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  2. Downhole heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Downhole_heat_exchanger

    It is used to capture or dissipate heat to or from the ground. DHT's are used for geothermal heating, sometimes with the help of a geothermal heat pump. Downhole heat exchangers, like other use of geothermal energy, have the potential to significantly contribute to the reduction of CO 2 emissions. [2] In northern Europe, DHE are already widely ...

  3. Closed-loop geothermal - Wikipedia

    en.wikipedia.org/wiki/Closed-loop_geothermal

    Closed-loop geothermal systems (also known as “advanced geothermal systems” or “AGS”) are a type of engineered geothermal energy system containing subsurface working fluid that is heated in a hot rock reservoir without direct contact with rock pores and fractures.: [1] [2] [3] Instead, the subsurface working fluid stays inside a closed loop of deeply buried pipes that conduct Earth’s ...

  4. Geothermal energy - Wikipedia

    en.wikipedia.org/wiki/Geothermal_energy

    Geothermal heating is the use of geothermal energy to heat buildings and water for human use. Humans have done this since the Paleolithic era. Approximately seventy countries made direct use of a total of 270 PJ of geothermal heating in 2004.

  5. Ground source heat pump - Wikipedia

    en.wikipedia.org/wiki/Ground_source_heat_pump

    A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

  6. Richard B. Fisher Center for the Performing Arts - Wikipedia

    en.wikipedia.org/wiki/Richard_B._Fisher_Center...

    fishercenter.bard.edu The Richard B. Fisher Center for the Performing Arts at Bard College is a performance hall located in the Hudson Valley hamlet of Annandale-on-Hudson, New York . The center provides audiences with performances and programs in orchestral, chamber, and jazz music, and in theater, dance, and opera.

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  8. Hot spring - Wikipedia

    en.wikipedia.org/wiki/Hot_spring

    A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circulation through faults to hot rock deep in the Earth's crust .

  9. Unocal Corporation - Wikipedia

    en.wikipedia.org/wiki/Unocal_Corporation

    The Union Oil Company of California was founded on October 17, 1890, in Santa Paula, California, by Lyman Stewart, Thomas Bard, and Wallace Hardison. It was a merger of three Southern California oil companies: the Sespe Oil Company and the Torrey Canyon Oil Company (both owned by Bard) and the Hardison and Stewart Oil Company. [5]

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