Items

  • PERSONALITY FACTORS AFFECTED JOB INVOLVEMENT IN CONTAINER TERMINAL

    K.B. LOKE; A.H. SAHARUDDIN; I. RIZAL; M.R. OTHMAN; A.S.A.KADER; A.M.ZAMANI
    10/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    Employees with higher job involvement would pay attention to their work. At the same time, it would increase organizational efficient and effective. Therefore, this study analyzed the personality factors and job involvement in container terminal, to determine the personality factors that affected the degree of job involvement. Mann-Whitney U and Kruskal-Wallis tests are used to analyze the data. The results are displayed that education background and job specification are affected the job involvement. The initial output can use in managerial decision making, to assist in organization planning.
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  • CURRENT STATE OF SLUDGE PRODUCTION, MANAGEMENT, TREATMENT AND DISPOSAL IN ROMANIA

    Andreea GHIOCEL; Valeriu PANAITESCU; Mariana PANAITESCU; Constantin TULEANU
    10/1/2016
    1 citation
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    For many years, the large amount of sludge generated at the WWTPs in Romania has been of great trouble, raising significant concerns for plants operators. This paper reviews the current situation of sludge production, management, treatment and disposal routes. The continuous development of the wastewater sector and the need to align to the European regulations that state that all settlements with over 2000 inhabitants should have sewerage systems connected to a wastewater treatment plant which includes a sludge processing line, will lead to a great increase in the total amount of sludge generated. The total sludge production in Romania has been growing in the past decade and current studies estimate that by the end of 2018 the total amount will exceed 400000 tonnes. Choosing the most appropriate sludge treatment technology is a key factor in the application of integrated sewage sludge management system. Together with economic and social considerations, sludge managers need to implement more sustainable management systems. Decision makers should combine in an optimum way the alternatives for sewage sludge handling, considering all available information on technical, economic and environmental issues.
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  • STUDIES CONCERNING THE STRUCTURAL RESPONSE OF THE SHIP DURING REFLOATING OPERATIONS BY HER OWN MEANS

    A.E DUSE; C. VARSAMI ; M. PANAITESCU; F.V. PANAITESCU; N. GROSANU
    10/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The paper presents the results of a very thorough and prolonged activity. Even if results are succinctly presented, by graphics and diagrams, the volume of data behind them is a huge one, detailed in the paper’s informations. In the first stage, starting from a very detailed body plan, the 3D model of the hull was conceived in CAD/CAE - Solidworks. The level of complexity of the model is a very high one, but this one was limited as well by the processing capacity of the calculus system used. In the second stage, the propeller’s maximum force was determined when going astern, by a hydrodynamic analysis and then this force was applied as a percentage on the ship in seven different studies, using loads of 100%, 95%, 90%, 85%, 80%, 60% and 40%. In order to perform these studies the CAE ANSYS12.1 was used. In the end of these studies an interesting conclusion is reached from the scientific point of view finalized by a very useful recommendation for masters.
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  • IMPLEMENTATION OF A NEW INTEGRATED MUNICIPAL WASTE SYSTEM IN CONSTANTA COUNTY

    Catalin ANTON; Iulia-Alina ANTON; Fanel-Viorel PANAITESCU; Mariana PANAITESCU
    10/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    EU waste policy has evolved over the last 30 years through a series of environmental action plans and a framework of legislation that aims to reduce negative environmental and health impacts and create an energy and resource-efficient economy. The EU’s Sixth Environment Action Programme (2002- 2012) identified waste prevention and management as one of four top priorities. In this paper we will present the implementation of a new integrated municipal waste system in Constanta county. An important feature of the Constanta county, with implications for integrated waste management is represented by the high degree of urbanization: 70% of the county population lives in urban areas, of which over 70% in towns located in the Black Sea area. The overall objective of the system of waste Constanta is developing an integrated, sustainable waste management, by improving waste management based on adequate infrastructure, reducing the number of contaminated sites in the county, mainly aimed at respecting the acquis communautaire of environment and having the effect to grow living environmental and standards in Constanta County.
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  • A REVIEW OF THE USE OF ECDIS FOR THE SAFETY OF NAVIGATION

