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Preliminary Design and Energy Production of a Mobile Floating Structure (MFS) for Offshore Wind Turbines in Indonesian Waters Pawara, Muhammad Uswah; Sitorus, Chris Jeremy Verian; Hariyono, Hariyono; Arifuddin, Andi Mursid Nugraha; Alamsyah, Alamsyah; Hidayat, Taufik; Suardi, Suardi; Syadzali, Abdul Mujib; Mahmuddin, Faisal
EPI International Journal of Engineering Vol 8 No 1 (2025): Volume 8 Number 1, Februari 2025
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

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Abstract

The Mobile Floating Structure (MFS) is an innovative floating wind turbine concept that utilizes a catamaran hull design to enhance mobility and operational efficiency. Unlike stationary platforms, the MFS can relocate to areas with higher wind energy density, making it a promising solution for optimizing wind energy harvesting in offshore environments. This study focuses on the preliminary design and energy production of the MFS. Maxsurf is used to analyze hydrostatics and assess the hydrodynamic performance of the MFS hull after the dimension of the MFS is determine with key considerations including rotor diameter and the weight of the wind turbine. Furthermore, four wind turbines are installed in the MFS. Those aspect were integrated into the design process to ensure realistic operational adaptability. As result. the resulting dimensions of the MFS were determined utilizing Maxsurf. Moreover, different with the previous study that use satellite data, the present study employs reanalysis data to estimate the energy density and power production of MFS. the energy density map is also produced in the present study to determine the monthly location of the MFS. The energy production of the MFS with four turbines has been calculated, and the energy production map is also drawn. Finally, the energy production of the MFS in the chosen location has also been estimated. The energy production map can be utilized to develop MFS in other location.
Determination of Electrical Power for Lighting Distribution Using LED Lights on KM. Tuna Kita Suardi, Suardi; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian; Arifuddin, Andi Mursid Nugraha; Pawara, Muhammad Uswah; Hariyono, Hariyono; Alamsyah, Alamsyah; Cahyani, Alviana Eka; Mubarak, Azhar Aras; Lumenteri, Fido Fortunatus
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.1287

Abstract

Fishing vessels are specialized ships designed to support commercial fishing operations by integrating various structural and functional elements such as hull dimensions, deck layout, load capacity, crew accommodations, propulsion systems, and supporting equipment. One critical yet often overlooked component of such vessels is the lighting system, which plays a key role not only in ensuring operational safety and visibility but also in enhancing fishing effectiveness, particularly during night operations. Currently, many fishing vessels still rely on conventional fluorescent lighting, which is less energy-efficient and has a shorter operational life compared to modern alternatives such as LED technology. This study addresses the inadequacy of current lighting installations on fishing vessels by proposing a redesigned electrical installation system utilizing LED lamps. The objective is to develop an efficient and functionally optimized lighting plan that reduces energy consumption and operational costs while improving onboard visibility. Additionally, LED lights can serve dual purposes on fishing vessels—not only for general illumination but also as fish-attracting lights, which may contribute to increased catch yields. The research employs the Zonal Cavity Method (also known as the Lumen Method) as the primary analytical approach. This method enables the calculation of illumination levels by considering inter-surface reflectance and dividing each interior space into three distinct zones: the High Ceiling Cavity (HCC), High Room Cavity (HRC), and High Floor Cavity (HFC). Illumination levels are then determined according to established lighting standards for each functional area within the vessel. The results of the analysis demonstrate that LED-based lighting systems significantly outperform fluorescent systems in terms of energy efficiency, uniformity of light distribution, and alignment with lighting standards. Furthermore, the proposed installation plan offers long-term operational benefits, including reduced maintenance requirements and lower power consumption. The findings support the broader adoption of LED lighting in small-scale fishing vessels and suggest further research into integrating solar-based energy systems to enhance sustainability and self-sufficiency in future vessel designs.
Design of Phinisi Tourism for IKN-Balikpapan Bay Route Alamsyah, Alamsyah; Abdillah, Riza; Suardi; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian; Hariyono
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 2, July 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.44451

Abstract

Balikpapan Bay connects Balikpapan City with the new capital city of the Republic of Indonesia (IKN). Currently, many community activities in Balikpapan Bay include functioning as a crossing, loading and unloading, and fishing. Balikpapan Bay also offers an unforgettable water tourism experience with many intriguing attractions for all ages, such as water slides and diving. IKN is utilized by the development of marine transportation to create marine tourism potential in Balikpapan Bay. The purpose of the research project is to build a tourist phinisi ship that allows tourists from within and outside the country to spend their free time on board and enjoy the splendor of Balikpapan City and IKN with a cultural concept. Phinisi will be equipped with lodging, museums, cafes, and restaurants, all depending on the design of the boat. The research stages include designing a general arragement that produces data in the form of main dimensions, hull form coefficients, lines plans, general arrangements, 3D designs, and interior rooms. The research method used is the parentship approach. The main dimensions obtained in my final assignment include; loa = 55 m, B = 9 m, H = 5 m, T = 3.5 m, Vs = 9 Knots, Crew 11 people, passengers = 15 people
Seakeeping Performance and Passenger Comfort Assessment of a 300 GT Ro-Ro Ferry Using RAO, MSI, and MII Analyses Wahidah, Jusma; Ariani, Vidya Rezeki; Alamsyah; Wulandari, Amalia Ika; Suwedy, Wardina; Sitorus, Chris Jeremy Verian; Hariyono; Kustiwansa, Harlian; Agusty, Cindy Lionita; Syam, Muhammad Anjas
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 3, November 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

