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Geothermal

An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

After 105 Years, Historic City Hall in West Des Moines, Iowa Goes Green
The restored Historic City Hall building in West Des Moines' Valley Junction neighborhood. | Photo credit: Vicky Saylor

The renovations include the installation of four geothermal heating wells, a rooftop covered with vegetation, solar panels and permeable pavers to allow stormwater through to the soil below.

Google.org-Backed Potter Drilling Blazing Geothermal Trail
Jared, left, and Bob Potter founded Potter Drilling in 2004. The company has received financial backing from Google.org to develop innovative geothermal technologies. | Photo courtesy of Potter Drilling |

Few start-ups are founded by retirement-aged scientists – and even fewer have Google.org backing. That's the unique position of Potter Drilling, a start-up founded in 2004 by a pioneering now-90-year-old and his son.

Calpine: America's largest geothermal energy producer
Calpine operates 15 plants at The Geysers in northwest California, which generate enough clean energy daily to power a city the size of San Francisco.| Photo Courtesy of Calpine

Since 1960, steam from the 45 square mile field spanning Lake and Sonoma counties has been extracted to drive turbines and generate baseload renewable electricity. Fifty years later, Houston-based Calpine Corporation operates 15 geothermal plants at The Geysers.