Santa Luzia dam
| Santa Luzia dam | ||
|---|---|---|
_(cropped).jpg) |
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| location | ||
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| Coordinates | 40 ° 5 '23 " N , 7 ° 51' 29" W | |
| country |
 Portugal
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| place | Cabril Parish , Coimbra District | |
| Waters | Monsters | |
| Height upstream | 656 m | |
| power plant | ||
| owner | HIDROCENEL, Energia do Centro, SA | |
| operator | Energias de Portugal (EDP) | |
| Start of planning | 1930 | |
| Start of operation | 1943 | |
| technology | ||
| Bottleneck performance | 25.888 megawatts | |
| Average height of fall |
326 m | |
| Expansion flow | 10 m³ / s | |
| Standard work capacity | 54 million kWh / year | |
| Turbines | Pelton turbines : 4 | |
| Others | ||
The Santa Luzia dam ( Portuguese Barragem de Santa Luzia ) is located in the central region of Portugal in the Coimbra district . It dams the river Unhais , a right (northern) tributary of the Zêzere to a reservoir (port. Albufeira da Barragem de Santa Luzia ). About a kilometer west of the dam is the municipality of Cabril and a few kilometers downstream is the small town of Pampilhosa da Serra .
The project to build the dam began in 1930. The construction was completed in 1942. The dam is used to generate electricity. It is owned by HIDROCENEL, Energia do Centro, SA (HIDROCENEL).
Barrier structure
The barrier structure is a combination of arch dam and pillar dam made of concrete (multiple arch dam ) with a height of 76 m above the foundation base. The top of the wall is at a height of 655.6 m above sea level . The length of the top of the wall is 115 (or 178) m. The volume of the structure is 80,000 m³. The dam was designed by André Coyne .
The dam wall has both a bottom outlet and a flood relief with two gates.
Reservoir
With the normal storage target of 656 m, the associated reservoir extends over an area of around 2.46 km² and holds 53.7 million m³ of water - of which 51 (or 50.5) million m³ can be used. The minimum congestion destination at which the machines can still be operated is 615 m. With the usable 50.5 million m³ of water, 34.2 million kWh can be generated.
power plant
The Santa Luzia power plant is one of the smaller hydropower plants in Portugal with an installed capacity of 32 (or 23.2, 24.4 or 25.888) MW . The average annual generation is 55 (or 54 or 57) million kWh .
The power plant is located on the right bank of the Zêzere River . A 3.44 m long penstock connects the reservoir with the power plant.
The four Pelton turbines with horizontal shafts each produce a maximum of 6.472 (or 6.1) MW, while the generators produce 8 MVA . The nominal speed of the turbines is 500 revolutions per minute. The generators have a nominal voltage of 6 kV . In the switchgear , the generator voltage of 6 kV is increased to 60 kV by means of power transformers.
The maximum height of fall is 326 m. The maximum flow rate is 2.5 m³ / s per turbine.
The power plant went into operation in 1943 and was renovated in 1998. It is owned by HIDROCENEL but operated by EDP .
Others
In the dam there is a problem of swelling of concrete ( English Concrete swelling ) due to alkali-aggregate reaction (eg. As alkali-silica reaction ) on. This leads to tension and cracking in the concrete.
See also
Web links
- Barragem de Santa Luzia 2013. Youtube, accessed November 18, 2014 (Portuguese).
- Barragem de Santa Luzia - descarga de topo. Youtube, accessed on November 18, 2014 (Portuguese).
Individual evidence
- ↑ a b c d e SANTA LUZIA DAM. APA Barragens de Portugal, accessed November 18, 2014 .
- ↑ a b c Santa Luzia dam. Structurae International Database for Structures and Civil Engineers, accessed November 18, 2014 .
- ↑ a b c d e f g h Santa Luzia Informação Técnica. EDP , accessed November 18, 2014 (Portuguese).
- ↑ a b Hidroelectricidade em Portugal memória e desafio. (PDF 226 KB p. 29 (27)) Rede Eléctrica Nacional, SA (REN), accessed on November 18, 2014 (Portuguese).
- ↑ a b c d e DECLARAÇÃO AMBIENTAL 2012. (PDF 16.1 MB p. 49 (47)) EDP , accessed on November 18, 2014 (Portuguese).
- ↑ RELIABILITY OF ARCH DAMS SUBJECT TO CONCRETE SWELLING. (PDF 1.3 MB pp. 10–11) www.xitizap.com, accessed on November 18, 2014 (English).
- ^ Dan D. Curtis: A REVIEW AND ANALYSIS OF AAR-EFFECTS IN ARCH DAMS. (PDF 532 KB p. 4) www.xitizap.com, accessed on November 18, 2014 (English).