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Nurir Rohmah
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Jurnal Techno Bahari
Published by Politeknik Negeri Madura
ISSN : 24068829     EISSN : 27468399     DOI : -
Core Subject : Science, Engineering,
Electrical & Electronics Engineering Energy Mechanical Engineering Transportation
Focus and Scope This journal encompasses original research articles, including: Technology Science Machinery Engineering Mechanical Engineering Shipbuilding Engineering Electrical Engineering (Electronics)
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 146 Documents
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Analisis Konstruksi Kapal Ikan Berbahan Fiber Reinforced Plastic di Puger dengan Menggunakan Metode Elemen Hingga Arianto, Pratama Yuli; Pratama, Awang Dika; Sumarji; Putra, Alfian Andhika; Jatisukamto, Gaguk
Techno Bahari Vol. 12 No. 1 (2025): Maret
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i1.364

Abstract

Most fishing vessels used by local fishermen in Puger are constructed from Fiberglass Reinforced Plastic (FRP). These vessels are still built using traditional methods, where the design is based on pre-existing models that are subsequently modified. As a result, the structural strength of the vessels when operating in the waters of Jember remains uncertain. Therefore, an analysis is required to determine the maximum load-bearing capacity of the vessel structure under marine operating conditions. This study involved field measurements and interviews with local fishermen to collect data on the vessel’s principal dimensions, geometry, cargo weight, and load positioning. The collected data were used to develop a structural model, which was then simulated using Ansys Workbench for Student 2024 Version R1 to analyze the loading conditions experienced by the vessel. The simulation results yielded Von Mises stress and deformation values for five different loading scenarios. The equivalent stress values obtained were 3.617 MPa, 2.8763 MPa, 2.8198 MPa, 3.4382 MPa, and 3.2877 MPa, respectively. Meanwhile, the corresponding deformation values were 0.41003 mm, 0.18602 mm, 0.17995 mm, 0.35096 mm, and 0.30843 mm. The analysis indicates that the highest equivalent stress occurred under the first loading condition, with a value of 3.617 MPa, which remains below the allowable stress limit of the material, defined as 9.46 MPa.
ANALISA KECEPATAN DINAS TERHADAP DESAIN LAMBUNG KAPAL TANKER 1214 DWT Ilhamsyah Putra, M. Alfan; Wahid, M Abdul; Rohman, Abdul; Muzaka, Khairul; Oloan, Achdri
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.381

Abstract

A tanker is a type of ship designed for loading oil and other liquid products. This ship, in its operation, experienced delays in cargo delivery, one of which was due to inadequate ship speed. In planning the service speed, it can affect the shape of the tanker hull. A good ship hull design has a large cargo capacity and a small ship resistance. Therefore, this final project analyzes changes in ship hull design due to variations in ship service speed. There are 3 ship hull models (A, B, C) and service speeds (10,11,12 Knots). Hull A with ship resistance at 10 knots of 39.4 kN and produces an estimated cargo volume of 985,373 m3. Hull B with ship resistance at 11 knots of 48.2 kN, and produces an estimated cargo volume of 973,725 m3, and Hull C with ship resistance at 12 knots of 59.4 kN, and produces an estimated cargo volume of 958,633 m3. Keywords: Tanker, Speed, Hull, Resistance, Volume.
Laundry Drying Chambers with Greenhouse Effect (GHE) Utilization Hadiwijaya, Lukman; Furqon, Muhammad; Amarullah; Hamid, Abdul; Dwi Kurniasih, Agustia; Jakfar, Amin; Fikri, Mohammad Anas
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.388

Abstract

The greenhouse effect is defined as an increase in the earth's temperature. The increase in the earth's temperature is caused by the trapping of long-wave (infrared) sunlight by greenhouse gases. The greenhouse effect (GHG) is in the troposphere, which is the atmospheric layer on the earth's surface. The purpose of making a dryer by utilizing the greenhouse effect as a medium to help overcome the problem of drying clothes that have been relying on solar heat. But it is different when the rainy season arrives, by utilizing solar heat energy and managing it in such a way by using the greenhouse effect system (Green House Effect). In this research, we found that equipment with a base material made of glass can absorb heat faster, because the glass material has a fairly high thermal conductivity value. By applying heat transfer study materials, so that the trapped heat can be used as one of the sources of disposable dryers. Providing an exhaust fan on the roof of the tool as a mass transfer medium for evaporation of water in the dryer. The size of the tool to be made is 200 x 180 x 60 cm using a frame and galvanized glass. The efficiency obtained from the dryer is 8.98% in cloudy and 8.94% in sunny weather.
Analisis Performa Rangkaian Pompa Pararel Seri di Laboratorium Fluida PPNS Setelah di Desain Ulang: Performance Analysis of Series-Parallel Pump Circuits in the PPNS Fluid Laboratory After Redesign Priyonggo, Projek; Ariwiyono, Nopem; Wirawan, Adi; Hanif, Fahmi; Poernomo, Heroe
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.396

