Geothermal Energy

Geothermal energy from hot springs (Photo credit NREL).
Energy generated by the internal heat of the Earth can be harnessed to supply heat and other usable energy. Find information about geothermal technologies, ongoing research, policies and programs.


Describes three types of geothermal resources:  low-, medium- and high-temperature.  Discusses considerations for installing a greenhouse systems and available systems:  air, fluid, closed-loop, and open loop.

DOE. National Renewable Energy Laboratory.

Provides an overview of geothermal technologies including direct use, electricity production and heat pumps.

DOE. Office of Energy Efficiency and Renewable Energy.

Covers topics including geothermal basics, educational resources, history of geothermal energy in the United States, maps and photos, geothermal uses and applications, production systems and equipment, research, laws and standards, industry associations, geothermal energy publications, and current news and events.

Oregon Institute of Technology.

Provides technical information to consultants, developers, potential users, and the public about direct heat utilization of geothermal energy including research papers, maps of geothermal resources and projects, and case studies.  Includes a directory of consultants and equipment manufacturers.