Alfenz power plant
| Alfenz power plant | ||
|---|---|---|
 |
||
| location | ||
|
||
| Coordinates | 47 ° 8 '5 " N , 9 ° 50' 32" E | |
| country |
Austria Vorarlberg
|
|
| place | Lorüns | |
| Waters | Alfenz | |
| power plant | ||
| owner | Zech Kies GmbH. | |
| operator | Alfenzwerke Elektrizitätserzeugung GmbH. | |
| Start of planning | 1923 | |
| construction time | 2 | |
| Start of operation | January 6, 1926 | |
| technology | ||
| Bottleneck performance | 3 megawatts | |
| Average height of fall |
60 m | |
| Expansion flow | Max. 6.8 m³ / s | |
| Turbines | 3 Francis turbines | |
| Others | ||
| Website | alfenzwerke.at | |
| Radin side memory | ||
|---|---|---|
|
||
| Geographical location | Klostertal , Vorarlberg | |
| Drain | Alfenz | |
| Places on the shore | Radin | |
| Data | ||
| Coordinates | 47 ° 8 ′ 35 " N , 9 ° 52 ′ 58" E | |
|
||
| surface | 27,200 m² | |
| length | 270 m | |
| width | 110 m | |
| volume | 151,800 m³ | |
| scope | 750 m | |
| Maximum depth | 8 m | |
The Alfenz power plant is the only power plant operated by Alfenzwerke Elektrizitätserzeugung GmbH . The hydropower plant is located in the municipality of Lorüns at the entrance to the Montafon valley . To generate energy, the power plant uses the downhill section from the Radin side storage facility ( 641 m above sea level ) to the power house in Lorüns ( 580 m above sea level ). The power plant comprises three machine sets, each with a Francis turbine and a generator.
history
The power plant was built between 1924 and 1925 to supply the Vorarlberg cement works of Lorüns AG in Lorüns and Ludesch with electrical energy. Regular operations began on January 6, 1926. The power plant was sold to Zech Kies GmbH (Alfenzwerke Elektrizitätserzeugung GmbH) in 1999.
Parts of the approximately 2.8 km long pressure tunnel, the surge tank and the pressure pipeline were renewed at the beginning of 1990 when it was necessary to relocate them due to the progressive rock extraction in the Lorüns quarry .
Name derivation
The name "Alfenz" is mentioned as " Alfenze " or " Alvenze " as early as 1355 and is said to be traced back to Albantia - Weißbach.
Line network
To the power plant Alfenz has a small low-voltage - distribution network through which supplied some private collector (see also: distribution system operators , network level ).
Page memory
Due to the high amount of bed load from the Alfenz, it was not possible to build a dam in the 1920s . On the occasion of the renewal of the power plant and in view of the new water law permit and for ecological and economic reasons, the solution was chosen to build a side storage tank (2006). The drainage structure of the side storage and the storage room were planned in such a way that material management of the storage is possible with heavy machinery.
The side storage facility of the Alfenz power plant near Radin was put into trial operation in December 2012 and holds around 150,000 m³. This ensured that a sufficient amount of residual water would flow in the Alfenz in the future (400 to 700 l / s) and it also increased the efficiency of the power plant for the power plant operator. The Radin side storage facility can now also partially absorb the surge water from the outlet of the Spullersee storage power plant of the Austrian Federal Railways, which is about 13 km above, and can use it for electricity generation.
Technical specifications
Alfenz power plant
Old plant
- Commissioning: January 6, 1926
- Pressure pipeline manufacturer: Waagner-Biro AG, Vienna and Kurz, Graz
- Turbine manufacturer: JM Voith, St. Pölten
- Number of turbines: 2, later 3
- Turbine type: Francis spiral turbine with horizontal shaft
- Turbine output: 882 kW each
- Maximum flow per turbine: 2 m 3 / s
- Maximum speed turbine: 750 / min.
- Manufacturer generator: 1 each from Brown Boveri Werke Vienna and AEG-Union Vienna.
- Generator output (initial expansion): 1200 kVA
- Generator voltage: 3800 volts
- Generator frequency: 50 Hz
- Maximum speed generator: 750 / min.
- Maximum height of the old weir: 2.8 m (broken off)
- Expiry of the first water law permit: 1996
New facility
- Moated castle: area 180 m²
- Pressure pipeline: steel pipeline (partly in the tunnel, partly buried)
- Maximum possible expansion water volume: 6.8 m 3 / s
- Bottleneck capacity: around 3 MW
In order to make better use of the capacity of the power plant, it is to be operated mainly in the high tariff phases in the future.
Radin side memory
The water catchment at Radin was designed with a double-chamber desanding system according to the Dufour system (2 × 32 m), leads largely horizontally (gradient only 1.2 ‰) over an approximately 2.5 km long tunnel through the Davennagruppe and after Lorüns to the power station . In front of the power station building, a water lock has been built inside the mountain to absorb any pressure surges. A 115 m long pressure pipe leads from the moated castle to the power station building (drop height approx. 60 m).
- Start of planning: 2006
- Commissioning: 2012
- Volume at destination: 151,800 m³
- Usable volume: 130,000 m³
- Water level surface: 27,200 m²
- Maximum dam height: 8.50 m
- Ridge slope on both sides: 1: 2
- Lake length: 270 m
- Width of the lake: 110 m
- Dam circumference: 750 m
- Waterproofing: rock
- Energy content: 17,550 kWh
- Emptying time: 5 hours 20 minutes
The inlet contactor opens, contrary to the conventional construction, in this system from top to bottom. This gives a variable weir threshold height and is intended to guarantee the seasonal differences in guaranteeing the residual water volume of 400 to 700 l / s in the Alfenz river bed.
literature
- Profitability boost for the Alfenz power plant from Roland Gruber.
- A. Sonderegger in “Schweizerische Bauzeitung”, 89/90, issue 19, May 7, 1927, p. 247 ff, online .
- A. Sonderegger in "Schweizerische Bauzeitung", 89/90, issue 20, May 14, 1927, p. 263 ff, online .
Individual evidence
- ^ Vogt, Vorarlberger Flurnamenbuch , I / 1, p. 32z and I / 2, p. 207.
- ↑ See: A. Sonderegger in “Schweizerische Bauzeitung”, 89/90, issue 19, May 7, 1927, p. 247 ff.
- ↑ Roland Gurber in “Economic Boost for the Alfenz Power Plant”, article from February 24, 2014 in online .
- ↑ The storage tank is filled in the aftermath and emptied during the day as required. See Roland Gruber in "Economic boost for the Alfenz power plant", article from February 24, 2014 in online .