Tidal resource and interactions between multiple channels in the Goto Islands, Japan

International Journal of Marine Energy Pub Date : 2017-09-01 DOI:10.1016/j.ijome.2017.09.002

S. Waldman , S. Yamaguchi , R. O’Hara Murray , D. Woolf

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引用次数: 15

Abstract

The Goto Islands in Nagasaki Prefecture, Japan, contain three parallel channels that are suitable for tidal energy development and are the planned location for a tidal energy test centre. Energy extraction is added to a 3D numerical hydrodynamic model of the region, using a sub-grid momentum sink approach, to predict the effects of tidal development.

The available resource with first-generation turbines is estimated at 50–107 MW peak output. Spreading turbine thrust across the whole cross-section to prevent bypass flow results in a 64% increase in peak power in one channel, highlighting the importance of 3D over 2D modelling.

The energy available for extraction in each strait appears to be independent of the level of extraction in other straits. This contrasts with theoretical and numerical studies of other multi-channel systems. The weak interactions found in this study can be traced to the hydraulic effects of energy extraction not extending to neighbouring channels due to their geometry.

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日本后藤群岛的潮汐资源和多渠道间的相互作用

日本长崎县的后藤群岛包含三个平行的通道，适合潮汐能开发，是潮汐能测试中心的计划地点。利用亚网格动量汇方法，将能量提取添加到该地区的三维数值水动力模型中，以预测潮汐发展的影响。第一代涡轮机的可用资源估计为50-107 MW峰值输出。在整个横截面上分散涡轮推力以防止旁路流动，导致一个通道的峰值功率增加64%，突出了3D比2D建模的重要性。每个海峡中可供提取的能量似乎与其他海峡的提取水平无关。这与其他多通道系统的理论和数值研究形成了对比。本研究中发现的弱相互作用可以追溯到能量提取的水力效应，由于它们的几何形状而没有延伸到邻近的通道。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Marine Energy

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