Annapolis tidal power station
| Annapolis tidal power station | |||
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| Coordinates | 44 ° 45 '11 " N , 65 ° 30' 42" W | ||
| country | Canada | ||
| Waters | Fundy Bay / Annapolis River | ||
| Data | |||
| Type | Tidal power plant | ||
| Primary energy | Hydropower | ||
| power | 20 MW (electric) | ||
| operator | Nova Scotia Power | ||
| Project start | 1980 (start of construction) | ||
| Start of operations | 1984 | ||
| turbine | 1 × Straflo bulb turbine , max. 400 m³ / s, acting on one side (at low tide) | ||
The Annapolis Royal Generating Station is a tidal power plant in dam construction method in Canada .
location
 
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The power plant is located in the confluence of the Annapolis River in Fundy Bay ( English Bay of Fundy or Fundy Bay , French Baie de Fundy ) near the city of Annapolis Royal on the Nova Scotia peninsula on the east coast of Canada .
Fundy Bay is characterized by a particularly large tidal range , which is created by the resonance amplification of the tidal wave (for details see: Fundy Bay ) . In the Minas Basin at the inner end of the bay the tidal range is 15 to 21 m, at the Annapolis power plant it is still up to 7 m.
Further tidal power plants are being planned in Fundy Bay. In November 2009 a pilot plant for the tidal power plant type ocean current power plant was built in the strait to the Minas basin .
history
The construction of the tidal power station from 1980 onwards was primarily a research project, as there was very little experience with this technology around the world at that time. Annapolis was one of only three megawatt-class tidal power plants in the world at the time of construction; the second largest after the Rance tidal power plant in France.
The energetic use of the unusually strong tides in Fundy Bay had previously been discussed for a long time, but was not implemented due to economic and ecological concerns.
The opportunity for the realization came when the end of the 1970s, an old and dilapidated steel bridge for highway Nova Scotia Trunk 1 on the Annapolis River between Annapolis Royal and the opposite site Granville Ferry be upgraded had. The construction of the dam for the power plant made costly renovations or a new bridge unnecessary. Furthermore, there was already a barrage at this point that could be used to regulate a bypass flow around the power plant. The construction of the dam, which simultaneously acts as a road dam for Trunk 1 and a dam for the power station, was commissioned by the local electricity supplier Nova Scotia Power , which at the time was still a public company and therefore also took on tasks of general infrastructure promotion. Construction began in 1980 and four years later, in 1984, the power plant went online.
The results of the experiment were mixed. While the generation of electricity works largely without any problems to this day, some negative ecological effects were found: The weakening of the tidal current in the estuary led to increased erosion in the river bed. In addition, when the tide came in, whales got lost several times through the sluice into the artificially created storage basin above the power plant.
Technical specifications
dam
- Length: 225 m
turbine
- 1 piece, type Straflo turbine ( Kaplan turbine )
- acting on one side (only with ebb current)
- Impeller diameter: 7.6 m
- 18 guide vanes + 4 impeller vanes
- Drop height:
- Normal operating range: 1.4 to 6.8 m
- Nominal: 5.5 m; maximum 7.1 m
- Power:
- at nominal head (5.5 m): 17.8 MW
- at maximum height of fall (7.1 m): 19.9 MW
- Water volume at nominal head: 378 m³ / s
- Speed at nominal head / maximum: 50/98 1 / min
- Annual work: approx. 50 GWh
literature
- Christoph Mertha, Frank N. Nagel: Annapolis Royal tidal power plant , in Frank Norbert Nagel Ed .: Canada. From Acadia to the Yukon. Books on Demand , Norderstedt 2013, pp. 35 - 38 (available in Google books )
Web links
Individual evidence
- ↑ a b c Annapolis Tidal Station . Accessed May 31, 2020 . (English)
- ↑ a b Nova Scotia Power ... A Tidal Power Pioneer Adds Wind To Its Renewable Resources In: Electrical Line magazine March / April 2002, online at www.electricalline.com (PDF, English; 109 kB)
- ↑ In-Stream Tidal Turbine - Deployment and Project History at www.nspower.ca. Accessed May 31, 2020 . (English)
- ↑ The Kaplan turbine on young.evn.at ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ Jürgen Giesecke, Emil Mosonyi, Stephan Heimerl: Hydropower Plants: Planning, Construction and Operation , Springer-Verlag, Berlin, Heidelberg, 2005
