B30 di pakai karena,di wajibkan oleh Peraturan Menteri Energi dan Sumber Daya Mineral (ESDM) tahun 2020 tentang Penyediaan, Pemanfaatan dan Tata Niaga Bahan Bakar Nabati (Biofuel) sebagai Bahan Bakar Lain. Untuk itu diperlukan cara mengurangi pembentukan gelling/deposit agar permasalahan penyumbatan penyaring bahan bakar dapat di tanggulangi serta bahan bakar B30 dapat di pakai pada suhu rendah 14-17°C di site PLTP-X. Metode penelitan yang akan di pakai adalah dengan cara eskperimental yaitu memvariasikan penambahan zat aditif komersil pada bahan bakar B30 0%;,1,6%;,3,3%;, dan 5%. Hasilnya menunjukkan dengan penambahan aditif komersil dapat mengurangi pembentukan deposit bahan bakar B30 pada suhu rendah 14-17°C dengan menurunkan nilai propertis densitas dari 880 kg/m3 menjadi 878 kg/m3, viskositas 8,8 mm2/s menjadi 5,3 mm2/s, menaikkan titik tuang awal dari 18°C menjadi 15°C dan nilai kalori 10198 cal/kg menjadi 10644 cal/kg.

Acceleration of Production Process by Ergonomic Design Hasan, Herry Patria; Belyamin; Iwan Susanto; M Sjahrul Annas
Jurnal Teknologika Vol 14 No 2 (2024): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v14i2.288

PT. XYZ experienced load imbalance with the production capacity of the D17D product line in the molded production area, The existence of gaps 70 seconds between the standard SOP time of 360 seconds and the actual process time of 430 seconds. This difference occurs due to each process being unbalanced, the results of the process are not the same. With the concept of conducting research in the field of direct production then analyzing the rubberistics of the production process, it is hoped that the problems that occur can be found solutions to eliminate young time (in vain). From the results of this study proves that designing Jig & fixture as a tool to reduce the imbalance of each process where in the Unloading pressing rubber process there is an ergonomic influence that causes the operator to experience MSDs so that production results do not reach the target. As a result, after designing a tool to help the unloading process of the D17D product rubber press machine in the molded area, there was an acceleration of the process where the SOP time was 360 seconds before repairs was carried out 430 seconds after repair to 340 seconds

The Analysis of the Effect of RIB Width and Channel Depth Design Modifications on CFD-Based Parallel Type Bipolar Plates for the Application of Proton Exchange Membrane Fuel Cell Stack Singles Mochammad Tendi Noer Ramadhan; Amar Banu Mukhlisin; Belyamin; Radhi Maldzi; Abdul Azis Abdillah
Recent in Engineering Science and Technology Vol. 3 No. 02 (2025): RiESTech Volume 3 No. 02 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i2.107

The use of large amounts of fossil fuels can pollute the air with significant amounts of carbon monoxide. Proton Exchange Membrane Fuel Cell (PEMFC) is an attractive alternative because it is able to generate high current with low working temperature, fast start-up time, no pollution, and good durability. In PEMFC systems, bipolar plates are one of the main and important components. This component facilitates the reactants to flow through the designed channel. This study aims to modify the parallel-type flow field design on the bipolar plate using CFD simulation in ANSYS, in order to improve the performance of PEMFC. While flowing through the bipolar plate, the reactants diffuse through the gas diffusion layer, thus connecting with the catalyst layer to generate protons and electrons in the anode and water and heat in the cathode through chemical reactions. The results of the study show that the variation of rib width and channel depth has a significant effect on the pressure distribution and hydrogen flow distribution.These findings can contribute to the improvement of flow distribution efficiency and pressure reduction

The Influence of Anodizing Electrolyte Concentration on Ni-P Deposition on Anodic Aluminum Oxide (AAO) Rizkia, Vika; Susanto, Iwan; Belyamin; Garjati, Vina Nanda; Hapsari, Ade Utami; Raharjo, Jarot; Damisih; Pravitasari, Retna Deca
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.9708

Aluminum alloys suffer from deficiencies in surface performance due to insufficient resistance to corrosion and mechanical qualities in harsh environments. Therefore, it is crucial to apply a protective surface modification during the manufacturing process of the aluminum component. The electroless deposited Ni-P shows great potential as a protective coating due to its simple manufacturing process and outstanding performance. This study investigates the effect of oxalic acid concentration in the anodizing process on electroless Ni-P coating. In this study, Anodic Aluminum Oxide (AAO) is formed by an anodizing process on 0.3,0.5, and 0.7 oxalic acids prior to Ni-P electroless deposition. The resulting Ni-P layer has a nodular-like morphology with a size in the order of 0.5 m or less. Moreover, the AAO surface is covered by a thin and tightly formed layer of nickel particles. The EDX analysis shows the oxygen percentage falls by up to 70% after Ni deposition in all anodizing parameters, as compared to the anodized specimens alone. In addition, the nickel content gradually decreases as the concentration of oxalic acid increases from 0.3 M to 0.7 M.

DESIGN & IMPLEMENTATION OF MPPT SOLAR PHOTOVOLTAIC - ELECTRIC VEHICLES IN FAST VARYING PARTIAL SHADING CONDITIONS USING SERVAL OPTIMIZATION ALGORITHM Saputra, Hendry; Isdawimah; Belyamin
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.49-62

Solar panels are used to convert solar energy into electrical energy. In this study it was applied to electric vehicles which have a very large potential for being constrained by shadows. In fast varying partial shading conditions, the position of the maximum power point is divided into two, namely GMPP and LMPP. This condition makes the MPPT process stuck in LMPP. Therefore, this research proposes the application of Serval Optimization Algorithm (SOA) in MPPT. This method refers to the natural behavior of the serval in nature. The fundamental inspiration of SOA is the serval hunting strategy in two stages of exploration and exploitation. The SOA is implemented in MPPT to change (duty cycle) so that it gets the best value and produces maximum solar panel output power. This SOA method was chosen to complete the partial shading conditions so that MPPT can optimally reach GMPP without going through LMPP. The solar panels used in this system are 2 units with specifications of 25 Wp with a 24V battery load and a 120W BLDC Motor compact in Electric Vehicle - Two Wheeler Scooter. MPPT SOA was tested in a simulation using PSIM and actual Software in 6 variations of normal and partial shading conditions. In the Simulation Test of Partial Shading Conditions, an average accuracy of 99.958% and an average tracking time of 0.492 seconds were obtained. SOA has a higher accuracy than PSO and GWO, which is 99.95%. And it has a faster tracking time of 0.55 seconds. In the SOC Integration Test, the SOA Method obtained an error value of 6.48% better than the GWO Method. On the Road Test with 6 condition, it can slow down the value of the decrease in battery capacity by 16.24%. The application of Single Source on the PV-MPPT-Converter can be implemented with an efficiency value of 76.86%. In previous research where SOA is a new method in Optimizing Problem Solving which has quite good accuracy performance, and in this research it can be implemented in Solar PV Optimization to track MPPT electric vehicles with varied and fluctuating partial shading conditions.

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