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Journal articles on the topic 'Ship Power System'
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1
Yin, He, Hai Lan, Ying-Yi Hong, Zhuangwei Wang, Peng Cheng, Dan Li, and Dong Guo. "A Comprehensive Review of Shipboard Power Systems with New Energy Sources." Energies 16, no. 5 (February 27, 2023): 2307. http://dx.doi.org/10.3390/en16052307.
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A new energy ship is being developed to address energy shortages and greenhouse gas emissions. New energy ships feature low operational costs and zero emissions. This study discusses the characteristics and development of solar-powered ships, wind-powered ships, fuel cell-powered ships, and new energy hybrid ships. Three important technologies are used for the power system of the new energy ship: new-energy spatio-temporal prediction, ship power scheduling, and Digital Twin (DT). Research shows that new energy spatio-temporal prediction reduces the uncertainty for a ship power system. Ship power scheduling technology guarantees safety and low-carbon operation for the ship. DT simulates the navigational environment for the new energy ship to characterize the boundary of the shipboard’s new energy power generation. The future technical direction for new energy ship power systems is also being discussed.
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Bortnowska, Monika. "Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system." Polish Maritime Research 14, no. 4 (October 1, 2007): 24–30. http://dx.doi.org/10.2478/v10012-007-0036-7.
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Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system One of the crucial systems of sea mining ship for poly-metallic concretions is its motion control system (SMC). Power of such system depends on sea environment characteristics and main dimensions of the ship. It can be expected that it will have important influence on total power of the ship's power plant and in effect on the mining ship's dimensions. In this paper is presented one of the possible ways of preliminary estimation of design power of SMC system for sea mining ship. Since details of design solution of such system for the ship in question are unknown (ships of the kind have not been built so far) the presented results should be considered to be the first estimation of the order of the power demand.
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Bukar, Abba Lawan, Chee Wei Tan, Kwan Yiew Lau, and Ahmed Tijjani Dahiru. "Optimal planning of hybrid photovoltaic/battery/diesel generator in ship power system." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (September 1, 2020): 1527. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1527-1535.
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In line with the increasing concern on the pollution release by marine ships, renewable energy technologies in ships power system has received so much attention. Recently, photovoltaic (PV) and energy storage system (ESS) are been integrated into conventional diesel generator in ships power system Nevertheless, improper sizing of the overall ship power station will result in a high investment cost and increase CO<sub>2</sub> emission. This paper devised a methodology to compute the optimal size of the ESS, PV and diesel generator in a ship power system to minimize CO<sub>2</sub> emission, fuel cost, and investment cost. It is a well-known fact that power generation in a sailing ship depend on the time zone, local time, date, latitude, and longitude along ship navigation route and the condition of the ship power system also differs from power systems on land. The devised method in this paper takes into accounts the geographical and season variation of solar insolation along the route from Lagos (Nigeria) to Conakry (Guinea) and accurately model the power output of PV modules is along the route.
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Cheng, Peng, Ning Liang, Ruiye Li, Hai Lan, and Qian Cheng. "Analysis of Influence of Ship Roll on Ship Power System with Renewable Energy." Energies 13, no. 1 (December 18, 2019): 1. http://dx.doi.org/10.3390/en13010001.
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Renewable energy ship was regarded as one of the ship energy technologies with a good prospect. In order to study the application of solar and wind energy on ships in the marine environment and the impact of ship rolling on the system, the feasibility of applying solar energy and wind energy to ships was analyzed, and the structural composition of ship power system incorporating renewable energy source was studied. The model of the ship power system integrated with renewable energy was built in PSCAD/EMTDC simulation software. The layout of wind power generation system and photovoltaic power generation system was given for the actual ship, and the ship parameters and specific parameters of each simulation module were determined. It can be seen that the rolling of ship will cause fluctuations in the grid-connected power of the photovoltaic power generation system and the wind power generation system from the comparison of the simulation curves. Finally, a simulation experiment is provided to prove the access of the battery can well suppress the grid-connected power fluctuation caused by the rolling of the ship, which has an important impact on the stability of the ship power system with renewable energy.
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Zou, Yin Cai, and Wei Gang Zheng. "The Structure Design of Parent-Subsidiary Wind Sailing Boat and the Matching Research of Power Plant." Advanced Materials Research 912-914 (April 2014): 1032–36. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.1032.
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Wind sailing boat fades out maritime transport industry gradually, because of its existence decreases the ship stability, and threatens mariners and ships security vastly. Project group has worked out high stability and security ship through researching literature and emulation-technique. Through the design of a parent ship and a sub-shipa set of wind sailing system and a water supply and drainage system, and the modeling calculation and analysis about the thrust of the fixed pitch propeller matching with the sailing, we can conclude that the added sub-ships can enhance ships stability in constant speed sailing situation. So it can improve thrust and reduce fuel consumption through increasing the scale of wind sailing.
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Wang, Wenxuan, and WeifengShi. "Application of new power flow calculation in ship power system." Journal of Physics: Conference Series 2450, no. 1 (March 1, 2023): 012089. http://dx.doi.org/10.1088/1742-6596/2450/1/012089.
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Abstract A relevant mathematical model regarding the calculation of tidal currents in ship power systems is constructed for the actual situation of ship power systems. The nodal is used to verify the applicability of its method in the ship power system. The algorithm program for the ship power system using radiation networks is prepared using MATLAB, and the accuracy of the algorithm is verified by an example. Verification of ship power flow calculation and its stability by Newton method,which will greatly help to improve the operation of the ship’s electric power system.
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Wang, Yixue, Zhuoer Wang, and Qiang Peng. "Design of New energy ship power safety monitoring system based on Internet of things." E3S Web of Conferences 261 (2021): 01034. http://dx.doi.org/10.1051/e3sconf/202126101034.
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With the current technology of ship power battery and alternative fuel power system gradually mature, many countries have issued relevant policies to emphasize the promotion of ship new energy, while the current domestic ship related active safety system is still in the state of low automation, low intelligence and low integration. In this regard, the project introduces artificial intelligence algorithm to design a set of new energy ship power module monitoring system for fuel cell ships and pure electric ships, which can be used for marine power battery output management and safety monitoring, mainly including hydrogen fuel cell safety monitoring system, power battery (buffer cell) safety monitoring system and power integrated safety monitoring system. This work combines embedded technology with Internet of things technology and artificial intelligence algorithm to solve the safety management problem of new energy ship power system. If it is applied to the actual ship, obvious social and economic benefits can be achieved.
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Cheng, Peng, Ji Hui Li, and Hai Lan. "Modeling and PSCAD Simulation Analysis on a Ship Power System." Applied Mechanics and Materials 143-144 (December 2011): 58–62. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.58.
