Geothermal energy

Hydrothermal Resources

Posted on December 24, 2011 at 12:15 AM


Hydrothermal Resources

There is more than one type of geothermal energy, but only one

kind is widely used to make electricity. It is called hydrothermal

energy. Hydrothermal resources have two common ingredients:

water (hydro) and heat (thermal). Depending on the temperature of

the hydrothermal resource, the heat energy can either be used for

making electricity or for heating.

ƒ Low Temperature Resources: Heating

Hydrothermal resources at low temperatures (50 to 300 degrees

Fahrenheit) are located everywhere in the United States, just a few

feet below the ground. This low temperature geothermal energy is

used for heating homes and buildings, growing crops, and drying

lumber, fruits, and vegetables.

In the U.S., geothermal heat pumps are used to heat and cool homes

and public buildings. In fact, approximately 750,000 geothermal

exchange systems are installed in the U.S. Almost 90 percent of the

homes and businesses in Iceland use geothermal energy for space


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