Langenprozelten Pumped Storage Station
Encyclopedia
The Langenprozelten Pumped Storage Station is a pumped storage power power station near Gemünden am Main
Gemünden am Main
Gemünden am Main is a town in the Main-Spessart district in the Regierungsbezirk of Lower Franconia in Bavaria, Germany and lies roughly 40 km down the Main from Würzburg.- Location :...

 at the [Main in the under-Frankish district Main Spessart (Bavaria
Bavaria
Bavaria, formally the Free State of Bavaria is a state of Germany, located in the southeast of Germany. With an area of , it is the largest state by area, forming almost 20% of the total land area of Germany...

), which went in service in 1976. The hydro-electric power plant has an output of 180 MW. It uses two Francis turbine
Francis turbine
The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts....

s.
The upper reservoir is nearly 300 meters higher than the lower reservoir and is connected with ist by one for about 1.3 km long pipes.
The maximum head is 320 m. The upper reservoir has a capacity of approximately 1.5 millions m³.

The Langenprozelten Pumped Storage Station produces only traction current and is an important peak load power station in the traction network for railways.
The maximum energy store ability amounts to 950 MWh. In the lower reservoir, waters of a creek are accumulated. The creek mostly leads no water in the summer. Therefore, if necessary, water is pumped from a further retention basin, which is situated 1.2 km below the lower reservoir. Both dams (of upper and lower reservoir) are rockfill embankment dam
Embankment dam
An embankment dam is a massive artificial water barrier. It is typically created by the emplacement and compaction of a complex semi-plastic mound of various compositions of soil, sand, clay and/or rock. It has a semi-permanent waterproof natural covering for its surface, and a dense, waterproof...

s with an asphaltic concrete external sealing.

Coordinates are those of the lower reservoir.
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