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As the rise both of the ships tonnage and the level of electrification heightened, the capacity of the ship power station has also been increased. Therefore, more large-capacity vessels generating units are used to satisfy the needs of the power system in the ship. This paper, by using the PSCAD simulation software, a dynamic simulation model of ship power system is established based on model elements such as prime mover, generators, control device, motor and the related load, based on which the defined load operating process is studied, and the steady state and dynamic performance of the ship power system are obtained. In order to energy saving and make full use of solar energy, in the ship power system, a photovoltaic device is used, and its output DC power is converted into the ship system using three-phase AC power by a inverter. For such a power system, the influences of addition of large-scale energy storage and new power supply equipments on ship power system are analyzed.
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Liu, Luyuan. "Design of the Comprehensive Monitoring System of Ro-Ro Ship Power Plant Based on LabVIEW." Journal of Physics: Conference Series 2254, no. 1 (April 1, 2022): 012037. http://dx.doi.org/10.1088/1742-6596/2254/1/012037.
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Abstract In this paper, using power machinery monitoring technology, testing technology, signal analysis and processing technology, combined with the characteristics of the dual-engine and double-propeller arrangement, carrying, complex waters and variable operating conditions of the power unit of the ro-ro ship, a set of virtual instruments is designed for the power of the ro-ro ship. Device integrated monitoring system. The system has a complete set of comprehensive monitoring system, which can monitor the power output working status of the power unit of the ro-ro ship. Under different working conditions, the system can collect and analyse signals through sensors, and automatically obtain information such as combustion work in the cylinder, gearbox gear transmission and meshing, shaft trajectory dynamic vibration and shaft power, and is a monitoring platform for marine power plants. The development and intelligent cabin provide technical support. The system realizes the automatic monitoring of ships, effectively improves the safety and reliability of ship operations, and reduces and avoids the occurrence of major accidents. At the same time, it has also completed the integration and digitization of ship power plant monitoring, providing support for decision-making in the use, operation and control, maintenance, and management of equipment and systems, effectively improving the safety and reliability of ship operations, and further promoting the development of smart ships and smart engine rooms.
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Chen, Yajie, Zhiqiang Pan, Ming Ni, Haibo Gao, Zhao Pan, He Huang, and Yihang Zhu. "Design of Marine High Power Wireless Charging System." E3S Web of Conferences 194 (2020): 02010. http://dx.doi.org/10.1051/e3sconf/202019402010.
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With the application of new energy ships equipped with large-capacity batteries/ultracapacitors in oceans, inland rivers and lakes, the need for high-power wireless charging systems has become increasingly urgent. Based on the analysis of the characteristics of ship charging operation, this paper selected the structure of loosely coupled transformer and introduces its core technology. Then the basic principle of the wireless charging system for the ship is introduced, and the scheme of 1.2 MWwireless charging system is designed according to the specific application.2.5
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Tsekouras, George J., Fotios D. Kanellos, and Michalis Kontosoros. "Sensitivity Analysis of Optimal Power Dispatch for All-Electric Ship." WSEAS TRANSACTIONS ON POWER SYSTEMS 16 (March 16, 2021): 22–40. http://dx.doi.org/10.37394/232016.2021.16.3.
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Shipping industry is reforming and changing fast, as the International Maritime Organization (IMO) works towards air pollution prevention and ship-owners pursue more efficient operation of their ships. Formerly, propulsion and electric load dispatch in ship power system is implemented proportionally with respect to nominal power of prime movers and generators respectively. Additionally, integrated full electric propulsion, optimal real-time dispatch to ship generators and the integration of new systems, such as energy storage systems, shaft generators etc. could have gained a wider application. In this paper the optimal dispatch for ship power system based on Lagrange method is presented comparing the classic and all-electric ship design. The developed method is applied to an ten years old Ro-Ro (roll on / roll off) passenger ship and an analytical sensitivity analysis is occurred out with respect not only to technical characteristics of the ship, such as fuel kind, propulsion chain factors, but also voyage characteristics, such as ship speed, route length etc.
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Tuswan, Tuswan, Saefulloh Misbahudin, Sony Junianto, Hartono Yudo, Ari Wibawa Budi Santosa, Andi Trimulyono, Ocid Mursid, and Deddy Chrismianto. "Current research outlook on solar-assisted new energy ships: representative applications and fuel & GHG emission benefits." IOP Conference Series: Earth and Environmental Science 1081, no. 1 (September 1, 2022): 012011. http://dx.doi.org/10.1088/1755-1315/1081/1/012011.
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Abstract Shipping industries, one of the efficient modes of freight transport for global trade, are now being forced to demonstrate environmental commitment to reduce greenhouse gas emissions progressively. Stakeholders in the maritime community have proposed various countermeasures and action plans, including applying new energy resources for the future development of ship powers. This paper introduces a comprehensive review to categorize the pathways and highlight the core technological concepts, technical issues, current applications, implementation barriers, and future outlooks regarding integrating new energy resources into ship power systems, including single solar-powered and hybrid new energy resources. Eco-friendly energy sources were promising energy savings and GHG emission benefits. Still, integrating new energy source generation systems would significantly depend on several critical factors. Because ships require a large surface area for installing PV panels, the utilization of solar-assisted power generation on large-scale boats is currently uncommon. The energy generated by the PV generating system is mostly utilized for lighting and electricity. Integrating new energy source generating systems with current ship power systems is a viable approach for enhancing energy efficiency will likely be the focus of future ship-based energy system research. Furthermore, due to the variety of applications, the ship type, power system structure, and navigation area should be considered while selecting a suitable new energy source.
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Ji, Zhendong, Zhihong Zhao, Jianhua Wang, and Zhipeng Lv. "A Flexible Control Strategy for Shore-to-Ship Power System in Terms of Grid-Connected and Off-Grid Switch." Polish Maritime Research 25, s2 (August 1, 2018): 139–48. http://dx.doi.org/10.2478/pomr-2018-0085.
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Abstract There are promising application prospects for applying the shore power technology to the ships in the port for the purpose of pollution prevention. However, the grid-connection of the shore power supply to the ship power grid leads to current surges, damages the ship power consumption equipment, and results in the instability of the ship power grid system, which will seriously affect the reliability of the operation of the ship power grid system. In order to address this problem, the mathematical model of virtual synchronous generator is introduced in this paper. Then, a control method for the flexible grid-connection of the shore power supply to the ship power grid based on the virtual synchronous generator is proposed. Next, the output characteristics of the shore power supply are optimized to match the characteristics of the ship generator, which contributes to the flexible grid-connection of the shore power supply to the ship power grid system. The effectiveness and the feasibility of this method are verified by simulation and experiments.
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Perčić, Maja, Nikola Vladimir, and Marija Koričan. "Electrification of Inland Waterway Ships Considering Power System Lifetime Emissions and Costs." Energies 14, no. 21 (October 28, 2021): 7046. http://dx.doi.org/10.3390/en14217046.