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Abstract

This study examines the motion response and onboard comfort of a Ro-Ro ferry under varying wave directions and speeds using the Response Amplitude Operator (RAO), Motion Sickness Incidence (MSI), and motion-induced interruptions (MII) as evaluation parameters. Simulations were conducted using Maxsurf Motion software with wave heights of 3 m and 3.5 m and encounter angles of 0° (following seas), 90° (beam seas), and 180° (head seas) at vessel speeds of 0 and 12 knots. The MSI was assessed using both simulation results and empirical calculations, whereas the MII was evaluated according to the ISO 2631 standards at three onboard locations: the passenger, navigation, and vehicle decks. The RAO results indicate that the vessel met the NORDFORSK (1987) motion criteria under following and head seas but exceeded the roll limits in beam seas. The MSI values remained within the moderate comfort range, except under head seas at 12 kn, where the values approached the alert thresholds. The MII remained within acceptable levels under most conditions, although probable interruption levels were observed on the passenger and vehicle decks during beam sea conditions. Overall, the findings emphasize that wave direction and vessel speed significantly influence motion-induced discomfort and operational performance, underscoring the importance of optimizing route planning and speed to improve passenger safety and seakeeping performance on roll-on/roll-off ferries.
ANALISA KEKUATAN KONSTRUSKI DOUBLE BOTTOM KAPAL AKIBAT PERUBAHAN UKURAN MANHOLE SEBAGAI UPAYA UNTUK MENINGKATKAN KESELAMATAN PELAYARAN DI ALKI II Jamal Ikhwani, Rodlian; Hariyono, Hariyono; Mujib Syadzali, Abdul; Alamsyah, Alamsyah; Syahab, Husein
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7858

Abstract

This study analyzes the strength of the ship's double bottom construction due to changes in manhole size to improve shipping safety in Indonesian Archipelagic Sea Lane II (ALKI II). The study was conducted at Taboneo Anchorage, South Kalimantan, which is a busy shipping route. The initial stage includes measuring the ship's structure and tidal data, as well as collecting secondary data in the form of construction drawings and material specifications for General Cargo type ships. Next, structural modeling was carried out using the Finite Element Method (FEM) approach with reference to Indonesian Classification Bureau (BKI) Rules 2025. The cargo load and bottom load were calculated and input into the model. Three variations of manhole sizes were tested: 350 x 450 mm, 400 x 600 mm, and 400 x 800 mm. The simulation results show that at 350 x 450 mm, the maximum stress is 111.23 N/mm² and the displacement is 4.9 mm, still safely below the BKI permit limit (150 N/mm²). At a size of 400 x 600 mm, the stress increases to 124.68 N/mm² with a displacement of 5.32 mm, which remains safe and recommended. However, the size of 400 x 800 mm produces a stress of 283.23 N/mm² and a displacement of 9.79 mm, exceeding the allowable limit and thus risking structural failure. The maximum recommended manhole size is 400 x 600 mm to maintain construction strength and navigation safety in ALKI II.
Computer-Based Simulation on LCB Positions in Indonesian Traditional Wooden Ship Abdurrahman, Luthfi Abdurrahman; Arifuddin, Andi Mursid Nugraha; Ardianti, Andi Ardianti; Hariyono, Hariyono; Lolo, Musa; Irawan, Reynadi Firzy; Pengestu, Pria Adi; Prayoga, Dimas; Pangestu, Aldo; Pawara, Muhammad Uswah
International Journal of Marine Engineering Innovation and Research Vol 9, No 4 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.22054

Abstract

A Traditionl Wooden ship in North Penajam Paser is built without initial calculation to predict the resistance that will occur based on the shape of the hull. The ship is built solely based on the main dimensions and the number of engines to be installed, without considering the optimal hull shape. The hull shape is an important component in supporting the hydrostatic performance of a ship. Planning the hull's shape affect the ship's resistance value and ultimately impacts the ship's engine power requirements. The purpose of this research is to obtain the resistance value of the existing ship and determine the hull shape with a lower resistance value through computer-based simulations. The computer simulation approach based Holtrop method is used to determine the position of the LCB point based on the hull shape. Then, it examine the effect of the LCB position on the ship’s resistance of the hull shape. The hull shape simulation was conducted without changing the ship’s main dimensions. The simulation result show that the position of the LCB on the existing hull shape is 8.514 m from the AP, with a ship resistance value is 7.4 kN. Meanwhile, the optimum hull shape was found when the location of the LCB point was moved 0.1 m forward from its initial position (model 4). The resistance value in Model 4 decreased by 3.8% compared to the initial resistance value. In addition to model 4, models 2 and 3 also reduced the ship's resistance value, with changes of 0.9% and 2.1%, respectively. Furthermore, this optimal hull shape can be developed in the next analysis stage, such as ship structure planning and other design analyses.