EGS
Enhanced Geothermal Systems (EGS) or Engineered Geothermal Systems (EGS). The names are slightly different here, but the abbreviation is the same and the meaning is the same. Department of Energy US offers the following: “Although many discussions regarding EGS are commonly referenced to relatively deep environments (∼ > 6 km), enhancement of geothermal systems using engineering methods can be accomplished under any set of conditions. Hence, the phrase “enhanced geothermal systems” should not be restricted to only deep geothermal systems - any system that has been engineered by technological means in such a way that improved permeability or fluid mass flow can be considered an enhanced geothermal system.” In particular, Hot Dry Rock (HDR) is a special case of EGS [1]. The authors [2] propose a more physical approach: “This study recommends re-introducing three known definitions such as Petrothermal, Hydrothermal, as well as Hot Sedimentary Aquifers (HSA) and abandoning the ambiguous terminology such as EGS.” Here an additional concept - HSA, which has the features of both Hydrothermal and Petrothermal Systems, is introduced. For more information see Deep Geothermal Heat Overview.
REFERENCES
Alekseenko, S.V. (2023) Deep Geothermal Heat Overview, Thermopedia, Begell House.
Breede, K., Dzebisashvili, K., and Falcone, G. (2015) Overcoming Challenges in the Classification of Deep Geothermal Potential, Geoth. Energ. Sci., 3:19–39.
References
- Alekseenko, S.V. (2023) Deep Geothermal Heat Overview, Thermopedia, Begell House.
- Breede, K., Dzebisashvili, K., and Falcone, G. (2015) Overcoming Challenges in the Classification of Deep Geothermal Potential, Geoth. Energ. Sci., 3:19–39.