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This paper deals with the applicability of alternative power system configurations to reduce the environmental footprint of inland waterway ships. Its original contribution includes: models for assessment of the lifetime emissions and associated lifetime costs of alternative power system configurations for different types of inland waterway vessels, identification of the most cost-effective options for these vessels, and an estimation of the impact of emission policies on the profitability of each option. The case study considers the Croatian inland waterway sector, where three types of vessel with significantly different purposes, designs, and operative profiles are considered (cargo ship, passenger ship, and dredger). The technical and operational features of these ships are analyzed with an emphasis on their energy needs. Then, life-cycle assessments (LCAs) of a diesel engine-powered ship configuration and two battery-powered ship configurations (with and without a photovoltaic system) are performed by means of GREET 2020 software. These configurations are compared from the economical viewpoint, by the life-cycle cost assessment (LCCA), where potential carbon credit scenarios are investigated, while relevant quantities are converted into monetary units. Although the LCA identified the photovoltaic cells’ battery-powered ship configuration as the most environmentally friendly, according to the LCCA, its life-cycle costs are rather high, except for passenger ships, for which the battery-powered ship configuration is a feasible option. If a set of required specific input data is known, the presented procedure is applicable to reduce the environmental footprint of any other inland waterway fleet.
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Zhang, Hao, and Zeyu Zhang. "Design of the Power System and Remote Control System for the Unmanned Ship." Journal of Physics: Conference Series 2121, no. 1 (November 1, 2021): 012021. http://dx.doi.org/10.1088/1742-6596/2121/1/012021.
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Abstract In lakes and reservoirs with high environmental protection requirements, it is necessary to adopt pure electric intelligent water quality monitoring ships, adopt pure electric power systems and intelligent remote control systems. This article specifically completed the design of the power system and remote control system of the smart ship, and elaborated the design method in detail. The system has the characteristics of high reliability, miniaturization, and modularization. The successful development of the system has greatly improved the intelligence of water quality monitoring ships, and has a positive effect on small intelligent ships in lakes and reservoirs.
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Kim, Ye-Rin, Jae-Myeong Kim, Jae-Jung Jung, So-Yeon Kim, Jae-Hak Choi, and Hyun-Goo Lee. "Comprehensive Design of DC Shipboard Power Systems for Pure Electric Propulsion Ship Based on Battery Energy Storage System." Energies 14, no. 17 (August 25, 2021): 5264. http://dx.doi.org/10.3390/en14175264.
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With the strengthening of international environmental regulations, many studies on the integrated electric propulsion systems applicable to eco-friendly ship are being conducted. However, few studies have been performed to establish a guide line for the overall pure electric propulsion ship design. Therefore, this paper introduces the comprehensive design of DC shipboard power system for pure electric propulsion ship based on battery energy storage system (BESS). To design and configure the pure electric propulsion ship, 2 MW propulsion car ferry was assumed and adopted to be the target vessel in this paper. In order to design the overall system, a series of design processes, such as the decision of the ship operation profile, BESS capacity selection, configuration of the power conversion systems for propulsion, battery charging/discharging procedures, classification of system operation modes, and analysis of the efficiency, were considered. The proposed efficient design and analysis of the pure electric propulsion ship was qualitatively and quantitatively validated by MATLAB Simulink tool. The methodology presented in this paper can help design real ships before the system commissioning.
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Meler-Kapcia, Maria. "Algorithm for searching out similar ships within expert system of computer aided preliminary design of ship power plant." Polish Maritime Research 15, no. 3 (October 1, 2008): 92–96. http://dx.doi.org/10.2478/v10012-007-0089-7.
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Algorithm for searching out similar ships within expert system of computer aided preliminary design of ship power plant This paper presents an algorithm for searching out similar ships, implemented in a hybrid system for aiding preliminary design of ship power plant, based on new similarity functions as well as those adapted from literature sources. For searching out similar ships a multicriterial optimization method of weighed profits was applied.
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Yu, Chaochun, Liang Qi, Jie Sun, Chunhui Jiang, Jun Su, and Wentao Shu. "Fault Diagnosis Technology for Ship Electrical Power System." Energies 15, no. 4 (February 10, 2022): 1287. http://dx.doi.org/10.3390/en15041287.
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This paper proposes a fault diagnosis method for ship electrical power systems on the basis of an improved convolutional neural network (CNN) to support normal ship operation. First, according to the mathematical model of the ship electrical power system, the simulation model of the ship electrical power system is built using the MATLAB/Simulink simulation software platform in order to understand the normal working state and fault state of the generator and load in the power system. Then, the model is simulated to generate the fault response curve, and the picture dataset of the network model is obtained. Second, a CNN fault diagnosis model is designed using TensorFlow, an open-source tool for deep learning. Finally, network model training is performed, and the optimal diagnosis results of the ship electrical power system are obtained to realize structural parameter optimization and diagnosis. The diagnosis results show that the established simulation model and improved CNN can provide support for fault diagnosis of the ship electrical power system, improve the operation stability and safety of the ship electrical power system, and ensure safety of the crew.
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Kamiński, Piotr, and Wiesław Tarełko. "Management of assignment of operational tasks realized in ship power plant." Polish Maritime Research 15, no. 1 (January 1, 2008): 42–51. http://dx.doi.org/10.2478/v10012-007-0050-9.
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Management of assignment of operational tasks realized in ship power plant The frequent cause of ships' detentions by port authorities are abnormalities of ship power plant functioning. Each extended ship lay time in port results in waste of ship operating time thus costs rise to shipowners. This is connected with improper ship power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in managing of ship power plant. Such a system can be worked out on condition that mathematical formula which represents the decision - making process of an engineer has been built. The present work shows approache to the problem according to the situation in which the engineer is made to take certain decisions. In formulation of the most substantial operating states of a ship like lay time in harbour and sea voyage the ‘knapsack algorithm’ was applied. For both approaches objective function was formulated.
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Yan, Xuefan. "Integrated control method for electromagnetic compatibility of lift facility control system for naval craft." Journal of Physics: Conference Series 2296, no. 1 (June 1, 2022): 012013. http://dx.doi.org/10.1088/1742-6596/2296/1/012013.
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Abstract Lifting facilities electromechanical servo system has a compact structure, high specific power, high control accuracy, low vibration and noise, high reliability. In recent years, small and medium power electromechanical servo systems have been widely used in the aerospace field, and the application of distributed high-power electromechanical servo systems in the naval field to replace the traditional valve-controlled centralized ship-wide hydraulic servo system has a broad application prospect, becoming one of the important links to achieve a new generation of "all-electric" ships. But along with the power level, electromechanical servo system electromagnetic compatibility problems are increasingly prominent, and must be considered from the system design in a comprehensive manner. This paper takes a ship electromechanical servo system as an example, starts from the system functional unit, combines the ship and servo system electromagnetic environment characteristics, sorts out the key links of each unit electromagnetic compatibility control, and takes targeted measures in the electromagnetic compatibility design, the product finally passed the electromagnetic compatibility test, which can provide reference for electromechanical servo system electromagnetic compatibility design.
