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At a good wind site, the energy payback day could be in three years or less; in a poor location, energy payback may be never. That is, a windmill could spin until it falls apart andnever generate as much energyas was invested in building it.

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  • How do windmills generate electricity?

  • When the wind blows, the wind energy pushes on the blades and turns them around the rotor. In turn, the rotor causes the main shaft inside the turbine to spin, which generates electricity. The basics of how windmills and wind turbines generate power centers on the wind pushing on the blades of the wind turbine.

  • Do windmills put energy in bad places?

  • So Mr Hughes was saying only that placing windmills in bad places may mean they don鈥檛 generate enough energy to 鈥減ay back鈥?the energy it cost to produce them, not that all turbines will fail to do so. Mr Homer-Dixon adds, 鈥渋t would be pointless to put wind turbines in poor locations鈥?

  • How much energy can you generate from wind?

  • The amount of energy one can generate from wind depends on the wind speed, size of the turbine, and the length of the turbine blade. To obtain wind energy, the kinetic energy of wind is used to create mechanical power. This mechanical power is transformed into electrical energy using wind energy conversion systems.

  • Why are wind turbine farms so important?

  • Since wind turbines use wind energy, they also literally create a valuable resource such as electricity from completely free wind. Entire wind turbine farms can generate enough green energy to support whole towns or industrial applications.

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