Embedding a wind tower about the size of the Washington Monument on the ocean floor is faster and cheaper.
South Korea has reduced the time required to build and install offshore turbines from three months to just a few days, thanks to a large flatboat for transporting structures and a “bucket suction” method for fixation. It. Innovation could save an estimated $ 3 million from the process.
The state-owned power company Korea Electric Power Corporation (Kepco) announced on Wednesday that it was the first vessel to carry a fully constructed wind farm. A crane of a 1,500-ton ship known as the Multipurpose Mobile Base (MMB) lifted a 140-meter-high wind tower built in water near the West Port of Gunsan. MMB will move to the offshore site for installation on Friday.
At the event, Kepco CEO Jung Seung-il said, “By using MMB technology, we will work on our carbon-neutral goals for 2050 and make a significant contribution to wind power, a central element of the country’s transition. You should be able to do it. ” ..
According to BloombergNEF, innovations to reduce costs and installation time will help spur the global expansion of offshore wind, which is already predicted to result in an 11x increase in capacity by 2035. I promise. Annual equipment will rise to a record 11 gigawatts this year, reaching 32.5 GW by the end of the decade, as countries phase out fossil fuels and add renewable energy to curb carbon emissions. Expected.
BNEF said in a report last month that China, which accounts for nearly three-quarters of this year’s installations, and early Asian markets such as Japan, Taiwan and Vietnam support its growth prospects.
The sea offers one of the best prospects for green energy in South Korea, where the climate and terrain are unsuitable for large solar and onshore wind farms and the traditional hydropower resources are almost fully utilized. I will. The country is currently trying to add 12 GW of offshore wind by 2030, compared to less than 0.2 GW.
South Korea already has the world’s largest tidal power plant on Lake Sifa and is adding the world’s largest offshore wind farm near Sinan. Kepco, the country’s worst pollutant, aims to build three wind farms by 2030, aiming to move away from fossil fuels.
Kepco is reducing the 90 days it can take in certain situations to build and install offshore wind turbines. The company can assemble the plant onshore in 7 days and MMB will ship it to an offshore location. Transporting the entire factory significantly reduces the time and cost of several business trips to deliver parts.
According to a Kepco statement, this new process will reduce the cost of installing a 5-megawatt turbine by 43%, or 3.7 billion won ($ 3.3 million).
According to Ryu Moo Sung, a senior researcher at the Kepco Research Institute, the company aims to increase the size of the MMB to accommodate turbines of up to 14 MW deployed in Europe. He said Germany’s RWEAG and Spain’s Ocean Winds are interested in Kepco’s vessels.
When the MMB arrives at the offshore site, it can take up to 12 hours to secure the tower to the seabed using “suction bucket” technology. In this method, water is pumped from the bucket and pressure is applied to push the bucket into the floor. The soft seabed on the southwest coast of South Korea makes it ideal for this method.
The new process is an improvement over traditional methods that can cause environmental problems when cement is injected into the seabed to build the foundation, Kepco said. In addition, offshore construction is vulnerable to delays due to bad weather, which can further increase costs.
According to the 2019 BNEF report, the time it takes to install offshore turbines is steadily declining, doubling the pace of 10 years ago. In the United States, partners, including the Department of Energy and the University of Delaware, have also worked to accelerate the construction of offshore wind farms using suction bucket technology.
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