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German-Galkin, Sergey, and Dariusz Tarnapowicz. "Energy Optimization of the ‘Shore to Ship’ System—A Universal Power System for Ships at Berth in a Port." Sensors 20, no. 14 (July 8, 2020): 3815. http://dx.doi.org/10.3390/s20143815.
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One of the most effective methods of limiting air pollution emissions by ships at a berth in a port is the power connection of ships to the on-shore system. “Shore to Ship” (STS)—A universal system for the connection of the ship’s electrical power network with the on-shore network—ensures the adoption of the voltage and frequency of the on-shore network for the exploitation of various types of ships in the port. The realization of such a system is possible due to the use of semiconductor technologies during the construction of mechatronic systems (i.e., systems that ensure the maintenance of electricity parameters). The STS system ensures energy efficiency for high-power ship systems through the use of an active semiconductor converter. This article presents an analysis of steady state electromagnetic and energy processes, allowing the determination of the active and reactive power and losses in the STS system. The presented analytical research enables the development of a control algorithm that optimizes the system energy efficiency. In the article, the control methods allowing the optimization of the energy characteristics of the system are considered and investigated. On the basis of theoretical studies, a model was developed in the Matlab-Simulink environment, which allowed us to study steady and transient processes in the STS system in order to reduce losses in power lines and semiconductor converters.
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Stamatakis, Michael E., and Maria G. Ioannides. "State Transitions Logical Design for Hybrid Energy Generation with Renewable Energy Sources in LNG Ship." Energies 14, no. 22 (November 22, 2021): 7803. http://dx.doi.org/10.3390/en14227803.
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In terms of energy generation and consumption, ships are autonomous and isolated power systems with energy requirements related to the type and kind of power demands and according to ship types: passenger ships, or commercial ships. Power supply on ships is traditionally based on engines thermal generators, which use fossil fuels, diesel, or natural gas. Due to the continuous operation of thermal generators in ships, this ends up increasing polluting gas emissions for the environment, mainly CO2. A combination of Renewable Energy Sources (RES) with traditional ship thermal engines can reduce CO2 emissions, resulting in a ‘greener’ interaction between ships and the environment. Due to the varying power needs for ship operation, considering the varying nature of load demands during long distance travels and during harbor entry, the use of RES must be evaluated. This paper presents a new control method to balance LNG ship load demands and power generation from RES, based on an accurate model and solution in real conditions. The Energy Management System (EMS) is designed and implemented in a Finite State Machine structure using the logical design of state transitions. The results prove that the reduction of consumption of fossil fuels is feasible, and, if this is combined with RES, it reduces CO2 emissions.
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Perčić, Maja, Nikola Vladimir, Ailong Fan, and Ivana Jovanović. "Holistic Energy Efficiency and Environmental Friendliness Model for Short-Sea Vessels with Alternative Power Systems Considering Realistic Fuel Pathways and Workloads." Journal of Marine Science and Engineering 10, no. 5 (April 30, 2022): 613. http://dx.doi.org/10.3390/jmse10050613.
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Energy requirements push the shipping industry towards more energy-efficient ships, while environmental regulations influence the development of environmentally friendly ships by replacing fossil fuels with alternatives. Current mathematical models for ship energy efficiency, which set the analysis boundaries at the level of the ship power system, are not able to consider alternative fuels as a powering option. In this paper, the energy efficiency and emissions index are formulated for ships with alternative power systems, considering three different impacts on the environment (global warming, acidification, and eutrophication) and realistic fuel pathways and workloads. Besides diesel, applications of alternative powering options such as electricity, methanol, liquefied natural gas, hydrogen, and ammonia are considered. By extending the analysis boundaries from the ship power system to the complete fuel cycle, it is possible to compare different ships within the considered fleet, or a whole shipping sector, from the viewpoint of energy efficiency and environmental friendliness. The applicability of the model is illustrated on the Croatian ro-ro passenger fleet. A technical measure of implementation of alternative fuels in combination with an operational measure of speed reduction results in an even greater emissions reduction and an increase in energy efficiency. Analysis of the impact of voluntary speed reduction for ships with different power systems resulted in the identification of the optimal combination of alternative fuel and speed reduction by a specific percentage from the ship design speed.
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Kim, Kyunghwa, Juwan An, Kido Park, Gilltae Roh, and Kangwoo Chun. "Analysis of a Supercapacitor/Battery Hybrid Power System for a Bulk Carrier." Applied Sciences 9, no. 8 (April 14, 2019): 1547. http://dx.doi.org/10.3390/app9081547.
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Concerns about harmful exhaust emissions from ships have been an issue. Specifically, the emissions at ports are the most serious. This paper introduces a hybrid power system that combines conventional diesel generators with two different energy storage systems (ESSs) (lithium-ion batteries (LIB) and supercapacitors (SC)) focused on port operations of ships. To verify the proposed system, a bulk carrier with four deck cranes is selected as a target ship, and each size (capacity) of LIB and SC is determined based on assumed power demands. The determined sizes are proven to be sufficient for a target ship through simulation results. Lastly, the proposed system is compared to a conventional one in terms of the environmental and economic aspects. The results show that the proposed system can reduce emissions (CO2, SOX, and NOx) substantially and has a short payback period, particularly for ships that have a long cargo handling time or visit many ports with a short-term sailing time. Therefore, the proposed system could be an eco-friendly and economical solution for bulk carriers for emission problems at ports.
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Белей, В. Ф., М. С. Харитонов, and Р. О. Брижак. "Power quality improvement recommendations for shipboard power systems." MORSKIE INTELLEKTUAL`NYE TEHNOLOGII), no. 4(50) (December 17, 2020): 55–61. http://dx.doi.org/10.37220/mit.2020.50.4.073.
