1/4/2024 0 Comments Tidal power stationsThe 552.7 GWh of electricity generated from Sihwa tidal power plant is equivalent to 862,000 barrels of oil, or 315,000 tons of CO2 – the amount produced by 100,000 cars produce annually. Tidal power offers some strong advantages in comparison to other renewable sources, such as its periodicity and long-term predictability of tidal patterns. With limited energy resources and a need to develop pollution-free, clean energy, South Korea is looking to tidal power as a potential alternative to fossil fuels. LocationSihwa embankment, Ansan City, Gyeonggi-do, Korea Power capacity254 MW (10 x 25.4MW turbines) Gates8 sluice gates (15.3m×12m, Culvert type) Annual generation552.7 GWh Project construction period2003–11 (commercial operation began in 2011) Project costUSD 560 million Effect of the construction With ten water turbine generators each with an installed capacity of 25.4 MW, the power plant produces 552.7 GWh of electricity annually – enough to support the domestic needs of a city with a population of 500,000. When the tide is high, water then flows from the West Sea to Sihwa lake via the ten turbines, generating electricity. The sluice gates are closed as the tide comes in which isolates the reservoir at its lowest level. The Sihwa tidal power plant generates one-way power twice a day at high tide. In the early 21st century, tidal energy generation gained increasing attention as a strategy to counter rising international oil prices and reduce greenhouse gas emissions. At the time, potential developments were not deemed profitable and were postponed. The feasibility of tidal energy generation in South Korea was first investigated in the 1970s. The 552.7 GWh of electricity generated from Sihwa tidal power plant is equivalent to 862,000 barrels of oil, or 315,000 tons of CO2 – the amount produced by 100,000 cars produce annually." The tidal power plant facility Approval was received in 2002 and construction began in 2004. K-water, the Korean governmental water authority, commissioned the first feasibility study for the construction of a tidal power plant at the site which would improve seawater circulation by about 200 per cent. However, seawater circulation via the sluice gates alone is limited. In response, the government transitioned Sihwa’s operating strategy from a freshwater to a seawater lake by periodically opening up the seawall’s sluice gates to flush the basin by circulating seawater in an effort to improve the water quality. This was due to a combination of factors, including low natural freshwater inflows and the increase of wastewater from the industrial complexes.ĭelays in the construction of local wastewater treatment facilities further exacerbated the situation, and by 1997 the Sihwa Lake was so contaminated that the water could no longer be used. Yet once the seawall was closed and the natural tidal currents were cut off, water quality deteriorated. It was created to provide reclaimed land for the nearby metropolitan area, flood mitigation, and secure irrigation water by converting the costal reservoir to fresh water. According to the latest figures of 2016, total power output of Jiangxia pilot tidal power plant is 1.57x109 kWh since it combined to grid of East China on Jan 26, 1986.Sihwa Lake is a 43.8 km² artificial lake constructed as a land reclamation project by the South Korean government in 1994, using a 12.7 km long seawall at Gyeonggi Bay. Since June 2009, automation and safety of the plant have been great improved after technological upgrading for the 3rd and 4th generator sets. For years the engineering staff of Jiangxia plant devoted to industrialization research works of tidal generating and had made remarkable achievements in reliability of the generator sets, sediments reducing in reservoir, erosion protecting, floating method, operating automation and optimal scheduling. In 2014, in the support of the 3rd round of SFPMRE, the 1st generator upgraded from 500kw to 700kw, which bring the total installed capacity reached to 4.1MW. In June 2007, the 6th set generator was successfully developed and connected to the grid and the total installed capacity reached 3.9 MW. The whole project of Jiangxia Tidal Power Plant was completed in 1985, which installed one set generator of 500 kW, one set of 600 kW and three sets of 700 kW with the total capacity of 3.2 MW. The first set of turbines generated electricity in 1980. It has started the construction from 1974.
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