Hornberg basin
| Hornberg basin | |||||
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| Coordinates | 47 ° 39 '33 " N , 7 ° 57' 40" E | ||||
| Data on the structure | |||||
| Construction time: | 1970-1975 | ||||
| Height above valley floor: | 65 m | ||||
| Height above foundation level : | 65 m | ||||
| Height of the structure crown: | 1050 m above sea level NHN | ||||
| Building volume: | 2 200 000 m³ | ||||
| Crown length: | 1 715 m | ||||
| Crown width: | 5 m | ||||
| Slope slope on the air side : | 1: 1.6 | ||||
| Slope slope on the water side : | 1: 1.6 | ||||
| Data on the reservoir | |||||
| Altitude (at congestion destination ) | 1048 m above sea level NHN | ||||
| Water surface | 17 ha | ||||
| Reservoir length | 700 m | ||||
| Reservoir width | 300 m | ||||
| Storage space | 4.4 million m³ | ||||
The Hornberg basin is the upper basin of the Wehr pumped storage power plant , the lower basin of which is the Wehratalsperre . It is located near Herrischried (Hornberg district) and the town of Wehr in the Waldshut district in Baden-Württemberg on the crest of the Lange Eck, the highest mountain in the Hotzenwald . It was put into operation in 1975, is used solely to generate electricity in pumped storage operation and is operated by Schluchseewerk AG .
A few hundred meters south of the Hornberg Basin, Hornberg Basin II was to be built as part of the future Atdorf pumped storage power plant by 2021. With a length of almost 1 km and 9 million m³ of storage space, it should be significantly larger than the existing Hornberg basin. On October 11, 2017, EnBW announced that it would no longer pursue the project.
Building
The Hornberg basin is with its storage target at 1048 m above sea level. NHN the highest dam in Germany. The 700 m long, 300 m wide and 46 m deep basin has a ring dam with the shape of a stadium (semicircles with straight lines). The dam consists of rock and earth. It is sealed on the inside with asphalt concrete and the outside is protected from erosion by the greenery . There are two towers in the basin, the inlet tower and the elevator tower. Both towers are connected to each other at their head end. Access to the elevator tower is via a corridor that runs under the bottom of the pool.
Pump storage operation
The hydropower plant with the moated castle is designed as a cavern power plant . The total nominal electrical output of the four turbines is 910 MW , while pumping is 980 MW. In pumping operation, a volume flow of up to 144 m³ / s is achieved, which means 7.9 hours are needed to transport 4.1 million m³ of water from the lower basin 625 m below into the Hornberg basin. Its total capacity is sufficient to generate electricity for 6.8 hours in full load turbine operation ( expansion water volume 180 m³ / s). This lowers the water level in the reservoir by 36 m.
See also
literature
- Festschrift Hornbergstufe of the Schluchseewerk AG . November 1976
- Peter Franke, Wolfgang Frey: Dams in the Federal Republic of Germany . DNK - DVWK 1987, ISBN 3-926520-00-0 .
Individual evidence
- ↑ EnBW is reorganizing the priority of storage projects: The Atdorf pumped storage project will not be pursued any further
- ↑ a b Schluchseewerk: Technical data (PDF; 137 kB)