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В настоящее время на судах и объектах морской индустрии широко внедряется энергосберегающее электрооборудование, что позволяет добиться резкого снижения расхода электроэнергии и массогабаритных показателей оборудования, существенно расширяет функциональные возможности электротехнических комплексов и систем, приводит к улучшению эксплуатационных характеристик. Однако использование новейших энергосберегающих технологий, основанных на нелинейных элементах, и коммутация электрооборудования приводит к ухудшению качества электрической энергии в судовой электроэнергетической системе. В то же время, растет число потребителей, предъявляющих к качеству электроэнергии повышенные требования. В итоге, работа судовых энергокомплексов может отличаться от расчетной, а в ряде случаев становится аварийной. В работе приведены результаты экспериментальных исследований показателей качества электрической энергии в судовой электроэнергетической системе учебного парусного судна «Крузенштерн». Представлены результаты лабораторных исследований на физической модели судовой электростанции с источниками электромагнитных помех, обоснованы организационные и технические решения по снижению уровня электромагнитных помех в судовых электроэнергетических системах. Nowadays, energy-saving electrical equipment is widely introduced on ships and maritime industry facilities. It leads to a decrease in power consumption, weight and dimensions of equipment, significantly expands the functionality of electrical complexes and systems, and provides improvement of operational characteristics. However, the use of the latest energy-saving technologies based on non-linear elements and the switching of electrical equipment leads to a deterioration in the quality of electrical energy in the ship's electric power system. At the same time, the number of consumers with increased requirements for the quality of electricity is growing. As a result, the operation of ship power complexes may differ from the normal one, and in some cases it becomes emergency. The paper presents the results of experimental studies of electric power quality indicators in the ship's electric power system of the sail training ship "Kruzenshtern". The results of laboratory studies on a physical model of a ship power plant with sources of electromagnetic interference are presented, organizational and technical solutions to reduce the level of electromagnetic interference in ship power systems are substantiated.
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Bao, Xianqiang, Xinghua Xu, Yan Zhang, Yiyong Xiong, and Chengya Shang. "Optimal Sizing of Battery Energy Storage System in a Shipboard Power System with considering Energy Management Optimization." Discrete Dynamics in Nature and Society 2021 (July 12, 2021): 1–12. http://dx.doi.org/10.1155/2021/9032206.
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Due to the increasing concerns about the environmental and economic issues of traditional ships, all-electric ships with energy storage and renewable energy integration have become more and more appealing for the forthcoming future. In this paper, an optimal energy storage system (ESS) capacity determination method for a marine ferry ship is proposed; this ship has diesel generators and PV panels. ESSs sizing optimization and power system scheduling optimization are simultaneously conducted and it is converted to a mixed-integer quadratic programming (MIQP) model with special modeling techniques. The case study shows that the proposed method is flexible and effective, and the relationships between the ESSs size and the discharge rate, life cycle times, or initial investment cost are investigated.
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Jiang, H., C. H. Peng, and J. Xiao. "Reliability analysis for the power system of the nuclear ship Savannah." Journal of Physics: Conference Series 2208, no. 1 (March 1, 2022): 012003. http://dx.doi.org/10.1088/1742-6596/2208/1/012003.
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Abstract The power system, including the power transmission, distribution, and support system, is one of the largest and most complex systems established by humans. In addition to the normal considerations of power plants on board, the design of nuclear power merchant ships is also based on the need for uninterruptible power supplies. Based on the relevant data of the nuclear power ship “Savannah,” the qualitative and quantitative analysis is performed using the fault tree analysis method to analyze the reliability of its power system. The probability of basic events in certain accident conditions is evaluated according to the literature survey. In addition, this study also examines the common cause failure of diesel generators in the power system, as well as the analysis of sensitivity and importance of basic events. The installation of primary, auxiliary, and emergency power stations, the use of automated equipment for generator synchronization and power conversion, and the application of special internal communication and alarm systems unique to nuclear-powered ships can effectively eliminate the possibility of complete power outages for Savannah.
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Wang, Zhifang, Zixuan Yang, and Shuming Xiao. "Research on Energy Efficiency Design Index Calculation Method for the Hybrid Ship." Journal of Physics: Conference Series 2029, no. 1 (September 1, 2021): 012087. http://dx.doi.org/10.1088/1742-6596/2029/1/012087.
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Abstract The Marine Energy Efficiency Design Index (EEDI) is recognized as an effective tool to measure the level of carbon emissions from ships at home and abroad. It will play an important role in the assessment of carbon emissions from the shipping industry, especially under the current and future development goal of carbon neutrality. Various green technologies to reduce the carbon emissions of ships have been demonstrated and applied. Hybrid power system is one of them. Compared with traditional direct propulsion, it can significantly reduce the energy consumption and carbon emissions of ships in inland waters such as the Yangtze River. Based on the characteristics of the hybrid power system, this paper firstly analyzes the power types of the hybrid power system during ship navigation. Then, according to the principle and elements of EEDI calculation method, it puts forward the key problems that should be solved in ship EEDI calculation of hybrid power system. Then, according to different hybrid operation modes, it also puts forward the calculation method of EEDI of each power mode and the calculation method of acquired EEDI of hybrid ship. Finally, the calculation and analysis of a 7500DWT hybrid bulk carrier show that the EEDI calculation method for hybrid ships proposed in this paper is scientific and reasonable.
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Zeng, Xiangming, and Mingzhi Chen. "A Novel Big Data Collection System for Ship Energy Efficiency Monitoring and Analysis Based on BeiDou System." Journal of Advanced Transportation 2021 (August 4, 2021): 1–10. http://dx.doi.org/10.1155/2021/9914720.
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The call for green shipping is increasing, and the reduction of greenhouse gas emissions from ships becomes more and more important. Traditional ship energy efficiency monitoring is based on the noon reports, which are susceptible to human error and have a time delay. Many ship energy efficiency monitoring systems have been designed and developed, but they usually cannot send data to the shore in time. In order to identify abnormal fuel consumption in time, this paper realizes a big data collection system for ship energy efficiency monitoring based on the BeiDou System. The system installed on two sister container ships has already collected a lot of data. Big data analysis methods, such as principal component analysis (PCA) and correlation analysis, are applied in the system to realize data visualization and analysis. Using PCA, it turns out that the shaft power of the main engine is related to a certain ship speed, which is also affected by load and weather conditions, and is the biggest factor in determining fuel consumption. To realize the assessment of hull fouling and the optimization of ship trim, a useful physics-based analysis is proposed. The analysis shows that the fouling of ship body greatly increases its resistance. Our analysis method can also find the best trim under specific loading condition. All these points are important for reducing fuel consumption and improving ship efficiency.
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Wang, Zheng, Li Xia, Yongji Wang, and Lei Liu. "Fault Diagnosis System Based on Multiagent Technique for Ship Power System." Mathematical Problems in Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/370246.
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Fault diagnosis system of ship power system can assist the crew to deal with faults, shorten the processing time, and prevent faults expanding. Multiagent technique is adopted for the fault diagnosis system. Ship power system is divided into several feeder units. Each one is abstracted as a regional feeder agent (FED-Agent). A multiagent fault diagnosis system is established with FED-Agent and other functional agents. Considering of the characteristics of agent, the multiagent system processes both autonomy and interactivity. It can solve fault diagnosis problem of ship power system effectively.
