Reflection Phenomena in Underground Pumped Storage Reservoirs
Reflection Phenomena in Underground Pumped Storage Reservoirs
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DOI：
10.3390/w10040504
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发表时间：
2018-04
期刊：
影响因子：
3.4
通讯作者：
E. Pummer;H. Schüttrumpf
中科院分区：
文献类型：
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作者：
E. Pummer;H. Schüttrumpf
通过水力发电储存能量会在相连的水库中产生自由表面水波。其原因是不同海拔水库之间的水的流动，这是电能存储所必需的。目前，可再生能源的扩张需要开发快速、灵活的储能系统，其中经典抽水蓄能电站是唯一经过技术验证且具有成本效益的技术，并且使用最多。带有地下水库的地下抽水蓄能电站可能是一种替代方案，而不是传统的抽水蓄能电站（水库位于地表）。它们不受地形影响，并且表面积要求低。在出现环境问题、居民担忧和地形表面无法使用的情况下，这对于储能扩展来说是一个巨大的优势。然而，由于稳定性和空间原因，地下抽水蓄能电站的水库在设计上与传统水库有所不同。水力设计对于确保其令人满意的水力性能至关重要。本文提出了一种混合模型研究，这里将其定义为物理模型和数值模型的结合，以利用各自方法的优点并弥补各自方法的缺点。它显示了对具有较大长高比的通风地下水库系统中的波浪的分析，考虑了具有很大比例的可再生能源的能源供应系统的新操作方面。储层多面且狭窄的设计导致了复杂的自由表面流动；例如，出现波状孔和破裂孔。结果显示，由于不渗透的储层边界导致波反射导致波高过高。因此，他们的知识对于水库的成功运营和建设设计至关重要。
Energy storage through hydropower leads to free surface water waves in the connected reservoirs. The reason for this is the movement of water between reservoirs at different elevations, which is necessary for electrical energy storage. Currently, the expansion of renewable energies requires the development of fast and flexible energy storage systems, of which classical pumped storage plants are the only technically proven and cost-effective technology and are the most used. Instead of classical pumped storage plants, where reservoirs are located on the surface, underground pumped storage plants with subsurface reservoirs could be an alternative. They are independent of topography and have a low surface area requirement. This can be a great advantage for energy storage expansion in case of environmental issues, residents’ concerns and an unusable terrain surface. However, the reservoirs of underground pumped storage plants differ in design from classical ones for stability and space reasons. The hydraulic design is essential to ensure their satisfactory hydraulic performance. The paper presents a hybrid model study, which is defined here as a combination of physical and numerical modelling to use the advantages and to compensate for the disadvantages of the respective methods. It shows the analysis of waves in ventilated underground reservoir systems with a great length to height ratio, considering new operational aspects from energy supply systems with a great percentage of renewable energies. The multifaceted and narrow design of the reservoirs leads to complex free surface flows; for example, undular and breaking bores arise. The results show excessive wave heights through wave reflections, caused by the impermeable reservoir boundaries. Hence, their knowledge is essential for a successful operational and constructive design of the reservoirs.