Angostura dam (Costa Rica)

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Angostura dam
Represa Angostura, Turrialba, Cartago.jpg
location
Angostura dam (Costa Rica)
Angostura dam
Coordinates 9 ° 52 '13 "  N , 83 ° 38' 28"  W Coordinates: 9 ° 52 '13 "  N , 83 ° 38' 28"  W.
country Costa RicaCosta Rica Costa Rica
place Turrialba , Cartago Province
Waters Reventazón
Height upstream 577  m
power plant
owner Instituto Costarricense de Electricidad (ICE)
operator ICE
construction time 1994 to 2000
Start of operation 2000
technology
Bottleneck performance 177 megawatts
Expansion flow 160 m³ / s
Standard work capacity 674.3 million kWh / year
Turbines 3 Francis turbines
Others

The Angostura dam ( Spanish Represa Angostura ) is a dam with hydroelectric power plant in the province of Cartago , Costa Rica . It dams the Reventazón to a small reservoir. The small town of Turrialba is about 4 km northwest of the dam. The Cachí dam is approx. 18 km upstream.

The construction of the dam and the associated power plant began in 1994. The power plant went into operation in December 2000. It is owned by the Instituto Costarricense de Electricidad (ICE) and is also operated by ICE.

Barrier structure

The barrier structure consists of a stone embankment dam with a height of 36 (or 38) m. The length of the dam crest is 235 m. The volume of the structure is given as 600,000 m³. The dam has both a bottom outlet and a flood relief .

From the dam, the water is first led through a tunnel (length 6.2 km; diameter 7 m) with a gradient of 1% and then through a pressure pipeline to the machine hall of the power plant.

Reservoir

With a maximum storage target of 577 m above sea level , the reservoir extends over an area of ​​around 2.56 km² and holds 17 million m³ of water; 11 million m³ of this can be used to generate electricity. The congestion destination can be lowered to 570 m for electricity generation. The length of the reservoir is 2 km.

Since the reservoir would silt up due to sedimentation within 20 years, it has to be completely drained on average twice a year. To do this, the bottom outlet is opened, which empties the reservoir. This takes about 23 hours. When it was emptied in 2012, the sediments that were washed out by the bottom outlet were estimated at 517,300 tons.

power plant

The Angostura power plant ( Planta Hidroeléctrica Angostura in Spanish ) has an installed capacity of 177 (or 180, 210 or 220) MW . The annual generation in 2016 was 674.3 million  kWh . The power plant serves to cover the daily peak load . The flow rate is 160 m³ / s.

The three Francis turbines and other power plant equipment were supplied by Voest-Alpine MCE . The order value was ATS 140 million  .

Others

The total cost of the project with 270 (or 350) million USD given.

See also

Web links

Commons : Angostura Dam (Costa Rica)  - Collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b c d Angostura: respiro por dos años. La Nación , November 26, 2000, accessed January 23, 2019 (Spanish).
  2. ↑ a b c d e f g Costa Rica - Angostura. International Hydropower Association (IHA), accessed January 23, 2019 .
  3. ↑ a b c d Training in Costa Rica. www.waterpowermagazine.com, February 13, 2001, accessed January 23, 2019 .
  4. ↑ a b c 5 hidroeléctricas que más aportan en la producción energética en Costa Rica. revistaconstruir.com, August 9, 2017, accessed January 23, 2019 (Spanish).
  5. ^ Angostura Hydroelectric Power Station Costa Rica. Global Energy Observatory, accessed January 26, 2019 .
  6. ↑ a b VA technology: VOEST-ALPINE MCE successful in Costa Rica. Voest-Alpine MCE , accessed on January 26, 2019 .
  7. ↑ Planta Reventazón produjo menos energía de la prevista en primer año. La Nación, August 19, 2017, accessed January 23, 2019 (Spanish).