Abstract

Pompa sentrifugal merupakan perangkat vital dalam proses pemindahan fluida di berbagai sektor industri. Di lingkungan akademik, pompa juga digunakan untuk tujuan pembelajaran dan eksperimen, seperti di Laboratorium Mesin Fluida PPNS. Salah satu unit praktik yang tersedia adalah sistem pompa paralel, yang secara prinsip digunakan untuk meningkatkan debit aliran total. Namun, sistem yang tersedia sebelumnya memiliki beberapa kendala, seperti instalasi pipa yang tidak seimbang, banyaknya sambungan bocor, dan distribusi aliran yang tidak merata. Kondisi ini menyebabkan data hasil praktik kurang valid dan menyulitkan mahasiswa dalam memahami teori sistem paralel. Oleh karena itu, penelitian ini dilakukan untuk meredesain sistem perpipaan agar distribusi aliran dan performa pompa menjadi optimal dan sesuai teori. Metode yang digunakan dalam pengujian adalah dengan menghitung head losses, debit dan daya pompa. Dari hasil perhitungan ini diketahui performa pompa tunggal rata-rata head sebesar 12,13 m dan rata rata daya pompa sebesar 81,381 Watt. Sedangkan performa dari 2 pompa yang disusun paralel menghasilkan rata-rata debit sebesar 0,001228, rata-rata head pompa sebesar 12,71 m dan rata-rata daya pompa sebesar 152,4825 Watt. Secara keseluruhan, variasi dalam debit dan daya menunjukkan adanya perubahan dalam performa pompa, sementara head cenderung tetap stabil pada sebagian besar titik pengukuran, menandakan konsistensi tekanan yang dihasilkan.
Electrolysis Using Magnesium and Copper Electrodes: A Study of Voltage, Current, and Light Intensity Putrawardana, Ulika Trijoga; Amarullah; Masruroh, Ulil; Kriswahyudi, Yoga; Furqon, Muhammad; Afandi, Achmad
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.402

Abstract

This research aims to develop a lighting system that utilizes seawater as an electrical energy source through the electrolysis process. Two metals, copper and magnesium, are used as electrodes that generate DC voltage when immersed in seawater. The output voltage from this process is relatively low, so a boost converter circuit is employed to increase the voltage level sufficiently to power a lamp. The converter circuit is designed using electronic components such as an inductor, diode, capacitor, and transistor to regulate and stabilize the output voltage. The experimental results show that the system can produce up to 5 watts of power and successfully illuminate a lamp with optimal brightness. This study demonstrates that combining seawater electrolysis with an electronic voltage-boosting circuit can serve as a simple and effective renewable energy alternative, particularly for coastal areas that are not yet connected to conventional electricity networks.
ANALISA PENGARUH SUDUT HALUAN KAPAL SELF PROPELLED OIL BARGE (SPOB) 216 GT TERHADAP HAMBATAN DENGAN METODE COMPUTATIONAL  FLUID DYNAMIC (CFD) Rohman, Abdul; Rulianto, Jangka; Suranto, Wawan
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.403

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi sudut haluan terhadap hambatan total kapal Self-Propelled Oil Barge (SPOB) 216 GT menggunakan metode Computational Fluid Dynamics (CFD). Efisiensi desain haluan sangat mempengaruhi performa hidrodinamis kapal, terutama pada kecepatan jelajah 5 knot. Dalam studi ini, dilakukan modifikasi haluan dengan tiga variasi sudut, yaitu 49°, 42°, dan 39°, serta dilakukan pemodelan dan simulasi numerik menggunakan  Metode CFD. Hasil simulasi menunjukkan bahwa modifikasi sudut haluan berpengaruh signifikan terhadap nilai hambatan kapal. Sudut haluan 39° menghasilkan nilai hambatan paling rendah sebesar 3,995 kN, diikuti oleh 42° sebesar 4,135 kN dan 49° sebesar 4,241 kN berdasarkan simulasi CFD. Dengan demikian, sudut haluan 39° direkomendasikan sebagai desain optimal untuk meningkatkan efisiensi pelayaran dan mengurangi konsumsi bahan bakar

Page 15 of 15 | Total Record : 146

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