Amstetten electricity works
| Amstetten / Allersdorf power plant | |||
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| location | |||
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| Coordinates | 48 ° 6 '47 " N , 14 ° 51' 59" E | ||
| country | Austria | ||
| Waters | Ybbs | ||
| Data | |||
| Type | Run-of-river power plant | ||
| Primary energy | Hydropower | ||
| power | 3.49 MW | ||
| owner | Amstetten municipal utilities | ||
| Start of operations | 1901 | ||
| turbine | 3 Kaplan turbines | ||
| Website | Amstetten municipal utilities | ||
| was standing | October 23, 2012 | ||
The Amstetten electricity works is a run-of-river power plant that is used for small hydropower . It is located on the Ybbs River in the Austrian city of Amstetten . It went into operation in 1901 and in 2010 it was expanded to include residual water .
Water is diverted from the Ybbs via a canal (the “works canal”) and fed into the power station in the Allersdorf district, where two Kaplan turbines generate energy. Another residual water turbine is in operation at the renewed weir system in the Greinsfurth district. About a fifth of the city's area is supplied with energy via the electricity network owned by Stadtwerke Amstetten . The standard work capacity is 15 GWh .
history
On August 30, 1899, the city council of Amstetten passed the resolution to build a power station. The city had acquired the concession to use the hydropower of the Ybbs and intended the construction to illuminate the streets and squares and to deliver energy to private households. When planning the hydraulic engineering, special attention had to be paid to the flood situation. As early as 1899, the Amstettner Wochenblatt pointed out that the town's homeowners should report to the parish chancellery if they were to have electric lights switched on.
Construction could not begin before the power supply of the Mauer-Öhling infirmary (today's State Hospital Mostviertel) was clarified by the Lower Austrian Provincial Committee. On January 2, 1900, the construction and installation of two Francis turbine sets with an output of 250 kW each began . When the then mayor Anton Schmidl opened it on January 26th, 1901, the Amstetten power station was the largest hydroelectric power station in Lower Austria and the main square and the meeting room of the municipal council were already electrically illuminated.
The third and fourth Francis turbine sets were installed in 1901 and 1905, also with an output of 250 kW each.
Construction site upstream
Construction site of the run-out area
Construction site underwater with confluence with the Ybbs
Construction site of the run-out area
Power plant after completion (underflow)
Power plant after completion (upper reaches)
In 1911, a diesel unit with an output of 300 kW was installed. In 1931 two Francis turbine sets were expanded and the Kaplan turbine I with an output of 1160 kW was installed.
The second nationalization law passed by the National Council on March 26, 1947, allowed private and communal electrical works to be owned by NEWAG (today Energieversorgung Niederösterreich ), including the power plant in Amstetten. The provisional municipal council decided in a resolution of May 23, 1947, however, to reject this. Protests against the impending takeover followed for several years. These protests reached their peak in July 1952. The power plant was to be taken over by force in a nightly action, which could be prevented by the intervention of the workforce, alarmed by air raid sirens. However, the takeover could not be prevented and so the assignment took place in 1956. Stadtwerke Amstetten remained the operator of the power plant, NEWAG received the property.
In 1960, the two remaining Francis turbine sets were removed and the Kaplan turbine II with an output of 1780 kW was installed. The old Kaplan turbine I was removed in 1988 and replaced by a new Kaplan bulb turbine with an output of 1710 kW.
In 1991 the nationalized property was transferred back to Stadtwerke Amstetten, which enabled open legal issues between EVN and the Stadtwerke to be resolved.
Control room of the electricity company (approx. 1901)
Generators of the Francis turbine sets
Machine hall
In 2004 and 2005 the weir system in Greinsfurth was renovated and prepared for the installation of the residual water. A circulation system was also installed at the power plant to prevent ice pressure in winter. With it air is blown in to prevent the formation of a layer of ice and to break up thin layers of ice. In 2010 a residual hydropower plant with an output of 479 kW was built at the weir system in Greinsfurth with a fish pass .
Catchment area and water volume of the Ybbs
The catchment area of the Ybbs up to the Greinsfurth weir is about 833 km². The average amount of water is 26 m³ / s. (MQ) The largest floods to date have led to around 1000 m³ / s and statistically occur every 50–60 years. The minimum water flow in dry periods is less than 4 m³ / s.
Weir system
The target is 278.81 m above sea level ( meters above the Adriatic Sea ). The works canal has a length of 1300 m and an average depth of 3 m. The fish-bellied flap was 57 m wide and 1.54 m high and is used to regulate floods . The diving beam prevents larger floating parts (branches, trees, etc.) from getting into the works channel. The inlet sluices regulate the water level during floods or serve to shut off the works sewer in the direction of the power plant during inspections. The flood sluice (bottom outlet) is required in the case of large floods (from 150–200 m³ / s) to regulate the flood and to drain the storage area. The ballast sluice serves to flush the ballast channel in the inlet area. A fall protection in the direction of the residual water turbine serves as a shut-off device for the residual water turbine and closes with its own weight.