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Zeńczak, Wojciech, and Agata Krystosik Gromadzińska. "Preliminary Analysis of the Use of Solid Biofuels in a Ship’s Power System." Polish Maritime Research 27, no. 4 (December 1, 2020): 67–79. http://dx.doi.org/10.2478/pomr-2020-0067.
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Abstract This paper presents the results of applying ennobled solid biomass via mechanical compaction or torrefaction as fuel for ships, in terms of fire safety, environmental protection, the increase in liquid fuel prices and the dwindling resources of crude oil. The object of investigation is a ship of the ro-pax ferry type, with low cruising range, which is intended for service on the Baltic Sea. The ship’s power system is discussed and the results of calculations of the thermal cycle for a steam turbine power plant are presented. We present a simplified comparative analysis of a fuel bunker for a ship with a power plant including biomass fired boilers, and for a ship with a conventional solution of a motor power plant supplied by ultra-low sulphur fuel originating from crude oil. The advantages of applying a fluidised bed biomass fired boiler are highlighted, and selected results from tests of this boiler are presented. In addition, we assess potential fire hazards on the ship resulting from the storage and transport of pellets, and from pellets after torrefaction.
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V. Spyropoulos, Dionysios, and Epaminondas D. Mitronikas. "A Review on the Faults of Electric Machines Used in Electric Ships." Advances in Power Electronics 2013 (March 5, 2013): 1–8. http://dx.doi.org/10.1155/2013/216870.
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Electric propulsion systems are today widely applied in modern ships, including transport ships and warships. The ship of the future will be fully electric, and not only its propulsion system but also all the other services will depend on electric power. The robust and reliable operation of the ship’s power system is essential. In this work, a review on the mechanical and electrical faults of electric machines that are used in electric ships is presented.
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Kurniawan, Akhmad Reinaldy, Adi Kurniawan, Sardono Sarwito, Ahlur Roi Novanto Gumilang, and Firman Budianto. "Power flow analysis of DC distribution system in a ship with non-electric propulsion." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 1 (February 1, 2023): 9. http://dx.doi.org/10.11591/ijece.v13i1.pp9-16.
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<span lang="EN-US">Direct current (DC) shipboard power distribution system offers higher power efficiency and voltage stability compared to the alternating current (AC) systems due to lower impedance. The implementation of DC distribution system in all-electric ship seems to be worthy since the reduction of power loss and voltage drop could overcome the drawback of DC system. However, the effectiveness of DC distribution system in ship with non-electric propulsion has not been investigated yet. Unlike in an all-electric ship, electric power flow in the distribution system of a ship with mechanic propulsion is considerably lower. The study aims to provide numerical analysis of power loss and voltage drop reduction on DC distribution system that applied to a ship with mechanic propulsion. The power flow analysis is performed on a tanker ship. Contrary to the hypothesis, the results show that the DC power distribution increase the power losses about 15% compared to AC system due to the addition of rectifier and inverter. However, the voltage drops are decreased in DC distribution system. Further investigation in the other aspects should be performed before concludes whether DC distribution system is worthy to be used in the aforementioned ship.</span>
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Hu, Wenqing, Qianming Shang, Xiangrui Bian, and Renjie Zhu. "Energy management strategy of hybrid energy storage system based on fuzzy control for ships." International Journal of Low-Carbon Technologies 17 (December 29, 2021): 169–75. http://dx.doi.org/10.1093/ijlct/ctab094.
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Abstract Lithium-ion batteries have high-energy density, but they cannot respond quickly to power fluctuations; supercapacitors (SCs) can quickly respond to power fluctuations, but their energy density is low. The hybrid energy storage system (HESS) that uses both lithium-ion batteries and SCs can take into account the advantages of both, making the system perform better; however, the energy distribution between lithium-ion batteries and SC is difficult. This paper takes ships as the research object, analyzes the power changes of ships during operation, and finds that high-power fluctuations are always only a minority. This paper uses a fuzzy control strategy, based on the actual operating conditions of the ship, except that the ship’s power fluctuation is very small; the SC will provide energy for the ship to make full use of the SC instead of waiting for the arrival of high-power fluctuations. This paper builds an experimental platform and uses the Arbin tester to simulate the operation of the ship. The experimental data show that the SC can have enough time to adjust its state of charge to deal with the power fluctuations at the next moment even if it keeps charging and discharging. The research results of this paper have certain significance for the energy distribution and capacity configuration of HESS.
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Yang, Shuangqi. "Research on Design, Detection and Realization of Monitoring System Based on Ship Power Grid Parameter." Journal of Physics: Conference Series 2023, no. 1 (September 1, 2021): 012048. http://dx.doi.org/10.1088/1742-6596/2023/1/012048.
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Abstract The power system of the ship is closely related to the it’s shipping, production and operation, navigation and communication, daily life and other subsystems, and has a very important impact on the operation of the ship. Due to the characteristics of the micro-grid of the ship and the use of a large number of power electronic equipment, the reliability of the power system of the ship is reduced, and the power quality of the power grid continues to decline. This paper studies the power parameter monitoring of the ship’s power grid, and designs a power parameter monitoring system for the ship’s power grid, which can monitor the power parameters of the ship’s power grid in real time. It is helpful to master the operation of the ship power system, and plays a positive role in improving the power quality of the ship power grid, and ensuring the safety and economic operation of the ship power system.
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Shi, Yaqi, and Wei Luo. "Application of Solar Photovoltaic Power Generation System in Maritime Vessels and Development of Maritime Tourism." Polish Maritime Research 25, s2 (August 1, 2018): 176–81. http://dx.doi.org/10.2478/pomr-2018-0090.
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Abstract The use of new energy generation technologies such as solar energy and electric propulsion technologies to form integrated power propulsion technology for ships has become one of the most concerned green technologies on ships. Based on the introduction of the principles and usage patterns of solar photovoltaic systems, the application characteristics of solar photovoltaic systems and their components in ships are analyzed. The important characteristics of the marine power grid based on solar photovoltaic systems are explored and summarized, providing a basis for future system design and application. Photovoltaic solar cells are made using semiconductor effects that convert solar radiation directly into electrical energy. Several such battery devices are packaged into photovoltaic solar cell modules, and several components are combined into a certain power photovoltaic array according to actual needs, and are matched with devices such as energy storage, measurement, and control to form a photovoltaic power generation system. This article refers to the basic principle and composition of the land-use solar photovoltaic system, and analyzes the difference between the operational mode and the land use of the large-scale ocean-going ship solar photovoltaic system. Specific analysis of large-scale ocean-going ship solar photovoltaic system complete set of technical route, for the construction of marine solar photovoltaic system to provide design ideas.
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Wang, Zheng, Li Xia, Yongji Wang, and Lei Liu. "Multiagent and Particle Swarm Optimization for Ship Integrated Power System Network Reconfiguration." Mathematical Problems in Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/280345.