    Nicoleta ACOMI
    10/1/2016
    2 citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The use of electronic equipment for navigation is widely considered both necessary and useful. The introduction of electronic charts and ECDIS equipment has substantially reduced the officers’ workload previously burdened by paper chart navigation. The amount of time previously spent for handling and correcting the paper charts during navigational watch gives the dimension of the effort required by the traditional paper navigation. The valuable time saved by the paperless navigation offers the deck officer the possibility to properly lookout, evaluate and assess the situation before making decisions. The advanced technologies offer multiple benefits, through sophisticated functions, used during navigation to greater or lesser extent. These functions are generally regarded as providing assistance for the safety of navigation and therefore their understanding is paramount. Several casualties related to ECDIS navigation have proved that the deck officers over-rely on the electronic equipment. In many cases, these officers failed to analyse and synthetize the information provided by the electronic equipment. This paper aims at advancing factual information relating to ECDIS navigational incidents and analysing their occurrence with regard to ECDIS implementation timetable. The main result of this review is the understanding of human resistance to change, in spite of common openness to using new technologies.
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  • WIND ENERGY AND CONTAINER SHIPS

    Mihail – Vlad VASILESCU
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The main focus of this article is the development and use of clean renewable energy sources – wind energy, on ships. The main goal is the diversity of energy sources and the reduce of environmental pollution, hoping that this will ensure future energy security of supply. I propose to install wind turbines, kite which generates electricity and kite used for propulsion on a port-container. The main reason of this article is to try to show a modality for reducing ship pollution and the quantity of fuel used, that mince, to reduce the price of transportation and a method of saving money. As a result of my research I discovered that is more convenient to use vertical axe wind turbines like French model Statoeolien GSE 4 comparing with a normal wind turbine with orizonthal axe, to use the mixed propulsion motor-kite then only a diesel motor, and a kite with generates electricity than a simple wind turbine. Wind energy is a very good solution to global energy problems. It is considered the cheapest source of energy. The kites which generate electricity are revolutionizing wind turbines.
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  • MANAGEMENT OF INVESTMENT RISK OF ЕCONOMIC OPERATORS IN THE BLACK SEA REGION

    Assoc. Prof. Dr. Galina KURTEVA
    4/1/2016
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The economic interest in the Black Sea region is determined by its dynamic development, complex reality, opposing outside interests and relations of the Black Sea countries to the rest of the world. One aspect of this interest is related to the investment process. Successful implementation of investment decisions requires consideration of various factors determining the degree of risk for the investor. In this context, the current report presents some strategies to manage an investment risk.
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  • METHODS AND INSTRUMENTS FOR ENERGY EFFICIENCY ASSESSMENT AND IMPROVEMENT OF SHIP SYSTEMS

    Elena KATELIEVA
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The purpose of this paper is to present instruments for complex assessment and energy efficiency improvement of ship systems. This article presents energy efficiency analysis through the study of energy flows in the system and tools developed by IMO for monitoring of greenhouse gas emissions from ships. The combination proposed, of various energy-saving technologies and measures can provide achievement of fuel efficiency and reduction of greenhouse gas emissions.
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  • METHODOLOGY FOR MANAGEMENT AND IMPROVEMENT OF ENERGY EFFICIENCY OF SHIPS

    Elena KATELIEVA
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    Ship owners and the management team of shipping companies have a crucial role in the optimization process. They have to establish and implement a specific energy policy focused on the use of innovative solutions for energy saving, emission control and performance optimization. The purpose of this paper is to present a methodology for energy management and energy efficiency improvement of ships. It is necessary to assist shipping companies in the selection of appropriate measures to achieve balance between economic, technological and environmental challenges.
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  • SYSTEMS FOR COLLECTING AND TRANSFERRING OF METEOROLOGICAL INFORMATION USED FOR WEATHER PREDICTION

    Ivaylo GRANCHAROV; Belev BLAGOVEST
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    During the ship’s voyage the mariners are facing many hazards like strong winds, rough sea, icebergs, etc. That is why the accuracy of meteorological information received on board is vital. Although the WMO is aiming for automation of the processes for collection and transmission of meteorological information the watchkeeping officers role in manual input of meteorological information is still very important. Meteorological data obtained from satellites, shore stations, aircrafts, research and merchant vessels performing the voyages in different areas of the Worlds Ocean, and systems of floating, drifting and moored buoys are used for weather forecasting. Reliable database for every region requires constant measurements of meteorological parameters for a long period of time. Real time wave and wind measurements are important for forecasting and sending of warning messages to the ships, creation of numerical models and proper work of the companies, providing ship’s routing services. This paper discusses the systems used for collecting, storage and processing of meteorological data, the automated weather systems used for observation of meteorological parameters on board of the ships and the systems used for transferring of all these data.
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  • THE PREDICTION OF NOX EMISSIONS FROM DIESEL ENGINES BASED ON TWOZONE THERMODYNAMIC MODEL

