ZOOM ON THE WORLD ENERGY


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ZOOM ON THE WORLD ENERGY

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GEOTHERMAL HEAT PUMP

A geothermal heat pump is an electric heat pump that draws heat from or discharges heat to the ground or ground water, instead of air. This works because the ground temperature which is 10-12 feet below the earths's surface stays relatively constant at 55 degrees Fahrenheit. A turbine is driven either from hot water or by natural steam that derives its energy from the Earth's heat.

An "open loop" geothermal heat pump uses heat found in rocks or fluids at various depths beneath the surface of the earth, and receives/discharges fluids from the earth. The fluids are extracted by drilling and/or pumping. A "closed loop" geothermal heat pump pipes a fluid in a closed piping system underground, which receives heat from or discharges heat to the Earth.

	OBSERVATORY FOR ENERGY