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Sulina channel is one of the three arms of the Danube, through which the river outflows into the Black Sea. At the same time, this is an important navigation waterway, since it is the main entrance from the Black Sea in the seventh Pan-European transportation corridor, represented by the Maine-Rhine-Danube navigation system. Hence, high navigation traffic is noticed, which was significantly increased in the last years. On the other hand, this area often faces severe weather conditions with high gradients in the en...

Global climate change and the need to transition to clean energy sources have brought green hydrogen to the forefront of regional and international energy strategies. Green hydrogen offers a low-carbon solution that can support decarbonization in the heavy industries, transportation, and industry sectors, and renewable energy sources can be integrated into its production. The Danube River is one of the primary hydrological axes in Central and Southeastern Europe, playing a strategic role in the region's energy and...

One of the most significant inland waterway corridors on the continent, the Danube River, spans 2,850 kilometers across ten European nations, serving as a vital link between Western and Eastern Europe. Its ports serve as key hubs for the movement of goods, energy resources, and passengers, linking inland navigation with rail, road, and maritime transport routes. This paper provides a comprehensive and detailed assessment of the entire Danube port network, combining geographical, economic, and operational perspecti...

Hydrogen integration represents a promising strategy for decarbonizing Floating Production, Storage and Offloading (FPSO) operations, which traditionally rely on gas turbines and diesel generators. This study proposes a hybrid FPSO concept combining renewable energy generation with onboard hydrogen production, storage, and utilization. The system emphasizes green hydrogen produced by renewable-powered electrolysis of desalinated seawater, supported by blue hydrogen from associated gas reforming with carbon capture...

The paper will provide an overview of platforms and their impact in the context of climate change on the seas and oceans. It discusses the types of platforms, and the technologies used to improve performance in the face of severe weather and sea level rise. The proposed work emphasizes the importance of integrating innovative solutions to improve the offshore industry. Analysis conducted so far highlight different types of platforms, classified according to their specific use and structural characteristics, highli...

As the offshore oil and gas industry faces mounting pressure to reduce its carbon footprint, Floating Production, Storage and Offloading (FPSO) units are emerging as critical platforms for implementing clean energy innovations. This paper explores the potential for integrating renewable energy sources such as offshore wind, solar photovoltaic, and wave energy with advanced energy storage technologies, including lithium-ion batteries and hydrogen-based systems, within FPSO operations. The hybridization of power gen...

The Danube has been a traditional trade route in Europe since ancient times. Transport on the Danube has many economic and environmental advantages. By using the river as a transport route, logistics costs can be reduced, and delivery times optimized. Another feature of the Danube is its connection to the North Sea and maritime transport via the Rhine-Main-Danube Canal. In addition, waterborne transport produces less carbon dioxide than road or rail transport, helping to reduce environmental impact and promote sus...

The paper presents the possibility of floating photovoltaic farms on the reservoirs of the Olt river in Romania. For the analysis, a database with the solar irradiance evolution for one year in the four possible locations was created, using the PVGIS-SARAH2 database. The locations were chosen according to the surface area of the reservoir, geographical position, and possibility of connection to the national energy system. After the analysis, it was observed that during the cold season, the solar irradiance is high...

The unique lure of the America Cup Yachting race and the generous (read lavish) resources allocated to the research of the best ratio between design and performance in its history-loaded J-Class have defined some of the most spectacular ocean ships of the last hundred years. As a software modelling experiment, we have chosen to re-imagine an engineering journey, by redrawing with contemporary tools a graceful design of the 1930s: the Ranger F yacht that became the Lionheart vessel in 2010, after more than seven de...

In this study, based on a relatively high resolution wind database (ERA5), an assessment of the nearshore wind conditions in the western part of the Black Sea was conducted. From the reanalysis of the wind datasets provided by the ERA5 product, significant differences between the onshore and offshore wind power were identified, with the offshore regions being more resourceful than the onshore ones. Generally, the appeal of a site for a wind farm project is determined throughout a classification of the wind classes...

The present study's primary purpose is to evaluate and provide a more comprehensive, unbiased and helpful picture of the Romanian energy potential, highlighting the emerging renewable resources. Firstly, several indices are taken into consideration to underline the Romanian energy portfolio structure. The installed capacities and the country's power generation, carbon dioxide emissions, nuclear generation and consumption, and renewables power are among the critical indices used in this project. The data and result...

Data analysis for multiple data source locations on the wave climate regime of the Western Black Sea Coast is significantly required in port design as well in the delineations of the sheltered conditions, various emergency situations in maritime port areas. Under the extreme wave’s regime circumstances, there is a limited possibility to find certain low-energy areas for ships sheltering. The wave regime presents specificities of the wave field generated by the wind, especially in the port adjacent areas, under the...

Concerning the volume of goods conveyed, maritime transport is leading, and the last period proved that the trend is ascendant. Increased marine traffic leads to raised accident risks. Despite the state of the art marine technology and consistent regulations regarding navigation safety, naval accidents still occur and produce severe damage to assets, human life, and the marine environment. The paper presents the main types of naval accidents, focusing on the Black Sea basin, a sea with a complicated status regardi...

It is well known that more than 80% of globally traded goods are conveyed by maritime means of transportation. The shipping activities cannot be performed without emitting harmful gases and particles. The Black Sea basin has a consistent shipping activity accompanied by air emissions. The said basin also complicates the pollution with hydrocarbons or litter point of view, air emissions placing an additional burden on the Black Sea basin environment. We assessed the quantity of the main harmful components of the em...

