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All Journal JURNAL KAJIAN TEKNIK MESIN Leuser Journal of Environmental Studies
Ibrahim, Riki Firmandha
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Control & Systems Engineering Earth & Planetary Sciences Energy Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Other

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Optimizing Motorcycle Manufacturing Sustainability through the Integration of Waste Heat Recovery and Metal Scrap Recycling: A Process Engineering Approach Saiful, Rifki; Yandri, Erkata; Hilmi, Erik; Hamja, Nasrullah; Uhanto, Uhanto; Fitriani, Fitriani; Ibrahim, Riki Firmandha
Leuser Journal of Environmental Studies Vol. 2 No. 2 (2024): October 2024
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v2i2.225

Abstract

The automotive industry manufacturing has experienced rapid growth 2–3 times by 2050, with motorcycles constituting around 30% of vehicles worldwide, but this increase in production has significantly heightened the demand for raw materials and energy. A major challenge arises in managing material waste and waste heat generated during the manufacturing process. This research aims to develop a framework that optimizes the synergy between material waste recycling and waste heat recovery to enhance the sustainability of the motorcycle industry, reduce waste, and lower energy consumption. The design leverages waste heat from the melting process to preheat raw materials, raising temperatures from around 50 °C to 350 °C before melting, thereby reducing additional energy needs, lowering emissions, and decreasing operational costs. Utilizing waste heat for preheating not only mitigates environmental impact and thermal load but also significantly improves energy efficiency, ultimately resulting in cost savings and optimized resource use. Utilizing waste heat directly for preheating raw materials has effectively lowered energy consumption by as much as 30%. This approach not only improves operational efficiency but also decreases production costs and minimizes environmental impact, offering a more sustainable solution for the manufacturing sector.
Pengaruh Airfoil dan Jumlah Sudu pada Perancangan Vertikal Axis Wind Turbine (VAWT) untuk Kecepatan Angin Rendah Sholichan, Sholichan; Uyun, Aep Saepul; Novianto, Bangun; Fitriani, Fitriani; Ibrahim, Riki Firmandha; Sugiyanto, Didik
JURNAL KAJIAN TEKNIK MESIN Vol 8, No 1 (2023): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jktm.v8i1.6681

Abstract

AbstrakSelain potensi angin karena bentuk geografisnya, Indonesia juga memiliki potensi angin yang dapat dimanfaatkan dari  pergerakan arus lalu lintas di jalan raya atau jalan tol. Pergerakan kendaraan  berkecepatan tinggi di jalan raya menghasilkan angin lokal, yang  dapat digunakan untuk menghasilkan energi listrik. Angin lokal ini memiliki variabilitas yang lebih kecil, terutama jika lalu lintas  jalan raya  konstan. Tujuan utama dari penelitian ini adalah untuk mendesain Vertical Axis Wind Turbine yang dapat bekerja pada kecepatan angin rendah. Pada pendekatan teoritis, software Qblade digunakan  untuk menganalisa beberapa jenis Airfoil yaitu NACA 0012, NACA 0013, NACA 0014, NACA 0015, NACA 0016 dengan variasi sudu 2, 3 dan 4 angka pada masing-masing konfigurasi aerodinamis. Koefisien performa turbin angin sumbu vertikal yang optimal dapat diperoleh pada simulasi turbin yang menggunakan airfoil NACA 0016 sebesar 1,33 dengan konfigurasi jumlah sudu adalah empat buah pada TSR 3,5 sehingga diperoleh daya sebesar 87,78 watt pada kecepatan angin 5 m/s dan kecepatan putar 300 rpm. Kata kunci: VAWT, Darrieus, Qblade  AbstractApart from wind potential due to its geographical shape, Indonesia also has wind potential which can be exploited from the movement of traffic flow on highways or toll roads. The movement of high-speed vehicles on the highway generates local wind, which can be used to generate electrical energy. These local winds have less variability, especially if road traffic is constant. The main objective of this research is to design a vertical axis wind turbines to operate in low wind speed. In the theoretical approach, Qblade software is used to analyze several types of airfoils, namely NACA 0012, NACA 0013, NACA 0014, NACA 0015, NACA 0016 with 2, 3 and 4 number blade variations on each aerodynamic configuration. The optimal vertical axis wind turbine performance coefficient can be obtained in a turbine simulation that uses a NACA 0016 airfoil of 1.33 with a configuration of four blades at a TSR of 3.5 so that a power of 87.78 watts is obtained at a wind speed of 5 m/s and rotating speed 300rpm. Keywords: VAWT, Darrieus, Qblade  
Co-Authors Didik Sugiyanto Fitriani Fitriani Hamja, Nasrullah Hilmi, Erik Novianto, Bangun Saiful, Rifki Sholichan, Sholichan Uhanto, Uhanto Uyun, Aep Saepul Yandri, Erkata