| 摘要 |
A non-permanently erect wind turbine installation comprises a tower 3 which can be lengthened and shortened, a propeller having blades 1 which can be lengthened, shortened, or folded, a control system 35 which controls the installation, and control sensors 27, 28, 29 linked to the control system. The wind turbine is raised to operate when dark, and is stowed and concealed during the daytime, or during periods of stormy weather, the operation preferably being automatic. The mast 3 is preferably telescopic and pivoted at the base, and may be tilted into position using a pneumatic or hydraulic ram 7. The retracted wind turbine and tower is preferably concealed within a tunnel having a cover 43 (see figure 3). The wind turbine may be part of a multi-tower installation, and may store unused energy in a battery, or by pumping water to penstock reservoir of a hydro power plant for later use. |
