How Geothermal Works

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Geothermal systems use the Earth's energy storage capability to heat and cool buildings, and to provide hot water. The earth is a huge energy storage device that absorbs 47% of the sun's energy-more than 500 times more energy than mankind needs every year-in the form of clean, renewable energy. Geothermal takes this heat during the heating season at an efficiency approaching or exceeding 400%, and returns it during the cooling season. Geothermal heating and cooling systems use conventional vapor compression heat pumps to extract the low-grade solar energy from the earth. In summer, the process reverses and the earth becomes the heat sink.

Loop Diagram During Heating Mode

Geothermal heating loop

Loop Diagram During Cooling Mode

Geothermal cooling loop

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