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All Journal Jurnal Rekayasa Mesin Jurnal Alat Berat
Oktavitasari, Dini
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Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Studi Eksperimen Pengaruh Jumlah Sudu Terhadap Kinerja Wind Turbine Crossflow Fahrudin, Fahrudin; Wahyuni, Fitri; Oktavitasari, Dini
Jurnal Rekayasa Mesin Vol 16, No 2 (2021): Volume 16, Nomor 2, Agustus 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i2.2555

Abstract

Wind is an alternative energy that is environmentally friendly and sustainable. Therefore, we need a type of wind turbine that can receive wind from all directions. The crossflow type vertical axis wind turbine has a high torque coefficient at a low tip speed ratio. The purpose of this study was to determine the effect of the number of blades on the performance of the vertical axis crossflow wind turbine. The experimental test was carried out by varying the number of blades. The configuration is analyzed using the experimental wind tunnel test scheme which has been modified in the section test section. The results showed that the number of blades 16 has a power coefficient ( ) = 0.23 tip speed ratio (TSR) = 0.42 at a wind speed of 4 m / s.
Analisis Troubleshooting External Leak Pada Komponen Differential Komatsu HD785-7 (Studi Kasus: PT BUMA BRC) Kurniawan, Yudi; Abrar, Ali; Mulyanto, Subur; Suryadi, Rian; Nugroho, Agung Dwi; Oktavitasari, Dini; Musrinah, Musrinah
JURNAL ALAT BERAT Vol 3 No 1 (2026): Januari 2026
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v3i1.45

Abstract

Penelitian ini berjudul “Analisis External Leak pada komponen Differential HD785-7 di PT BUMA (BRC)”, yang bertujuan untuk mengetahui penyebab terjadinya external leak pada komponen differential Komatsu HD785-7 dan mengetahui tindakan yang tepat untuk mencegah terjadinya external leak. Metode analisis yang digunakan meliputi analisis visual, analisis trend, dimension inspection, dan perbandingan dengan standard pabrik. Berdasarkan hasil analisis trend, terjadi 14 kali kejadian kebocoran eksternal pada differential diseluruh job site PT BUMA. Hasil analisis visual, ditemukan kebocoran pada seal oil. Hasil dimension inspection pada komponen coupling differential, ditemukan bahwa coupling mengalami keausan di bagian sisi distance coupling dan tidak terdapat pengukuran dimensi coupling terhadap ukuran standard dari pabrik di QA sheet BRC. Dari penelitian ini menunjukkan bahwa penyebab terjadinya external leak, karena keausan dari bagian coupling differential yang diakibatkan pemakaian berulang /part reuse yang dilakukan secara berkelanjutan.
Co-Authors Agung Dwi Nugroho, Agung Dwi Ali Abrar, Ali Fahrudin Fahrudin Fitri Wahyuni Musrinah, Musrinah Subur Mulyanto, Subur Suryadi, Rian Yudi Kurniawan