Höngg power plant
| Höngg power plant | ||
|---|---|---|
 |
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| location | ||
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| Coordinates | 679 106 / 250605 | |
| country | Switzerland | |
| place | Zurich | |
| Waters | Limmat | |
| power plant | ||
| owner | Electricity company of the city of Zurich | |
| Start of operation | 1893 | |
| technology | ||
| Bottleneck performance | 1.2 megawatts | |
| Standard work capacity | 10 million kWh / year | |
| Turbines | 1 Straflo turbine | |
| Others | ||
| Website | www.ewz.ch | |
The Höngg power plant (until 1973 “Am Giessen” power plant) is a run-of-river power plant on Werdinsel in the Höngg district of the city of Zurich .
It was built in 1893 by Robert Waser to supply electricity to his "Werdmühle" near the train station in Zurich-Altstetten as a private hydropower plant on the Limmat and has belonged to the Zurich City Electricity Company (EWZ) since 1973 .
history
A mill has been attested to at Höngger "Mülli-Giessen" on Werdinsel since 1365 . At that time the Wettingen monastery bought the mill in the Au from the knights of lakes . From 1752, a municipal powder mill was operated there. The mill, including the lands of the former powder mill, were sold in 1817 to the manufacturer Heinrich Strickler, who built a flax spinning mill next to the mill.
In 1893 Robert Waser acquired the area of the Höngg hemp and flax spinning mill as well as the water rights of the "Mülli-Giessen" from the municipality of Höngg. He wanted to move his mill, the upper Werdmühle, from the Sihl Canal to Altstetten. In order to be able to supply his company with energy, he had the “Am Giessen” power station built on the Limmat in 1893. During the earlier "Mülli-Giessen" the Waser Canal (factory canal) was dug, which turned the area of the former mill into an island (Werdinsel).
The power plant was equipped with a Jonval turbine from Rieter , in 1900 a second and in 1917 a Francis turbine from Escher Wyss AG with a generator from Maschinenfabrik Oerlikon . From 1898, Waser operated his newly built “Werdmühle” at the Altstetten site using electricity from his power station. The electric current now enabled a conveniently accessible mill location, independent of the course of the river. Limmat water is fed to the power plant through an artificially created water channel (upper water channel and lower water channel) below the Höngger weir.
From 1978 to 1987 the renovation of the existing system could be realized thanks to the combination with the renewal of the Höngg weir, which is necessary to maintain the groundwater level (area of the Hardhof groundwater pumping station). An old Jonval turbine was replaced with a prototype (low-pressure turbine development) of a high-performance Straflo turbine from Escher Wyss AG, a further development of the Kaplan bulb turbine, which had been reduced in size due to the lower head . The two turbine veterans were kept operational as museum pieces.
The Straflo turbine was later replaced by a tube turbine (geared tube turbine) of the usual design. The new turbine has a usable output of 1.2 MW and generates 8 GWh of electrical energy annually, around 2.3 times the amount of the previous three turbines combined.
Today's production and event power plant
The Höngg plant now produces electricity with the bulb turbine and was the first hydropower plant to be certified with the “naturemade star” label at the end of 2000. Among other things, it meets the highest environmental standards with its fish ladder, the high amount of residual water and the natural bank design.
In 2005 a power plant museum was integrated into the machine room. A multimedia show shows how electricity production and distribution works, the more than hundred-year-old Jonval and Francis turbines as well as the modern geared tube turbine are presented and the two historic turbines are put into operation for demonstration purposes.
Limmat weir Höngg
Headwater Canal
Machine room
Double regulation of the Jonval turbine from 1898, Rieter Winterthur
See also
literature
- Jakob Gremli: 2000 years Altstetten . Verlag Ortsgeschichtlicheommission Altstetten, Zurich 2003.
- René Schraner: Limmat power plant at Giessen Zurich-Höngg (EWZ). In: Limmat-Clübler 1/2017, pp. 1–7 ( PDF; 10.6 MB ).
- W. Wyssling: The development of the Swiss electricity works and their components . Swiss Electrotechnical Association , 1946.
Web links
Individual evidence
- ↑ City of Zurich: LEK Limmat Space City Zurich Technical Report
- ^ René Schraner: Limmat power plant at Giessen Zurich-Höngg (EWZ). In: Limmat-Clübler 1/2017, p. 3.
- ↑ Jakob Gremli: "From the Limmat - into the Limmat". In: 2000 years Altstetten .
- ↑ International symposium, conversion and expansion of hydropower plants, Zurich 1979: B. Barp: conversion of the power plant "Am Giessen" in Zurich-Höngg
- ↑ Höngger from May 28, 2009: Anniversary at the Höngg power plant
- ^ EWZ Höngg power plant: Guided tours
