Types of Geothermal

Geoexchange, EES or Low grade geothermal uses low temperature of the earth at shallow depth which is about 8 to 12 °C in most regions of Canada. Amazingly this low temperature can be boosted to a desired temperature of 30 to 50 °C, using heat pump technology. Heat pumps are devices which can grab low-grade heat from a large resource (such as ground or ground water) and compress it into a smaller supply at a higher temperature.  Low grade geothermal is also known as: Geoexchange, Geothermal Heat Pump (GHP), Ground source heat pump (GSHP), Ground coupled heat pump (GCHP) and Earth Energy System (EES).
Direct Use Geothermal is those geothermal resources that the heat of the resource is directly supplied for different applications (such as greenhouse, spa, aquaculture, etc). These resources are usually found in areas where natural hot springs are found.
High-grade geothermal uses high temperature of the earth at depth of about 2.5 to 5 km in young volcanic areas for electric power generation. Today the world real potential for geothermal power generation is promising and exciting.
Due to environmental issues, geothermal power generation has become the second fastest-growing renewable power source in the world (after wind power) and the most secure type of energy among all conventional and alternative energy options.