Project

ROmanian MArine Renewable solutions (ROMAR)

Goal: The present project is focused on the renewable energy sources located in the Romanian nearshore area, in order to establish the viability of a wind, wave or hybrid wind-wave project, respectively. For accomplishing these targets, the project will be focused on three main directions. The first one is related to the assessment of an offshore wind farm performance by considering different spatial configurations and some state-of-the-art wind generators, which currently operate on the European sites. Following these results, will be possible to establish the most suitable wind farm configuration for the Romanian nearshore by taking into account various parameters, such as: cost investment or efficiency. Another important direction is related to the assessment of the wave energy and of the performances of various Wave Energy Converters (WECs) which could operate in the vicinity of the Romanian nearshore. In this case, the viability of various onshore solutions to be integrated into the existing harbor infrastructure or costal protection systems will be discussed together with the possibility to couple a wave farm to an offshore wind project. Since the Romanian coastal area is severely affected by the erosion processes, in the final part of the project the aim is to identify an optimal solution in order to reduce the impact of the wave energy in some key nearshore sectors, such as the Danube Delta. These studies can be considered to be opportune, since from the previous works it was established that the western part of the Black Sea presents more important wind and wave resources. This region is also defined by a shelf area, suitable for a marine farm if we consider the current trends reported by the European offshore wind industry. Moreover, during the recent years various renewable projects are started to emerge in enclosed basins such as the Mediterranean Sea, being also reported plans to develop offshore wind farms in the vicinity of the Bulgarian coasts.

Date: 15 May 2018 - 30 April 2020

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Project log

Florin Onea
added a research item
The aim of the present work is to provide an overview of the possible implications involving the influence of a generic marine energy farm on the nearshore processes. Several case studies covering various European coastal areas are considered for illustration purposes. These include di�erent nearshore areas, such as the Portuguese coast, Sardinia Island or a coastal sector close to the Danube Delta in the Black Sea. For the case studies related to the Portuguese coast, it is noted that a marine energy farm may reduce the velocity of the longshore currents, with a complete attenuation of the current velocity for some case studies in the coastal area from Leixoes region being observed. For the area located close to the Danube Delta, it is estimated that in the proposed configuration, a marine energy farm would provide an e�cient protection against the wave action, but it will have a relatively negligible impact on the longshore currents. Summarizing the results, we can conclude that a marine energy farm seems to be beneficial for coastal protection, even in the case of the enclosed areas, such as the Mediterranean or Black seas, where the erosion generated by the wave action represents a real problem.
Florin Onea
added a research item
A particular aspect of the maritime operations involves available weather intervals, especially in the context of the emerging renewable energy projects. The Black Sea basin is considered for assessment in this work, by analyzing a total of 30-years (1987-2016) of high-resolution wind and wave data. Furthermore, using as reference, the operations thresholds of some installation vessels, some relevant case studies have been identified. The evaluation was made over the entire sea basin, but also for some specific sites located close to the major harbors. In general, the significant wave heights with values above 2.5 m present a maximum restriction of 6%, while for the western sector, a percentage value of 40% is associated to a significant wave height of 1 m. There are situations in which the persistence of a restriction reaches a maximum time interval of 96-h; this being the case of the sites Constanta, Sulina, Istanbul or Burgas. From a long-term perspective, it seems that there is a tendency of the waves to increase close to the Romanian, Bulgarian, and Turkish coastal environments-while an opposite trend is expected for the sites located on the eastern side.
Florin Onea
added a research item
A general assessment of the wind energy potential from the eastern part of Romania was carried out in this work by taking into account onshore and offshore wind conditions. First, a perspective of the importance of the renewable resources into the Romanian electricity system was provided, from which was noticed that the wind production cover almost 15% from the demand (reported to 2017). From the analysis of the wind data significant differences were noticed between the onshore and offshore regions, the last one presenting more important wind resources, that significantly increase during the winter time (with almost 22%). According to the performance reported by an offshore wind turbine (rated at 3 MW), such generator will operate at full capacity in a maximum 9% from the time, if we consider a hub height of 119 m.
Florin Onea
added an update
WECANet Wave energy training course, Varna, Bulgaria, 18-22 March 2019.
 
