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A novel algorithm for ship characteristic points extraction based on density clustering J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-03-27 Weifeng Li, Haoda Zhang, Guoyou Shi, Xinjian Wang, Robert Desrosiers, Siming Fang
With the widespread application of ship Automatic Identification System (AIS) in maritime operations, a large number of ship trajectories become available. This study aims to improve the safety of ...
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Future of maritime autonomy: cybersecurity, trust and mariner's situational awareness J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-03-20 J. D. Palbar Misas, R. Hopcraft, K. Tam, K. Jones
As technology evolves, the level of automation in the maritime industry also grows. Given the extensive benefits they offer, the industry will continue to develop its digital capabilities in order ...
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The construction of a neural network proxy model for ship hull design based on multi-fidelity datasets and the parameter freezing strategy J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-03-18 Yu Ao, Shaofan Li, Yunbo Li, Jiaye Gong
Designing a ship hull to keep the hydrodynamic performance meet the requirements is an indispensable step in the ship's preliminary design. However, in the traditional design process, the design wo...
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A moment of maritime opportunity? The U.S. Navy operational energy challenge J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-03-11 Jeffrey Michael Voth, Emily G. Pence, Victor Sorrentino, Glen H. Sturtevant
The U.S. Department of Defense's National Defense Strategy prioritises the U.S. Navy's focus on strategic competitors, equipped with long-range weapons, significant anti-access/area denial (A2/AD) ...
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Human-autonomy collaboration in supervisory risk control of autonomous ships J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-24 Thomas Johansen, Ingrid Bouwer Utne
This paper presents a method for developing and testing a risk-based control system, as a first step towards including the human supervisor explicitly in the design of the system. The result is a c...
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Fault detection in the marine engine using a support vector data description method J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-18 Klaudia Wrzask, Jerzy Kowalski, Van Vang Le, Van Giao Nguyen, Dao Nam Cao
Fast detection and correct diagnosis of any engine condition changes are essential elements of safety and environmental protection. Many diagnostic algorithms significantly improve the detection of...
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Cost-benefit analysis of emission reduction techniques: a case for container vessel J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-16 Emir Ejder, Çağlar Karatuğ, Yasin Arslanoğlu
One of the most important issues in the maritime industry is controlling and reducing the amount of emissions caused by marine vessels. In this respect, the International Maritime Organization sets...
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A pre-exercise screening of helicopter underwater escape training using a modified human reliability analysis with rule-based mechanism J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-15 Samet Bicen, Metin Celik
This study conducts a human reliability analysis to develop a pre-exercise screening tool for helicopter underwater escape training (HUET) to proactively improve training facilities and to contribu...
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USRV: hydrodynamic analysis and design of a novel anti-flow underwater search and rescue vehicle with circuit control and perception system J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-10 Junjie Huang, Zhisen Wang, Wanting Huang, Qijia Yan, Hexi Miao, Deshan Chen
In response to the increasing prevalence of unmanned underwater vehicles, unmanned search and rescue technology has garnered significant attention in recent years. The intricate nature of water env...
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A systems approach to hazard identification for solar-powered and wave-propelled unmanned surface vehicle J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-12 S. D. Kristensen, A. Dallolio, I. B. Utne
Decarbonization is a trend in the maritime industry and may include the use of alternative energy sources on ships. At the same time, autonomous ships are under development. In the future, the two ...
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Adaptive dynamic surface control for trajectory tracking of autonomous surface vehicles with input and output constraints J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-02-08 Qiang Guo, Xianku Zhang, Xinjian Wang
This study aims to address the trajectory tracking control issue of autonomous surface vehicles (ASV) subjected to a constrained input and output. Firstly, combined with the tan-type Barrier Lyapun...
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Adaptive federated filter–combined navigation algorithm based on observability sharing factor for maritime autonomous surface ships J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-01-22 Muzhuang Guo, Xiaomin Zhou, Chen Guo, Yuanchang Liu, Chuang Zhang, Weiwei Bai
The integrated navigation system ensures maritime autonomous surface ships (MASSs) to safely, efficiently, and autonomously complete various operations in different complex navigation environments....