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Ship integrated power system adopts electric power propulsion. Power network and electric power network are integrated into complicated one. Network reconfiguration of ship integrated power system is a typical nonlinear optimization that is multitarget and multiconstraint. According to the characteristics of ship integrated power system, simplified network model and reconfiguration mathematical model are established. A multiagent and particle swarm optimization is presented to solve network reconfiguration problem. The results of simulation show that multiagent and particle swarm optimization can reconfigure ship integrated power system efficiently.
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Yang, Rui, Wei Zhang, Rong Fan, and Qun Gu. "Standard Technical Research of Shore-to-Ship Power Supply System." Advanced Materials Research 998-999 (July 2014): 549–52. http://dx.doi.org/10.4028/www.scientific.net/amr.998-999.549.
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Based on the analysis of present situation of anchored ship shore-to-ship power supply system, the contents and focus problems of engineering construction industry standard are described. In the shore-to-ship power supply system development process the power consumption load, power supply plan and grounding techniques are analyzed and explained as well.
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Hu, Liang Deng, Chi Sun, Zhi Hua Zhao, and Yu Lin Chen. "Design of Control Console for Vessel Integrated Power Propulsion Subsystem." Advanced Materials Research 846-847 (November 2013): 347–54. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.347.
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This The integrated power system (IPS) to be used in future ships will be a big leap in the building of ship power platforms, representing the prospective direction of in the development of ship power systems. A centralized control console with PLC(Programmable Logic Control) and touch screen has been designed for the propulsion subsystem of the vessel integrated power system. The centralized control console is mainly used to monitor the operations of the propulsion motor and propulsion inverter and to make remote control communications with the propulsion display and control console of energy management. This paper has made a detailed description of its hardware, software and communication, and given full account of the PLC program as well as the process of the start-up, speed regulation and shutdown performed by the propulsion subsystem under local or remote control. The site tests prove that the designed centralized control console can effectively monitor the running conditions of the propulsion subsystem and improve the digitalization, intelligent capability, stability and reliability of the vessel integrated power system, which will be of reference value to the research on ship automatic management and long-distance monitoring.
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Park, Do-Young, and Jin-Seok Oh. "Smart Power Management System for Leisure-ship." Journal of Navigation and Port Research 35, no. 9 (December 31, 2011): 749–53. http://dx.doi.org/10.5394/kinpr.2011.35.9.749.
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Koenhardono, ES, DP Putri, and IR Kusuma. "Application of Hybrid Power Generation System on a Tanker Ship to Support the Development of Eco Ship Technology." IOP Conference Series: Earth and Environmental Science 1081, no. 1 (September 1, 2022): 012053. http://dx.doi.org/10.1088/1755-1315/1081/1/012053.
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Abstract The equator divides Indonesia into two parts, the areas located in North Latitude and South Latitude. This results in Indonesia having an abundant source of solar energy. Therefore, the use of hybrid power generation systems (solar cells and diesel generators) on ships can reduce generator fuel consumption, as well as reduce exhaust emissions from ships. This paper discusses the design of a hybrid power generation system on a tanker technically and economically. The total capacity of the solar panels installed on the ship can generate electrical energy of 885.2 kWh in a day. This electrical energy is used to supply electrical loads consisting of lighting, navigation equipment, radio communication, galley and laundry equipment, and air conditioner and refrigerator. The application of hybrid power plants on tankers can produce fuel consumption savings of 15.5% per year when compared to the use of conventional power generation systems. Meanwhile, the break event points due to the use of a hybrid generating system is less than 4 years or equivalent to the nominal total cost of Rp. 23,980,000,000.00 or $ 1,803,007.52.
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Su, Wen Hai, and Ji Hai Jiang. "Direct Drive Volume Control Electro-Hydraulic Servo Ship Rudder." Key Engineering Materials 439-440 (June 2010): 1388–92. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.1388.
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Direct drive volume control（DDVC）electro-hydraulic servo system has synthesized the advantages of high power of hydraulic system and flexible control of the motor. It also has other features such as energy saving, high efficiency, small bulk and high reliability. On the background for application to the ship steering system, DDVC electro-hydraulic servo system for the control actuator of ship is designed and the mathematic model is made and simulated with Matlab/Simulink. The steering gears closed-loop system’s simulation obtained the perfect dynamic performances; verify the correctness of the design with its control strategy. It can satisfy the ships request of boat to steering gears system and the DDVC electro-hydraulic servo system will be a extensive prospective power equipment of the control actuator of ship in future.
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Kim, Youngmin, Kyung-Won Jeon, and Sang-Yong Jung. "Power Management System Simulator Modeling and Characteristics Analysis for Electric Propulsion Ship." Transactions of The Korean Institute of Electrical Engineers 64, no. 6 (June 1, 2015): 878–84. http://dx.doi.org/10.5370/kiee.2015.64.6.878.
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Peng, Xin, Hui Chen, and Cong Guan. "Energy Management Optimization of Fuel Cell Hybrid Ship Based on Particle Swarm Optimization Algorithm." Energies 16, no. 3 (January 29, 2023): 1373. http://dx.doi.org/10.3390/en16031373.
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In order to optimize the energy management strategy and solve the problem of the power quality degradation of fuel cell hybrid electric ships, a particle swarm optimization algorithm based energy management strategy is proposed in this paper. Taking a fuel cell ship as the target ship, a system simulation model is built in Matlab/Simulink to verify the proposed energy management strategy. Through simulations and comparisons, the bus voltage curve of the optimized hybrid power system fluctuates more gently, and the voltage sag is smaller. The amplitude of the voltage fluctuation under maneuvering conditions is reduced by 55% compared with that of the original ship. The charging and discharging process of the composite energy storage system is optimized under maneuvering conditions, the power quality of the marine power grid is improved, and the use of the energy management strategy can extend the service life of the battery.
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Tarnapowicz, Dariusz, and Sergiej German-Galkin. "International Standardization in the Design of “Shore to Ship” - Power Supply Systems of Ships in Port." Management Systems in Production Engineering 26, no. 1 (March 1, 2018): 9–13. http://dx.doi.org/10.2478/mspe-2018-0001.
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Abstract The decisive source of air pollution emissions in ports is the berthed ships. This is primarily caused by the work of ship’s autonomous generator sets. One way of reducing the air pollution emissions in ports is the supply of ships from electricity inland system. The main problem connected with the power connection of ships to the inland network is caused by different values of levels and frequencies of voltages in these networks (in various countries) in relation to different values of levels and frequencies of voltages present in the ship’s network. It is also important that the source power can range from a few hundred kW up to several MW. In order to realize a universal „Shore to Ship” system that allows the connection of ships to the electricity inland network, the international standardization is necessary. This article presents the current recommendations, standards and regulations for the design of „Shore to Ship” systems.