Florin Onea
added an update
Best presentation award - ICACER 2019 (Session 3 - Renewables)
 
Florin Onea
added 2 research items
In the present work, the relationship between Romanian wave power and the distance to the shoreline is evaluated, by taking also into account the performances of some wave energy converters. Several reference sites located on northern, centre and southern part of this area were taken into account, the wave energy being assessed at 5 km, 15 km and 30 km from the shore. More important resources were noticed close to the Vama Veche (in south) were an average of 4.27 kW/m is reported offshore. As we go from shore to offshore, the wave variations may reach a maximum of 7.7% in the case of the Navodari site (centre), while a 3.3% is expected for Vama Veche. In the case of the wave generators, three types of systems (Seabased, Pelamis and Wave Dragon) were considered, that cover a rated capacity ranging from 15 kW to 7000 kW. For the Saint George site (north), the power production is insignificant being located close to zero, while in terms of the capacity factor a maximum of 0.12% may be expected from the Seabased system. The capacity factor significantly increases as we go to south, being reported during winter time values close to 3% for Pelamis system or 6% in the case of Seabased, respectively.
The aim of the present work is to assess the electricity production coming from an offshore wind farm that may operate in the northern part of the Romanian coastal area. In the first part, a complete description of the Romanian energy sector is presented considering the time interval from January 2008 to December 2018. In general, the electricity sold is negative (exports exceed imports), with the mention that a significant contribution comes from hydroelectric and coal generation. It is important to mention that, if one of these two sectors will no longer perform on full capacity, the electricity balance will be shifted to the electricity imports. As for the wind energy, the average values from the vicinity of Sulina site may vary between 5.6 m/s and 8 m/s depending on the season, these results being reported at a wind turbine level (80 m). By using an offshore wind farm which replicates the Greater Gabbard project (504 MW), England, was possible to estimate the annual energy production and to indicate the expected impact on the energy sector. For example, a single wind farm may cover 1.7% of the total production, which may be further associated with 9.6% from nuclear, 7.6% from hydroelectric or 6.4% from coal, respectively.
Florin Onea
added an update
We are inviting submissions to a Special Issue of the Journal of Marine Science and Engineering on the subject of “Renewable Energy Extraction in the Marine Environments and Its Coastal Impact.” Marine areas are among the most sustainable environments from the point of view of energy potential. Historically, these areas have significantly influenced global economic growth through ship transport, and current technological developments recommend them as very competitive in the context of renewable energy resources. Various research directions are being pursued at the moment, among which we can mention the possibility of developing co-located projects or assessing the role of the marine farms in coastal protection. This Special Issue is intended to provide a forum for academic researchers and technical professionals to exchange their recent works on technological advancements.
Deadline for manuscript submissions: 31 December 2019
 
Florin Onea
added an update
Best Prezentation Award - ICPRE 2018 (Section 1 - Renewable Energy and Clean Energy), Berlin, Germany
 