    Dawwa MAHRAN; Bocanete PAUL
    4/1/2016
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    In this study a two-zone thermodynamic model is used for the prediction of NOx emissions from marine diesel engines, the calculation of two-zone model will be based on one-zone thermodynamic model and on the use of Zeldovich mechanism. The calculated NOx emissions validated by comparing them with measured values at different engine operating regimes. The effect of cylinder wall temperature, air temperature coefficient, and residual gases coefficient on the model sensitivity will be illustrated and explained as well.
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  • A CFD STUDY ON THE EFFECT OF INJECTION PARAMETERS ON THE FORMATION OF NOX EMISSIONS IN DIESEL ENGINES

    Dawwa MAHRAN; Bocanete PAUL
    4/1/2016
    1 citation
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The objective of this study is to predict the effects of two main injection parameters on the formation of NOx emissions. The first parameter is the injection timing, the effects of injection timing on the formation of NOx emission will be illustrated and explained at four different injection timings. The second parameters is the cone angle, the effect of changing the cone angle on the formation of NOx emissions will be illustrated and discussed at different three cone angles as well. Computational fluid dynamics (CFD) and ANSYS ICE program were used for simulating the injection process, combustion, and the formation of NO. The Volume-average mole fraction of NO, the Mass-Average mass fraction of NO and the NO density will be discussed at all cases of injection parameters..
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  • MANAGERIAL ANALYSIS OF ENERGY EFFICIENCY STANDARDS’ IMPLEMENTATION ON BOARD TO OPERATING SHIPS

    Drd. Doru COSOFRET ; Dr. Florin Marius NICOLAE; Dr. Catalin POPA
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    Since 2013, together with the Resolution MEPC.203 (62)/2011 IMO enforcement, the vessels in service top and operational management must adopt the necessary measures to increase energy efficiency on board the ships in order to comply with the standards imposed. In this order, subscribed to a wide study in this mater, the present paperwork is focused punctually on the holistic analysis of the optimum energy efficiency measures that can be implemented at managerial level, on board the commercial vessels in service, operating more than 20 years. Through the proposed measures, the overtaken analysis provides the prerequisites for an efficient tool in shipping business management, providing a useful working framework, grounded in theory and practice, for adopting the optimum decisions to assure the energy efficiency on board the operating ships, targeting the ratio between lowest costs and best economic performance.
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  • ADOPTING OF SENSORS WITH AMORPHOUS RESISTIVE LAYERS IN ELECTRICAL MEASURING OF SPEED OF FLUIDS IN SHIPS

    Bohos APRAHAMIAN
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    New resistive elements, formed upon electro insulated plate of vacuum thick ceramics by magnetron sputtering or screenprinting of amorphous resistive layers are studied. The elements possess a relay-type strong negative temperature dependence of resistivity. The new elements are adopted as sensors in standard bridge circuits for measuring of speed of fluids. Prototypes of sensors with various compositions of amorphous metal layers are analyzed and compared. The new elements show better sensitivity compared to a standard sensors.
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  • ELABORATION AND TESTING OF LABORATORY STAND FOR INVESTIGATION OF AN ARC FAULT DETECTION DEVICE

    Bohos APRAHAMIAN
    4/1/2016
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The arcing faults may have a severe impact on the ship or on the crew. The paper presents the elaboration and testing of a laboratory stand for investigation of an arc fault detection device in the Technical University of Varna, Bulgaria. The presented laboratory stand will train future electrical engineers to work with this new protection device.
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  • APPLICATION OF PROTECTIVE TIN COATINGS ON COPPER AND ALUMINUM LOW VOLTAGE BUSBARS OF ELECTRICAL DISTRIBUTION BOARDS OF SHIPS

