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All Journal JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin AMMA : Jurnal Pengabdian Masyarakat
Putra Andi Kolala
Institut Teknologi Sumatera
Humanities Automotive Engineering Chemistry Education Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Social Sciences

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PERUBAHAN DIAMETER KAWAT TEMBAGA PADA KINERJA ENERGI LISTRIK GENERATOR TURBIN ANGIN Kolala, Putra Andi; Afisna, Lathifa Putri; Syaukani, Muhammad; Syah, Muhammad Aksel; Siregar, Ilham Ramadhan; Anugrah, Galang
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2025): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v6i1.1714

Abstract

Generator merupakan komponen penting dalam sistem tenaga listrik yang mengubah energi mekanik dari putaran turbin menjadi energi listrik. Pada penelitian ini, turbin digerakkan oleh angin yang dihasilkan di salah satu puncak gedung di Institut Teknologi Sumatera. Generator dirancang dengan tiga variasi diameter kawat tembaga dalam lilitannya, yaitu 0,15 mm, 0,75 mm, dan 1 mm, untuk mengevaluasi efisiensi daya listrik yang dihasilkan pada putaran rotor rendah. Hasil eksperimen menunjukkan bahwa kawat tembaga dengan diameter 0,15 mm menghasilkan tegangan tertinggi sebesar 744 V, arus 29,6 A, dan daya 22.022,4 W pada putaran rotor yang tertinggi 1500 RPM . Diameter 0,75 mm menghasilkan tegangan 125 V, arus 4,8 A, dan daya 600 W, sedangkan diameter 1 mm menghasilkan tegangan 92 V, arus 3,4 A, dan daya 312,8 W. Dengan demikian, daya tertinggi dihasilkan oleh kawat berdiameter 0,15 mm, menunjukkan bahwa diameter kawat berpengaruh signifikan terhadap output daya generator turbin angin.
PERBANDINGAN KUALITAS BRIKET CANGKANG KAKAO DAN LIMBAH PLASTIK SELULOSA ASETAT Alfian, Devia Gahana Cindi; Hidayatullah, M Taufik; Muhyi, Abdul; Syaukani, Muhammad; Afisna, Lathifa Putri; Silitonga, Dicky Januarizky; Kolala, Putra Andi
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2025): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v6i1.1948

Abstract

Pemanfaatan limbah biomassa sebagai sumber energi alternatif merupakan solusi potensial dalam mendukung keberlanjutan energi. Penelitian ini bertujuan untuk mengkaji karakteristik briket berbahan dasar kulit kakao yang dipadukan dengan selulosa asetat dalam tiga variasi komposisi (%), yaitu A (95:5), B (93:7), dan C (90:10). Briket diproses menggunakan tekanan sebesar 60 kg/cm² dan dikeringkan pada suhu 100°C selama 4 jam. Pengujian dilakukan untuk menentukan kadar karbon, kadar zat terbang, kadar abu, nilai kalor, serta laju dan durasi pembakaran. Hasil penelitian menunjukkan bahwa kadar karbon tertinggi diperoleh pada variasi A (79,29%), yang mendekati standar SNI 1683-2021 dengan batas minimal 79%. Kadar zat terbang pada semua variasi memenuhi standar, dengan nilai terendah pada variasi A (7,05%), lebih rendah dari batas maksimal SNI, yaitu 10-17%. Namun, kadar abu masih jauh melebihi standar, dengan variasi C memiliki kadar abu tertinggi (20,83%), sedangkan batas maksimal SNI adalah 4%. Dari segi nilai kalor, seluruh variasi belum memenuhi standar SNI yang mensyaratkan minimal 6500 kal/g, dengan nilai tertinggi hanya mencapai 4671,63 kal/g. Laju pembakaran tertinggi terjadi pada variasi C (0,26 g/menit) dengan waktu pembakaran 69 menit, sementara variasi A memiliki laju pembakaran terendah (0,22 g/menit) tetapi dengan durasi terpanjang (81 menit), menunjukkan efisiensi pembakaran yang lebih baik. Secara keseluruhan, briket kulit kakao dengan selulosa asetat memiliki potensi sebagai bahan bakar alternatif, tetapi masih memerlukan optimasi lebih lanjut untuk meningkatkan nilai kalor dan menurunkan kadar abu agar sesuai dengan standar nasional.
Edukasi Laboratorium Teknik Mesin ITERA Bagi Siswa SMKN 1 Raman Utara Dalam Meningkatkan Literasi Teknologi Paundra, Fajar; Muhyi, Abdul; Perdana Nurullah, Fajar; Pujiyulianto, Eko; Gahana Cindi Alfian, Devia; Syaukani, Muhammad; Rajagukguk, Kardo; Januarizky Silitonga, Dicky; Andi Kolala, Putra; Nanda Syanur, Farid; Aditia Prahmana, Rico
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 5 : Juni (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This community service activity aims to introduce the laboratory environment and facilities of the Mechanical Engineering Study Program at Institut Teknologi Sumatera (ITERA) to students of SMKN 1 Raman Utara, East Lampung. The activity was conducted in the form of a campus visit involving 62 12th-grade students from the Light Vehicle Engineering Department. The agenda included a presentation on higher education opportunities, interactive discussions, a Q&A session, and a direct tour of ITERA’s Mechanical Engineering laboratories, including the Materials Engineering, Energy Conversion, Fabrication, Manufacturing, Internal Combustion Engines, and Foundry laboratories. This activity was designed to inspire students to pursue higher education and broaden their understanding of engineering fields. The outcome showed a high level of enthusiasm among the students and successfully achieved the goal of introducing campus life and technological exposure. This initiative is expected to serve as an initial step in strengthening synergy between vocational high schools and higher education institutions.
A COMPARISON OF HYDROGEN PRODUCTION BY ELECTROLYSIS METHOD USING WATER ELECTROLYTE WITH STAINLESS STEEL AND COPPER ELECTRODES Afisna, Lathifa Putri; Kolala, Putra Andi; Meha, Gabriel; Pasaribu, Frans Winner; Sindhu, I Gede Pande Naraya
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 1 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i1.73126

