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All Journal Sebatik Scientific Journal of Mechanical Engineering Kinematika
Renal Fajri
Politeknik Sinar Mas Berau Coal
Automotive Engineering Computer Science & IT Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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MENATA ULANG LAYOUT FASILITAS GUDANG POLITEKNIK SINAR MAS BERAU COAL MENGGUNAKAN METODE CLASS BASED STORAGE Safitriani, Dewi; Nugraha, Kris Adi; Asrory, Fahriza Fawwas; Fajri, Renal; Gabriel, Soffy Angelita
Sebatik Vol. 28 No. 1 (2024): June 2024
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v28i1.2449

Abstract

Penelitian ini dilatarbelakangi adanya penataan lemari dan barang pada gudang Politeknik Sinar Mas Berau Coal (Poltek Simas Berau) yang saat ini kondisinya belum tertata dengan rapi sehingga membuat kapasitas gudang belum dapat dimanfaatkan secara optimal sehingga terjadi penurunan kapasitas gudang yang sebenarnya. Penataan lemari yang tidak rapi membuat jarak untuk mencari barang/material mengalami kesulitan dan jaraknya jauh dari pintu utama. Dengan pergerakan barang yang cepat (fast moving) dapat menghambat kelancaran aktivitas keluar masuknya barang. Tujuan peneletian ini adalah untuk menganalisa gudang Poltek Simas Berau sesuai dengan FSN (fast, Slow, Non moving), me-relayout gudang Poltek Simas Berau dan meminimalkan jarak material handling serta meningkatkan kelancaran aksesibilitasnya. Penelitian ini menggunakan metode class based storage dengan pendekatan kuantitatif. Menggunakan analisis FSN dengan perhitungan TOR (Turn Over Ratio) serta analisis material handling. Hasil penelitian menunjukkan adanya layout gudang Poltek Simas Berau saat ini masih terdapat barang yang termasuk non-moving dimana terletak dekat dengan pintu masuk/keluar sehingga menghalangi kegiatan pengambilan barang. Pada hasil layout usulan barang dikelompokkan kedalam 5 tempat penyimpanan dimana dari enam (6) tempat penyimpaan saat ini akan dijadikan satu dengan barang fast moving yaitu kertas HVS. Keseluruhan penempatan telah dianalisis dengan menggunakan analisis FSN berdasarkan TOR dan meminimalkan jarak termpuh terhadap pintu keluar/masuk sebanyak 3,64 meter. Total jarak material handling sebuah area penyimpanan pada gudang Poltek Simas Berau berdasarkan perhitungan TOR pada layout gudang saat ini adalah 116,45 meter. Hasil layout gudang usulan jarak material handling berdasarkan perhitungan TOR adalah 858 meter yang artinya relayout gudang menggunakan metode class based storage dapat mengurangi jarak material handling sebesar 304,45 meter atau sebesar 26,13%.
Utilization of Cocoa Pod Husk Waste as Fuel for Downdraft Type Gasification Reactor of a Capacity of 960 Liters in Berau Regency Tidar, Feri Putra Prakus; Fajri, Renal
Sebatik Vol. 28 No. 2 (2024): December 2024
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v28i2.2509

Abstract

This experiment aims to investigate the performance characteristics of a downdraft gasification reactor fueled by cocoa pod husk as a technological solution for obtaining alternative renewable energy sources to replace fossil fuels and natural gas. The research was conducted experimentally on a gasification reactor made of SS310 thermal-resistant carbon steel material. The reactor has dimensions of 35 centimeters in diameter and 250 centimeters in height. Measurements in the gasification zone were performed using seven K-type thermocouples installed along the reactor wall. Fuel was fed continuously at a rate of 4 kg/hour. The research involved varying the temperature in the oxidation zone at 900 ºC, 950 ºC, 1000 ºC, 1050 ºC, and 1100 ºC. Data collection was carried out at these different temperature variations and processed to determine the performance parameters of the gasification reactor, including gas composition, temperature distribution along the reactor wall, and the lower heating value (LHV) of the syngas produced. The results showed the highest temperature distribution in the drying zone (205 ºC), pyrolysis zone (575 ºC), and reduction zone (520 ºC), obtained at an oxidation temperature of 1100 ºC. Meanwhile, the optimum syngas quality was achieved at an oxidation temperature of 1000 ºC, with the composition of flammable syngas CO, H₂, and CH₄ being 27.08%, 8.53%, and 2.41%, respectively, and the highest LHV of 5206 kJ/m³. In general, increasing the oxidation temperature contributed positively to the performance of the gasification reactor using cocoa pod husk waste.
Coconut Shell Charcoal Briquettes Processing Process Using Two Modified Combustion Types Safitriani, Dewi; Nugraha, Kris Adi; Purba, Arini Anestesia; Muttaqien, Zaenal; Fajri, Renal; Musvirah, Nur Ainun
Sebatik Vol. 28 No. 2 (2024): December 2024
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v28i2.2523

Abstract

The process of producing briquettes from coconut shells is a promising alternative for waste utilization, creating products with high economic value for small industries. Coconut shell briquettes have a relatively high calorific value and are environmentally friendly. However, the production process, particularly in making charcoal and briquettes, still requires more efficient techniques and technology. The type of furnace used significantly affects the characteristics of the charcoal briquettes produced. The results of the study indicate that both combustion methods have a significant impact on the quality of the charcoal briquettes. The open furnace made of iron material required less time compared to the closed furnace combustion method. However, the closed furnace method is safer as it prevents direct contact with fire during combustion. In the combustion tests conducted three times using a closed furnace made of drum or zinc material, the charcoal yield was approximately 20%. A combustion test using 20 kg of coconut shell material produced 7.5 kg more charcoal with the closed furnace compared to the open furnace made of iron plate material. Additionally, the smoke produced from the closed furnace was minimal but steady throughout the combustion process. When compared to the quality requirements outlined in SNI 01-6235-2000, the results showed that five parameters met the standard requirements: moisture content, ash content, volatile matter content, fixed carbon content, and calorific value. Based on these findings, it can be concluded that both combustion methods have their respective advantages. The selection of the appropriate method can be tailored to production needs and environmental considerations.
ANALISIS ELEMEN HINGGA BERBASIS ANSYS PADA SAMBUNGAN BAUT STRUKTUR COOLING TOWER Rachmat Subagyo; Riyki Apriandi; Rakyan Permadi; Yanuar Iswahyudi; Renal Fajri
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.763

Abstract

The cooling tower is a crucial component in industrial cooling systems, serving to dissipate heat from the working fluid. One of the main structural elements in a cooling tower is the bolt, which connects various components and plays a role in bearing mechanical loads. This study aims to perform numerical modeling and simulation of bolts within the cooling tower structure to understand the stress and deformation distribution under operational loads. The simulation was conducted using the finite element method based on ANSYS software, applying a pretension force of 200 Nm and a thermal load of 40 °C. The results show a maximum stress of 0.327 MPa at the contact area between the bolt head and the connecting plate, with a total deformation of 5.08×10⁻⁵ mm. The observed stress concentration indicates a potential risk of fatigue failure at the joint. This study provides valuable insights into the optimization of bolt design and material selection to enhance the cooling tower's resistance to operational loads.
Co-Authors Asrory, Fahriza Fawwas Fachry Abda El Rahman Gabriel, Soffy Angelita Musvirah, Nur Ainun Nugraha, Kris Adi Purba, Arini Anestesia Rachmat Subagyo Rakyan Permadi Riyki Apriandi Safitriani, Dewi Tidar, Feri Putra Prakus Yanuar Iswahyudi