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Review of research progress of autonomous and unmanned shipping and identification of future research directions J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2024-01-11 Ivana Jovanović, Maja Perčić, Ahmad BahooToroody, Ailong Fan, Nikola Vladimir
The maritime industry is following the trend of increased autonomy and digitalisation applied in aviation, automotive, military, and chemical industries. Maritime autonomous and unmanned vehicles h...
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Adversarial waypoint injection attacks on Maritime Autonomous Surface Ships (MASS) collision avoidance systems J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-12-26 G. Longo, M. Martelli, E. Russo, A. Merlo, R. Zaccone
Autonomous navigation is currently subject to particular interest for naval and commercial vessels. In addition to the regulatory effort, several pieces of research tackled the development of new g...
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A novel application of the CORAS framework for ensuring cyber hygiene on shipboard RADAR J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-12-15 Gizem Kayisoglu, Pelin Bolat, Kimberly Tam
Radio Detection and Ranging (RADAR) equipment is a significant information and navigational system onboard vessels and a critical part of a ship’s cyber space. It is an electronic system used not o...
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Numerical investigation on hydrodynamic performance of shaftless rim-driven thruster J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-12-12 Liang Peng, Changfa Wang, Yongqiang Tan, Yi Hu, Zhenlei Chen, Shaohua Xia, Fan Shi
As a new type of propulsion method, the shaftless rim-driven thruster (RDT) has become a research hotspot for ship propulsion due to the absence of the propeller propulsion shaft system setting and...
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Performance evaluation of a bidirectional horizontal axis tidal turbine with S-shaped blades by the sliced section method J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-11-18 Yu Cao, Xiaobo Tang, Jiazhi Wang, Yu Wu, Oleg Gaidai
Understanding the flow pressure distribution on the blade airfoil of the tidal turbine is of great significance for optimising the energy harvesting performance of the blades. In this paper, a bidi...
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Hydrogen carriers for zero-emission ship propulsion using PEM fuel cells: an evaluation J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-11-16 E. S. Van Rheenen, J. T. Padding, J. C. Slootweg, K. Visser
Green hydrogen combined with PEM fuel cell systems is a viable option to meet the demand for alternative maritime fuels. However, hydrogen storage faces challenges, including low volumetric density...
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Autonomous docking of a feeder vessel J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-11-14 Bas J. de Kruif
Autonomous sailing is seen as one of the possible solutions to cope with the decrease in qualified personnel and to minimise the risk to humans and ships in challenging conditions. Autonomy is not ...
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Design and evaluation of novel static mixers for SCR application J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-11-01 Youhong Xiao, Hui Zhao, Xinna Tian, Tao Sun
Static mixers are widely used in selective catalytic reduction (SCR) systems to improve the conversion efficiency and service life of the catalyst by better mixing ammonia and the exhaust stream. H...
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The impact of R&D investment on the new orders received by the shipbuilding enterprises under the background of innovation-driven development J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-10-11 Yanhui Chen, Mengmeng Ma, Jackson Jinhong Mi
Using the panel data of listed shipbuilding enterprises from 2010 to 2021 all over the world, this paper empirically studies the impact of Research & Development investment on new orders received b...
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The effect of tip clearance on the rotor-stator interaction and noise of marine 1.5-stage compressor J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-09-13 Huabing Lu, Youhong Xiao, Zhigang Liu, Ye Yuan, Peilin Zhou
Tip-clearance (TC) noise is significant in compressors and has garnered scholarly attention for the isolated rotor. However, applying these findings to marine compressors with rotor-stator-interact...
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Wind influence and bathymetric effects in wave overtopping based on a long-term field campaign in the Outer Port of Punta Langosteira (Spain) J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-09-09 Raquel Costas, Andrés Figuero, José Sande, Enrique Peña, Alberto Alvarellos, Andrés Guerra
The operability of harbour facilities and the safety of those working within them can be compromised by overtopping. The aim of the present study is to analyse this phenomenon through a long-term field campaign, of 5 years’ duration, in the Outer Port of Punta Langosteira (Spain). Image monitoring techniques were used to identify the events, which allowed to study the influence of climatic variables
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Enhancing resilience in marine propulsion systems by adopting machine learning technology for predicting failures and prioritising maintenance activities J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-08-17 Mohsen Elmdoost-gashti, Mahmood Shafiee, Ali Bozorgi-Amiri
With the rapid transition towards Industry 4.0, many industries have recognised the need to develop intelligent maintenance systems and predictive analytics tools that are able to optimise the perf...
