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All Journal Jurnal Teknologi Indonesian Journal of Community Services ARUS JURNAL SAINS DAN TEKNOLOGI
Samhuddin
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Medicine & Pharmacology Social Sciences Other

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Pengenalan Aplikasi Pengecoran Logam Berbahan Dasar Sampah Kemasan Kaleng Untuk Pembuatan Produk Wajan Bagi Masyarakat Kota Kendari Sudia, Budiman; Aminur; Sisworo, Raden Rinova; Balaka, Ridway; Yurnidarsyah, Citra; Sudarsono; Samhuddin; La Hasanudin
Indonesian Journal of Community Services Vol. 1 No. 1 (2022): May
Publisher : CV. Literasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47540/ijcs.v1i1.534

Abstract

One of the classic problems that are difficult to overcome in urban life is environmental problems where waste is not handled properly, especially inorganic waste. Currently, the largest contributor to waste after organic waste is inorganic waste in the form of canned waste. The use of aluminum as a packaging material is due to its being lightweight, easy to shape, and does not endanger human health. On that basis, its use as packaging is widespread which also triggers the forerunner of the waste problem in people's lives. Aluminum waste will be a source of income for the community if it is handled properly by involving waste processing technology in the form of recycling technology through metal smelting or casting. This service program aims to introduce metal casting applications made from canned waste into frying pan products for the community in Lepo-Lepo, Kendari City. The activity stages include: socializing the introduction of aluminum-based cans of packaging waste and the practice of smelting aluminum cans in a crucible furnace and pouring molten metal into molds. The implementation of this service activity can raise awareness of participants to be able to process waste, especially aluminum can packaging into frying pan products, and create new jobs to improve the welfare of the local community.
Pengujian Kekerasan dan Struktur Mikro Hasil Pengecoran Aluminium pada Berbagai Media Pendingin Kadir, Abd.; Samhuddin; Risman, Riski; Jiri, La
Arus Jurnal Sains dan Teknologi Vol 3 No 1: April (2025)
Publisher : Arden Jaya Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57250/ajst.v3i1.1583

Abstract

Perkembangan industri di Indonesia semakin besar, salah satunya industri bahan material. Material yang dicari berdasarkan segi kekerasan, kekuatan, kepadatan, dan ringan. Penelitian ini bertujuan untuk mengetahui pengaruh variasi media pendingin air, air garam, oli, dan udara terhadap nilai kekerasan vickers, dan struktur mikro. Aluminium merupakan bahan logam yang mempunyai sifat ringan, tahan korosi, penghantar listrik yang baik. Pada penelitian ini menggunakan metode pengecoran casting dengan suhu 700°C. Dari hasil penelitian ini menunjukan pengaruh variasi media pendingin terhadap nilai kekerasan vickers dengan nilai tertinggi ditunjukkan pada media pendingin air yaitu sebesar 524,802 Kg/mm2, dan nilai kekerasan vickers terendah ditunjukkan pada media pendingin udara yaitu sebesar 349,882 Kg/mm2. Sementara berdasarkan pengujian struktur mikro unsur Si lebih merata dan halus pada media pendingin air sehingga kekerasan tertinggi diperoleh pada media pendingin air dikarenakan unsur Si mempunyai kekerasan yang lebih tinggi disbanding Al.
A Comprehensive Computational Fluid Dynamics (CFD) Analysis of the Effect of Blade Number on the Performance and Rotational Characteristics of Hydrokinetic Turbines Rachman , Aditya; Samhuddin; Kadir, Abdul; Ramadhan, Anwar Ilmar; Firmansyah
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.131-148

Abstract

The number of blades in hydrokinetic power systems is a fundamental aspect of their design. This number affects not only the investment and mechanical loads but also the performance and rotational characteristics. The relationship between the number, performance, and rotational aspects is complex, however there are currently insufficient explanations for this connection. This study examines the complex interaction between them using a steady Computational Fluid Dynamics (CFD) method based on Reynolds-Averaged Navier-Stokes (RANS) simulation. The results suggest that turbines with a higher number of blades are more effective than those with a smaller number in regions where the Tip Speed Ratio (TSR) is less than 3. Above this range, turbines with lower blade numbers perform more effectively than ones with higher numbers. The study indicates that increasing the surface area of the turbine blades can efficiently boost the torque generated at low TSR levels, leading to high-performance turbines with a higher blade number. However, when the turbine's TSR is high, an intricate flow phenomenon takes place. This phenomenon is caused by the excessive number of blades, which generates a blockage effect that changes the direction and strength of the flow over the blade. As a result, the lift decreases. This work provides novel insights into the mechanism that governs the performance and rotational properties of turbines with varying numbers of blades. Engineers can derive advantages from comprehending the effect of blade number when choosing the generator and the transmission of hydrokinetic power systems.
Co-Authors Abd. Kadir Abdul Kadir Aminur Anwar Ilmar Ramadhan Budiman Sudia, Budiman Firmansyah Jiri, La La Hasanudin Rachman , Aditya Raden Rinova Sisworo Ridway Balaka, Ridway Risman, Riski Sudarsono Yurnidarsyah, Citra