Introduction to Geothermal Energy

What Is Geothermal Energy?

Geothermal Energy is defined as “energy from the internal heat of the earth”

is absorbed by the earth The remainder is absorbed by the atmosphere
or reflected back into space

Translated: Geo-Thermal means “Earth-Heat”

“High Temperature” Geothermal Energy

Energy Source for Hot springs and geysers Temperatures exceed 300°F Converted to produce useable heat and electricity

  

Energy Efficiency – Building Blocks

Step 1 – Reduce Energy Load

Site Orientation and Building Arrangement Efficient and Effective Building Envelope

Step 2 – Improve Efficiency of Systems and Equipment

HVAC Systems – Geothermal Systems Efficient A/C units, Boilers, Motors, Light Fixtures Lighting Systems – Daylighting Computers and Office Equipment

Step 3 – Effective Building Operations

Proper Control – Energy Management Systems Commissioning Operations and Maintenance – Training and Support Leverage Utility Company Rate Schedules

Step 4 – Alternative Energy Sources

Renewable Energy Options – Solar, Wind, Biomass

"Low Temperature” Geothermal Energy

Heat Energy contained near the surface of the Earth Shallow Earth temperatures fluctuate with seasonal outside air temperature Earth temperature becomes more stable with increasing depth Nearly constant Earth temperatures at depths below 16 feet Earth mean temperature approaches annual average outside air temperature Deep Earth temperatures start to increase at depths below 400 feet – at about 1 °F per 100 feet