Florin Onea
added a research item
The objective of the present work is to assess the potential of the Black Sea wind conditions in the vicinity of the coastal areas, and also to estimate the configuration of a wind farm which may be implemented in this environment. The wind conditions were evaluated by using the reanalysis data coming from the ERA-Interim project for the interval 1998-2017. The datasets with a spatial resolution of 0.75o x 0.75o (≈ 82.5 km x 82.5 km) were processed. Several sites deployed along the center and western coastlines (from Sinop to Novorossiysk) were taken into account, being associated to a water depth which does not exceed 40 m, while the distance between each reference site was set to 100 km. The sites were chosen considering also the spatial distribution of the wind resources established in previous studies, when other wind fields were considered. In those studies was noticed that the center and western part of this basin seems to present a higher potential for a renewable energy project. In the final part of this work, a direct comparison between the wind conditions reported by some European wind projects and the ones from the Black Sea sites was carried out in order to highlight any similarities. In the same time, from this analysis was possible to estimate some potential wind farm configuration which may be taken into account for this target area. Based on these results, we need to mention that the Black Sea is a dynamical environment with relevant wind resources for a wind project, especially in the western part of this basin which is also defined by a shelf area characterized by a lower water depth (<50 m).
Florin Onea
added 2 research items
In the present work is assessed the Romanian wind energy potential reported along the coastline environment for the time interval from 1979 to 2017 (39 years). The sites used for evaluation were selected in the vicinity of some representative beach sectors, such as Sulina, Saint George, Navodari or Mangalia, respectively. As a first step, the most relevant wind parameters for a renewable project were evaluated using data provided by the European Center for Medium-Range Weather Forecasts (ERAInterim project). Based on these results, some representative spatial and seasonal patterns of the local conditions were highlighted. In the second part of this work, is assessed the efficiency of some state-of-the-work wind turbines which may operate in this region. In the final part, the present results were compared with the wind characteristics from the vicinity of some operational wind projects operating close to the shore, in order to establish a wind farm configuration which may operate on the Romanian area.
The main objective of this work was to evaluate the nearshore wind resources in the Black Sea area by using a high resolution wind database (ERA-Interim). A subsequent objective was to estimate what type of wind turbines and wind farm configurations would be more suitable for this coastal environment. A more comprehensive picture of these resources was provided by including some satellite measurements, which were also used to assess the wind conditions in the vicinity of some already operating European wind projects. Based on the results of the present work, it seems that the Crimea Peninsula has the best wind resources. However, considering the current geopolitical situation, it seems that the sites on the western part of this basin (Romania and Bulgaria) would represent more viable locations for developing offshore wind projects. Since there are currently no operational wind projects in this marine area, some possible configurations for the future wind farms are proposed.
Florin Onea
added a research item
The main objective of the present work is to provide a more comprehensive picture of the Romanian energy system, a special attention being given to the emerging renewable sources. As a first step, different indexes will be considered to highlight the structure of the electricity portfolios, from which the authors mention electricity access and consumption and the dioxide emissions. The obtained results will be discussed at both regional and European levels, by taking also into account the share of electricity coming from renewable sources. If one discusses about renewables, it is important to mention that most of the Romanian projects are located onshore, but since there is access to the Black Sea, the benefits coming from a marine project need also to be discussed. Finally, the authors conclude that the Romanian energy market is defined by various opportunities and challenges and, using the renewable sources, it will be possible to build a sustainable energy industry.
Florin Onea
added a project goal
The present project is focused on the renewable energy sources located in the Romanian nearshore area, in order to establish the viability of a wind, wave or hybrid wind-wave project, respectively. For accomplishing these targets, the project will be focused on three main directions. The first one is related to the assessment of an offshore wind farm performance by considering different spatial configurations and some state-of-the-art wind generators, which currently operate on the European sites. Following these results, will be possible to establish the most suitable wind farm configuration for the Romanian nearshore by taking into account various parameters, such as: cost investment or efficiency. Another important direction is related to the assessment of the wave energy and of the performances of various Wave Energy Converters (WECs) which could operate in the vicinity of the Romanian nearshore. In this case, the viability of various onshore solutions to be integrated into the existing harbor infrastructure or costal protection systems will be discussed together with the possibility to couple a wave farm to an offshore wind project. Since the Romanian coastal area is severely affected by the erosion processes, in the final part of the project the aim is to identify an optimal solution in order to reduce the impact of the wave energy in some key nearshore sectors, such as the Danube Delta. These studies can be considered to be opportune, since from the previous works it was established that the western part of the Black Sea presents more important wind and wave resources. This region is also defined by a shelf area, suitable for a marine farm if we consider the current trends reported by the European offshore wind industry. Moreover, during the recent years various renewable projects are started to emerge in enclosed basins such as the Mediterranean Sea, being also reported plans to develop offshore wind farms in the vicinity of the Bulgarian coasts.