Wave power

About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.

Construction of the Numerical Wave Databases Anemoc-2 on the Mediterranean Sea and the Atlantic Ocean Through Hindcast Simulations Over the Period 1979–2010

Abstract: In the 2000s, CEREMA and EDF R&D have been collaborating to build two continuous wave databases through numerical hindcast simulations: one covers the Atlantic Ocean, the other the Mediterranean Sea. These databases are called ANEMOC. Over the last three years, new versions of the two numerical atlases have been created, in collaboration with Saint-Venant Laboratory. Several improvements have been made in the construction of ANEMOC-2: the Atlantic model covers a larger area, the temporal coverage of the atlases is larger (32 years from 1979 to 2010), direction and frequency discretization is finer, wind forcing is finer both in time (1 h resolution) and space (0.312) and the computation meshes are refined to reach 800–1000 m along the French coast. The simulations are performed with the numerical wave model TOMAWAC, a third generation spectral model, which is a module of the TELEMAC-MASCARET open source suite. The databases are calibrated with altimeters measurements, and validated in a second step against uncorrelated buoys measurements. The databases provide several wave parameters: significant wave height, mean, peak and energy period, mean direction, angular wave spreading, and wave power. More results regarding calibration and validation are presented for the Mediterranean wave model. Results of both Mediterranean and Atlantic databases are then presented. Their analyses by comparison with altimeter and buoy measurements provide an assessment of many of their characteristics. Finally, ANEMOC-2 ability to reproduce intense wave conditions is highlighted by the study of two storm events.

Climatic trends in the fluctuations of wind waves power in the Black Sea

Abstract: The research presented in this work allowed us to construct climatic fields of wind wave and swell over the entire Black Sea in the period from 1979 to 2018. The results are based on the calculation of climatic characteristics of the medium and maximum wave power. Possible components of the trend in the climatic fluctuations of the average and maximum wave powers were determined. The main research method is numerical modeling. It has been established that there are statistically significant positive trend components in the climatic fluctuations of the average and maximum surface waves. The greatest contribution to the formation of the wave climate is made by the storm conditions in January, March, and October. The increase in the power of the average waves is observed in the northeastern part of the sea (approximately 0.4 percent per year). The maximum power values tend to increase also in the northeastern region (6–7%/year), and in the southern region west (6–7%/year) and east (5–6%/year) of Cape Sinop.

Maritime renewable energy transfer device and system

Abstract: The invention relates to a maritime renewable energy transfer device which comprises an ocean platform and a wave energy generator, wherein the wave energy generator is arranged on the platform surface of the ocean platform, preferably, the wave energy generator comprises a wave floating body and a mechanical driving and generating component; the mechanical driving and generating component is arranged on the platform surface; the wave floating body comprises a floating body and a straight rack gear arranged on the floating body; the mechanical driving and generating component comprises a straight rack gear limiting component, a first rotating shaft and a first gear arranged on the first rotating shaft; the floating body is positioned below the platform surface; the straight rack gear passes through the platform surface from bottom to top and is meshed with the first gear; the straight rack gear limiting component supports a limiting straight rack gear; and the ocean platform is a tension leg type ocean platform. The invention also provides a maritime renewable energy transfer system for using wind power and wave power to generate power in a combined grid. The invention is ingeniously designed, can effectively utilize maritime renewable energy and provide energy for ocean development away from the land, and is safe, stable and reliable and convenient for engineering implementation and daily maintenance.

The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance

Abstract: Currently, the techno-economic performance of Wave Energy Converters (WECs) is not competitive with other renewable technologies. Size optimization could make a difference. However, the impact of sizing on the techno-economic performance of WECs still remains unclear, especially when sizing of the buoy and Power Take-Off (PTO) are considered collectively. In this paper, an optimization method for the buoy and PTO sizing is proposed for a generic heaving point absorber to reduce the Levelized Cost Of Energy (LCOE). Frequency domain modeling is used to calculate the power absorption of WECs with different buoy and PTO sizes. Force constraints are used to represent the effects of PTO sizing on the absorbed power, in which the passive and reactive control strategy are considered, respectively. A preliminary economic model is established to calculate the cost of WECs. The proposed method is implemented for three realistic sea sites, and the dependence of the optimal size of WECs on wave resources and control strategies is analyzed. The results show that PTO sizing has a limited effect on the buoy size determination, while it can reduce the LCOE by 24% to 31%. Besides, the higher mean wave power density of wave resources does not necessarily correspond to the larger optimal buoy or PTO sizes, but it contributes to the lower LCOE. In addition, the optimal PTO force limit converges at around 0.4 to 0.5 times the maximum required PTO force for the corresponding sea sites. Compared with other methods, this proposed method shows a better potential in sizing and reducing LCOE.