what does a large wind turbine that rises more than 40 stories high and rides on the wind look like?
2024-09-19
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fujian is one of the regions with the richest offshore wind energy resources in my country, with huge development potential. at present, fujian has formed a base for the entire offshore wind power industry chain, and has continuously set new records in the global offshore wind power equipment manufacturing. what is currently being manufactured in fujian is the world's largest mass-produced offshore wind turbine, with a single unit capacity of 18 megawatts.
the localization rate of the main components of the unit has reached 100%. the diameter of the wind rotor is about 260 meters, the blade is 126 meters long, and the blade sweeping area exceeds 53,000 square meters, which is equivalent to the size of about 7 and a half standard football fields. the unit can generate about 40 degrees of electricity per rotation. the average annual power generation of a single unit is as high as 72 million kilowatt-hours, which is enough to meet the annual electricity needs of about 40,000 households. at the same time, it can save more than 22,000 tons of standard coal and reduce carbon dioxide emissions by more than 59,000 tons each year.
fujian has now formed a complete industrial chain from wind turbines, motors to blades, steel structures, etc. the wind power products produced in fujian are not only widely used in my country's offshore wind power development, but have also been exported in large quantities to turkey and other countries participating in the construction of the "belt and road" initiative.
how is such a "powerful weapon" made? follow cctv reporters to visit my country's first full-industry chain offshore wind power industrial park.
cctv reporter wei ming: i am currently at the fujian three gorges offshore wind power international industrial park. the 18mw wind turbines are assembled in such large factories, with parts manufactured in various links of the industrial chain, and then transported to the sea for hoisting.
this blue device, about 10 meters long and weighing more than 200 tons, is the core of the 18-megawatt wind turbine, called the transmission chain, which includes the main shaft, gearbox, and generator components. to ensure safety, special care must be taken during hoisting.
an 18-megawatt wind turbine has a blade sweeping area that is nearly seven and a half football fields. how come this generator looks smaller than a private car?
this is the 18mw model that rolled off the production line in the park last year. the wind turbine's rotor is directly connected to the generator.
this is the model that rolled off the production line this year and is currently in production. it has been equipped with a high-performance gearbox designed independently in my country. with a generator that is only one-tenth the size of the previous one, the wind turbine can have the same high power. the rare earth materials required to manufacture the generator can be saved by about 90%. the overall weight of the wind turbine has also been reduced by more than 20%, making it easier to transport and hoist.
why do we need to design and manufacture fans with increasingly larger unit capacities?
at present, the total capacity of offshore wind turbines connected to the grid in fujian exceeds 3.5 million kilowatts. these wind turbines are built on piles that are tens of meters deep in the water, standing on the sea surface, and transmitting energy from fujian's power grid to thousands of households through submarine cables.
the significant increase in the power generation of a single unit has increased the utilization rate of each submarine pile foundation, each submarine cable, and each sea area, reducing the average power generation cost. according to calculations, the cost of offshore wind power per kilowatt-hour is less than 0.4 yuan.
the transmission chain has been basically hoisted to the position of the wind turbine nacelle. after further installation and commissioning, it will be installed and used in batches for the first time in the world in the offshore of lianjiang, fujian province, according to the construction of the offshore pile foundation and suitable weather. it is understood that the first batch operation plans to install nearly 40 18mw wind turbines, with an annual power generation of more than 3 billion kwh, which can reduce carbon dioxide emissions by more than 2.6 million tons.
this year, there may be more than 20 megawatts of new models coming off the production line, bringing more surprises!
source: cctv news client