The marine storms take place with a relatively high frequency at the Romanian Black Sea coast characterized by an active storm regime, especially in the winter times, when the reported values of wind speed at gust reach 40 m/s, producing the offshore waves high of 5-8 m and even more in the offshore area. Even the frequency of storm surges at the western Black Sea shore is relatively low comparing to other European seas, the North-East occurrence of such storms produces significant exposures. Due to the magnitude ...

The wind energy is substantially growing in the last decade, but the biggest challenge remains the prediction of the performances of the wind turbines. The increasing energy demand and climate changes forced us to commit quick decisions and to develop efficient solutions. One of the solutions can be repowering and significant changes in transmission systems to deliver it through the electric grid. Fantanele Cogealac is the largest onshore wind farm in Romania. The wind farm exist since 2012, so in at least 10 year...

The increase in the price for non-renewable energy resources has led to the finding of cheap alternative fuel solutions that can meet the growing demand for energy. The objective for the researchers is to use renewable energy as an alternative energy source to produce green energy. Over time, researchers have developed several types of shapes for the wind turbine: small, which have a generation capacity of 50-60 KW of power; On average, they have a capacity between 50-1500 KW and large, capable with a capacity of ...

Aboard a ship, the noise is a sum of several factors: equipment (engines, propellers, compressors), and the waves (if the Danube is very hectic), etc. The noise leads to discomfort for the crew. This paper studies the noises on 2 river vessels traveling on the Danube between Sulina and Budapest, in February and April 2019. The noises were measured with Blue Solo sonometer and analyzed with dBTRAIT Software. The determinations were made while running, in the engine room and in the control room. To check the noise l...

Waves represent the most important factor in the evolution of the coastal zones. One of the main causes leading to the wave formation is the movement of the air masses. A particular influence on the wave agitation regime in the littoral sector is exerted by the shore configuration, water depth, bottom relief and the formation of ice cover in winter. The scope of this paper is to analyze the historical data on the wind and waves in the Danube discharge area. The emphasis is on the maximum values of wave heights and...

Being an almost landlocked sea, the Black Sea has a particular situation regarding water exchange and circulation. Moreover, the anthropogenic pressure and shipping related activities worsen the situation of this sea from the pollution point of view. The introductory part of the article presents the role of the ballast water system onboard ships in a few words. Then, the paper presents the environmental context of the Black Sea with the focus on the wind and waves, factors which can affect the ship stability. The ...

Cogeneration equipment is generally classified according to the power source for the production of energy and the size of the electrical power. Low power cogeneration refers to those with powers up to 1 MWe, and those of medium power reach 25 ? 40 MWe. The overall efficiency of primary fuel use, under favorable conditions, can exceed 90%. Currently there are different solutions for low / medium power cogeneration, whose technologies are well developed. For a properly designed low power cogeneration the investment ...

In the international context of air pollution, the issue of air emissions is treated with various measure in different geographical areas in the world. Due to this necessity, international stakeholders were taking sets of regulations to reduce the effects of air emissions resulted from shipping activities. In Black Sea, because of geopolitical context, such measures have not yet been taken into account. The Black Sea area represents an important pole in the Eastern European trade and is reflected in the transit of...

The paper presents a methodology, based on artificial neural networks, for the offshore wind speed values long-term prediction. One of the most available renewable energy is the wind energy. The offshore wind turbines placement presents some benefits comparing with onshore one, like lower environmental impact and long-term stability of surroundings geometry. Of course, there are also drawbacks, like difficult set-up and maintenance or expensive transmission systems for the converted energy. Over all, the off-shore...

This paper analyses the vibrations and noises transmitted to the seafaring staff on a cargo river ship on the Danube between Novi Sad and Sulina. The ship has 5 people as sailing personnel: 1 captain, 1 coxswain, 1 mechanic, 2 sailors. The trip was made in the fall of 2018. Parallel measurements were made on the main bridge as well as inside the engines room, in three situations: ship leaving the shore, running and mooring maneuver. We measured and calculated the main vibration parameters: Vibration magnitude r.m....

In the precursory section of the paper, the authors succinctly present the Black Sea basin's oceanographic features with a focus on factors that can lead to naval accidents. The Black Sea basin is characterized, especially in winter months, by sudden storms, big waves, and winds, seriously affecting the ships and crews' safety. The said basin has also confined areas with pleasure crafts and commercial ships, offshore platforms with accompanying auxiliary fleet and underwater pipes and installations or shallow wate...

The conversion of forest to pastoral and agricultural management has important implications for carbon storage in soils. The stationary conditions of Neamtu catchment is characterized by an altitudinal difference between 270 - 1523 meters, 418 sq. km surface area, with notable differences of morpho-lithological, climatic, hydrological and biogeographical conditions reflected in both soil diversity and carbon content differences. This study aimed at calculating and comparing the estimated soil carbon stocks in diff...

In the context of climate and land use changes, the dynamics of soil carbon content became an interesting topic taking into account the role of soil organic matter for both plant growth and soil quality. Various analytical methods are accessible to find out the organic carbon concentration in soil with distinctive accuracy, each of them having own constraints and gains. The aim of the present study was to compare the experimental results obtained for soil organic carbon through several methods (wet dichromate oxid...