Items · Journal of Marine Technology and Environment

THE USE OF SIMULATION IN REMEDIAL INTERVENTIONS TO MARINE AREAS POLLUTED BY OIL

Mirela-Iuliana SUNDRI; Mariana PANAITESCU; Fanel-Viorel PANAITESCU

4/1/2017

Marine sciences and engineering ; Renewable energies ; Marine renewable energies and Sustenability ; Advanced technologies for MET ; Climate changes

Unloading of hydrocarbons into the marine environment has a signifiant economic impact for both the activities performed on the shores and exploiting the resources of the sea. In this context it is necessary to adopt a strategy and a national system of intervention to respond quickly and effectively in the event of a disaster caused by an accidental oil pollution in the area of the continental shelf or in the Romanian coastal belt. Quick resolution of such problems, as a result of work techniques developed as a result of simulations, reduces major negative consequences. In the present work was chosen using two simulation programs, HYSPLIT and ADIOS,both developed by NOAA, for forecasting events due to oil spills of the Black sea romanian coast and the choice of methods of remediation For simulations were used two types of oils: Abu-Dhabi and Horcon. The results of simulatios were: visualizing graphs oil removal, the charts of evaporated oil, the oil dispersing proces, the content of water in oil, the concentration of benzene in air. HYSPLIT and ADIOS programs for simulation the processes of removal oil discharged into the sea permit: making a prognosis; evaluation methods of remediation; the possibility of taking measures in advance to protect areas located at shore.

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VALIDATION OF THERMAL BALANCE EQUATION OF DIVER IN HYPERBARIC ENVIRONMENT AT SATURATION WITH HELIOX

PhD student eng. Tamara STANCIU

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

I presented the validation of diver thermal balance equation in subsea hyperbaric environment at diving with air, in a previous paper. The same equation was validated, at saturation diving using Heliox breathing mixture, in the simulator of Laboratory Hyperbaric Diving Center. The subjects were separated into two groups of four: the first group dived in saturation with Heliox at 60msw “stage depth” and the second one at 30msw. I calculated, with equation (1.1), theoretically temperatures divers, after sinking into warm water (20 0C) and into cold water (17 0C). At the end diving temperatures were measured each subject, for each scenario diving (depth, water temperature, stationary time, thickness suit, etc.). Theoretically temperatures were compared with those obtained experimentally and the differences between theoretical and real values were 1 0C. The mathematical proposed model is valid for Heliox saturation diving in wet hyperbaric environment, up to 60 msw.

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MAGNUS EFFECT STUDIED WITH ANALYTICAL AND NUMERICAL METHODS

Andrei Alexandru SCUPI

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

Different physical phenomena can be studied with the help of numerical programs. These programs are highly used in academic institutions for a better understanding of the phenomenon itself. A good correspondence between analytical representation and numerical representation is presented for different potential flows. The paper also presents a practical usage of potential flow when investigating the performance of an unconventional system that uses Flettner rotor for helping ship propulsion. The simulation, performed with CFD (Computational Fluid Dynamics) was made for different working conditions by varying the incidence angle.

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CONSIDERATIONS REGARDING DESIGNING 50 X 6 METERS SUSPENDED CROSSING

Adrian POPA; Ionut Cristian SCURTU; Beazit ALI; Anastasia DUSE

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

This paperwork is designing a suspended 50mx6m suspended crossing over a channel or a small river considering not only the design load but the response spectrum too.

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USE OF PRISMATIC CELL PANEL IN SHIPCONSTRUCTION

Adrian POPA; Ionut Cristian SCURTU; Beazit ALI; Andreea JENARU

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

This study was carried out starting from a real need: the possibility to create a fast rescue ship, able to operate in shallow waters in environments with explosive potential. That why, the idea of the designers was to use aluminium alloys in order to obtain a light boat. The hosed material is AL5083H116.

