Development and Sustainability of Engineered Geothermal Systems

Reference work entry
Part of the Encyclopedia of Sustainability Science and Technology Series book series (ESSTS)

Glossary

Breakthrough time

The time taken for a tracing element (chemicals) to travel through a specified media (a reservoir) indicating a degree of channeling or dispersion of injected fluid passing through the reservoir.

EGS

Enhanced or engineered geothermal system; a geothermal system; a geothermal system engineered to mimic a natural system (hydrothermal) so that energy can be extracted from hot rocks at great depth.

Granite

Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granites usually have a medium- to coarse-grained texture and can contain radiogenic material which produces heat in the rock.

Igneous rocks

Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.

In situ stress

Forces that exit in the crustal plate, and the three mutually orthogonal components are...

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.EGS Energy LtdPenance CornwallUK
  2. 2.Hot Dry Rocks Pty LtdSouth YarraAustralia

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