Due to the low cost, high stability, and easy maintenance of hybrid towers, and the ability to break through the height limitations of steel towers, while maintaining stable power generation efficiency in areas with low wind speed, hybrid towers have gradually gained market recognition in recent years, with more and more businesses opting to enter the hybrid tower market. However, as an emerging "star," hybrid towers have experienced a number of alarming tower collapse accidents in recent years.
FL RENEWABLES, as the pioneer of concrete towers in China and the leader in setting standards for hybrid tower technology, will share next: How we have achieved quality control through design, materials, and production "three steps" to ensure that we have never had a single tower collapse accident to date.
(Hybrid Tower Collapse Accident)
Upon receiving the project plan from the client, the FL RENEWABLES design team will submit a preliminary design proposal that includes the segmentation elevation of the tower, cross-sectional dimensions of the tower, material parameters of the tower, and foundation rigidity of the tower according to the main engine power, hub height, rotor diameter, etc. After confirming with the client, the final design plan will be certified by the third-party testing institution TÜV Rheinland. The third-party certification company will conduct independent modeling, calculation, and verification based on the design drawings, thus ensuring the safety of the tower design.
(FL RENEWABLES Design Plan Overview)
(TÜV SüD Certification)
FL RENEWABLES's hybrid towers use UHPC ultra-high-performance concrete, which compared to ordinary concrete, has extremely high mechanical strength (compressive strength exceeds 150MPa, 4-6 times that of ordinary concrete) and structural toughness (flexural tensile strength exceeds 20MPa, 5 times that of ordinary concrete, ultimate axial tensile strength reaches 11~12MPa, more than 3 times that of ordinary concrete).
Segment Production
FL RENEWABLES's hybrid tower segments are produced through eight major assembly line processes including steel cage binding, concrete mixing at the mixing station, and concrete pouring, ensuring controllable segment quality;
Segment Transportation
FL RENEWABLES's hybrid tower segments are transported by individual sections, requiring no special transportation roads; the main machine can pass, and so can the tower. It can be adapted to local conditions, both assembling at the machine site and near-field assembly at the stacking yard.
(FL RENEWABLES Hybrid Tower Section Transportation and Assembly)
Segment Installation
FL RENEWABLES uses a bonded internal prestress solution, integrating the steel strands and the tower through grouting, isolating the steel strands from the external corrosive environment. Bonded prestress ensures controllable prestress loss, enhancing the safety of the tower, thereby making the tower virtually maintenance-free for life.
As the lead unit in formulating national standards such as the "Technical Specification for Prestressed Cast-in-place Concrete Towers for Wind Turbine Generators" and "Technical Specification for Prestressed Prefabricated Concrete Towers for Wind Turbine Generators," safety and quality have always been FL RENEWABLES's primary pursuit. FL RENEWABLES will continue to maintain high standards for product quality in material selection, design programs, and production and installation.
