Sihwa-ho tidal power station
| Sihwa-ho tidal power station | |||
|---|---|---|---|
 |
|||
| location | |||
|
|||
| Coordinates | 37 ° 18 '49 " N , 126 ° 36' 44" E | ||
| country |
 South Korea
|
||
| Waters | Yellow Sea / Asan Bay | ||
| Data | |||
| Type | Tidal power plant | ||
| Primary energy | Hydropower | ||
| power | 254 MW (electrical) installed | ||
| operator | Korea Water Resources Corporation ( K-water or KOWACO for short ) |
||
| Project start | 2003 | ||
| Start of operations | August 3, 2011 | ||
| turbine | 10 Kaplan bulb turbines à 25.4 MW | ||
| Energy fed in per year | approx. 550 GWh | ||
The tidal power plant Sihwa-ho is a tidal power plant in dam construction method on Sihwa Lake ( kor. 시화호 , Sihwa-ho ), a man-made lagoon on the coast of South Korea .
With its installed capacity of 254 MW, Sihwa-ho has been the most powerful tidal power plant in the world since it was commissioned in August 2011, ahead of the French tidal power plant Rance (240 MW).
location
The power plant is located on the west coast of South Korea in Gyeonggi-do province , west of the city of Ansan , around 40 km southwest of the capital Seoul .
It uses the power of the Yellow Sea , located between the Korean Peninsula and the People's Republic of China , in which strong tides form due to the large area at an average depth of only 44 meters . In Asan Bay , from which Lake Sihwa was separated, the tidal range is up to 8 m.
history
The dam, built between 1987 and 1994 by the Korea Water Resources Corporation , was not originally constructed for the purpose of generating energy, but for land reclamation ( koog ) and the creation of a freshwater reservoir for irrigation in agriculture. After the dam was completed and the bay was thus separated from the open sea, the water quality in the newly created lagoon deteriorated rapidly due to urban and industrial wastewater discharged, so that the water was unusable for the intended purposes. A study carried out by the Korea Ocean Research and Development Institute (KORDI) found that water quality should improve again if there were more water exchanges with the open sea.
In 1997 it was decided to create an opening in the dam through which the seawater could press into the basin at high tide. It made sense to use the tidal current to generate energy and to integrate a power plant.
Construction work on the power plant began in 2003. A section of the sea next to the existing dam was cut off and drained by a temporary dam wall made of huge concrete cylinders. The barrage and the power station were built next to each other in the resulting tub. It was built by the South Korean plant construction company Daewoo Construction in cooperation with the Austrian VA Tech Hydro .
Parallel to the construction of the power plant, two islands (the island of people and the island of nature ) were raised on both sides of the system on the dam , which are to be used for tourism, leisure and education.
Since the generation of electricity is subordinate to the ecological function, the power plant was only designed to operate in one direction: only the water from the incoming tide drives the turbines; at low tide, the water is fed back into the sea in an energetically ineffective manner via a barrage with eight gates . Since these represent less resistance than the turbines, a stronger water circulation is achieved; with each tidal cycle, about a quarter of the lake volume is exchanged.
The completion and commissioning of the power plant was initially planned for the end of 2009 or the beginning of 2010, but was delayed several times in the course of the construction work. The power plant finally went into commercial operation on August 3, 2011.
Technical structure and data
Reservoir / dam
- Length of the dam: 12.7 km
- Volume of the reservoir: 324 million m³
- Surface of the reservoir: 56.5 km²
- Weir: 8 gates, size 15.3 m × 12 m (open at low tide)
- Sea water throughput: approx. 160 million m³ / d (corresponds to about 50% of the volume of the lake)
- Tidal range about 7.5 m
power plant
- Annual work around 550 GWh (corresponds to the consumption of a city with around ½ million inhabitants)
- Average height of fall 5.82 m
- 10 × turbine
- 3-bladed Kaplan bulb turbines
- Output 25.4 MW per turbine
- Capacity 482 m³ / s per turbine
- Impeller diameter 7.5 m
- Speed 64.3 min −1
- Generators:
- Voltage 10.2 kV
- Output 26.76 MVA
- Mains frequency 60 Hz
See also
Web links
- Description of the power plant at the operator K-water (English)
Individual evidence
- ↑ a b Sihwa Lake Tidal Power Plant on english.kwater.or.kr (English)
- ^ A b c South Korea's First Tidal-Power Plant Begins Full Operations. Bloomberg LP , August 29, 2011, accessed September 19, 2011 .
- ↑ a b c d e hydro NEWS issue 8. (PDF; 3.0 MB) VA Tech Hydro, June 2005, pp. 14–15 , accessed on November 15, 2012 .
- ↑ a b tidal force energy , on world.kbs.co.kr
- ↑ a b Sea power for the socket . Süddeutsche Zeitung online edition, January 8, 2008
- ↑ a b c The Sihwa Tidal Power Plant , on daum.net (graphics in English)
- ↑ a b NewsWorld Korea: Hunt for African Projects // Daewoo E&C also contracted to build Ganghwa Tidal Power Plant, the biggest in the world ( Memento from July 19, 2011 in the Internet Archive ), September 2009 (English)
- ↑ Lee Kwang-soo: Ocean Energy Development in Korea ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF) on iea-oceans.org, November 2006