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A RISK OF CIBERNTICS IN THE BLACK SEA SYSTEMS

Nikolay PETROV; Fanel-Viorel PANAITESCU; Mariana PANAITESCU

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

Cybernetics consider the machines, living organisms and sea society as a organizing comprehensive form (system) – sea risky system that naturally historical or artificially reaches a certain level of organization according to relevant quality fixed structure or level of complexity. Basic laws and principles of cybernetics are inextricably linked to the reliability of functioning cybernetic systems. Cybernetics (cyber society) consider the objects as a system, not as a control system of a general nature, but as a system of defined set of general and specific structural and functional properties (presence in the world of living systems and social structures).

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HIGH PERFORMANCE CONTROLLABLE PITCH PROPELLERS

Beazit ALI; Adrian POPA; Gheorghe ICHIMOAIEI; Levent ALI

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

In order to maximize the design of the Controllable Pitch Propellers for low acoustic signature is necessary to analyse more aspects the general features of propeller and the effect of air emission, the effect of cavitation by using different computer programme which can stimulate a lot of parameters developed on the model on scale and on the full scale model. The result made possible a new way for improvement of design techniques to obtain more and more less noisly Controllable Pitch Propellers.

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ESTIMATED PROPULSION OF SMALL SCALE HYDROFOIL SHIPS

Beazit ALI; Adrian POPA; Gheorghe ICHIMOAIE; Levent ALI

4/1/2017

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

This paper presents an original procedure for estimating the propulsion of small scale hydrofoil ships. This procedure has enabled the development of a computer program that can predict both those types of ship propulsion regime imposed at a quasi-stationary speed and the march regime on wings. The calculation software obtained may serve to design any type of hydrofoil ship. The input data are read in a network that has access throughout the development of the program. In the end, the program outlines for the two march regimes of the ship which the study has been carried on, the drag resistance curve depending on the speed.

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CAVITATION AROUND PROPELLERS EQUIPPED WITH ENRGY SAVING DEVICES

Mihail – Vlad VASILESCU

10/1/2016

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 – energy saving devices, on ships. These mechanisms improve the propulsion performance and lower the fuel consumption of the ship using reaction fins for low-speed full ships and stator fins for high-speed slender ships. By using CFD - fluid flow computer program, we analyzed and evaluated the cavity propellers on ships equipped with energy-saving mechanism, including keel and rudder. This helps in understanding the flow characteristics such as pressure distribution on the propeller that would otherwise require many hours of effort and experimental analysis. The result is a high degree of propeller optimization and of the mechanism with the role of energy saving. The main reason of this article is to try to reduce cavitation around the propeller and show a modality for reducing ship pollution, so the quantity of fuel used, that mince, to reduce the price of transportation and it becomes a method of saving money for the ship owners and charters.

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CONSTRUCTION TESTING OF AN OFFSHORE PIPELINE USING NUMERICAL METHODS

Liviu – Constantin STAN

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

The production of oil and gas from offshore oil fields is, nowadays, more and more important. As a result of the increasing demand of oil, and being the shallow water reserves not enough, the industry is pushed forward to develop and exploit more difficult fields in deeper waters. In this paper, there will be deployed the new design code DNV 2012 in terms of checking an offshore pipeline as compliance with the requests of this new construction code, using the Bentley Autopipe V8i. The August 2012 revision of DNV offshore standard, DNV-OS-F101, Submarine Pipeline Systems is supported by AutoPIPE version 9.6. This paper provides a quick walk through for entering input data, analyzing and generating code compliance reports for a model with piping code selected as DNV Offshore 2012. As seen in the present paper, the simulations comprise geometrically complex pipeline subjected to various and variable loading conditions. At the end of the designing process the Engineer has to answer to a simple question: is that pipeline safe or not? The pipeline set as an example, has some sections that are not complying in terms of size and strength with the code DNV 2012 offshore pipelines. Obviously those sections have to be redesigned in a manner to meet the conditions.

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VALIDATION OF DIVER’S THERMAL BALANCE EQUATION IN SUBSEA HYPERBARIC ENVIRONMENT AT AIR DIVING

PhD student eng.Tamara STANCIU

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

The solution of diver’s thermal balance equation in subsea hyperbaric environment was validated by experimental diving with air breathing, in the simulator of Laboratory Hyperbaric Diving Center. They were calculated theoretically end temperatures of divers submerge in heat water (21-22 0C) and cold water (15-17 0C), with equation (1.3). They were measured temperatures of end diving, for each subject, in each scenario diving (depth, water temperature, stationary time, thickness suit, etc.). Theoretically temperatures were compared with those obtained experimentally and the differences between theoretical and real values were 0.1 – 0.5 0C. The mathematical proposed model is valid for diving in hyperbaric environment simulated wet, up to 60 m depth and for air breathing gas unit diving.

