Wave power extraction from a tubular structure integrated oscillating water column
Wave power extraction from a tubular structure integrated oscillating water column
复制标题
DOI：
10.1016/j.renene.2020.01.008
复制
发表时间：
2020-05
期刊：
影响因子：
8.7
通讯作者：
Siming Zheng;Guixun Zhu;D. Simmonds;D. Greaves;G. Iglesias
中科院分区：
文献类型：
--
作者：
Siming Zheng;Guixun Zhu;D. Simmonds;D. Greaves;G. Iglesias
将波浪能转换器与防波堤、桩和海上风力涡轮机等海洋结构集成在一起，在波浪能提取、建造成本和生存能力方面都有好处。本文研究了振荡水柱与垂直管状结构的耦合问题。OWC室由管状结构封闭，其浸没侧部分向海开放。当海浪传播通过该装置时，安装在腔室顶部的空气涡轮机可以被驱动以提取波浪能。基于势流理论和特征函数匹配法建立了有限水深条件下该装置的波浪散射和辐射分析模型。计算了波浪激励体积通量、水动力系数、最佳涡轮机阻尼和功率捕获因子。在成功验证后，该模型被应用于研究的影响的半径和有限壁厚的管状结构，开口的大小和位置的波能提取。我们发现，一个较薄的腔室壁厚提供了一个更广泛的功率捕获因子响应的主要频带方面的波功率提取的好处，并通过增加垂直开口的高度，可以实现更广泛和更高的捕获因子带。
Integrating wave energy converters with marine structures such as breakwaters, piles, and offshore wind turbines offers benefits in terms of wave power extraction, construction costs, and survivability. In this paper, the integration of an oscillating water column(OWC) into a vertical tubular structure is considered. The OWC chamber is enclosed by the tubular-structure with its submerged side partially open to the sea. As ocean waves propagate through the device, an air turbine installed at the top of the chamber can be driven to extract wave power. An analytical model based on potential flow theory and the eigen-function matching method is developed to solve the wave scattering and radiation problems of the device in finite water depths. Wave excitation volume flux, hydrodynamic coefficients, optimal turbine damping and power capture factor are evaluated. Upon successful validation, the model is applied to investigate the effect of the radius and finite wall thickness of the tubular-structure, the size and position of the opening on wave power extraction. We find that a thinner chamber wall thickness offers benefits to wave power extraction in terms of a broader primary band of power capture factor response, and that a broader and higher capture factor band can be achieved by increasing the height of the vertical opening.