Geothermal -- The Energy Under Our Feet: Geothermal Resources ...

A national laboratory of the U.S. Departmenntt ooff EEnneerrggyy
Office of Energy Efficiency & Renewaabbllee EEnneerrggyy
National Renewable Energy Laboratory
Innovation for Our Energy Future
Technical ReportGeothermal—
NREL/TP-840-40665
The Energy Under Our Feet November 2006
Geothermal Resource Estimates for the
United States
Bruce D. Green and R. Gerald Nix,
National Renewable Energy Laboratory
NREL is operated by Midwest Research Institute • Battelle Contract No. DE-AC36-99-GO10337
Technical ReportGeothermal—
NREL/TP-840-40665
The Energy Under Our Feet November 2006
Geothermal Resource Estimates for the
United States
Bruce D. Green and R. Gerald Nix,
National Renewable Energy Laboratory
National Renewable Energy Laboratory
1617 Cole Boulevard, Golden, Colorado 80401-3393
303-275-3000 • www.nrel.gov
Operated for the U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy
by Midwest Research Institute • Battelle
Contract No. DE-AC36-99-GO10337Executive Summary
he Earth houses a vast energy supply or application: (1) Hydrothermal, (2) Deep
in the form of geothermal resources. Geothermal Systems, (3) Direct Use, T Domestic resources are equivalent (4) Geothermal Heat Pumps (GHPs),
to a 30,000-year energy supply at our and (5) Co-Produced and Geopressured.
current rate for the United States! In
Geothermal resources are categorized in fact, geothermal energy is used in all 50
several layers of accessibility and ...