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A METHOD FOR FLOW MODELLING OF VULNERABLE AREAS

M. PANAITESCU; F.V. PANAITESCU; I.A. ANTON; C. ANTON

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

This paper presents the floods of the waters on Timis River in compliance with the provisions of the legislation from Romania correlated with that of the European Union modelling in MIKE11 software. Flooding that occurs in the Banat basin is a natural and frequent phenomenon on the water courses in this catchment area, where 1,085 km of the water courses are dammed and there are also numerous hydrotechnical and water management works. Although these works are well made and are intended to protect against floods, a review of these natural phenomena occurring in Banat highlights the fact that over a period of approximately 250 years, major flooding has occurred with a frequency of about once every 30 years, and in some cases these phenomena occur every few years, for example the floods of 2005 which occurred just five years after the floods of 2000. In almost every month in 2005 (February-September), throughout Romania, river water volumes exceeded the capacity that water defences were built to handle. The most important floods in Banat occurred in April. In April 2005 heavy rains were recorded in the Banat region: Oraviţa (226.4 mm), Resia (205.3 mm), Lugoj (201.2 mm), Caransebeş (200.6 mm). These rain falls exceeded reviously recorded maximum monthly levels. This rainfall combined with snow melt – the thickness of snow layers in the mountains at that time exceeded one meter (Ţarcu - 126 cm, Semenic - 26 cm) – led to historically significant flooding from April to September 2005, affecting extensive areas and resulting in casualties and significant property damage. In this paper we present a method of flow modelling (for year 20050) which can use with the same tools for another vulnerable areas.

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DATA OF POLLUTION ON SURFACE WATER AND GROUNDWATER

Elvidan Mariana NICHITA; Mariana PANAITESCU; Fanel-Viorel PANAITESCU

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

In this paper we investigate the impact of pollution on the surface water and groundwater. For this, we collect samples from Harbour Tomis Constanta, South Mamaia, Siutghiol Lake, Tabacarie Lake , water from a fountain and water which proves from stink. We analised the physical and chemical parametres of all samples. Finally, the results demonstrated that water samples from areas North Mamaia, Harbour Tomis, Siutghiol Lake, Lake Tabacarie have the values of quality indicators higher that values from Water Pollution Technical Standards. The samples from fountain and from stink are not polluted. So, we can talk about pollution of those waters resulting from the activities undertaken by people of course, because of the attraction of these areas.

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THE SHORTEST PATH PROBLEM WITH UNCERTAIN INFORMATION IN MARITIME TRANSPORT ROUTING

Tomasz NEUMANN

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

The purpose of this paper is to find a solution for route planning in a maritime transport networks, where the costs of tracks, factor of safety and travel time are ambiguous. In this paper author propose a hybrid routing algorithm with Ant Colony Optimization.

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COMPARATIVE PERFORMANCE ANALYSIS OF R134a AND R290/R600a REFRIGERANTS IN A VAPOR COMPRESSION REFRIGERATION CYCLE

Feiza MEMET

10/1/2016

Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes

Vapor compression technology is used in the majority of space cooling and food refrigeration applications. Refrigerated ships and marine branches, such as merchant, naval, fishing or cruise-shipping are used to transport perishables. This system is running in several situations on R134a, a HFC refrigerant having excellent thermodynamic and thermo-physical properties, but an adverse environmental impact, considering its global warming potential. This paper deals with a theoretical performance study of a vapor compression refrigeration system working with the pure refrigerant R134a and a mixture, R290/R600a (50% / 50%), considering the effect of the main factors that affect the coefficient of performance: interior tube diameters, working pressures and inlet water temperatures. Are highlighted cases in which the performance when using the mixture is higher than the one when using R134a.

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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

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

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

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

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

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

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

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

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

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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