    Bohos APRAHAMIAN
    4/1/2016
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    In this study an opportunity for investigation and application of protective monolayers of TiN obtained in reactive arc method in N2 atmosphere is examined. The coatings are deposited on copper and aluminium low voltage busbars of electrical distribution boards. The aim is to reduce the contact-potential difference between the busbars, made of different metals, i.e. copper and aluminium and, thereby, to reduce the power losses. The article also presents the results of studies of corrosion resistance, in particular the resistance to salt sea mist of the coated busbars. The possibility of using these busbars at sea has been experimentally proven.
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  • PHOTOVOLTAIC CELLS - PROJECT OF USING THEM ON CARGO SHIPS

    Mihail - Vlad VASILESCU
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The main focus of this article is the development and use of clean renewable energy sources on ships. The main goal is the diversity of energy sources and the reduce of environmental pollution, hoping that this will ensure future energy security of supply. I propose to install the solar panels on a port-container. The reason of this article is to try to reduce ship pollution and the quantity of fuel used, that mince, to reduce the price of transportation and to save money. As a result of my research I discovered that is more convenient to use the Rawlemon photovoltaic sphere that normal solar panels. Photovoltaic sphere is generating energy by day and night, in all types of weather. It has a yield with 70% higher than normal photovoltaic panel attached to a fixed mount, it can generate upto 3.4 kWh/day. Environmental impact of photovoltaic field is limited to space used and to the visual impact because there are nil polluting emissions, thermal or acoustic. Photovoltaic sphere is revolutionizing photovoltaics panels, it captures the Sun rays on the opposite side of the sphere acting as a lens which focuses them on a large area directly to the solar panel. Action on energy efficiency is one of the fastest and most effective ways to support improving the performance of companies with respect the protection of environment. Energy is one of the most controllable costs, because any energy savings are accounted directly into profits.
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  • ANALYSIS ON THE OFFSHORE WIND IN THE EUROPEAN MIX ENERGY

    Liviu-Constantin STAN
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The energy sector of a country is stronger when multiple ways of producing energy exist, so when there are multiple systems of energy and is less resistant when there is only one way of applied producing energy. The solution for the future stability of everyday life is from the energetic point of view, the existence of several energy systems in parallel. In this system, the renewable energy sources (RES) play an increasingly important place, contributing to a sustainable and efficient development, compatible with a cleaner environment. Among these energy sources, the marine RES, which include both offshore wind and ocean energy, become from one year to another, important resources generating economic growth and jobs enhance the security of its energy supply and boost competitiveness through technological innovation. Between the both marine RES sectors, it is distinguished the importance of the offshore energy that increases year by year. The figures that will be presented in the paper are relevant in this sense. The paper contains a desk analysis of the offshore energy area, showing figures, images, dates and conclusions on these new technologies and their effects on short and long terms. Also, a SWOT analysis is included, representing a necessary assessment of the strong and weak points, trying to adjust the strengths to the opportunities and reduction at a minimum level of the threats, eliminated the weak points. The projects based on this type of energy source, its positive results outline a promising perspective for the investors and authorities. The benefits are conclusive in this area: this inexhaustible and free resource generates energy with zero emissions, provides permanent and temporary jobs, services and economic growth, a balanced proportion between supply and demand of energy.
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  • BLUE ENERGY IN THE SEAS AND OCEANS

    Liviu-Constantin STAN
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The seas and oceans have the potential to become important sources of clean energy. Marine renewable energy, which includes both offshore wind and ocean energy, presents an opportunity to generate economic growth and jobs, enhance the security of the energy supply and boost competitiveness through technological innovation, contributing to the decarbonisation goals. In the context of a decrease of the primary resources, the blue energy generated by the oceans and seas captured the interests of many countries. We see today many studies, researches, projects that crossed the borders of the countries, developed by collaborative mixed teams. The results are promising, the success is guaranteed. The present paper is a desk research on the ocean energy in Europe and not only in this region, showing the best practices in this area of activity and their implementation. The conclusions are very clear and sustained by the figures; the blue energy gained its own place in the mix energy of many countries. This inexhaustible resource seems to gain more and more interests year by year.
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  • COMPUTATIONAL FLUID DYNAMIC ANALYSIS OF MARITIME CONTAINER TERMINALS

