Numerical model simulations for optimisation of tidal lagoon schemes
Numerical model simulations for optimisation of tidal lagoon schemes
复制标题
潮汐泻湖方案优化的数值模型模拟
DOI：
10.1016/j.apenergy.2015.12.079
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发表时间：
2016
期刊：
影响因子：
11.2
通讯作者：
B. Bockelmann
中科院分区：
文献类型：
--
作者：
A. Angeloudis;R. Ahmadian;R. Falconer;B. Bockelmann
这项研究考虑了英国北威尔士海岸提出的一些沿海潮汐泻湖的环境影响和发电潜力。最初，根据区域水深数据修改蓄水形状、水轮机和闸门位置。在给定水轮机和闸门规格的基础上，采用改进的0维方法来优化泻湖的运行。反过来，一个基于非结构三角网格的二维数值模型已被改进，以模拟水动力过程，最初没有泻湖，随后在存在泻湖的情况下。水动力模型采用TVD有限体积法求解二维浅水方程，基于二阶精度的时空格式。通过与现有数据进行比较，在再现该区域遇到的既定条件方面，表现明显令人鼓舞。在模型中加入潮汐泻湖似乎对该地区的水流结构有相当大的影响，这是通过在闸门和水轮机附近诱导高速加速来实现的，这取决于潮汐周期的阶段。考虑到双向发电制度，概述了可以最大限度地减少潮间带地区的损失，这是通过退潮发电作业对这类计划的环境影响的一个主要关切。特别侧重于0-D和2-D模拟结果之间的比较，这是以前没有报道的一个方面。随着环礁湖项目规模的扩大，对模型的预测出现了分歧，但强调的是，在进行更复杂的数值模式模拟之前，可以利用0-D方法在设计的初始阶段对过程进行优化。
This study considers environmental impacts and the power production potential of a number of coastally attached tidal lagoons, proposed along the North Wales coast, UK. Initially, the impoundment shape, turbine and sluice gate locations were modified according to the regional bathymetric data. A refined 0-Dimensional approach was implemented to optimise the lagoon operation, based on given turbine and sluice gate specifications. In turn, a two-dimensional numerical model, based on an unstructured triangular mesh, has been refined to simulate the hydrodynamic processes, initially without and subsequently in the presence of the lagoons. The hydrodynamic model adopts a TVD finite volume method to solve the 2D shallow water equations, based on a second-order accurate spatial and temporal numerical scheme. An encouraging performance is apparent in reproducing the established conditions encountered in the region through comparisons against available data. The incorporation of tidal lagoons in the model appears to have a considerable effect on the flow structure in the region, by inducing high velocity accelerations near the sluices and turbines, depending on the stage of the tidal cycle. Considering a two-way generation regime, it is outlined that the loss of intertidal regions can be minimised, which is a major source of concern with regards to the environmental impact of such schemes through an ebb-generation operation. Particular focus is directed towards the comparisons between the 0-D and 2-D modelling results, an aspect which has not been reported previously. Predictions of the models diverge as the scale of the lagoon project increases, but it is highlighted that the 0-D methodology can be utilised for the optimisation of the processes in the initial stages of design before proceeding to more sophisticated numerical model simulations.