Geothermal energy is heat derived within the sub-surface of the earth. Transmission - Power Lines Deliver Electricity. Rotational energy from the turning turbine shaft is used directly to spin magnets inside a large coil and create electrical current. The hot water or steam used is returned to the ground after it is used where it can be used again, which makes it a renewable energy source as well. Geothermal power does not require the burning of any fossil fuels. Geothermal energy is available 24 hours a day, 365 days a year. As a base-load source of power, geothermal energy is primed to take the place of coal in the traditional utility system. Geothermal power is homegrown, reducing our dependence on foreign oil. There are three main types of geothermal energy plants that generate power in slightly different ways. Geothermal energy can be generated as a base-load renewable energy resource, which means production occurs 24/7 despite changing weather patterns, thereby offering an exceptionally reliable and constant source of green energy. The turbine and generator are the primary pieces of equipment used to convert geothermal energy to electrical energy. Geothermal power is often considered the third or fourth most important source of renewable energy, behind solar, wind, and hydro. The future of geothermal energy can pretty much be summed up with a single word: More. Depending on its characteristics, geothermal energy can be used for heating and cooling purposes or be harnessed to generate clean electricity. Geothermal power plants have average availabilities of 90% or higher, compared to about 75% for coal plants. Geothermal Power Plants. Water and/or steam carry the geothermal energy to the Earth’s surface.
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