    Laurentiu OANCEA; Dumitru DINU
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The existing movement for the reduction of environmental impact and improvement of efficiency of processes, lead to a need for optimizing the transport and logistic chains. Here it is presented a possible approach for using Constructal Theory in order to develop an alternative for shape optimization and access to the storage area in a container terminal for reaching sustainability. The approach consist on the utilization of the Constructal Theory for generating optimized geometrical shapes of the container storage area. The analysis shall be made based on the analogy between transport systems and fluid dynamics, which can be transferred for advanced analysis in a FEM application. The results will show the possibility presented by this kind of application for the overall optimization of transport systems and reduction of transport times, thus decreasing the impact on the terminal and reducing GHG emissions.
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  • METHOD OF CHOOSING A BETTER ROUTE IN SHIPPING

    Tomasz NEUMANN
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    This paper presents a different view on the evidence theory and Dijkstra's algorithm. In this paper, the algorithm will be used in the further analysis to additional paths between nodes can be found in the maritime sector. In many cases, the best solution for a single criterion is not sufficient. It would be search for more effective solutions of the starting point to use for subsequent analysis or decision of the captain of the vessel. With innovative thinking mechanisms it is possible to create a decision support system based on known Dijkstra's algorithm. Reasoning mechanism is based on the theory of evidence. The intervals were used, where interval means a set of real numbers with the property that any number that lies between two numbers in the set is also included in the set.
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  • ELABORATION OF THE AUTOMATIC VOLTAGE REGULATORS OF THE SHIP SYNCHRONOUS GENERATORS

    Todor LAZAROV
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    In order to raise the effectiveness of the energy system an electronic voltage regulator with a high speed operation can be installed. An original AVR scheme which uses, which uses proportional-integral-differential control and pulse-width modulation scheme to control the output voltage of the compound system, is presented. The scheme of the electronic regulator is enclosed.
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  • MONITORING SYSTEM FOR CONTROL, REGISTRATION AND MANAGEMENT OF ENERGY QUALITY INDICATORS IN SHIP POWER SYSTEMS

    Ginka IVANOVA; Bohos APRAHAMIAN; Valentin GYUROV
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    The paper presents the structure and operation of a developed mobile monitoring system for analysis, control, registration and management of the energy quality indicators in the ship electrical power systems. The system was successfully tested in the Ship’s Electric Drives Laboratory of the Technical University of Varna.
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  • ANALYSIS OF THE OPERATING SOFTWARE USED FOR WEATHER ASSESSMENT ON BOARD OF THE SHIP

    Ivaylo GRANCHAROV ; Belev BLAGOVEST
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    Nowadays, many computer agencies offers to the companies operating in the maritime field as ship owners, ship operators and charterers, various services related to the processing of meteorological information. However the use of competent meteorological advisory company did not relieves the master and navigating officers from responsibility concerning the safety of the ship, lives of crew members and condition of the cargo. This paper discusses the companies, software and internet sites, which presents a great amount of meteorological information to the ship business. The obtained meteorological information can be used on board of the ship for: voyage planning by masters; planning the duration of the voyage and calculation of the fuel coast by ship owners; raising a claim by charterers concerning the insufficient speed of the vessel as agreed in charter party, or for any other calculation and predictions relating shipping. Some of these services are free of charge while the others required regular payment. On board of the modern vessel, using new satellite technologies, it is a matter of minutes to obtain the required meteorological information.
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  • THE EVOLUTION OF AN ACCIDENTAL RELEASE OF OIL, NEAR BURGAS

    George-Laurentiu DUMITRESCU; Ionut VOICU; Fanel-Viorel PANAITESCU; Mariana PANAITESCU
    10/1/2015
    No citations
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced; technologies for MET; Climate changes
    In this paper it is presented a computer simulation for a possible prediction of an oil slick near Burgas harbor. The simulation it is carried out using POTENTIAL INCIDENT SIMULATOR EVALUATION AND CONTROL SYSTEM (Pisces II) which is a software, especially designed for assessing the consequences of oil pollution on sea water. PISCES is an incident response simulator designed for preparing and conducting command centre exercises and area drills. The application is developed to support exercises focusing on oil spill response. The model takes into account the main physicochemical processes occurring in the oil slick, which include evaporation, dispersion, emulsification and viscosity variation. Simulation is carried out with regard to the following environment factors: coastline, field of currents, weather, sea state, ice conditions and environmentally sensitive areas. In addition, models of response resource application including booming and recovery have been developed [1], [3], [4].
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