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All Journal Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Nurul Iman Supardi
Universitas Bengkulu
Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Variasi Kemiringan Front Wall Dan Perioda Gelombang Air Laut Terhadap Daya Udara Yang Dihasilkan Dan Efisiensi Pada Model Oscillating Water Column (Owc) Pembangkit Tenaga Gelombang Alif Rahman Peldiansah Ismael; Nurul Iman Supardi; Angky Puspawan; Yovan Witanto; ASF Alqap
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.391

Abstract

Ocean wave energy is a renewable resource with significant potential for development in Indonesia, given its vast coastal areas. One technology for converting wave energy into usable power is the Oscillating Water Column (OWC) system. This system utilizes the vertical motion of seawater inside a chamber to generate airflow, which then drives a turbine to produce energy. This study aims to analyze the effect of oscillating column tilt angle and wave period variations on the energy conversion efficiency of an OWC model, and to determine the optimal tilt angle for maximum efficiency in converting wave power into air power. The research was conducted experimentally using a laboratory-scale OWC model measuring 1500 mm in length, 300 mm in width, and 500 mm in height. The oscillating column tilt angles tested were 0°, 35°, 40°, and 45°. Artificial waves were generated using a motor drive at 30 rpm, 40 rpm, and 50 rpm, producing wave periods of 2.1 seconds, 1.6 seconds, and 1.2 seconds, respectively. Measured parameters included air velocity, motor speed, wave period, wavelength, and wave height. Calculations determined wave power, air power, and system efficiency. Results show tilt angle and wave period significantly affect OWC efficiency, with the highest efficiency reaching 41.00% at 40° tilt and 1.6-second waves.
RANCANG BANGUN INKUBATOR PENETAS TELUR PENYU (CHELONIOIDEA) SEMI OTOMATIS PENENTU JENIS KELAMIN PENYU Dedi Suryadi; M Ridho Sepriasi; Nurul Iman Supardi
JURNAL TEKNIK MESIN Vol 15, No 1 (2026): APRIL 2026
Publisher : Universitas Bandar Lampung

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Abstract

Penelitian ini bertujuan untuk merancang dan membuat inkubator penetas telur penyu (Chelonioidea) semi otomatis untuk penentuan jenis kelamin penyu. Inkubator ini dilengkapi dengan mikrokontroler Arduino Uno, sensor suhu Thermocouple type-K, dan sensor kelembaban tanah YL-69. Sistem ini dikembangkan untuk mengatur suhu dan kelembaban dari media inkubasi guna mendukung keberhasilan penetasan serta penentuan jenis kelamin penyu. Proses inkubasi dilakukan pada dua ruang inkubasi dengan kondisi berbeda. Ruang inkubasi betina pada suhu 30°C dan kelembaban 60%, serta ruang inkubasi jantan pada suhu 26°C dan kelembaban 70%. Hasil pengujian menunjukkan bahwa sistem mampu menjaga kondisi suhu dan kelembaban sesuai parameter yang ditetapkan. Dari 40 butir telur yang diinkubasi dalam ruang inkubasi betina, berhasil menetas 23 ekor tukik betina dengan persentase 57,5%. Sedangkan dari 40 butir telur yang diinkubasi dalam ruang inkubasi jantan, menetas 18 ekor tukik Jantan dengan persentase 45%. Meskipun keberhasilan penetasan masih tergolong rendah, sistem inkubator semi otomatis ini telah berjalan dengan baik dalam mendukung proses penetasan dan pengondisian jenis kelamin pada penyu
Experimental Study of The Effect of Reactor Temperature Variations on The Characteristics of Oil Resulting from The Pyrolysis Method of Crumb Rubber Solid Waste Angky Puspawan; Nurul Iman Supardi; Agustin Gunawan; Abdul Latif Mubarok; Rifki Sulthan
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4045

Abstract

Energy is an important part of human life because almost all human activities always require energy. Therefore, it is necessary to conduct research to overcome the above problems, namely by making alternative energy by utilizing crumb rubber plant waste into alternative oil. The crumb rubber solid waste that we use comes from the micro blending and macro blending milling process from the process there is waste in the form of granulated rubber (Crumb Rubber Waste). Crumb Rubber Plant waste is currently not being utilized optimally. The basic structure of natural rubber is a linear chain of isoprene units (C5H8) natural rubber is a polymer of hydrocarbon compounds, namely 2–methyl-1,3 butadiane (isoprene). The main purpose of this study is to determine the value of the oil combustion rate resulting from the pyrolysis of crumb rubber solid waste and find out the characteristics of the oil resulting from the pyrolysis of crumb rubber solid waste and find out the comparison of the quality of oil from crumb rubber solid waste. From this study will show the optimum amount of pyrolysis and distillation results to produce oil. Operating conditions take place at atmospheric pressure with temperature variations of 200oC, 250oC, 300oC, and 350oC for 180 minutes for the pyrolysis process which will then be distilled with a temperature of 95°C for 20 minutes. The results showed that % of the conversion of raw materials into oil (amendment) was highest for the pyrolysis process at a temperature of 350oC of 51.86% while in the distillation process pyrolysis oil with a temperature of 350oC as much as 82.55%. For the value of the combustion rate in the largest pyrolysis process with a value of 0.975  at a temperature of 350oC and a distillation process of 1,612  at a temperature of 350oC.
Co-Authors Abdul Latif Mubarok Agustin Gunawan Alif Rahman Peldiansah Ismael Angky Puspawan ASF Alqap Dedi Suryadi M Ridho Sepriasi Rifki Sulthan Yovan Witanto