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A probabilistic bottom-up modelling approach for synthetic load profiles within the energy efficiency management of cruise ship cabins J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-07-28 Patrick Schwager, Heinz Bekebrok, Kai Gehrke, Martin Vehse
A reliable estimate of the electrical demand is a decisive factor in the design of electric board systems on cruise ships. This applies to all areas of the ship, including the hotel area with its u...
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Multi-objective optimisation on steady-state thermodynamic parameters of S-CO2 recompression Brayton cycle power generation system for marine waste heat recovery J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-07-21 Pengcheng Pan, Chengqing Yuan, Yuwei Sun, Xinping Yan, Mingjian Lu, Richard Bucknall
Analysis of thermodynamic parameters’ effects on the S-CO2 recompression Brayton cycle for recovering the main engine exhaust gas waste heat of an ocean-going 9000 TEU container ship are carried ou...
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Hydro-acoustic and noise analysis of DTMB4119 marine propeller at different advance coefficients using DES turbulence model J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-07-14 Ehsan Yari, Mohammad Reza Nateghi
Investigating the Hydro-acoustic behaviour and noise of marine propellers is very important, especially in underwater vessels and submarines. The present study aims to numerically model the hydrodynamic noise of a benchmark marine propeller using the computational fluid dynamics method based on the finite volume method under open water conditions. The DES turbulence model is used in the numerical simulation
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Residual strength prediction and structural response of a multi-chamber cabin to a fire J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-07-10 Zhen Guo, Chuang Ma, Yi Liu, Fumin Li, Chenfeng Li
In this study, the fire safety of a ship structure is evaluated using a fire dynamics algorithm for large eddy simulations and a structural-thermal coupling method. Taking a two-story cabin as an e...
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Calculation of categorical route width according to maritime traffic flow data in the Republic of Korea J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-06-14 Jeong-Seok Lee, Yong-Ung Yu
Offshore wind farms have emerged as an effective method for responding to the energy crisis. However, offshore wind power generation has been indiscriminately planned at sea, leading to interference with the traffic routes of merchant ships. Many countries and organisations have set buffer zone standards to ensure the safe navigation of passing vessels, but these standards differ widely. As a typical
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Visualised combustion monitoring and mathematical modelling for moving magnesium particles in water vapour flow J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-05-22 Daolun Liang, Tianhua Xue, Weidong Zhong, Wen Ao, Ke Ren, Yangxu Jiang, Yang Wang, Dekui Shen
Magnesium has received significant attention as a potential hydro-reactive metal particle fuel due to its superior ignition and combustion characteristics. In this work, a laser ignition testing sy...
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Course keeping control for very large ship using hyperbolic tangent function based on nonlinear decoration technique J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-05-13 Haochen Hong, Xianku Zhang, Zhongwen Huang
To solve the problems of difficult course keeping, high energy output, and large wear of very large ships under different sea conditions, a robust controller combining the closed-loop gain shaping algorithm and nonlinear decoration is proposed in this paper. Firstly, a linear controller is designed by using the third-order closed-loop gain shaping algorithm and takes the hyperbolic tangent function
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Naval engineering and ship control special edition editorial J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-04-18
Published in Journal of Marine Engineering & Technology (Ahead of Print, 2023)
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Review of maintenance strategies for ship machinery systems J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-04-12 Çağlar Karatuğ, Yasin Arslanoğlu, C. Guedes Soares
This study presents the state-of-art and future trends of the maintenance approaches to ship machinery systems. A systematic review process is conducted to identify relevant literature. Firstly, literature is examined by bibliometric analyses based on the determination of the distribution of papers by years, the top authors, papers, journals, and organisations. Then, studies in the literature are reviewed
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Ocean waves time-series generation: minimum required artificial wave time-series for wave energy converter analysis J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-04-08 Mohammad Reza Tabeshpour, Navid Belvasi
Ocean waves are complex, irregular, and random, making it difficult to produce definitive and repetitive time-series that represent oceans worldwide. Researchers have attempted to develop wave spec...
