Glasfaserverstärkte Holzrohre für Kleinwindkraftanlagen

Glass fiber reinforced wooden tubes for small-sized wind power plants

In this report, small-sized wind power plants with towers of wooden tubes and an outer reinforcement of glass fiber reinforced plastic are presented. The power for the generator is produced by vertical axis Darrieus rotors. The first example of application has a shaft of glued laminated solid wood segments. The height is 7.7 m. Experimentally determined data on the vibration behavior of this construction is briefly presented. As a second example of application, a wind power plant with a shaft consisting of a bundle of three moulded wooden tubes, which are connected by steel clamps, are described. The height of the bundle of tubes is 9 m. Both constructions could be assembled easily because of the low deadweight of the shaft and are reliably in service since. The outer coating with fiber reinforced plastic and the high vibration resistance are advantageous for the endurance of the facility. The good material damping of the wood reduces the noise emission and the fatigue of the machine parts due to heavy vibrations compared to similar constructions made of steel.