Journal of Marine Technology and Environment 2020 Vol. 2

  • WIND ENERGY CAPTURING DEVICES WITH POSSIBLE IMPLEMENTATION ON CONTAINER SHIPS

    Mihail-Vlad VASILESCU; Dumitru DINU
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    This article presents different types of unconventional sources of energy, green ones, which can be implemented on a container ship. In the articleare descriebed renewable energy devices, used like an alternative source of energy, green energy suitable for container ships, for reducing environment pollution and fuel consumption. We have made some studies by using CFD programme Ansys Fluent, for discovering the forces which influence the Flettner balloon if is installed on top of a container ship at 300 m altitude. This article major points are: wind energy capturing devices, Makani Power Plane, Ampyx Power Plane, Altaeros Energies, Kite Gen, Joby Energy, Flettner balloon. In the article we also highlight the influence of meteorology when we select the best, optimal and most efficient green energy device suitable for a container ship in order to upgrade it. The present article is a piece of a big research on the installation of unconventional energy sources, on container ships.
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  • EMSO-EUXINUS INFRASTRUCTURE SUPPORT OF OFFSHORE UNDERWATER ENERGY

    Raluca RĂDULESCU; Vlad RĂDULESCU; Mariana PANAITESCU; Fanel-Viorel PANAITESCU
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Recently, a multitude of studies and research have revealed the enormous energy potential of the Planetary Ocean, generated by the hydrodynamics of seawater in the form of waves, tides or submarine currents. Preliminary studies conducted with various installations (in concept or prototype phase) in various countries of the world estimate a possible renewable energy budget of the order of TW. From this point of view, the Black Sea (Romania's exclusive economic zone) is no exception, being known (at least in the riparian countries) for the dynamics and strength of sea water, thus being susceptible to generating this type of energy.
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  • CAPTURE OF WAVE ENERGY

    Valentina POENARU; Dumitru DINU
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Electric power generation contributes to approximately 40% of the total CO2 emission across the globe. The Oceans cover more than 70% of the total surface of the Earth and have possess important source of energy stored in the form of: thermal energy, kinetic energy (waves and currents) along with chemical and biological energy with a combined potential of approximately 2 TW globally. Focus of this study is about the expansive potential of wave energy which can be exploited to meet the ever increasing global energy demand. Wave energy harnessing technology is still in its nascent stage of development, but there has been steady technological advancement and research to optimise wave energy conversion efficiency, proper planning with regards to location of the plant installation and impact on the marine environment. The main advantage of harnessing wave energy is it would cause insignificant pollution damage, negligible greenhouse gas emissions and economically viable as per various feasibility studies carried out globally.
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  • BODE AND NYQUIST PLOTS: ASSISTANCE IN SOIL CHARACTERIZATION

    Jana PAŘÍLKOVÁ; Zbyněk ZACHOVAL; Zuzana MŰNSTEROVÁ; Jan JANDORA; Jan MIKULKA; Jan DUŠEK; David JUŘIČKA; Tymoteusz ZYDROŃ; Andrzej GRUCHOT; Milan GOMBOŠ; Dana PAVELKOVÁ; Boriss GJUNSBURGS; Algirdas RADZEVIČIUS; Rytis SKOMINAS
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Climate change is a phenomenon manifested for instance, among other things, by alternating dry and flood episodes with an impact on the environment. Therefore, one must deal with the issues such as: how to retain water in the landscape, protect the soil from erosion or oneself from the consequences of floods. There are used well-known and proven principles supplemented by modern techniques and technologies to understand individual processes and solve their impacts. Electrical impedance spectrometry (EIS), in which a sinusoidal test voltage or current is applied to the sample under test to measure its electrical impedance over a suitable frequency range, is a powerful technique to investigate the electrical properties of a large variety of materials. EIS is used in a broad range of applications as a quick and easily automated technique to characterize solid, liquid, semiliquid, organic as well as inorganic materials. The subject of interest of the paper is the monitoring of selected soil characteristics in the water-soil interaction. Measurement of electrical impedance of soils in the frequency spectrum and processing of results in the form of Bode and Nyquist plots provides information on the water content in the soil and the possibility of estimating its structure. This is very important for various purposes of engineering geological practice, and especially for constructions. Model or limit curves of grain size, table values or indicative standard characteristics are used for the approximate assessment of some soil characteristics. Often, selected soil characteristics are described by the size of their effective grain or this parameter is used in mathematical formulas. In practice, the measured impedance spectra, represent an electrical fingerprint of the sample providing an insight into its properties and behaviour. The selected measurement results are obtained by new apparatus with Z-meter device in field and laboratory conditions.
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  • ENERGY EFFICIENCY OF BULGARIAN MARITIME TRANSPORT