Abstract

This experiment focuses on the production of hydrogen gas (H2) using the electrolysis method. The electrolysis method converts water (H2O) into the combustible compound H2 and O2, which aids in the combustion process. Hydrogen gas (H2) is an important renewable energy source. Therefore, research is needed to explore and optimize alternative and renewable energy sources, one of which is hydrogen gas. The objective of this experiment was to find the optimal variation between stainless steel and copper in producing the highest hydrogen gas pressure. In this experiment, a power source of 12 V 20 A was used, along with a salt solution of 1500 mL with a concentration of 0.167 gr/mL. Two different types of cathodes were used, stainless steel and copper. The experiment involved variations in the number of plates, namely 3, 5, and 7, and testing durations of 5, 10, and 15 minutes. The test results indicated that the hydrogen gas pressure increased with the increasing number of plates and electrolysis time. The highest pressure was achieved using copper plates with 7 plates and an electrolysis time of 15 minutes. Under these conditions, the hydrogen gas pressure reached 439.677 Pa 
Experimental Study Of Wear Testing Of ASTM 440C Steel On A Ball-On-Disc Tribometer Using Variations Of Lubricants Sitorus, Jhonatan Jufrianto; Silitonga, Dicky Januarizky; Kolala, Putra Andi; Afisna, Lathifa Putri; Alfian, Devia Gahana Cindi
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 4 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i4.896

Abstract

Bearings are important components in industry that function to reduce friction between moving parts for smoother and more efficient movement. However, friction that occurs can cause wear on the bearing surface. This study aims to analyze the wear volume, wear width, and wear rate of ASTM 440C steel material with variations of SAE 10W-30, SAE 10W-40, and SAE 140 lubricants at rotational speeds of 180 rpm, 270 rpm, and 310 rpm. Testing was carried out using a tribometer. ball-on-disc with a constant time of 10 minutes. The test results showed that the lowest wear width was obtained in SAE 10W-40 lubricant of 259.806 µm at 180 rpm, while the highest value of 417.894 µm also occurred in SAE 10W-40 at 270 rpm. The lowest wear volume was recorded in SAE 10W-40 of 0.0225 mm³ at 180 rpm, while the highest was 0.0942 mm³ at 270 rpm with the same lubricant. For the wear rate, the lowest value of 0.50 × 10⁻⁸ g/mm²·s was found in SAE 140 lubricant at 180 rpm, while the highest was 1.58 × 10⁻⁸ g/mm²·s occurred in SAE 10W-40 at 270 rpm. Overall, SAE 10W-40 lubricants are more suitable for use at low revs, while SAE 140 lubricants are recommended for high revs due to their greater viscosity and resistance to wear.
Co-Authors Aditia Prahmana, Rico Anugrah, Galang Devia Gahana Cindi Alfian Dicky J. Silitonga Gahana Cindi Alfian, Devia Hidayatullah, M Taufik Kardo Rajagukguk, Kardo Lathifa Putri Afisna Meha, Gabriel Muhammad Syaukani Muhyi, Abdul Nanda Syanur, Farid Pasaribu, Frans Winner Paundra, Fajar Perdana Nurullah, Fajar Pujiyulianto, Eko Sindhu, I Gede Pande Naraya Siregar, Ilham Ramadhan Sitorus, Jhonatan Jufrianto Syah, Muhammad Aksel