Recently, China's first 140 meter hybrid tower carrying a 3MW wind turbine was manufactured by Jinhai Group and completed hoisting at the Donggouhe Wind Power Project in Shan County, Shandong Province.

The Donghegou wind power project in Danxian County is invested and constructed by Beijing Jieyuan New Energy Investment Co., Ltd., a subsidiary of Mingyang. The planned installed capacity of the project is 50MW, and 15 MySE 3.2-145 wind turbines adopt the Jinhai mixed tower scheme. In this plan, the lower concrete section of the tower is 108 meters high, and the upper steel tower section is 32 meters high.

Why do we need a tall tower?

With the shift of focus in the wind power market, the low wind speed areas in the central and southeastern regions of China have enormous development potential. Compared with the "Three Norths" with high-quality wind resources, wind resources in plain areas of China generally have the characteristics of low wind speed and high shear.

According to industry calculations, when the wind shear is greater than 0.15, using a high tower has a significant economic advantage. A wind shear of 0.3 can increase by approximately 200 equivalent utilization hours for every 20m increase. The higher the tower, the better wind resources can be obtained, which is also commonly known as "borrowing wind from the sky" in the industry.

For a long time, the lack of feasible tower schemes has greatly limited the development and utilization of wind energy resources in the central and eastern plains. The Donggouhe wind power project in Shan County, Shandong Province has successfully adopted a 140 meter tower scheme. The average annual utilization hours of the project have increased by 208 hours compared to the 120 meter tower scheme, and the economic benefits have significantly improved.

Full life cycle escort parity

Jinhai Co., Ltd. relies on its technological strength to successfully tackle the 140 meter fully prestressed mixed tower scheme, providing protection for the owner throughout the entire life cycle.

Compared with flexible steel towers, fully prestressed concrete towers have a higher overall structural stiffness and damping coefficient, ensuring that the amplitude of the unit is small during installation and the entire service life of the unit. This ensures stable windward angle of the impeller system, more stable power generation, and greatly reduces operation and maintenance costs.

Compared with traditional tower structures, Jinhai adopts the domestically pioneered thin-walled fully prestressed high-strength concrete tower technology, which reduces the overall construction cost by 30%. At the same time, the development of adaptive high-precision concrete steel formwork technology has improved the production efficiency of precast concrete components by three times. In addition, modular interchangeable tower design technology is also adopted to simplify the design process and reduce template design and manufacturing time for cylinder sections by more than 60%.

Fill the gap, leading domestically

With the advent of the era of comprehensive parity, increasing unit power will be the most effective way to dilute unit construction costs and reduce kilowatt hour electricity costs. The demand for large-scale units in the wind power market will continue to grow. In the "Three North" regions of China, the mainstream of large bases is already based on 3. X-4. XMW models, and the bidding for wind power projects in the central and southeastern regions is gradually focusing on ≥ 3MW.

Jinhai Co., Ltd. has over 10 years of experience in the wind power industry. Through cooperation with Tongji University, it has accumulated more than 70 independent intellectual property rights, and has applied for nearly 30 independent intellectual property rights related to 120m+concrete towers, mainly involving concrete tower design, formwork design, and construction installation.

The global performance of concrete tower operation has exceeded 3000 units. With the increase of wind turbine tower height, the advantage of concrete tower gradually becomes apparent, and its proportion is also increasing. It is reported that Jinhai Group has achieved performance in hundreds of concrete towers in China, with orders exceeding 300, covering a height of 120-140 meters. This successful lifting fills the gap in China and fully demonstrates Jinhai Group's leading position in the field of low wind speed wind power towers.

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