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A scaled wind turbine model-based aerodynamic testing apparatus for offshore floating wind turbines J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-02-23 Jiahuan Lin, Yangwei Wang, Huawei Duan, Yuanchang Liu, Jun Zhang
In marine applications, the scaled wind turbine model (SWTM) based aerodynamic testing apparatus is regarded as one of the most effective approaches to predict the aerodynamic performance of offsho...
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A model of maritime accidents prediction based on multi-factor time series analysis J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2023-01-18 Jinhui Wang, Yu Zhou, Lei Zhuang, Long Shi, Shaogang Zhang
Effective maritime accident prediction will benefit both maritime safety management and the insurance industry. Due to the complex non-linearity and non-stationarity nature of maritime accident data, its prediction is still a challenge in the research field. An autoregressive integrated moving average with explanatory variables (ARIMAX) model was proposed to predict maritime accidents accurately, and
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Consumption-reduced manual and automatic manoeuvring with conventional vessels J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-12-13 R. Damerius, A. U. Schubert, C. Rethfeldt, G. Finger, S. Fischer, G. Milbradt, M. Kurowski, M. Gluch, T. Jeinsch
Conventional ships are rarely the focus of research projects on autonomous shipping. Nevertheless, the shipping companies are very interested in reducing fuel consumption. This paper proposes a gradual approach towards ship automation which starts with the intelligent assistance of common manual steering by means of a Maneuver Assistance System (MAS). The MAS displays a manually improved manoeuvre
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An experimental study into the fault recognition of onboard systems by navigational officers J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-11-17 Jevon Philip Chan, Kayvan Pazouki, Rosemary A. Norman
Autonomy has allowed the maritime industry to design integrated systems leading to the concept of maritime autonomous surface ships. As research towards autonomous operations increases seafarers must be equipped with the knowledge of how to react to onboard system faults and threats to the safety of crew, vessel and cargo. Consequently, the maritime industry may utilise bridge simulators to train seafarers
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A design optimisation tool to minimise volume and failure rate of the modular multilevel converter and the thyristor-controlled rectifier J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-11-04 Tanvir Ahmed Toshon, M. O. Faruque
The unfolding of MVDC (Medium Voltage DC) systems has the prospects to enable the incorporation of power electronic converters with higher power density and reliability. A tool with an integrated design approach is required to minimise the overall system volume by identifying optimal components. In this paper, a component-level early-stage design tool has been developed to attain the minimum achievable
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Hardware in the loop experiments on the interaction between a diesel-mechanical propulsion system and a ventilating propeller J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-10-28 Lode Huijgens, Arthur Vrijdag, Hans Hopman
The interaction between ship propulsion machinery, propellers and the highly dynamic environment which is the sea is a complex yet highly relevant subject. During a storm, for example, waves and ship motions may cause the propeller to draw air, or ventilate, resulting in rapid changes in propeller thrust and load torque. These fluctuations propagate through the propulsion system, potentially causing
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Environmental status of the Danube commercial navigation: Serbia and the Danube border countries J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-10-28 Nataša Tomić-Petrović, Zoran Radmilović, Radoslav Rajković
The Danube navigation is geographically limited and subject to the effects of environmental change. On the other hand, the Danube commercial navigation is the point source of pollution with emissions of the Danube vessels and harbours, directly polluting the environment. The focus of this paper is the annual evaluation and calculation of air polluting emissions from fossil fuel consumption from the
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An ammonia supplying system using ammonium salt to reduce the NOx emissions of a 1.1 MW marine engine J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-09-26 Sang-Hee Woo, Hassan Raza, Won-Mo Kang, Sang Bom Choe, Myeong Hwan Im, Kyung Sun Lim, Jeong Gil Nam, Hongsuk Kim
A solid-SCR (selective catalytic reduction) system using ammonium carbamate (AC) was designed to improve NOx emission reduction efficiency and compensate for the shortcoming of the UWS (urea water solution)-SCR system applied to marine diesel engines. The solid-SCR system was installed on the exhaust line of a 1.1 MW engine for electric power generation in a ship, and its performance of emissions reduction
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Robust self-organising fuzzy sliding mode-based path-following control for autonomous underwater vehicles J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-09-13 G. V. Lakhekar, L. M. Waghmare