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Yuan, Yupeng, Tianding Zhang, Boyang Shen, Xinping Yan, and Teng Long. "A Fuzzy Logic Energy Management Strategy for a Photovoltaic/Diesel/Battery Hybrid Ship Based on Experimental Database." Energies 11, no. 9 (August 23, 2018): 2211. http://dx.doi.org/10.3390/en11092211.
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Energy management strategy is a key technology of hybrid power ships. In recent years, renewable energy ship technologies have become a popular research field and one promising development direction to realize reasonable utilization of energy resource, as well as energy conservation and emission reduction. Among these technologies, the solar energy hybrid ship technology is currently attracting attention all over the word. In this paper, a 5000-car space solar energy hybrid ship is used as the research objective, and an energy management strategy that is based on fuzzy logic is proposed to distribute the ship power generation, solar energy, and battery output power according to the ship’s electrical load demand, and the fuzzification and stochasticity of solar energy. By comparing the simulation results with real ship testing results, it is identified that the proposed fuzzy logic energy management strategy can optimize the operation conditions of individual power generation sources, improve the overall performance of power system, and reduce the ship’s overall fuel consumption.
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Chen, Ching-Jin, Chun-Lien Su, Jen-Hao Teng, and Mahmoud Elsisi. "Feeder Losses Analysis of Marine Vessel Power Systems: A Case Study of Container Ship Power Loss Analysis Using Newton–Raphson Method." Energies 15, no. 23 (December 3, 2022): 9175. http://dx.doi.org/10.3390/en15239175.
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Load survey has become a routine project for shipbuilding and shipping companies to investigate electrical load characteristics to enhance the power system planning and operation of marine vessels. In this brief perspective, we will outline a few steps to feeder losses analysis based on the result conducted by the load survey. The power flow and feeder loss analysis are extracted and used to determine the critical parameters that can significantly affect the system feeder losses used in the electrical load analysis in new ships. Exploring this new research direction will provide a more thorough understanding of feeder losses in marine vessel power systems. In this paper, a case study of container ship power loss analysis using the Newton–Raphson method is presented. The analysis results can provide shipbuilding corporations and ship owners with useful information for planning, designing, operating, and controlling shipboard power systems. As an energy-saving measure for ship microgrids, the frequency converters are widely used by shipyards for seawater and freshwater cooling systems and heating, ventilation, and air conditioning (HVAC) systems, so that these systems can adjust the speed of the motor according to the actual demand of the load, so as to avoid full-load operation during the motor operation. With the proposed method, other measures, such as battery energy storage systems and energy-saving lighting equipment based on LEDs, are also utilized for shipboard power demand management.
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Pu, Songcheng, Yumin He, Qijiang Yang, Ming Cheng, Yupeng Wang, Zheng Wang, and Yaodi Lin. "Study on dynamic characteristics of rotor-bearing system under pitching condition." Journal of Physics: Conference Series 2113, no. 1 (November 1, 2021): 012021. http://dx.doi.org/10.1088/1742-6596/2113/1/012021.
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Abstract In many cases, ships will encounter special conditions, such as bad sea conditions, and the effect of various disturbance factors, such as wind and waves, will cause low-frequency longitudinal and transverse rocking motion of ships. This would affect the rotor-bearing system of the power plant, which is directly attached to the hull of the ship, and would roll along with the hull in the same longitudinal and transverse motion. This will have a significant impact on the stability of the rotor bearing system of the ship power plant and the safety of the ship. In this paper, a rotor-bearing test rig is mounted on a multi-degree-of-freedom swing test rig simulating sea conditions. The multi-degree-of-freedom rocking test bed simulates sea conditions. The rotor-bearing test bed is equipped with an eddy current sensor and an acceleration sensor to obtain experimental data. The programmable loader is used to control the rotor speed so as to carry out the experiment process at different speeds. Finally, the dynamic characteristics of rotor-bearing system under swinging condition are obtained.
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Bolbot, Victor, Gerasimos Theotokatos, Rainer Hamann, George Psarros, and Evangelos Boulougouris. "Dynamic Blackout Probability Monitoring System for Cruise Ship Power Plants." Energies 14, no. 20 (October 13, 2021): 6598. http://dx.doi.org/10.3390/en14206598.
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Stringent environmental regulations and efforts to improve the shipping operations sustainability have resulted in designing and employing more complex configurations for the ship power plants systems and the implementation of digitalised functionalities. Due to these systems complexity, critical situations arising from the components and subsystem failures, which may lead to accidents, require timely detection and mitigation. This study aims at enhancing the safety of ship complex systems and their operation by developing the concept of an integrated monitoring safety system that employs existing safety models and data fusion from shipboard sensors. Detailed Fault Trees that model the blackout top event, representing the sailing modes of a cruise ship and the operating modes of its plant, are employed. Shipboard sensors’ measurements acquired by the cruise ship alarm and monitoring system are integrated with these Fault Trees to account for the acquired shipboard information on the investigated power plant configuration and its components operating conditions, thus, facilitating the estimation of the blackout probability time variation as well as the dynamic criticality assessment of the power plant components. The proposed concept is verified by using a virtual simulation environment developed in Matlab/Simulink. This study supports the dynamic assessment of the ship power plants and therefore benefits the decision-making for enhancing the plant safety during operations.
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Bolbot, Victor, Gerasimos Theotokatos, Rainer Hamann, George Psarros, and Evangelos Boulougouris. "Dynamic Blackout Probability Monitoring System for Cruise Ship Power Plants." Energies 14, no. 20 (October 13, 2021): 6598. http://dx.doi.org/10.3390/en14206598.
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Stringent environmental regulations and efforts to improve the shipping operations sustainability have resulted in designing and employing more complex configurations for the ship power plants systems and the implementation of digitalised functionalities. Due to these systems complexity, critical situations arising from the components and subsystem failures, which may lead to accidents, require timely detection and mitigation. This study aims at enhancing the safety of ship complex systems and their operation by developing the concept of an integrated monitoring safety system that employs existing safety models and data fusion from shipboard sensors. Detailed Fault Trees that model the blackout top event, representing the sailing modes of a cruise ship and the operating modes of its plant, are employed. Shipboard sensors’ measurements acquired by the cruise ship alarm and monitoring system are integrated with these Fault Trees to account for the acquired shipboard information on the investigated power plant configuration and its components operating conditions, thus, facilitating the estimation of the blackout probability time variation as well as the dynamic criticality assessment of the power plant components. The proposed concept is verified by using a virtual simulation environment developed in Matlab/Simulink. This study supports the dynamic assessment of the ship power plants and therefore benefits the decision-making for enhancing the plant safety during operations.