Dam Pego do Altar

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Dam Pego do Altar
Towerdampegoaltar.jpg
location
Dam Pego do Altar (Portugal)
Dam Pego do Altar
Coordinates 38 ° 25 '5 "  N , 8 ° 23' 32"  W Coordinates: 38 ° 25 '5 "  N , 8 ° 23' 32"  W.
country PortugalPortugal Portugal
place Setúbal District
Waters Alcáçovas
Height upstream 52.26  m
power plant
owner Associação de Beneficiários do Vale do Sado
Start of planning 1934
Start of operation 1949
technology
Average
height of fall
6.22 to 43.48 m
Expansion flow 2 to 6 m³ / s
Standard work capacity 3 million kWh / year
Turbines 1 Francis turbine : 2 MW
Generators 1 × 2.45 MVA
Others

The dam Pego do Altar ( Portuguese Barragem do Pego do Altar ) is located in the Alentejo region of Portugal in the Setúbal district . It dams the Alcáçovas , a right (eastern) tributary of the Sado to a reservoir (Port. Albufeira da Barragem do Pego do Altar ). The town of Alcácer do Sal is about eight kilometers southwest of the dam.

The project to build the dam began in 1934. The construction was completed in 1949. In addition to irrigation, the dam is also used to generate electricity. It is owned by the Associação de Beneficiários do Vale do Sado .

Barrier structure

The barrier structure is a CFR dam with a height of 63 m above the foundation level (43.5 m above the river bed). The top of the dam is at a height of 56 m above sea level . The length of the dam crest is 192 m and its width 5 m. The volume of the structure is 371,000 m³.

The dam has both a bottom outlet and a flood relief . A maximum of 80 m³ / s can be discharged via the bottom outlet, and a maximum of 1,200 m³ / s via the flood discharge. The design flood is 2,120 m³ / s; the probability of this event occurring has been determined to be once in 10,000 years.

Reservoir

With a normal storage target of 52.26 m (maximum 52.26 m at high water), the reservoir extends over an area of ​​around 6.55 km² and holds 94 million m³ of water - of which 93.6 million m³ can be used. The minimum congestion destination is 15 m.

power plant

With an installed capacity of 2  MW , the Pego do Altar power plant is one of the smallest hydropower plants in Portugal. The average standard energy capacity is 3 (or 5.2) million kWh per year.

The Francis turbine was supplied by VA Tech Escher Wyss . It is located in a machine house at the foot of the dam. The power plant's turbine has a maximum output of 2 MW and the associated generator 2.45  MVA . The rated speed of the turbine is 500 rpm. The nominal voltage of the generator is 6  kV . In the switchgear , the generator voltage of 6 kV is increased to 30 kV by means of a power transformer.

The minimum height of fall is 6.22 m, the maximum 43.48 m. The minimum flow is 2 m³ / s, the maximum is 6 m³ / s.

See also

Web links

Commons : Dam Pego do Altar  - collection of images, videos and audio files

Remarks

  1. APA gives the heights exactly the other way around, but this is likely to be an error: Height above foundation - 43.5 m, Height above streambed - 63 m .

Individual evidence

  1. a b c d e PEGO DO ALTAR DAM. APA Barragens de Portugal, accessed December 11, 2014 .
  2. a b c d e f g h BARRAGEM DO PEGO DO ALTAR. (PDF 4.3 MB pp. 1–3) (No longer available online.) Sistema de Informação do Regadio, archived from the original on December 15, 2014 ; Retrieved December 11, 2014 (Portuguese).