A robust self-organising fuzzy sliding mode control law steers autonomous underwater vehicles (AUVs) to track a predefined planar path at a constant speed without temporal specifications. An intelligent methodology has been adopted for path-following control to handle varying parametric uncertainties in vehicle dynamics and also conquers stringent preliminary condition constraints in several path-following
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A distributed object-oriented simulator framework for marine power plants with weak power grids J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-09-12 Stian Skjong, Eilif Pedersen
ABSTRACT In this work, we discuss and demonstrate how multi-engine marine power plants with weak power grids efficiently can be set up and simulated in a distributed co-simulation framework. To facilitate configuration switching such as starting and stopping, connecting and disconnecting arbitrary gensets online, the generator models are modelled as hybrid causality component models. This implementation
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Optimization procedures for a twin controllable pitch propeller of a ROPAX ship at minimum fuel consumption J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-08-11 M. Tadros, M. Ventura, C. Guedes Soares
A propeller optimization procedure is developed by coupling a propeller design tool with a nonlinear optimizer. An optimized propeller contributes toward maritime decarbonization and the mitigation of exhaust emissions from ships. The main objective of this optimization procedure is to select two ducted controllable pitch propellers from the Kaplan 19A series at the service speed for a roll-on/roll-off
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Cooling performance of modular fish hold for 30 gross-tonnage fishing vessel J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-07-03 Muhammad Arif Budiyanto, Fadhil Azharrisman, Achmad Fatchur Utama
This study analysed cooling performance in the fish holds of 30 gross tonnage fishing vessels to optimise the temperature distribution through the cargo volume in the fish hold. A field survey determined the calculation parameters and the fish hold's geometric design. The fluid flow characteristics and product cooling times were determined using a computational fluid dynamic simulation and a performance
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Techno-economic feasibility assessment model for integrating hybrid renewable energy systems into power systems of existing ships: A case study of a patrol boat J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-06-13 Isaac Animah, Patrick Adjei, Eli Kofi Djamesi
The shipping industry has set out to reduce CO2 emissions by 50% by 2050 compared to 2008, as op. cit. in the note by the International Maritime Organisation to the UNFCCC Talanoa Dialogue. In order to achieve this target, ship owners and operators are to consider replacing the conventional diesel generators and gas turbines with renewable energy and other cleaner power producing systems. In this paper
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The viability of retro-fitting a re-liquefaction plant onboard a 150,000m3 DFDE LNG carrier J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-05-17 Kenneth Gordon Montgomery, John Chudley
Changes in the type of LNG trading has resulted in an increased demand for vessels with greater operational flexibility and efficient propulsion plants. This has led to the demand for the capability to re-liquefy boil-off-gas (BOG) and return it the cargo-tanks and sell it as cargo or burn BOG or fuel oils depending on the relative costs at the time. This allows energy companies to divert LNG to markets
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Operational data-driven energy performance assessment of ships: the case study of a naval vessel with hybrid propulsion J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-04-27 N. I. Vasilikis, R. D. Geertsma, K. Visser
Ship designers hardly ever receive feedback from the actual operation of their designs apart from sea acceptance trials. Similarly, crews operating the vessels do not receive a clear picture of the energy performance and environmental footprint of different options. This paper proposes a methodology based on operational data from continuous monitoring, and applies it to an ocean patrol vessel of the
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Which eco-maintenance for renewable energy? A simulation model for optimising the choice of offshore wind farm maintenance vessel J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-03-02 Nicolas Tchertchian, Dominique Millet
In this paper the concept of eco-maintenance is presented. The concept aims to improve lifetime while minimising environmental impact over the entire life cycle to ensure maximum performance. Offshore wind farms are subjected to severe weather conditions, which limits the vessels capabilities to access the wind farms. The interest of this paper is the investigation of the optimal maintenance strategy
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A method to assess the impact of safe return to port regulatory framework on passenger ships concept design J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-02-08 A. Valcalda, D. de Koningh, A. Kana
The introduction of the ‘Safe Return to Port’ (SRtP) regulations strongly impacted the design of passenger ships. To meet the functional requirements of these regulations, the systems on board reached an extreme level of complexity in terms of redundancy and segregation, considerably increasing the difficulties to assess the compliance of the designs. However, non-compliant designs are a major risk
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Filtering based multi-sensor data fusion algorithm for a reliable unmanned surface vehicle navigation J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-02-01 Wenwen Liu, Yuanchang Liu, Richard Bucknall
