Heidseewerk
| Heidseewerk | ||
|---|---|---|
 |
||
| location | ||
|
||
| Coordinates | 759 621 / 172201 | |
| country |
 Switzerland
|
|
| place | Municipality of Vaz / Obervaz Fraction Obersolis , small settlement Solis |
|
| Waters | Heidbach | |
| Height upstream | 824 m above sea level M. | |
| power plant | ||
| owner | Electricity company of the city of Zurich (EWZ) | |
| Start of planning | circa 1916 | |
| construction time | 1917-1920 | |
| Start of operation | 1920 1953 and 1978 after renovation |
|
| technology | ||
| Bottleneck performance | 7.3 megawatts | |
| Average height of fall |
598 m | |
| Expansion flow | 1.45 m³ / s | |
| Standard work capacity | 23.84 million kWh / year | |
| Turbines | 1920: 2 × Pelton turbines with 6500 HP 1953: 1 × Pelton turbines with 7.3 MW |
|
| Generators | 1920: 2 × synchronous generator MFO to 6450 kVA 1953: 1 × synchronous generator MFO to 7 MW |
|
| Others | ||
| was standing | 2018 | |
The Heidseewerk is a high pressure - hydropower plant in the field of Swiss municipality of Vaz / Obervaz that the Heidsee used as storage month.
The headquarters of the power plant is located in Solis and releases the water into the inlet tunnel of the Albula plant , which leads to the headquarters in Sils in Domleschg , where the water is processed again. The power plant belongs to the Mittelbünden power plants owned by the Zurich City Electricity Plant (EWZ).
history
The city of Zurich put the Albula plant into operation in 1909, which took water from the Albula dammed near Nisellas ⊙ and turbinated it at the headquarters near Sils in Domleschg ⊙ . The energy was transmitted to Zurich via a 140 km high voltage line. In the winter months, the output of the system fell from 16.1 MW to 6 MW due to lack of water, which was not enough to supply the city with energy, especially since the energy demand in winter was greater than in summer. After the diesel power plant at Bucheggplatz was rejected in a referendum by the city of Zurich, the missing energy had to be procured elsewhere. The project for an additional hydropower plant presented in June 1916 was approved by the electorate in May 1917, so that construction could begin immediately. Although it was difficult to find enough workers to build the power station during and after the First World War , the plant was completed on December 31, 1919 and energy supplies began in January 1920. The construction costs amounted to 8.3 million SFr. , which in 2020 has a monetary value of CHF 386 million. corresponded.
investment
The energy storage of the power plant is the Heidsee. The existing dam was raised by 1.7 m and a second, smaller reservoir, the small Heidsee, was created south of it. From this basin the water flows in the left basin up to the water intake about 1.8 km away. From there, a 1.9 km long closed concrete channel and then a 2.3 km long tunnel lead to the moated castle . The pressure line is 1.8 km long and leads into the machine house in Solis, where it was originally processed by two Pelton turbines to produce 6500 hp. The turbines were supplied by Escher Wyss AG , the generators by Maschinenfabrik Oerlikon (MFO), the transformers by Brown, Boveri & Cie. (BBC). The energy was transmitted to Sils im Domleschg via a 6.3 km long 12 kV cable. The system could be remotely controlled from Sils right from the start. In 1953, the two turbines were replaced by a single one with an output of 7.3 MW.
System scheme
Overview of the entire system
Length profile
literature
- W. Kummer: The planned Heidsee plant, a supplement to the Albula power plant in the city of Zurich . In: Schweizerische Bauzeitung . tape 69 , issue 17, April 28, 1917, p. 192-193 , doi : 10.5169 / seals-33868 .
- W. Trüb, A. Senti: The electricity works of the city of Zurich (EWZ) . In: Zürcher Statistische Nachrichten . 14th year, 1st issue, 1937, Das Heidseewerk, p. 18–19 ( stadt-zuerich.ch [PDF]). . In: . 14th year, 1st issue, 1937, p. 11 (stadt-zuerich.ch [PDF]).
Web links
Individual evidence
- ↑ Federal Office for Energy SFOE (Ed.): Statistics of the hydropower plants in Switzerland . January 1, 2020 ( admin.ch [accessed on May 2, 2020] attachment number 301000).
- ↑ In Switzerland, all power plants that cannot store at least a quarter of winter production are run-of-river power plants. Source: Statistics of hydropower plants
- ↑ Federal Office for Energy (Ed.): Hydropower plants in Switzerland . January 1, 1973, p. 44-45 .
- ^ W. Kummer, p. 192
- ^ W. Trüb, A. Senti: Das Elektrizitätswerk der Stadt Zürich (EWZ) . In: Zürcher Statistische Nachrichten . 14th year, 1st issue, 1937, p. 11 ( stadt-zuerich.ch [PDF]).
- ^ W. Trüb, A. Senti, p. 19
- ↑ Inflation calculator. Federal Statistical Office, accessed on May 2, 2020 .
- ↑ a b W. Trüb, A. Senti
- ↑ Swiss Water Management Association (ed.): Guide through the Swiss water management . Volume 1: General and Technology. Zurich 1926, p. 300-301 .
- ↑ Federal Transport and Energy Department (Ed.): Statistics on hydropower plants in Switzerland . January 1, 1973, p. 44–45 ( admin.ch ).