    Elena KATELIEVA
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Efficient transport plays an important role in the process of economic and social development of modern society. Maritime transport provides significant opportunities to increase efficiency and improve environmental performance. The purpose of this paper is to present an analysis and various opportunities for energy efficiency improvement of maritime transport. The strategic geographic location of Bulgaria between Asia and Europe, defines our country as an important partner in the international trade. The participation of the Bulgarian transport on the international transport market and the development of the transport system, as part of the European transport system is one of the important directions for improvement of its efficiency. The transport sector is at a stage where existing measures for energy efficiency improvement need to be deepened and expanded in order to meet the sustainable development scenario. Environmental protection, energy efficiency and optimal use of the resources are among the main goals of the modern scientific community. Energy efficiency optimization in maritime transport could be achieved by applying a complex analysis and a combination of organizational, technical and operational measures for improvement.
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  • MODERN TECHNOLOGIES IMPLEMENTED IN THE OPERATION OF MARITIME CONTAINER AND RO-RO TERMINALS

    Robert Alexandru DĂINEANU; Dumitru DINU
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Maritime transport is constantly changing and adapting. With the evolution of containerized transport, the concept of RO-RO transport and ships also took shape - it was initially developed for the sustainability of general freight transport on ordinary routes. The geographical position of the Black Sea is ideal for sea traffic and also has a high potential for the development of the Ro-Ro market. Ro-Ro ships are particularly well adapted to the requirements of short-distance transport, where transport speed and optimum operability are essential. The introduction of a Ro-Ro / Ro-Pax line that will connect the Port of Constanta and Karasu, Turkey will offer a cheaper and faster alternative to highly congested land routes around Turkey / Bulgaria and Bulgaria / Romania. Ro-Ro intermodal transport has many advantages, such as: high reliability, safety, low level of administrative complexity, reduces exposure to road accidents. Designed exclusively for container transport, the project provides for some changes to the terminal to determine the proper functioning of Ro-Ro / Ro-Pax intermodal transport, as follows: construction / installation of a pontoon, modification of the vehicle access road, extension of the ramp operation, arranging a quay for ships with a total length between 180-200 m, ensuring all facilities for good operability. The ship must complete a round trip between the ports of Constanta, Romania and Karasu Turkey within 24 hours. It approximates a stationary time of berth of maximum 2 hours and a journey of maximum 10 hours round trip.
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  • CURRENT CONTROL FOR STEPPER MOTOR OPERATION

    Violeta CIUCUR
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    The maximum benefit of a stepper motor can only be obtained if it is ordered correctly, this requiring a direct current source, an electronic switch and a controlled pulse generator (numerical information). For all their advantages, stepper motors have several limitations that can cause significant implementation and operation problems depending on the application.
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  • SUSTAINABLE DEVELOPMENT IN MET: THE MAAP PHILIPPINES AND CONSTANTA MARITIME UNIVERSITY ROMANIA BEST PRACTICES

    Angelica M. BAYLON; Mariana PANAITESCU; Fanel-Viorel PANAITESCU
    10/1/2020
    Marine sciences and engineering; Renewable energies; Marine renewable energies and Sustenability; Advanced technologies for MET; Climate changes
    Sustainable development (SD) is defined as the development that meets the needs of the present without compromising the ability of future generations to meet their own needs. The result of the analysis from the gathered data is presented in this summary. The analysis was based on the following research objectives: (1) analyze the concept of SD and applicability to Maritime High Education Institutions (MHEIs); (2) MHEIs integration of sustainability principles in their management, operations and curricula activities; (3) identify barriers to integration; (4) analyze contemporary approaches of MHEIs for SD; (5) suggest ways of improving the SD performance of MHEIs.
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