When considering the working conditions under which an unmanned surface vehicle (USV) operates, the navigational sensors, which already have inherent uncertainties, are subjected to environment influences that can affect the accuracy, security and reliability of USV navigation. To combat this, multi-sensor data fusion algorithms will be developed in this paper to deal with the raw sensor measurements
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Digital engineering: expanding the advantage J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2022-01-12 J. M. Voth, G. H. Sturtevant
ABSTRACT Digital transformation – the pervasive incorporation of digital technology into virtually every process and system – is arguably the greatest force of change within the naval engineering community. Digital innovation is disrupting traditional ship design paradigms and giving rise to new ways of modernising and sustaining a future integrated force structure. This paper highlights digital transformation
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Integrating vulnerability analysis into the early stage distributed naval ship system design process J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-10-26 M. F. van Diessen, E. A. E. Duchateau, A. A. Kana, J. J. Hopman
ABSTRACT Vulnerability reduction measures are taken during the early stage distributed ship system design process to ensure the availability of the required systems in a damaged state. Traditionally these vulnerability reduction measures are based on design rules or best practices resulting from past experiences. Therefore, the measures are not per definition applicable for future warships, as both
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Analysis of unbalanced fault operating conditions of ship electric networks via Millman’s theorem J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-09-19 John Prousalidis
ABSTRACT The aim of this paper is in continuation with previous works of other authors, to demonstrate a methodology of analysing unbalanced operating conditions of ship electric energy systems via Millman’s theorem. Its advantages consist in being simple in implementation (either in time domain or in phasor mode) especially by non-electric power engineers, in contrast to the more complicated method
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Real-time prediction of propulsion motor overheating using machine learning J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-09-15 K. H. Hellton, M. Tveten, M. Stakkeland, S. Engebretsen, O. Haug, M. Aldrin
ABSTRACT Thermal protection in marine electrical propulsion motors is commonly implemented by installing temperature sensors on the windings of the motor. An alarm is issued once the temperature reaches the alarm limit, while the motor shuts down once the trip limit is reached. Field experience shows that this protection scheme in some cases is insufficient, as the motor may already be damaged before
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iWindCr field trial and electrochemical analysis for corrosion detection and monitoring offshore wind turbine’s MP-TP steel components J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-07-01 S. Simandjuntak, N. Bausch, A. Farrar, Juan Ahuir-Torres I, Bob Thomas, Joseph Muna
ABSTRACT A Proof-of-Concept (POC) low power-low current wireless sensor network (WSN) for corrosion detection and monitoring of offshore wind turbine (OWT)’s component, entitled iWindCr, has been developed and field trialled in one of the OWTs in the UK south region. This paper reports on the setting up and outcomes of this field trial. The trial has successfully demonstrated the working functionality
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Gas turbine performance enhancement for naval ship propulsion using wave rotors J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-05-31 Antonios Fatsis
The propulsion demands of high-speed naval vessels often rely on gas turbines, producing significant amount of power achieving thus high performance requirements. Gas turbines can be used either to provide purely mechanical propulsion, or alternatively to generate electricity, which is subsequently used by electric drives to propel the ship. However, the thermal efficiencies of gas turbines are lower
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Distributed adaptive power management for medium voltage ship power systems J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-03-05 Chris S. Edrington, Gokhan Ozkan, Behnaz Papari, Dallas Perkins
Systems are being developed for power distribution on future navy ships to effectively incorporate advanced electrical systems requiring DC power. These islanded DC microgrids provide new challenges to the management of power flow throughout the system, and thus require advanced controls to accurately regulate and stabilise the systems during changing operational conditions. Therefore, adaptive droop
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Effect of the cross-flow wake on the hydrodynamic performance of the HSP propeller by the CFD solver J. Mar. Eng. Technol. (IF 2.6) Pub Date : 2021-03-01 Jabbar Firouzi, Hassan Ghassemi, Karim Akbari Vakilabadi
This paper numerically presented the effect of the cross-flow wake on the hydrodynamic performance of the ship propeller. The propeller is a typical high skewed propeller (HSP) of the training ship ‘Seiun-Maru’, whose experimental data have been frequently used by many researchers. The viscous flow is solved by an incompressible Reynolds Averaged Navier–Stokes (RANS) method using Ansys-CFX solver.