Journal of Marine Technology and Environment 2020 Vol. 1

This article presents the scale of pollution in the world has because of the shipping industry. In the article, the reader will discover, renewable energy device system, used like an alternative source of energy, green energy suitable for container ships, for reducing fuel consumption, environment pollution, costs for ship owners and charters. We have made some studies about which is the best, optimal and most efficient system suitable for a container ship in order to upgrade it. After a long term of comparisons between systems we consider that if we will install some modern Flettner rotors and an Flettner balloon, in addition to the diesel generators that already exist on the ship, together with an additional electrical engine, we can reduce the fuel consumption, environment pollution and costs. This article major points are: pollution caused by ships nowadays, modern Flettner rotor, Flettner balloon, choosing the best gas suitable for our Flettner balloon, wiring diagram for the connection of the green source of energy to the main power switchboard of the ship, hybrid propulsion on container ship by using a diesel engine and an electrical engine. The present article is a piece of a big research on the installation of a hybrid system powered by energy, coming from conventional and unconventional energy sources, on container ships. We propose a propulsion system with a diesel and an electric motor and connection scheme to an automatic computerized generator control system. Finally, we have connecting conventional and unconventional energy sources to the ship main power switchboard.

Marine transportation is very convenient due to its very low costs. Due to the constant growth of population and its food demand, marine refrigeration is an attractive business. The purpose of this work is to find a way in order to enhance the total energy efficiency of a marine refrigerating plant working with R 134 a. In this study will be make a comparative analysis of the performance of a vapour compression refrigerating plant- met in marine transportation of perishables goods. The temperature values of the sea water at the inlet and outlet of the condenser will be considered to be 23, respectively 26 Celsius degrees. By studying the main parameters of the refrigerating plant cycle, we can establish the value of the convenient refrigerated power, so that the process is streamlined to the fullest. This work is in accordance with the measurements of the water temperature of the seas and oceans, at a depth of 2-3 meters, during the summer period. Depending on the temperature fluctuation, it has different values on the surface, but retains a constant value of 23-26 degrees at the indicated depth. Between the main parameters calculated in this study are the following: the mass flow of the refrigerant (qm), the total thermal power of the condenser (ΦRHE), total power input at the compressor (Pc) and Coefficient of Performance of the plant (COP). Considering that on board the ships, refrigerating effect might have different values, depending on the type of the ship, this study focuses on very clear criteria related to the cold production in optimum conditions. In this paper the refrigeration effect will take this three different value: 20 kW, 25 kW and 30 kW. On this bases will result three situations which will be analysed comparatively. Will be analysed the main values: the mass flow of the refrigerant, the total thermal power of the condenser, the power input of the compressor and the Coefficient of Performance. According to the above mentioned, will be possible to be indicate which is the best operating situation, among the three cases of study.

This paper presents the methodology for addressing health risk in the maritime domain. The study site is the Black Sea basin. Methodology: Risk assessment and analysis – a part of risk management; to show people what can happen before it happened; to create an environment to respond, not to create stress; to prepare the powers to react in case of events. Materials: Black Sea Basin, the tools of management and assessment of risk, factors of the environment/healthenvironment, professional illnesses and human factors. Results: identification the risks of systems and subsystems based on the indicators of hazards, choose the risk matrix, analyse the risk, prepare the risk management plan. Conclusions: If you control a number of similar workplaces containing similar activities, you can produce a model risk assessment reflecting the common hazards and risks associated with these activities.

The concept of green energy means the activity of generating the electrical or thermal energy required for a diverse range of consumers, from renewable and non-polluting energy sources, such as: photovoltaic or solar panels, wind turbines, biomass/biogas/biodiesel, hydrogen, batteries of combustion, wave / tidal energy, geothermal or hydroelectric etc. By choosing such sources, consumers will be able to support the development of more environmentally friendly hot water for hygienic / household use, electricity or heating the house. Given that the cost of depreciation of the investment is not too long, then for us all, the implementation of green technologies can be a profitable investment not only for the industrial consumers but also for the domestic energies, thereby increasing energy independence but at the same time, reducing the cost of bills for certain utilities such as ones.

The performance of any system on board ship is specifically identified with its reliability. So as to get the best out of marine motors, it is critical to screen their performances and take measures to accomplish productive combustion. As a result of heat gains on board ships from engine rooms and crew, the increase in humidity as well as due to the various releases of gases from on board systems, room air deteriorates, requiring replacement and its processing through the HVAC (heat, ventilation and air conditioning) system. The combustion process in diesel engines is the most complex and difficult to address. HVAC system has a definitory role for diesel engine combustion.

The electromagnetic field has two components of it, relative and interdependent, namely the electric field and the magnetic field. The electromagnetic field is a form of existence of matter, determined by the weighting actions of electromagnetic nature on the bodies in its area of action. The electromagnetic field consisting of static magnetic field and electric field varies in time with frequencies up to 300 GHz. The effects of the electromagnetic field are measurable and are thermal effects and mechanical effects. The mode of manifestation of magnetic fields is not perceivable by man, they are not accessible to human senses.