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  2. Betz's law - Wikipedia

    en.wikipedia.org/wiki/Betz's_law

    Betz's law. Schematic of fluid flow through a disk-shaped actuator. For a constant-density fluid, cross-sectional area varies inversely with speed. In aerodynamics, Betz's law indicates the maximum power that can be extracted from the wind, independent of the design of a wind turbine in open flow. It was published in 1919 by the German ...

  3. 100% renewable energy - Wikipedia

    en.wikipedia.org/wiki/100%_renewable_energy

    100% renewable energy made up of 99.98% hydroelectric and 0.02% wind power. Douglas Cty., Washington, United States: 41,945 100% hydro Georgetown, Texas, United States: 70,000 100% - 154MW solar and wind balanced with grid connection Greensburg, Kansas, United States: 1400 100% - wind balanced with grid connection

  4. Newman's energy machine - Wikipedia

    en.wikipedia.org/wiki/Newman's_energy_machine

    A diagram of the device. Newman's Energy Machine was a DC motor which the inventor, Joseph Newman, claimed to produce mechanical power exceeding the electrical power being supplied to it. In 1979, Newman attempted to patent the device, but it was rejected by the United States Patent Office as being a perpetual motion machine. [1]

  5. Steam turbine - Wikipedia

    en.wikipedia.org/wiki/Steam_turbine

    Steam turbine. The rotor of a modern steam turbine used in a power plant. A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884.

  6. Droop speed control - Wikipedia

    en.wikipedia.org/wiki/Droop_speed_control

    Droop speed control is a control mode used for AC electrical power generators, whereby the power output of a generator reduces as the line frequency increases. It is commonly used as the speed control mode of the governor of a prime mover driving a synchronous generator connected to an electrical grid. It works by controlling the rate of power ...

  7. 2024 Porsche Macan Electric First Drive Review: The ...

    www.autoblog.com/2024/04/23/porsche-macan...

    Both are built on a 100-kilowatt-hour lithium-ion battery pack located under the cabin, and both offer through-the-road all-wheel-drive from a pair of electric motors (one per axle). The 4 ...

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