Raffelberg hydropower plant

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Raffelberg hydropower plant
Hydropower plant Mülheim Raffelberg.jpg
location
Raffelberg hydropower plant (North Rhine-Westphalia)
Raffelberg hydropower plant
Coordinates 51 ° 26 '31 "  N , 6 ° 49' 37"  E Coordinates: 51 ° 26 '31 "  N , 6 ° 49' 37"  E
country Germany / NRW
place Mülheim an der Ruhr , Speldorf
district
Waters Ruhr / Ruhr shipping canal
Kilometers of water km 7.67
Height upstream 31.85  m above sea level NHN
power plant
operator Businesses of the city of Mülheim an der Ruhr (own operation)
Start of planning 1922
construction time 1923-1925
Start of operation February 26, 1926
Listed since 5th November 1986
technology
Average
height of fall
6.85 m
Expansion flow 105 m³ / s
Standard work capacity 22 million kWh / year
Turbines 4 Francis turbines
Generators 4 synchronous generators from Siemens
Others
Fish way available
Associated weir Raffelberg weir
Associated lock Ruhr lock Raffelberg
was standing June 19, 2008

The Raffelberg hydropower plant is one of two run-of-river power plants in Mülheim an der Ruhr . In the Speldorf district on the Ruhrschifffahrtskanal , 7.67 kilometers before it flows into the Rhine , it is the last hydropower station in the Ruhr .

The power plant

That of a self-propelled Mülheim an der Ruhr (operations of Mülheim an der Ruhr) maintained Laufwasserkraftwerk is, with four Francis turbine with a vertical shaft coupled with synchronous generators of Siemens equipped. With a drop height of 6.85 meters, it has an average annual work capacity of 22 million  kilowatt hours . This generation of environmentally friendly electricity avoids an amount of around 20,000 tons of  CO 2 compared to conventional production  . The turbines can discharge a maximum of 105,000 liters of water per second.

The return pumping station

The second of the Ruhr's eight return pumping stations was located at the Raffelberg hydropower station .

Two pumps with a total motor output of 1120  kilowatts and a delivery rate of 10,000 liters per second were able to pump the water 6.85 meters back into the upstream water if necessary .

The return pumping station was abandoned by the Ruhrverband in 2010.

history

Due to the reparations to France after the lost First World War and the resulting growing shortage of coal as an energy supplier, the city decided to build a hydropower plant near the new Ruhr lock Raffelberg . The plant was to be positioned on the Ruhrschifffahrtskanal , which was not yet completed. The canal was supposed to connect the port of Mülheim , which was also under construction, with the Rhine-Herne Canal , the Duisburg-Ruhrort ports and the Rhine.

Planning for the Raffelberg hydropower plant began in 1922. The construction work spanned the period from 1923 to 1926. The design of the building was done by the architects Arthur Pfeifer and Hans Großmann , as with many buildings in the city of Mülheim. Siemens-Schuckertwerke from Berlin took care of the technical equipment .

On February 26, 1926, the power plant finally went online. The four three-phase generators coupled directly to Francis turbines delivered a voltage of 5,000  volts . The electricity was fed into the Speldorfer local network and, transformed to 25 kilovolts, into the RWE overland network. At the same time, the Friedrich Wilhelms hut was also supplied.

At the beginning of the 1960s, the three-phase generators were converted to 10,000 volts, and in the 1970s the waterworks was equipped with electronic controllers according to plans by the Voith company and thus largely automated. In 1986 the historically attractive Raffelberg hydropower plant was placed under a preservation order; the originally preserved Francis turbines from the 1920s are an attraction. In July 2001 a 130 meter long fish ladder was inaugurated at the waterworks.

Today, the power plant is the thematic point of the route of industrial culture (theme route 12 - past and present of the Ruhr and theme route 18 - chemistry, glass and energy ).

gallery

Web links

Commons : Wasserkraftwerk Raffelberg  - Collection of pictures, videos and audio files