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All Journal EPI International Journal of Engineering Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Techno Bahari Maritime Park: Journal Of Maritime Technology and Socienty Jurnal Riset & Teknologi Terapan Kemaritiman Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Sitorus, Chris Jeremy Verian
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Journal : EPI International Journal of Engineering

 1 
Tug-Barge Operating Costs based on Charterer Versus Ownership Perspective. A Case Study: Nickel Ore Transport Boenaga-Fatufia Route Sitorus, Chris Jeremy Verian; Idrus, Misliah; Chaerunnisa, Andi Sitti
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.07

Abstract

The Tug-barge operating costs for nickel ore transhipment at Boenaga-Fatufia are based on charter and shipowner. A comprehensive study on Tug-barge investment feasibility needs to focus on the most profitable option. This study aims to determine the feasibility of investing in a Tug-barge, considering a charter Tug-barge with shipowner (newbuilding tug-barge and secondhand Tug-barge is feasible compared to a new building Tug-barge and charter Tug-barge. The highest NPV is for the secondhand Tug-barge, IDR 18.642.830.529; rhe secondhand Tug-barge also gas the highest IRR value of 20%. The secondhand Tug-barge has the fastest Payback Period, Which is 4.18 years.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.
Co-Authors Abdillah, Riza Abdul Mujib Syadzali Agusty, Cindy Lionita Al Hakim, Muhammad Abdul Ghofur Alamsyah Alamsyah - Anjas Syam, Muhammad Ariani, Vidya Rezeki Arifuddin, Andi Mursid Nugraha Bahri, Irham Cahyani, Alviana Eka Chaerunnisa, Andi Sitti Chairul Paotonan Faisal Mahmuddin Hariyono, Hariyono Ikhwani, Rodlian Jamal Kumandang, Niti Gede Kustiwansa, Harlian Lionita Agusty, Cindy Lumenteri, Fido Fortunatus M. Uswah Pawara Mas'ud M, Ahmad Azwar Misliah Idrus mubarak, azhar aras Ningrat, Andi Nizam, Syahrul Rachmianty, Andi Raditya, Muhammad Yogi Suandar Baso Suardi Suardi Syahab, Husein Syam, Muhammad Anjas Taufik Hidayat Wahidah, Jusma Wahyu Pratama, Fernanda Wardina Suwedy Wira Setiawan wulandari, amalia ika