用于捕获海上风能和波浪能的新型混合装置的概念设计和优化

E. Faraggiana, M. Sirigu, A. Ghigo, E. Petracca, G. Mattiazzo, G. Bracco
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引用次数: 1

摘要

获取深海海上风能资源需要开发创新的解决方案,以降低能源成本。新技术提出了风能和波浪能的混合组合,以提高这些技术之间的协同作用,分担成本,如系泊和电气连接。本工作提出了一种新型的混合风能和波浪能系统,该系统将浮动海上风力涡轮机与三点吸收波能转换器(WECs)集成在一起。WECs是浮式结构不可分割的一部分,对系统的静水和动力稳定性有重要贡献。考虑到Pantelleria案例研究的圆柱形、半圆柱形和球形,它们的几何形状进行了优化。在降低结构成本和最大化WECs性能方面,具有最大半径和最低高度的圆柱形是最佳解决方案。内部流体静力稳定性工具和时域模型MOST用于优化WECs,在最后的模拟中,结合了Kriging代理模型和局部Nelder-Mead优化的元启发式遗传算法。同时用线性和可变马达流量的液压pto来估计自动控制系统的功率,以获得更真实的发电量。一般来说,混合装置比单独的浮动风力涡轮机更具竞争力,LCOE降低了11%。当考虑更多能量位点时,混合装置的性能可以进一步提高,因为WECs产生的能量更高。
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Conceptual design and optimisation of a novel hybrid device for capturing offshore wind and wave energy
Abstract The access to the offshore wind resource in the deep sea requires the development of innovative solutions which reduce the cost of energy. Novel technologies propose the hybrid combination of wind and wave energy to improve the synergy between these technologies sharing costs, such as mooring and electrical connexion. This work proposes a novel hybrid wind and wave energy system integrating a floating offshore wind turbine with three-point absorbers wave energy converters (WECs). The WECs are an integral part of the floating structure and contribute significantly to the hydrostatic and dynamic stability of the system. Their geometry is optimised considering a cylindrical, semi-cylindrical and spherical shape for the Pantelleria case study. The cylindrical shape with the largest radius and the lowest height is the optimal solution in terms of reducing structural costs and maximising the performance of the WECs. The in-house hydrostatic stability tool and the time domain model MOST are used to optimise the WECs, with a combined meta-heuristic genetic algorithm with the Kriging surrogate model and a local Nelder–Mead optimization in the final simulations. The power of the WECs is estimated with both linear and variable motor flow hydraulic PTOs to obtain a more realistic electrical power generation. Generally, the hybrid device proved to be more competitive than the floating wind turbine alone, with a LCOE reduction up to 11%. Performance of the hybrid device can be further improved when more energetic sites are considered, as the energy generated by the WECs is higher .
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来源期刊
Journal of Ocean Engineering and Marine Energy
Journal of Ocean Engineering and Marine Energy Engineering-Ocean Engineering
CiteScore
3.80
自引率
5.30%
发文量
47
期刊介绍: The Journal of Ocean Engineering and Marine Energy publishes original articles on research and development spanning all areas of ocean engineering and marine energy. The journal is designed to advance scientific knowledge and to foster innovative engineering solutions in the following main fields: coastal engineering, offshore engineering, marine renewable energy, and climate change and the resulting sea-level rise. Topics include, but are not limited to: Offshore wind energy technologyWave and tidal energyOcean thermal energy conversionOceanographical engineeringStructural mechanicsHydrodynamicsLinear and nonlinear wave mechanicsNumerical analysisMarine miningPipelines and risersComputational fluid dynamicsVortex-induced vibrationsArctic engineeringFluid-structure interactionUnderwater technologyFoundation engineeringAquacultural engineeringInstrumentation, full-scale measurements and ocean observational systemsModel testsHydroelasticityOcean acousticsGlobal warming and sea level riseOcean space utilizationWater qualityCoastal engineeringPhysical oceanographyThe journal also welcomes occasional review articles by leading authorities as well as original works on other emerging and interdisciplinary areas encompassing engineering in the ocean environment.
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