Rudolf Fettweis factory

EnBW Kraftwerke AG
Rudolf-Fettweis-Werk

		Beaver tracking
		Dog broaching
		Schwarzenbachtalsperre	668.5 m
		Erbersbronn collecting basin	533 m
		Cherry tree wash basin	447 m
		Raumünzachwerk

		Forbach power house	313 m

		Forbach compensation basin	301.6 m
		Low pressure unit
		Drain to the Murg

Pressure pipes and machine house in Forbach

EnBW overview board at the Schwarzenbachtalsperre

The Rudolf-Fettweis-Werk is a pumped storage and run-of-river power plant in Forbach in the Murgtal , northern Black Forest . It was built by the state of Baden from 1914 and is now owned by EnBW .

construction

The complex includes several plants connected by tunnels and pipelines:

The main structure of the Schwarzenbachwerk is the Schwarzenbach reservoir . Water is supplied to this via the Raumünzach tunnel , which is more than 5 km long , and is collected in the neighboring, high-lying side valleys of the Raumünzach in the Biberach catchment and the Hundsbach catchment . The water from the dam arrives through the 1642 m long Schwarzenbach tunnel to Wasserschloss II , from where it falls in an 881 m long pressure pipe running above ground to the turbine house in the valley floor of the Murg in Forbach. The maximum output of the two Pelton turbines is 46 MW . If there is a surplus of electricity, water can be pumped from the Kirschbaumwasen collecting basin into the storage basin located higher up, where it is available to cover the electricity demand at peak loads.

In addition to the Kirschbaumwasen collecting basin, the Murgwerk consists of the 5613 m long Murgstollen and two 437 m and 450 m long above-ground pressure pipes from the Wasserschloss I to the turbine house in Forbach. 5 Francis turbines have a maximum total output of 22 MW.

The Francis spiral turbine of the Raumünzachwerks is from the collection basin Erbersbronn about 1.2 km long slope tunnels supplied and a 125 m long penstock with water, which then via the Raumünzachfassung the Murgstollen is supplied. The maximum output is 0.55 MW.

In the low-pressure plant , two Kaplan bulb turbines and a maximum output of 2.4 MW use the storage height of the Forbach equalization basin to generate energy. This basin, located below the turbine house of the two main works, also serves to regulate the flow of water in the Murg and as a lower basin of the pumped storage plant.

A special feature of the Schwarzenbachwerk is worth mentioning: While the water is discharged into the Forbach compensation basin in generator mode, water is drawn from the Kirschbaumwasen collecting basin in pumping mode. As a result, the pumps only have to cope with a height difference of almost 220 m instead of the full height difference between the power house and the dam of approx. 355 m.

The grid connection is made via the Forbach switchgear on the 110 kV high voltage level in the power grid of the distribution network operator Netze BW GmbH.

history

Raumünzach waterfall of the Schwarzenbach before it was diverted to the power plant from 1926

Inaugural medal from Rudolf Kowarzik 1918

Already in 1903 the hydraulic engineer Theodor Rehbock had commissioned the paper mill E. Holtzmann & Cie. Plans drawn up for the use of hydropower in the upper Murg Valley. When the Grand Duchy of Baden began to build up a state electricity supply, the Head Office for Water and Road Construction in Karlsruhe took over these plans.

The core of the planning were the Murg dam near Kirschbaumwasen , the Murg power plant in Forbach and a reservoir in the Schwarzenbachtal.

Murgtalsperre and Murg power station were built between 1914 and 1918. The Raumünzachwerk was built between 1921 and 1923 to supply power to the construction site of the Schwarzenbachtalsperre and was therefore initially known as the Baukraftwerk . The Schwarzenbachtal is about 350 meters higher than the Murgtal and was ideal for the construction of a reservoir, which was built from 1922 to 1926. The Murg power plant in Forbach was greatly expanded during the construction of the Schwarzenbachtalsperre. The original plans also included a second dam in the Raumünzachtal, but this was not implemented for economic reasons. Instead, the Hundsbach and the Biberach were taken as source brooks of the Raumünzach and fed to the Schwarzenbachtalsperre via the Raumünzach tunnel, which was designed as a gravity pipeline.

