Will the concrete tower make a comeback?
2020-12-30 09:40:25
en-admin
15
Key words:Tower; offshore wind power
On December 12, China promised at the Climate Ambition Summit that the total installed capacity of wind and solar power will reach 1.2 billion kilowatts or more by 2030, demonstrating my country's efforts and confidence in replacing traditional energy with new energy. In fact, all countries in the world have a growing demand for alternative energy sources, and hope to eventually replace traditional power generation methods. There is no doubt that the advantages of wind power in terms of power generation capacity and levelized cost per kilowatt-hour have made it a leader in the field of renewable energy power generation. status.
In order to meet the requirements of wind power installation growth and cost reduction, wind power tower manufacturers are undergoing unremitting tests. By building taller and stronger towers, they can minimize manufacturing and maintenance costs while maximizing power output. The advantage of high towers is that high wind speeds at relatively high altitudes can be obtained, and a more stable high wind speed can be obtained through a longer diameter impeller. Especially in low wind speed areas, the average wind speed in this type of area is relatively low, affected by factors such as surface roughness and vertical stability of the atmosphere, the wind shear index in the area is relatively large, and tall towers have become rigid demands under the trend of low wind speeds. . In the process of tower heightening, there are mainly three technical routes: all-steel flexible tower, concrete-steel mixed tower and all-concrete.
Everyone is familiar with concrete. It has been used for hundreds of years. So why hasn't the industry made large-scale use of concrete to make towers? In the past, the main obstacle to the use of concrete was the huge load and stress imposed on the material under extreme environmental conditions. The problem has not been solved, but after decades of development, modern processing and installation methods have overcome this obstacle, cost and even Lower. Related technologies have been overseas for nearly 20 years, and international mainstream wind turbine manufacturers Acciona, Enercon, and Gamesa all have large-scale applications. Several wind farms in Brazil, Chile, and Denmark have adopted concrete, and new projects in Spain and the UK have also adopted it.Everyone is familiar with concrete. It has been used for hundreds of years. So why hasn't the industry made large-scale use of concrete to make towers? In the past, the main obstacle to the use of concrete was the huge load and stress imposed on the material under extreme environmental conditions. The problem has not been solved, but after decades of development, modern processing and installation methods have overcome this obstacle, cost and even Lower. Related technologies have been overseas for nearly 20 years, and international mainstream fan manufacturers Acciona, Enercon, and Gamesa all have large-scale applications. Several wind farms in Brazil, Chile, and Denmark have adopted concrete, and new projects in Spain and the UK have also adopted it.
With the increasing pressure for subsidies and cost reduction of offshore wind power at home and abroad, the economic and reliable foundation (tower) form is bound to be welcomed by developers. However, steel towers, monopiles, and jacket foundations will still occupy the mainstream of offshore wind power.
The pictures and texts are from European offshore wind power
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