Rabenauer Grund hydropower plant
| Rabenauer Grund hydropower plant | ||
|---|---|---|
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| location | ||
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| Coordinates | 50 ° 58 '6 " N , 13 ° 37' 25" E | |
| country | Saxony , Germany | |
| place | Freital - Hainsberg | |
| Waters | Rote Weißeritz | |
| power plant | ||
| owner | ENSO Energie Sachsen Ost | |
| operator | ENSO Energie Sachsen Ost | |
| construction time | 1911 | |
| Start of operation | 1911 | |
| technology | ||
| Average height of fall |
39.22 m | |
| Expansion flow | 3.3 m³ / s | |
| Turbines | 2 Francis turbines (490 kW), 1 cross- flow turbine | |
| Generators | 3 three-phase generators (2 × 500 kVA, 1 × 150 kVA) | |
| Others | ||
| was standing | 2015 | |
The Rabenauer Grund hydropower plant (also Unterwerk I or Rudeltwerk ) is a run-of-river power plant on the Roten Weißeritz in Rabenauer Grund near Hainsberg , a district of the Saxon major district town of Freital in the Saxon Switzerland-Eastern Ore Mountains district . It is right next to the first bridge of the Weißeritztalbahn from Hainsberg to Kipsdorf .
Investments
The 460 meter long headrace tunnel begins at a twelve meter wide weir near the Rabenauer Mühle ( ⊙ ). It has a width of two meters and a height of 2.20 meters. The moated castle is located on the steep slope of the Rote Weißeritz , from which the water is fed to the turbines via a 176 meter long pressure pipe with a diameter of 1.10 meters. The drop height is 39.22 meters with a maximum flow of 3.3 m³ per second. Excess water is led back into the Rote Weißeritz via a natural stone cascade at the moated castle .
Three machine sets are installed in the machine house, two of which are still operated today using Francis turbines , which Voith manufactured in Heidenheim in 1911 . These turbines have an output of 490 kW at a speed of 600 revolutions per minute. The impeller has a diameter of 540 millimeters, the blades are 120 millimeters wide. A two-phase synchronous generator built in 1911 by the Chemnitzer Elektricitäts-AG Pöge was connected until 2012 . The two -phase current was converted into the usual three-phase three-phase current using a Scott transformer in an outbuilding . When the hydropower plant was modernized in 2012, the old generators were replaced by three-phase generators from the Anhalt electric motor plant in Dessau with an output of 500 kVA . In addition, the third machine set with a cross- flow turbine and a 150 kVA generator was installed.
After leaving the machine house, the water is led back into the Rote Weißeritz via a 60 meter long underground ditch. The ditch ends right next to the railway bridge and also crosses under the hiking trail through the Rabenauer Grund.
history
The hydropower plant was built in 1911 under the planning of the “Community Association of Electricity Works for Plauen's Ground in Deuben”, which later became Kraftwerke Freital AG. It is the first hydropower plant ("Unterwerk I") of the community association, which was originally formed to build the power plant for the Plauenschen Grund ("main plant"), and also the first power plant of its kind along the Rote and Wilder Weißeritz rivers .
In 1917 the hydropower plant was named "Rudeltwerk" in recognition of the services of the Mayor of Deuben and member of the community association Ernst Robert Rudelt .
After the nationalization of Kraftwerke Freital AG in the GDR, the management of the hydropower plant was incumbent on the master hydropower plant in the Freital plant of the energy district and the East Energy Combine . After German reunification , Energieversorgung Sachsen Ost AG (ESAG), which emerged from the combine in 1990, took over the power plant and in 1991 did not start the 1.5 million mark renovation of the cascades, which was already planned in GDR times, but not due to a lack of financial resources could be carried out.
In April 2012, the operator ENSO Energie Sachsen Ost , which emerged from ESAG, began further modernizing the power plant. The aim was to increase the efficiency and performance of the hydropower plant, which was to be achieved, among other things, by installing a third turbine. It enables additional electricity to be generated at high flow rates and higher efficiency at low flow rates.
The Rabenauer Grund hydropower plant is under special protection as a technical monument and is noted in the Freital cultural monument list.
literature
- Peter Boenke: Gas and Power Supply in Freital 1828–2003. An outline of the story . Ed .: Freitaler Strom + Gas GmbH. Freital 2003.
Web links
- Technical data of the machines and pictures of the power plant , including pictures of the generators used up to 2012
Individual evidence
- ↑ a b Katja Weinhold: Rabenauer Grund hydropower plant opens to visitors on Saturday. In: ENSO blog. ENSO Energie Sachsen Ost AG, April 20, 2015, accessed on September 28, 2015 .
- ↑ a b c d Stream from its most beautiful sources. (PDF; 6.4 MB) The ENSO hydropower plants. ENSO Energie Sachsen Ost AG, September 22, 2010, pp. 12-13 , accessed on March 23, 2018 .
- ↑ Boenke 2003, p. 83
- ↑ Boenke 2003, pp. 59-60
- ↑ Boenke 2003, p. 61
- ↑ Boenke 2003, p. 83
- ↑ Boenke 2003, p. 83
- ↑ ENSO is modernizing the Rabenauer Grund hydropower plant. Press release from ENSO Energie Sachsen Ost AG. In: landratsamt-pirna.de. April 5, 2012, archived from the original on September 29, 2015 ; accessed on September 28, 2015 .