Analyse der Strömungsprozesse in unterirdischen Tiefspeichern von Pumpspeicherwerken mit Telemac2D

Kreyenschulte, Moritz; Schüttrumpf, Holger; Pummer, Elena

doi:10.1007/s35147-016-0003-2

Cited by 2 publications

(1 citation statement)

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“…Additional simulations checked the RANS simulation and the volume-of-fluid method. Therefore, a 2D simulation with the software TELEMAC2D, using the 2D shallow water equations and solving the water level directly showed useful results [28]. In addition, the results from a 3D simulation with the software DualSPHysics are comparable.…”

Section: Model and Scale Effectsmentioning

confidence: 88%

Reflection Phenomena in Underground Pumped Storage Reservoirs

Pummer

Schüttrumpf

2018

Water

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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.

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Section: Model and Scale Effectsmentioning

confidence: 88%