Lac Supérieur de Fully

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Lac Supérieur de Fully
Lac Supérieur de Fully
Lac Supérieur de Fully
Location: Canton of Valais , Switzerland
Tributaries: Cauldron around the Lac Supérieur de Fully
Drain: temporarily to the Fully power plant, otherwise a boiler without drainage
Lac Supérieur de Fully (Canton of Valais)
Lac Supérieur de Fully
Coordinates 575 154  /  110195 coordinates: 46 ° 8 '34 "  N , 7 ° 7' 2"  O ; CH1903:  575 154  /  110195
Data on the structure
Lock type: Gravity dam in front of a natural lake
Construction time: 1912-1914
Height of the barrier structure : 14 m
Height of the structure crown: 2133  m above sea level M.
Crown length: 113 m
Power plant output: 6 MW
Operator: Forces Motrices de Fully AG
Data on the reservoir
Altitude (at congestion destination ) 2128  m above sea level M.
Water surface 21 ha
Reservoir length 600 m
Reservoir width 300 m
Total storage space : 42 000 000  m³
Catchment area 3.5 km²

The Lac Supérieur de Fully is a reservoir near Fully in the canton of Valais at an altitude of 2128  m above sea level. M. It lies on the western flank of the Grand Chavalard . The power plant is fully powered with its water .

history

Construction of the dam began in the summer of 1912. Lac Supérieur is a natural lake that was dammed higher up with the wall. Despite the short mountain summer, the wall was completed within two years by October 1914. Test runs were carried out in 1914 and the plant went into operation in 1915. When it was commissioned and up until 1934, Fully was the system with the world's highest usable gradient. The headquarters in Fully is 495  m above sea level. M. and thus 1643 meters below the reservoir.

Due to the limited water supply, the plant is only put into operation at peak times.

Headquarters

Pelton wheel from 1914

One of the Pelton wheels from Ateliers Piccard, Pictet & Cie was presented at the 1914 national exhibition. Such an impeller weighed 7,100 kilograms and had 54 blades. For the assembly of the 54 blades, the wheel disk was heated to 130 degrees ( shrink-fitting ). The water speed at the nozzle was 180 meters per second and drove the turbine up to an output of 3000 hp. Originally 4 turbines of 2.2 MW each were installed in the headquarters, which were replaced in 1959 by a single group of 6 MW during an overall renovation.

The three-phase generators came from Maschinenfabrik Oerlikon , the pipes for the pressure line from Thyssen, and the gate valves from Von Roll ("Clus", ie from the Balsthal works ).

Technical specifications

The power plant center in Fully
  • Height difference used: 1643 m
  • Electrical output: originally 4 × 2.2 MW, today 6 MW
  • Efficiency: 81%
  • Average annual production: 12 GWh

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Web links

Commons : Lac Supérieur de Fully  - Collection of images, videos and audio files

Individual evidence

  1. ↑ The water turbines and their regulators in Switzerland. State Exhibition in Bern 1914 . Schweizerische Bauzeitung, Issue 24, Volume 63/64 (1914) continued
  2. ↑ The water turbines and their regulators in Switzerland. State Exhibition in Bern 1914 . Schweizerische Bauzeitung, issue 24, volume 63/64 (1914)