Assessment of array shape of tidal stream turbines on hydro-environmental impacts and power output
Assessment of array shape of tidal stream turbines on hydro-environmental impacts and power output
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DOI：
10.1016/j.renene.2012.01.106
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发表时间：
2012-08-01
期刊：
影响因子：
8.7
通讯作者：
Falconer, Roger A.
中科院分区：
文献类型：
--
作者：
Ahmadian, Reza;Falconer, Roger A.
本研究探讨了潮汐流涡轮机阵列的布局对功率输出和水文环境影响阵列的意义，使用研究中心广泛使用的开源水文环境模型，即DIVAST（深度综合速度和溶质运输），作者修改了该模型，将涡轮机作为动量汇，以模拟涡轮机阵列在沿海环境中的影响。为此，对位于塞文河口和布里斯托海峡的三种不同的涡轮机阵列布局进行了建模和比较。包括布里斯托海峡在内的河口长约200公里，典型的春季潮差超过14米，是世界上第三大潮汐升降区，河口的春季潮流远远超过2米/研究表明，阵列对水位和与洪水风险相关的最高水位的影响是非常小。而潮汐涡轮机阵列对潮流的影响更为显著。流速场，悬浮泥沙水平和粪便细菌水平增加的阵列的一侧，而他们都减少了上游和下游的阵列。该模型通过比较各种阵列的估计功率输出的差异（包括和不包括模型中涡轮机提取能量的影响），表明了在评估潜在功率输出时包括涡轮机和气流的相互作用的重要性。此外，该模型显示，在小潮落潮期间的可用功率显著小于（
This study investigates the significance of the layout of an array of tidal stream turbines on the power output and the hydro-environmental impacts array using the Research Centre's widely used open-source hydro-environmental model, namely DIVAST (Depth Integrated Velocities And Solute Transport), which was modified by the authors to include turbines as momentum sinks, to simulate the impact of an array of turbines in a coastal environment. For this purpose, three various layouts of an array of turbines, having the same number of turbines and located in the Severn Estuary and Bristol Channel, were modelled and compared. The estuary, including the Bristol Channel, is approximately 200 km long and with a typical spring tidal range of over 14 m has the third highest rise and fall of tide in the world, with the spring tidal currents in the estuary being well in excess of 2 m/s.The study has demonstrated that the impacts of the arrays on the water levels and the maximum water levels which are associated with the flood risk were very small. However, the tidal currents were more significantly influenced by the tidal turbine arrays. The flow velocity field, suspended sediment levels and faecal bacteria levels were increased on the side of the arrays, whilst they were reduced both upstream and downstream of the arrays. The model showed the significance of including the interaction of the turbines and the flow in assessing the potential power output by comparing the discrepancy in the estimated power output of the various arrays, both with and without the inclusion of the impact of energy extraction by the turbines in the model. Moreover, the model showed that the available power during a neap ebb tide was significantly less than (