The work was initially under the direction of the hydropower and electricity department of the Baden Higher Directorate for Water and Road Construction, which was newly created for this power plant construction, and was continued from 1921 by the Badische Landes-Elektrizitäts -orgungs AG . The power plant complex was later named after Rudolf Fettweis , who was the board member at the time and who was responsible for building the Schwarzenbach plant.

In the summer of 2010, EnBW presented a project study on expanding the Rudolf Fettweis plant by installing additional reservoirs and power plants. The preferred location for the new upper basin to be built is the summit area of the Seekopf . A cavern storage facility is planned as a new lower basin near Forbach. In January 2018, the permit application for the construction of a new lower level was submitted to the Karlsruhe Regional Council, which includes the underground cavern storage facility. The new storage facility increases the ability to work as a pumped storage power plant - regardless of whether a new upper stage is actually being implemented.

literature

M. Weizel: The Baden Murgwerk near Forbach . In: Deutsche Bauzeitung , volume 46, 1912, issue 60, p. 523, 525–526 ( PDF ) and issue 62, pp. 541–543 ( PDF )

Schuler: The first expansion of the Murgwerk . In: Zentralblatt der Bauverwaltung , 36th year 1916, issue 69, pp. 457–462 ( digital copy )

Otto Hauger: The Badische Murgwerk . In: Deutsche Bauzeitung , Volume 52, 1918, Issue 92, pp. 429–432 ( PDF ), Issue 94, pp. 441–444 ( PDF ), Issue 100, pp. 469–474 ( PDF ) and Issue 104, Pp. 489–491 ( PDF )

Government building officer Feldmann, board member of the state building authority for the Murgwerk: The civil engineering of the Schwarzenbachwerk. (Murgwerk II. Expansion) . In: Zeitschrift für Bauwesen (engineering component ) , 77th year 1927, issue 7–9, pp. 59–66 ( PDF , panel 1 ) and issue 10–12, pp. 96–107 ( PDF ), as well as the supplementary systems for Schwarzenbachwerk . In: Zeitschrift für Bauwesen , Volume 78, 1928, Issue 4, pp. 88–95 ( PDF )

Daniel Keller: "White coal" in the Murgtal. The Rudolf Fettweis plant in Forbach - one of the first pumped storage power plants in Europe . In: Preservation of Monuments in Baden-Württemberg , 41st year 2012, issue 3, pp. 152–157 ( PDF )

Web links

Commons : Rudolf-Fettweis-Werk - Collection of Images

Rudolf Fettweis factory forbach. (PDF; 533 KB) EnBW brochure. September 2011, archived from the original on January 8, 2016 ; accessed on March 25, 2016 .
EnBW on the Forbach pumped storage power plant expansion project
BUND Middle Upper Rhine on the expansion project

Individual evidence

↑ List of power plants (nationwide; all network and transformer levels). ( xlsx , 321 kiB) Federal Network Agency , July 16, 2014, archived from the original on August 13, 2014 ; accessed on October 1, 2014 .
↑ Press release: EnBW Kraftwerke AG presents considerations for the expansion of pumped storage power in Forbach. EnBW , July 9, 2010, archived from the original on October 1, 2014 ; accessed on October 1, 2014 .
^ Project diary - Forbach pumped storage power plant - EnBW AG. Retrieved July 25, 2018 .

48.668692 8.35313Coordinates: 48 ° 40 ′ 7.3 " N , 8 ° 21 ′ 11.3" E

[1] List of power plants (nationwide; all network and transformer levels). ( xlsx , 321 kiB) Federal Network Agency , July 16, 2014, archived from the original on August 13, 2014 ; accessed on October 1, 2014 .

[2] Press release: EnBW Kraftwerke AG presents considerations for the expansion of pumped storage power in Forbach. EnBW , July 9, 2010, archived from the original on October 1, 2014 ; accessed on October 1, 2014 .

[3] Project diary - Forbach pumped storage power plant - EnBW AG. Retrieved July 25, 2018 .