Allersdorf power plant
The power station in Allersdorf is a diversion power station . Two Kaplan turbine sets generate around 15 million kilowatt hours of electricity per year. This corresponds roughly to the average requirement of around 4,300 households in the Amstetten municipal utility network. With the construction of the diversion canal (the "works canal"), which begins at the weir in Greinsfurth, the water is led directly into the Allersdorf power plant with a very slight gradient. This abbreviation means that the water in the Allersdorf power plant has a greater head (12 m instead of 8 m), which leads to higher electricity generation. So far, when the tide was low, the 2.5 km long remaining water stretch was dry at least up to the mouth of the Url . Up to the mouth of the underwater canal there was an ecologically unfavorable residual water situation and the fish pulling from the Danube was interrupted by the weir system.
| Expansion water volume | 30 m 3 |
| Annual production | 15 GWh |
| Bottleneck performance | 3 MW |
| Height of fall | 12 m |
| Number of turbines | 2 (Kaplan bulb turbine) |
Residual hydropower plant
By releasing water into the original course of the Ybbs and no longer just into the works sewer, it is possible again to dope the river with water all year round in the area from the Greinsfurth weir to the return line from the Allersdorf power plant. So far, the endowment of the Ybbs has mostly been suspended in the summer months. The reason for this was that the water was diverted through the works canal from the Ybbs on a direct route to the Allersdorf power plant in order to generate electricity.
The water flows through the intake structure to the pressure pipe. The pressure pipeline runs up to the power house - there the transition to the steel inlet pipe and the Kaplan S bulb turbine takes place. Electricity is generated by a three-phase synchronous machine which, due to its low power, feeds directly into the local low-voltage network.
| Inlet pipe | Glass fiber reinforced plastic pipe (GRP pipe) |
| Pipe diameter | 2 m |
| Gross head | 8.19 m |
| Net head | 7.65 m |
| Depth of the building | 8.55 m |
| turbine | Kaplan S bulb turbine |
| rotational speed | 429 / min |
| Max. Flow | 7500 l / s |
| Turbine power | 510 kW |
| households supplied | approx. 360 |
| Annual production | 1.3 GWh |
Fish pass
The possibility of free passage is of great importance for natural fish stocks. The size-determining fish species for planning the fish migration aid in Greinsfurth is the huchen , which can reach a length of over a meter. The Greinsfurth fish migration aid is built as a slot pass, a so-called "vertical slot". With the fish pass, a fall height of over 8 m between the upper and lower water is overcome. The type of fish pass is one of the largest in Austria. The endowment of the fish pass fluctuates between 290 and 500 l / s depending on the season. These amounts of water are necessary, among other things, to achieve a corresponding attraction flow in the area of the entrance to the fish pass.
Data on fish migration aid:
- Slot width 40 cm
- 58 pools of 2.2 m × 3 m
- Difference in water level between the pools: 15 cm
- Electricity generation loss in the existing power plant: 200 MWh / year (this corresponds approximately to the energy requirements of 60 households)
- Flow from mid-March to mid-April: 500 l / s
- Flow from mid-April to late June: 400 l / s
- Flow remaining time: 290 l / s
literature
- Christian Mitterlehner: Final report on monitoring FAH Greinsfurth, Stadtwerke Amstetten. (PDF; 1.9 MB) Amstetten 2012.
photos
Construction site of the weir system and fish pass
Aerial view of the power station
See also
Web links
- Homepage of Stadtwerke Amstetten, stadtwerke.amstetten.at
Individual evidence
- ↑ a b Amstettner Wochenblatt. Number 53, year 1899.
- ↑ a b Amstettner Wochenblatt. Number 38, year 1899.
- ↑ Amstettner Wochenblatt. Number 5, year 1902.
- ↑ a b c d e City of Amstetten: Festschrift for the 100th anniversary of the Amstetten municipal utility. 2001.
- ↑ a b Stadtgemeinde Amstetten: Amstettner contributions 1978. S. 84, 98.
- ↑ a b News from the municipality of Amstetten. Number 5, year 29, June 2001.
- ↑ Amstettner Anzeiger. Number 21, year 59, July 31, 1951.
- ↑ a b Herbst Alois: Jubilee Festschrift to celebrate the 50th return of the town elevation. P. 29.
- ^ City news Amstetten. Number 2, year 1991.
- ↑ Mitterlehner Christian: Final report on monitoring FAH Greinsfurth, Stadtwerke Amstetten. P. 12.
