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  2. Solar water heating - Wikipedia

    en.wikipedia.org/wiki/Solar_water_heating

    An advertisement for a Solar Water Heater dating to 1902 Frank Shuman's sunengine on the March 1916 cover of Hugo Gernsback's The Electrical Experimenter. Records of solar collectors in the United States date to before 1900, [5] involving a black-painted tank mounted on a roof. In 1896 Clarence Kemp of Baltimore enclosed a tank in a wooden box ...

  3. Ivanpah Solar Power Facility - Wikipedia

    en.wikipedia.org/wiki/Ivanpah_Solar_Power_Facility

    The local irradiance near the area is about 7.4 kWh/m 2 /day [49] [50] (annual average) for a total solar energy flow in the visible spectrum of 2.717 MWh/m 2 yearly. One heliostat mirror is a 75.6 square feet (7.02 m 2 ) reflecting surface, [ 51 ] giving a total of 151.2 square feet (14.05 m 2 ) per heliostat.

  4. Pumped-storage hydroelectricity - Wikipedia

    en.wikipedia.org/wiki/Pumped-storage...

    Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing. A PSH system stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation.

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